{"title":"Air Pollution Interactions with Weather and Climate Extremes: Current Knowledge, Gaps, and Future Directions","authors":"Cenlin He, Rajesh Kumar, Wenfu Tang, Gabriele Pfister, Yangyang Xu, Yun Qian, Guy Brasseur","doi":"10.1007/s40726-024-00296-9","DOIUrl":"10.1007/s40726-024-00296-9","url":null,"abstract":"<div><h3>Purpose of Review</h3><p>During the past decade, weather and climate extremes, enhanced by climate change trends, have received tremendous attention because of their significant impacts on socio-economy, public health, and ecosystems. At the same time, many parts of the world still suffer from severe air pollution issues. However, whether and how air pollutants play a role in weather and climate systems through complex interactions and feedbacks with meteorology and ecosystems remains an open question. So far, only a relatively small number of studies have been conducted to understand and quantify air pollution interactions with weather and climate extremes. As a result, there is limited process-level knowledge of this topic and associated mechanisms. This review paper provides a concise synthesis of recent scientific advances, current knowledge gaps, and future directions on air pollution interactions with weather and climate extremes, such as extreme precipitation, floods, droughts, wildfires, and heat waves.</p><h3>Recent Findings</h3><p>There is evidence (albeit limited) that air pollution can contribute to or interact with each of the aforementioned extremes, and several possible mechanisms (e.g., physical, thermodynamical, dynamical, chemical, and ecological processes) have been identified and proposed to explain their relationships. However, there are still substantial knowledge gaps that need to be addressed in future studies, which will benefit from enhanced observational and modeling capabilities as well as interdisciplinary collaborations.</p><h3>Summary</h3><p>Overall, the air pollution interactions with weather and climate extremes are currently under-studied and less understood. More future research is needed for process-level investigations to improve the mechanistic understanding on this topic.</p></div>","PeriodicalId":528,"journal":{"name":"Current Pollution Reports","volume":"10 3","pages":"430 - 442"},"PeriodicalIF":6.4,"publicationDate":"2024-02-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139956358","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Somayeh Bakhtiari, Marjan Salari, Meysam Shahrashoub, Asma Zeidabadinejad, Gaurav Sharma, Mika Sillanpää
{"title":"A Comprehensive Review on Green and Eco-Friendly Nano-Adsorbents for the Removal of Heavy Metal Ions: Synthesis, Adsorption Mechanisms, and Applications","authors":"Somayeh Bakhtiari, Marjan Salari, Meysam Shahrashoub, Asma Zeidabadinejad, Gaurav Sharma, Mika Sillanpää","doi":"10.1007/s40726-023-00290-7","DOIUrl":"10.1007/s40726-023-00290-7","url":null,"abstract":"<div><h3>Purpose of Review</h3><p>Environmental pollution stemming from industrial, agricultural, and domestic activities is constantly increasing. The removal of these hazardous pollutants from the environment is inevitable, so finding and developing convenient, cost-effective, and biocompatible treatment methods is imperative. As emerging adsorbents, green nanoparticles (NPs) have received significant attention in recent years due to their biocompatibility and promising capability for removing pollutants such as heavy metals from aqueous solutions. This study aims to provide a comprehensive and coherent review of the heavy metals removal via an adsorption technique using green nanoparticles, focusing on their synthesis and adsorption mechanisms.</p><h3>Recent Findings</h3><p>Currently, plants and microorganisms are used to synthesize green nano-adsorbents. The antioxidant compounds in the extracts of different parts of the plants could be used as reducing agents for the synthesis of zero-valent metal nanoparticles. Moreover, they can be applied to the surface of nanoparticles, which enhances the stability of synthesized nanoparticles. In addition to plant-derived compounds, microorganisms can play a significant role in synthesizing green nanoparticles.</p><h3>Summary</h3><p>For decades, human health and the environment have been threatened by exposure to heavy metals caused by the activities of mines, industries, and factories. Therefore, there is a need to provide solutions to remove these pollutants from the environment. One of the effective solutions is the adsorption method. The efficiency of this method is strongly influenced by the selection of suitable adsorbents. In recent years, special attention has been paid to nano-adsorbents. Utilizing green nano-adsorbents, as opposed to conventional materials, is a critical strategy for reducing environmental pollutants, particularly for heavy metal adsorption from contaminated water and wastewater. This paper also discusses the sources and occurrence of heavy metals, as well as a number of environmental issues of methods that employ green and eco-friendly nano-adsorbents for heavy metals removal, including (i) the type of heavy metals and their use pattern, (ii) influencing factors, (iii) heavy metal analysis methods and their potential toxicity, and (iv) different conventional and cutting-edge nanotechnologies for water and wastewater treatment. The literature review, which covered the years 2002–2023, provided a critical illustration of current concerns about heavy metal contamination and removal efforts, with a focus on green nano-adsorbents and the use of these environmentally friendly materials.</p></div>","PeriodicalId":528,"journal":{"name":"Current Pollution Reports","volume":"10 1","pages":"1 - 39"},"PeriodicalIF":6.4,"publicationDate":"2024-02-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139903738","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Muhammad Aamer Mehmood, Mahwish Amin, Muhammad Nabeel Haider, Sana Malik, Hafiza Aroosa Malik, Md. Asraful Alam, Jingliang Xu, Abdulrahman H. Alessa, Aqib Zafar Khan, Raj Boopathy
{"title":"Wastewater-Grown Algal Biomass as Carbon-neutral, Renewable, and Low Water Footprint Feedstock for Clean Energy and Bioplastics","authors":"Muhammad Aamer Mehmood, Mahwish Amin, Muhammad Nabeel Haider, Sana Malik, Hafiza Aroosa Malik, Md. Asraful Alam, Jingliang Xu, Abdulrahman H. Alessa, Aqib Zafar Khan, Raj Boopathy","doi":"10.1007/s40726-024-00294-x","DOIUrl":"10.1007/s40726-024-00294-x","url":null,"abstract":"<div><h3>Purpose of Review</h3><p>Growing algae in wastewater offers carbon-neutral biomass production and pollutant removal. However, practical applications of wastewater-grown algal biomass have social acceptability issues in the food and feed industries due to unexpected threats (such as human/animal pathogens and toxins) associated with the wastewater-grown biomass. Therefore, considering the substantial pollutant removal potential of microalgae and the abundance of wastewater as a growth media, alternative bioprocessing routes of the wastewater-grown biomass should be developed. This review highlights some non-food and non-feed applications of wastewater-grown algae biomass.</p><h3>Recent Findings</h3><p>Wastewater-grown algal biomass contains high amounts of carbohydrates, proteins, and lipids depending upon the composition of wastewater and algal species grown. These three significant metabolites are precursors to bioenergy and biomaterial products such as bioethanol, biogas, and bioplastics. Hydrolysis of the wastewater-grown algal biomass can be easily improved to enhance the microbial fermentation yields to produce bioethanol and biobutanol. Fresh algal biomass, residual biomass, or both can be used as feedstocks in anaerobic digestion/co-digestion to produce biogas. Depending upon the selected species, wastewater-grown algal biomass can also produce biopolymers whose productivity depends on growth conditions, wastewater composition, and biopolymer synthesis method. Enzymatic, eco-friendly chemicals and mechanical approaches used to prepare biopolymers from algal biomass should be optimized for higher yields of biopolymers.</p><h3>Summary</h3><p>Although wastewater-grown biomass has acceptability issues, it offers certain environmental benefits, including atmospheric carbon capture, phycoremediation of pollutants, and water recycling. This manuscript highlights the recent progress and emerging trends of wastewater-grown algal biomass as a feedstock with potential applications for fermentation, anaerobic digestion, and bioprocessing to produce clean energy and bioplastics.</p><h3>Graphical Abstract</h3>\u0000<div><figure><div><div><picture><source><img></source></picture></div></div></figure></div></div>","PeriodicalId":528,"journal":{"name":"Current Pollution Reports","volume":"10 2","pages":"172 - 188"},"PeriodicalIF":6.4,"publicationDate":"2024-02-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139772619","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Enhancing Our Vision of Aerosols: Progress in Scattering Phase Function Measurements","authors":"Yuxuan Bian, Chunsheng Zhao","doi":"10.1007/s40726-024-00292-z","DOIUrl":"10.1007/s40726-024-00292-z","url":null,"abstract":"<div><h3>Purpose of Review</h3><p>Calculating atmospheric aerosol radiative forcing is a crucial aspect of climate change research. The aerosol scattering phase function stands out as a vital parameter for radiative forcing computations and holds significant importance in the remote sensing retrievals of aerosols. Despite its significance, research on aerosol scattering phase function measurements has been limited over the years. This review article provides a comprehensive summary of relevant studies on the measurements of aerosol scattering phase functions.</p><h3>Recent Findings</h3><p>In recent times, the application of imaging detection techniques in the measurement of aerosol scattering phase functions has emerged, highlighting advantages such as portability and high temporal-angular resolution. In addition, the development of aerosol retrieval algorithms facilitates a broader application of the results obtained from aerosol scattering phase function measurements in estimating aerosol physical properties and satellite retrievals.</p><h3>Summary</h3><p>This review introduces the measurement techniques, instruments, and retrieval algorithms associated with aerosol scattering phase functions, encompassing laboratory experiments, in situ field measurements, and remote sensing retrieval. The measurement results and related research on aerosol morphological effects and physical property retrievals have been summarized. Finally, it outlines future research prospects, suggesting improvements in instruments, experimental expansion, and enhanced data analysis and application, providing feasible suggestions for further studies.</p></div>","PeriodicalId":528,"journal":{"name":"Current Pollution Reports","volume":"10 1","pages":"87 - 104"},"PeriodicalIF":6.4,"publicationDate":"2024-02-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139689828","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Atmospheric Emissions from Electricity Generation in Southeast Asia: Development Trend and Policy Responses","authors":"Nguyen Thi Kim Oanh, Lai Nguyen Huy","doi":"10.1007/s40726-023-00289-0","DOIUrl":"10.1007/s40726-023-00289-0","url":null,"abstract":"<div><h3>Purpose of Review</h3><p>Rapid economic development accompanied by urbanization, motorization, and industrialization, together with population growth, puts great pressure on the power sector in Southeast Asia (SEA) to meet energy demand. This paper reviews the past 20-year power generation in SEA countries to analyze potential impacts on atmospheric pollution using DPSIR framework.</p><h3>Recent Findings</h3><p>In 2020, total region electricity generation reached 1050 TWh, 3.1 times above that of 2000, and is projected to further increase by 2.5 times in 2050. During the period, the annual per capita generation increased 2.4 times. Indonesia, Malaysia, Thailand, and Vietnam were the main electricity producers, sharing 83% in 2020. Coal and natural gas based thermal power plants (TPPs) were dominant with 72% of the total electricity produced, whereas low-carbon renewable energy, although increased during the period, shared only 25% in 2020. In 2018, the sectoral atmospheric emissions of different species increased by 2.4–11.5 times above 2000, contributing 55.3%, 26.8%, and 26.7% to the region’s total anthropogenic emissions of SO<sub>2</sub>, CO<sub>2</sub>, and NO<sub>x</sub>, respectively.</p><h3>Summary</h3><p>Heavy reliance on fossil fuels makes the power sector a key emission source of air pollutants and greenhouse gases. SEA governments have promulgated policies and regulations for TPPs and set net zero emissions targets. These policies, directly and/or indirectly address atmospheric pollution, once fully implemented, bring in more secure and sustainable power sources in the region, along with multiple benefits to air quality, human health, environment, ecosystem, and the climate.</p></div>","PeriodicalId":528,"journal":{"name":"Current Pollution Reports","volume":"10 1","pages":"54 - 69"},"PeriodicalIF":6.4,"publicationDate":"2024-01-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139561949","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Sources, Variations, and Effects on Air Quality of Atmospheric Ammonia","authors":"Ziru Lan, Weili Lin, Gang Zhao","doi":"10.1007/s40726-023-00291-6","DOIUrl":"10.1007/s40726-023-00291-6","url":null,"abstract":"<div><h3>Purpose of Review</h3><p>As the most abundant alkaline trace gas in the atmosphere, NH<sub>3</sub> plays a critical role in the formation of atmospheric particulate matter and nitrogen cycling in ecosystems. NH<sub>3</sub> emissions have been increasing globally over the past few decades. To provide a clearer understanding of atmospheric NH<sub>3</sub>, this paper presents a systematic review of the literature on the sources and variability of atmospheric NH<sub>3</sub> and describes the contribution of atmospheric NH<sub>3</sub> to PM<sub>2.5</sub>.</p><h3>Recent Findings</h3><p>(1) The primary source of atmospheric NH<sub>3</sub> emissions is agriculture; other sources include combustion-related emissions and volatilization from soil and oceans. However, recent studies have revealed the major role of nonagricultural sources in urban areas. (2) The spatiotemporal variability of atmospheric NH<sub>3</sub> is complex, and its mechanisms are not entirely clear. (3) Atmospheric NH<sub>3</sub> can participate in multiple atmospheric chemical processes and to the formation of fine particulate matter.</p><h3>Summary</h3><p>This review summarizes the latest knowledge on the sources and variability of atmospheric NH<sub>3</sub> and highlights the necessity of controlling atmospheric NH<sub>3</sub> emissions. However, significant knowledge gaps still exist in understanding the sources, trends, and effects of atmospheric NH<sub>3</sub>. Therefore, further research is essential to investigate the influencing factors and environmental effects of atmospheric NH<sub>3</sub> concentrations, providing a scientific basis for the development of effective NH<sub>3</sub> control strategies.</p></div>","PeriodicalId":528,"journal":{"name":"Current Pollution Reports","volume":"10 1","pages":"40 - 53"},"PeriodicalIF":6.4,"publicationDate":"2024-01-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139500146","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Zihao Zhang, Haiwei Li, Wingkei Ho, Long Cui, Qihui Men, Li Cao, Yunjiang Zhang, Junfeng Wang, Cheng Huang, Shun-cheng Lee, Yu Huang, Mindong Chen, Xinlei Ge
{"title":"Critical Roles of Surface-Enhanced Heterogeneous Oxidation of SO2 in Haze Chemistry: Review of Extended Pathways for Complex Air Pollution","authors":"Zihao Zhang, Haiwei Li, Wingkei Ho, Long Cui, Qihui Men, Li Cao, Yunjiang Zhang, Junfeng Wang, Cheng Huang, Shun-cheng Lee, Yu Huang, Mindong Chen, Xinlei Ge","doi":"10.1007/s40726-023-00287-2","DOIUrl":"10.1007/s40726-023-00287-2","url":null,"abstract":"<div><h3>Purpose of Review</h3><p>Complex air pollution has spread in the conurbation areas of China along with chemically complicated air pollution processes. Classic secondary-pollutant formation toward high concentrations of fine particulate matter (PM<sub>2.5</sub>) and ozone (O<sub>3</sub>) is imperfectly understood in the currently accepted chemical mechanisms. The combustion-produced fine particles contain abundant nanosized black carbon (BC) internally mixed with transition metal ions (TMI) and contribute to the complicated oxidation pathways and products substantially. Based on current understandings of multiphase sulfate formation, we propose that the surface-enhanced heterogeneous reaction processes can play critical roles in the fast formation of “haze chemistry smog” pollution.</p><h3>Recent Findings</h3><p>Pathways of sulfate enhancement by BC and TMI have been identified to explain the formation mechanisms of the missing sulfate sources. Responsible for additional production of secondary gas molecules and aerosols, the heterogeneous chemistry is initiated with surface photosensitive catalysis. In addition, unidentified atmospheric oxidizing capacity is recognized as part of the heterogeneous processes. Given unique surface-specific profiles and electronically excited dismutation reactions, BC and TMI particles can steadily generate reactive oxygen species (ROS) such as hydroxyl radicals (OH) and promote the oxidation of SO<sub>2</sub>. This phenomenon provides an extended insight into atmospheric free-radical chemistry. As such, the heterogeneous catalytic oxidation of SO<sub>2</sub> on aerosol surfaces accounts for up to 69.2% of sulfate formation in haze episodes.</p><h3>Summary</h3><p>Unlike in-cloud aqueous oxidation, representative heterogeneous reaction pathways (i.e., TMI aqueous catalysis pathway and surface catalysis pathway) enhance sulfate formation via surface radical reactions in both winter and summer. The heterogeneous processes are thought to reduce gaps between model-predicted and measured sulfate levels. The physically and chemically active BC and TMI can change the composition, morphology, hygroscopicity, and optical properties of PM in their atmospheric aging processes. Therefore, the heterogeneous pathways facilitate rapid particle growth for haze pollution and help to understand and develop a new type of air pollution chemistry (i.e., “haze chemistry” processes) in China and other developing countries.</p></div>","PeriodicalId":528,"journal":{"name":"Current Pollution Reports","volume":"10 1","pages":"70 - 86"},"PeriodicalIF":6.4,"publicationDate":"2024-01-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139458689","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Jajati Mandal, Pushpa Kumari Sharma, Debapriya Mondal, Michael D. Wood, Simon M. Hutchinson, Jason Kirby, Prashant Srivastava
{"title":"Meta-Analysis of Biochar as an Amendment for Arsenic Mitigation in Paddy Soils","authors":"Jajati Mandal, Pushpa Kumari Sharma, Debapriya Mondal, Michael D. Wood, Simon M. Hutchinson, Jason Kirby, Prashant Srivastava","doi":"10.1007/s40726-023-00288-1","DOIUrl":"10.1007/s40726-023-00288-1","url":null,"abstract":"<div><h3>Purpose of Review</h3><p>The purpose of this review is to evaluate the effectiveness of biochar in immobilizing arsenic (As) in contaminated paddy soils and its impact on As availability and bioaccumulation in rice, as well as rice plant biomass.</p><h3>Recent Findings</h3><p>Recent studies have focused on managing As contamination in agricultural fields, with a particular focus on South and Southeast Asia, where rice, a primary food source and As accumulator, is of significant concern. Biochar, a product of biomass pyrolysis, has emerged as a viable solution for environmental remediation due to its effectiveness in immobilizing metal(loid)s in water and soil. The successful implementation of biochar as a soil amendment strategy has led to growing interest in its use as an effective means of reducing the bioaccumulation and availability of metal(loid)s, including As.</p><h3>Summary</h3><p>A meta-analysis of 25 studies revealed that biochar generated from maize and sewage sludge successfully reduced As availability and bioaccumulation in rice grains. In addition, the use of biochar led to higher biomass and yield of rice crops compared to control groups. Modified biochar was more effective in decreasing As availability, likely due to interactions with iron and calcium phases or complexes occurring in or on the biochars. Nevertheless, at elevated biochar dosages, As mobilization was noted in field conditions which warrants further investigation.</p></div>","PeriodicalId":528,"journal":{"name":"Current Pollution Reports","volume":"10 1","pages":"105 - 118"},"PeriodicalIF":6.4,"publicationDate":"2024-01-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://link.springer.com/content/pdf/10.1007/s40726-023-00288-1.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139372997","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Michael J. B. Lotinga, Carlos Ramos-Romero, Nathan Green, Antonio J. Torija
{"title":"Noise from Unconventional Aircraft: A Review of Current Measurement Techniques, Psychoacoustics, Metrics and Regulation","authors":"Michael J. B. Lotinga, Carlos Ramos-Romero, Nathan Green, Antonio J. Torija","doi":"10.1007/s40726-023-00285-4","DOIUrl":"10.1007/s40726-023-00285-4","url":null,"abstract":"<div><h3>Purpose of Review</h3><p>This review aims to evaluate and discuss the current advances in the measurement and assessment of the noise generated by unconventional aircraft, such as unmanned aircraft systems (UAS) and urban air mobility (UAM) vehicles. Building upon the findings of this review, research gaps are identified, and further work is proposed to enhance existing and emerging methods for the appropriate noise management of these advanced air mobility (AAM) technologies.</p><h3>Recent Findings</h3><p>Noise has been highlighted as one of the key concerns for the wider deployment of UAS and UAM operations. This is suggested to be due to having acoustic signatures with sound characteristics commonly associated with noise annoyance, such as ‘sharpness’ (the perceived proportion of high-pitched sonic energy) and ‘tonality’ (the perceptual prominence of concentrated sonic energy at discrete frequencies). These types of ‘psychoacoustic features’ are thought to be connected with observations of increased noise annoyance for AAM, compared with conventional aircraft and road vehicles, at the same level of sound exposure.</p><h3>Summary</h3><p>In the last few years, there has been a growing body of research on UAS and UAM noise. Research has focused on a comprehensive understanding of the sound sources of these unconventional aircraft under a wide range of operating and operational conditions. Based on gathered evidence, measurement protocols for both laboratory and field studies are very advanced for the acoustic characterisation of UAS in terms of sound level, frequency and directivity. Looking at the human response to UAS and UAM noise, loudness has been consistently reported as the main contributor to noise annoyance, with second-order contributions from other psychoacoustic features, such as sharpness, tonality and ‘amplitude modulation’ (fluctuations in loudness over time), varying among studies. Noise targets for UAS certification have been derived from existing regulations for conventional aircraft and rotorcraft, but might not account for the usually reported annoyance offset between UAS/UAM and conventional vehicles. Key research gaps identified include the lack of studies focusing on multiple events, and deeper understanding of the influence that personal or contextual factors may have on responses, which will be important for the development of robust methods for the assessment and minimisation of community noise annoyance due to the operation of these unconventional aircraft.</p><h3>Graphical Abstract</h3><div><figure><div><div><picture><source><img></source></picture></div></div></figure></div></div>","PeriodicalId":528,"journal":{"name":"Current Pollution Reports","volume":"9 4","pages":"724 - 745"},"PeriodicalIF":6.4,"publicationDate":"2023-12-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://link.springer.com/content/pdf/10.1007/s40726-023-00285-4.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"138546630","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Minh Thuy Le, Chi Dat Pham, Thi Phuong Thao Nguyen, Thanh Long Nguyen, Quoc Cuong Nguyen, Ngoc Bich Hoang, Long D. Nghiem
{"title":"Wireless Powered Moisture Sensors for Smart Agriculture and Pollution Prevention: Opportunities, Challenges, and Future Outlook","authors":"Minh Thuy Le, Chi Dat Pham, Thi Phuong Thao Nguyen, Thanh Long Nguyen, Quoc Cuong Nguyen, Ngoc Bich Hoang, Long D. Nghiem","doi":"10.1007/s40726-023-00286-3","DOIUrl":"10.1007/s40726-023-00286-3","url":null,"abstract":"<div><h3>Purpose of Review</h3><p>The ability to monitor soil moisture wirelessly can deliver immense benefits to annual crops. Real-time soil moisture monitoring allows for accurate and on-demand irrigation to achieve optimal growth and avoid overwatering. It is also an effective pollution prevention method, eliminating excessive run-off to prevent soil erosion, sediment discharge, and the dispersion of key water pollutants such as nitrogen and phosphorus to natural waterway. Current soil moisture sensors require constant a power supply or battery. Wiring can be used for soil moisture sensing of perennial crops but is also not suitable for annual crops that require significant tillage. This review aims to delineate the readiness of moisture sensors and wireless power transfer technology for developing a wireless soil moisture sensing network.</p><h3>Recent Findings</h3><p>Of the many types of soil moisture sensors, only a few are compatible to a wireless network. They either are too expensive, have unreliable measurement accuracy, or require too much power. This review shows that capacitive sensor is a potential candidate for underground sensor networks in terms of affordability, measurement reliability, and power consumption. In addition, among all currently available wireless power transfer technologies, inductive power transfer has the potential to supply adequate power for wirelessly charging underground sensors and meet other requirements of an underground sensing network.</p><h3>Summary</h3><p>This review evaluates available soil moisture sensing and wireless power transfer techniques for wireless underground moisture sensing. The combination of capacitive sensing and inductive power transfer technologies has been identified as a potential solution for wireless underground sensor networks. Future research should focus on improving the calibration and post-processing algorithm for capacitive sensor while the misalignment and impact of soil need to be considered to enhance the performance of the inductive power transfer system.</p></div>","PeriodicalId":528,"journal":{"name":"Current Pollution Reports","volume":"9 4","pages":"646 - 659"},"PeriodicalIF":6.4,"publicationDate":"2023-11-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"138534071","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}