Environmental Technology & Innovation最新文献_第2页

The evolution and configuration mechanism of spatial correlation network in China's innovation ecosystem

IF 6.7 2区环境科学与生态学

Environmental Technology & Innovation Pub Date : 2025-03-21 DOI: 10.1016/j.eti.2025.104157

Bo Wen , Fei Liu

{"title":"The evolution and configuration mechanism of spatial correlation network in China's innovation ecosystem","authors":"Bo Wen , Fei Liu","doi":"10.1016/j.eti.2025.104157","DOIUrl":"10.1016/j.eti.2025.104157","url":null,"abstract":"<div><div>Clarifying the spatial correlation network of the innovation ecosystem is essential for promoting balanced regional economic development and social prosperity. Based on data from 31 Chinese provinces between 2017 and 2022, this study employs methods such as game-theory-based combined weighting, the modified gravitational model, social network analysis, and fuzzy set qualitative comparative analysis to reveal the structural characteristics, evolutionary process, and configurational mechanism of China's innovation ecosystem. Key findings include: (1)Temporal Evolution: The development level of China's innovation ecosystem has significantly improved, with connections within the spatial correlation network emerging and strengthening over time. Jiangsu is identified as the most influential province. (2)Spatial Correlation: Eastern coastal provinces like Jiangsu, Shandong, and Zhejiang exhibit the strongest spatial correlations. In contrast, remote provinces such as Heilongjiang, Ningxia, and Hainan remain at the periphery, resulting in an \"east strong, west weak\" trend. (3)Regional Clusters: The regions are divided into two-way spillover clusters: one mainly composed of eastern and central provinces, and another consisting of North China provinces. These clusters show close internal exchange activities. (4)Influencing Factors: Geographical proximity, differences in innovation achievements, and enterprise vitality significantly impact the formation of the spatial correlation network. (5)Development Paths: The development paths of the innovation ecosystem can be categorized into a comprehensive-driven type \"enterprise innovation vitality - innovation achievements - international resources\" and a talent-driven type \"enterprise innovation vitality - higher education\". This study provides valuable insights into the structure, evolution, and influencing factors of China's innovation ecosystem, offering references for enhancing regional innovation capabilities and promoting balanced economic development.</div></div>","PeriodicalId":11725,"journal":{"name":"Environmental Technology & Innovation","volume":"38 ","pages":"Article 104157"},"PeriodicalIF":6.7,"publicationDate":"2025-03-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143696944","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}

引用次数: 0

Substitution of chemical fertilizer by biogas slurry maintain wheat yields by regulating soil properties and microbiomes

IF 6.7 2区环境科学与生态学

Environmental Technology & Innovation Pub Date : 2025-03-20 DOI: 10.1016/j.eti.2025.104161

Zhixiang Han , Tianyu Zheng , Wenkang Yan , Christopher Rensing , Houzhang Wu , Wenge Wu , Hongmiao Wu

{"title":"Substitution of chemical fertilizer by biogas slurry maintain wheat yields by regulating soil properties and microbiomes","authors":"Zhixiang Han , Tianyu Zheng , Wenkang Yan , Christopher Rensing , Houzhang Wu , Wenge Wu , Hongmiao Wu","doi":"10.1016/j.eti.2025.104161","DOIUrl":"10.1016/j.eti.2025.104161","url":null,"abstract":"<div><div>At present, there is a lack of refined management for biogas slurry after toilet reconstruction, making it difficult to achieve safe treatment and resource utilization of biogas slurry. Utilizing biogas slurry instead of chemical fertilizers is able to significantly mitigate these issues. We established five fertilization treatments to investigate the impact of biogas slurry substitution on wheat growth, soil properties, and soil microbiomes in field experiments with varying proportions of biogas slurry. Utilizing small amounts of biogas slurry as a replacement for chemical fertilizers was able to maintain soil nutrient levels while sustaining wheat yield (from 2766.76 kg/hm² to 2973.13 kg/hm²), stabilize urease and catalase activities, and improve microbial communities. Additionally, using a minor amount of biogas slurry as a substitute for fertilizer resulted in an increase in the population of potentially beneficial bacteria and a decrease in the presence of potential fungal pathogens. Random forest analysis showed that the potentially beneficial bacteria (<em>Stenotrophomonas</em>, <em>Streptomyces</em>, <em>Arenimonas</em>), potentially fungal pathogens (<em>Alternaria, Lectera</em>, <em>Fusarium</em>), and consumer protists (<em>Colpoda</em>, <em>Paracercomonas</em>, <em>Sandona</em>) are the dominant predictors of wheat yields. Structural equation modelling showed that the replacement of chemical fertilizers by biogas slurry directly and indirectly sustained crop yield by altering soil characteristics and the microbial community. Our results showed that replacing 20 % of fertilizer with biogas slurry was concurrently able to maintain crop productivity while safeguarding the environment. These results improve our comprehension of the impact of various biogas slurry substitutes and hold significant theoretical importance for advancing the utilization of biogas slurry in the future.</div></div>","PeriodicalId":11725,"journal":{"name":"Environmental Technology & Innovation","volume":"38 ","pages":"Article 104161"},"PeriodicalIF":6.7,"publicationDate":"2025-03-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143680143","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}

引用次数: 0

Investigating post-remediation management strategies for contaminated sites based on residual pollutant migration risks

IF 6.7 2区环境科学与生态学

Environmental Technology & Innovation Pub Date : 2025-03-20 DOI: 10.1016/j.eti.2025.104153

Dandan Chen , Tingting Fang , Zhuo Zhang , Yan Li , Xiaoyang Liu , Haolong Hu , Ruixue Miao , Guanlin Guo

{"title":"Investigating post-remediation management strategies for contaminated sites based on residual pollutant migration risks","authors":"Dandan Chen , Tingting Fang , Zhuo Zhang , Yan Li , Xiaoyang Liu , Haolong Hu , Ruixue Miao , Guanlin Guo","doi":"10.1016/j.eti.2025.104153","DOIUrl":"10.1016/j.eti.2025.104153","url":null,"abstract":"<div><div>Post-remediation management plays a crucial role in risk control for contaminated sites, ensuring environmental safety and facilitating site redevelopment. In this study, we assessed the regulatory status of 469 post-remediation sites, analyzing factors such as spatio-temporal distribution, residual pollutants, planned land use, and regulatory measures. Our findings revealed that current post-remediation management often exhibits a coexistence of insufficient and excessive regulatory oversight. To address these issues, we propose a risk classification framework aimed at refining management strategies and improving resource utilization efficiency. The classification system integrates precedence chart and fuzzy evaluation methods, categorizing the sites into three levels (Level I, II, and III), each corresponding to different treatment measures. Five typical sites were selected to validate the classification method, and the results confirmed its stability and scientific basis. The method was then applied to 104 post-remediation sites, where the classification revealed that 62.5 % of the sites were Level III, 15.4 % were Level II, and 22.1 % were Level I. Notably, the application of this method could simplify regulatory measures for 45.24 % of the sites, as some could shift to institutional control rather than requiring long-term monitoring combined with institutional control. The approach developed in this study provides a critical safeguard for the safe reuse of contaminated land, offers valuable insights for the effective development of post-remediation management, and accelerates the establishment of a post-remediation management system tailored to regional administrative conditions.</div></div>","PeriodicalId":11725,"journal":{"name":"Environmental Technology & Innovation","volume":"38 ","pages":"Article 104153"},"PeriodicalIF":6.7,"publicationDate":"2025-03-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143680141","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}

引用次数: 0

Green strategies for chromium detoxification in tannery effluents: Adsorption and bioconversion with Portieria hornemannii

IF 6.7 2区环境科学与生态学

Environmental Technology & Innovation Pub Date : 2025-03-19 DOI: 10.1016/j.eti.2025.104151

Manoj Sekaran, Kalaivani Thiagarajan

{"title":"Green strategies for chromium detoxification in tannery effluents: Adsorption and bioconversion with Portieria hornemannii","authors":"Manoj Sekaran, Kalaivani Thiagarajan","doi":"10.1016/j.eti.2025.104151","DOIUrl":"10.1016/j.eti.2025.104151","url":null,"abstract":"<div><div>Hexavalent chromium (Cr (VI)) is a toxic heavy metal contaminant that poses significant risks to living organisms. Notably, the red algae <em>Portieria hornemannii</em> has demonstrated the ability to adsorb and reduce chromium in aqueous environments. This study focuses on the effective on-site adsorption and bioconversion of Cr (VI) to Cr (III) using organized dead algal biomass enriched with active phytochemicals. The biomass's structural characteristics, surface morphology, functional groups, elemental composition, surface area, and porosity were thoroughly analyzed. Physiochemical parameters were optimized to enhance adsorption efficiency. Various adsorption isotherm models, including Langmuir, Freundlich, and Temkin, and kinetic models (pseudo-first-order and pseudo-second-order) were employed to analyze the adsorption process. The algal biosorbent achieved a maximum removal efficiency of 96.4 % at pH 2.0, with an adsorbate concentration of 300 ppm, an adsorbent dosage of 6 g/L, a temperature of 40 °C, and a contact time of 200 minutes. This study also investigated chromium levels in water released from chrome-tanning processes at tanneries and employed an optimized algal remediation technique. The evaluation of phytotoxic effects and growth metrics for <em>Vigna mungo</em> in the treated tannery water indicated a decrease in phytotoxicity, dropping from 80 % to 35 %. This research highlights the potential of utilizing dead algal biosorbents as an innovative and eco-friendly method for continuous industrial and environmental monitoring to protect groundwater resources.</div></div>","PeriodicalId":11725,"journal":{"name":"Environmental Technology & Innovation","volume":"38 ","pages":"Article 104151"},"PeriodicalIF":6.7,"publicationDate":"2025-03-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143680137","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}

引用次数: 0

A Comparative phycoremediation study of aquaculture wastewater treatment by Chlorella sp. immobilized in different hybrid-alginate matrices

IF 6.7 2区环境科学与生态学

Environmental Technology & Innovation Pub Date : 2025-03-18 DOI: 10.1016/j.eti.2025.104158

Akrm Mohamed Allzrag , Japareng Lalung , Noor Khalidah Abdul Hamid , Jebrel Abdeljawad Rashed , Rizwana Kausar , Mohd Asyraf Kassim

{"title":"A Comparative phycoremediation study of aquaculture wastewater treatment by Chlorella sp. immobilized in different hybrid-alginate matrices","authors":"Akrm Mohamed Allzrag , Japareng Lalung , Noor Khalidah Abdul Hamid , Jebrel Abdeljawad Rashed , Rizwana Kausar , Mohd Asyraf Kassim","doi":"10.1016/j.eti.2025.104158","DOIUrl":"10.1016/j.eti.2025.104158","url":null,"abstract":"<div><div>The management of aquaculture wastewater presents notable environmental challenges, requiring efficient remediation techniques. This study explores the use of naturally derived immobilization materials (starch, cellulose, and bacterial cellulose) for microalgal-based phycoremediation, by utilising immobilized <em>Chlorella sp.</em> and offers an eco-friendly alternative to conventional synthetic matrices. The study aimed to evaluate the best immobilized carrier, and to assess the effectiveness of immobilized microalgae in removing nutrients such as chemical oxygen demand (COD), biological oxygen demand (BOD), and total nitrogen (TN) from aquaculture, along with biomass and lipid productivity. In this study, the phycoremediation using microalgae immobilized with different carrier including starch, cellulose and bacterial cellulose were evaluated within 12 days treatment. The results indicated that <em>Chlorella sp.</em> immobilized in starch beads demonstrated higher phycoremediation efficiency by reducing the level of COD from 96 to 10.25 (mg/L), and BOD from 24 to 3.4 (mg/L), and TN level from 43 to 4 (mg/L). Cellulose beads also showed the highest lipid content (26.76 %). While bacterial-cellulose carrier showed higher biomass production at 39.38 mg/L and lipid productivity 38.33 mg/L/day This suggests that immobilized <em>Chlorella sp.</em> in bacterial-cellulose beads can effectively treat aquaculture wastewater and biofuel production. This study makes a significant contribution to the field of environmental biotechnology by providing a detailed analysis of the utilization of immobilized microalgae for sustainable waste management in aquaculture systems.</div></div>","PeriodicalId":11725,"journal":{"name":"Environmental Technology & Innovation","volume":"38 ","pages":"Article 104158"},"PeriodicalIF":6.7,"publicationDate":"2025-03-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143680135","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}

引用次数: 0

Geochemical process of arsenic source and fate in water environment of karst gold mining region, Southwestern China

IF 6.7 2区环境科学与生态学

Environmental Technology & Innovation Pub Date : 2025-03-18 DOI: 10.1016/j.eti.2025.104159

Xuefang Zha , Xuexian Li , Shiwan Chen , Bo Li , Xingxing Cao , Jiayan Huang , En Long , Pan Wu

{"title":"Geochemical process of arsenic source and fate in water environment of karst gold mining region, Southwestern China","authors":"Xuefang Zha , Xuexian Li , Shiwan Chen , Bo Li , Xingxing Cao , Jiayan Huang , En Long , Pan Wu","doi":"10.1016/j.eti.2025.104159","DOIUrl":"10.1016/j.eti.2025.104159","url":null,"abstract":"<div><div>This study investigated the hydrogeochemical characteristics, sources, distribution and rapid release mechanisms of potentially toxic elements (PTEs) in a typical Carlin-type gold mining area, characterised by intense hydrological cycles in a karst region. A total of 65 samples, including mine water, groundwater, surface water, and rainwater, were analyzed for hydrochemistry, trace elements, and stable isotopes. Results show that multi-scale hydraulic pathways accelerate the vertical transport of oxygen and water, promoting the oxidative dissolution of gold-bearing sulfides and leading to the activation and migration of PTEs. Notably, arsenic (As) release is particularly significant, with peak concentrations reaching 9.97 mg/L. The study reveals that As pollution mainly originates from the oxidative dissolution of arsenopyrite, pyrite, and realgar, while the contribution of silicate mineral weathering to As release is relatively limited. Mineralogical analysis of sediments reveals that secondary mineral (Yukonite) is the primary host for As, with As predominantly existing in adsorbed and poorly crystalline iron-bound forms. This demonstrates that surface adsorption and co-precipitation by iron oxides are key factors controlling As mobility and fate. The findings provide new insights into the migration mechanisms of As and other PTEs in karst gold mining areas and offer important references for global Carlin-type gold deposit environmental geochemical research.</div></div>","PeriodicalId":11725,"journal":{"name":"Environmental Technology & Innovation","volume":"38 ","pages":"Article 104159"},"PeriodicalIF":6.7,"publicationDate":"2025-03-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143680142","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}

引用次数: 0

Arbuscular mycorrhizal fungi decrease soil nitrate by accelerating mulberry uptake and dissimilatory nitrate reduction to ammonium

IF 6.7 2区环境科学与生态学

Environmental Technology & Innovation Pub Date : 2025-03-18 DOI: 10.1016/j.eti.2025.104139

Dan Xing , Huirong Zhang , Hongguang Cheng , Fang Zhang , Yanjin Shi , Shiqing Peng , Chaobin Luo , Gratien Twagirayezu

{"title":"Arbuscular mycorrhizal fungi decrease soil nitrate by accelerating mulberry uptake and dissimilatory nitrate reduction to ammonium","authors":"Dan Xing , Huirong Zhang , Hongguang Cheng , Fang Zhang , Yanjin Shi , Shiqing Peng , Chaobin Luo , Gratien Twagirayezu","doi":"10.1016/j.eti.2025.104139","DOIUrl":"10.1016/j.eti.2025.104139","url":null,"abstract":"<div><div>Karst landforms, characterized by their shallow and nutrient-poor soils, are susceptible to nitrate leaching loss, leading to environmental pollution and health risks. This study investigates the role of arbuscular mycorrhizal fungi (AMF) in mitigating deep soil nitrate accumulation through enhanced mulberry uptake and dissimilatory nitrate reduction to ammonium (DNRA). A 4-month symbiotic experiment with mulberry (<em>Morus alba</em> L.) and two AMF species (<em>Funneliformis mosseae</em> and <em>Rhizophagus intraradices</em>) was conducted. We found that AMF treatments significantly reduced soil nitrate levels by 10.5 %-58.9 %, while increased soil ammonium by 35.9 %-63.3 %, and enhanced mulberry nitrogen accumulation by 5.2 %-17.8 %. Microbial community analysis revealed significant shifts in nitrogen-cycling microorganisms, with <em>Proteobacteria</em>, <em>Acidobacteria</em>, and <em>Actinobacteria</em> as dominant phyla. AMF inoculation slowed nitrification and denitrification in deeper soil layers while accelerating DNRA, as evidenced by changes in the abundance of <em>nirK</em>/<em>nirS</em> and <em>nrfA</em>/<em>nrfH</em> genes. Structural equation modeling underscored the significant feedback effects of plants and soil nitrogen-cycling microorganisms under AMF influence. This study provides novel insights into the ecological benefits of mycorrhizal symbiosis in managing soil nitrogen dynamics.</div></div>","PeriodicalId":11725,"journal":{"name":"Environmental Technology & Innovation","volume":"38 ","pages":"Article 104139"},"PeriodicalIF":6.7,"publicationDate":"2025-03-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143680195","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}

引用次数: 0

Efficient pollutant and nutrient removal from restaurant wastewater using Chlorella vulgaris in a bubble column photobioreactor

IF 6.7 2区环境科学与生态学

Environmental Technology & Innovation Pub Date : 2025-03-18 DOI: 10.1016/j.eti.2025.104138

Imran Ahmad , Norhayati Abdullah , Koji Iwamoto , Ali Yuzir , Hesam Kamyab , Mostafa El-Sheekh , Jun Wei Roy Chong , Kuan Shiong Khoo

{"title":"Efficient pollutant and nutrient removal from restaurant wastewater using Chlorella vulgaris in a bubble column photobioreactor","authors":"Imran Ahmad , Norhayati Abdullah , Koji Iwamoto , Ali Yuzir , Hesam Kamyab , Mostafa El-Sheekh , Jun Wei Roy Chong , Kuan Shiong Khoo","doi":"10.1016/j.eti.2025.104138","DOIUrl":"10.1016/j.eti.2025.104138","url":null,"abstract":"<div><div>The rapid growth of restaurants due to people's changing lifestyles has been implicated in negative impacts on environmental sustainability made by restaurant wastewater (RWW). To overcome this challenge, this work cultivated <em>Chlorella vulgaris</em> with RWW in the Bubble Column Photobioreactor (BCPBR) to investigate the efficiency of removing pollutants and nutrients in this type of wastewater. Biomass productivity, chlorophyll, and lipid content were also determined. Fatty acid methyl esters (FAME) were extracted and analyzed by GC/MS. Maximum growth rate (0.18 day⁻¹) and productivity (88.7 mg/L/d) were achieved in autotrophic mode at 150 μmol/m²/sec (12:12 light-dark cycle). The highest pollutant removal efficiency from RWW was recorded at 130 μmol/m²/sec (16:8 light-dark cycle) with COD: 96.4% | BOD: 98.2% | FOG: 97.1% | TN: 99.7% | AN: 99.9% | TP: 99.9% | K: 98.3%. <em>Chlorella vulgaris</em> exhibited high lipid content (51.5%) and lipid productivity (2 mg/L/d) at 150 μmol/m²/sec (12:12 light-dark cycle), supporting its biofuel applications. Maximum chlorophyll content (42 μg/mL) was achieved during autotrophic growth at 100 μmol/m²/sec (24:0 light-dark cycle), highlighting its potential for high-value bioactive compounds. The FAME analysis results showed that long-chain saturated fatty acid (SFA) concentration increased when cultivated in RWW, enhancing biofuel quality. The fatty acid profile was composed of SFA (45–49%), MUFA (37–41%), and PUFA (9–12%), making it a suitable feedstock for sustainable biodiesel production. The treatment contributes to the circular economy concept by reducing the cost of nutrients and water required for microalgal cultivation, making the process economically viable and environmentally sustainable.</div></div>","PeriodicalId":11725,"journal":{"name":"Environmental Technology & Innovation","volume":"38 ","pages":"Article 104138"},"PeriodicalIF":6.7,"publicationDate":"2025-03-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143716033","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}

引用次数: 0

Determining whether biochar can effectively increase crop yields: A machine learning model development with imbalanced data

IF 6.7 2区环境科学与生态学

Environmental Technology & Innovation Pub Date : 2025-03-18 DOI: 10.1016/j.eti.2025.104154

Wenqi Jiao , Kechao Li , Min Zhou , Nana Zhou , Qiusong Chen , Tao Hu , Chongchong Qi

{"title":"Determining whether biochar can effectively increase crop yields: A machine learning model development with imbalanced data","authors":"Wenqi Jiao , Kechao Li , Min Zhou , Nana Zhou , Qiusong Chen , Tao Hu , Chongchong Qi","doi":"10.1016/j.eti.2025.104154","DOIUrl":"10.1016/j.eti.2025.104154","url":null,"abstract":"<div><div>Biochar, a broadly applied soil amendment, is considered a promising technique to enhance crop productivity; however, the conditions under which biochar application enhances crop yields remain uncertain for both researchers and farmers. In this study, multiple machine learning (ML) classification models were developed and compared to rapidly predict crop yield changes in response to biochar application using a dataset consisting of 648 samples from 28 countries. A random undersampling method combined with standardization was used to handle the dataset’s inherent imbalance, and three ML classification models were compared. The performance of the ML models was optimized by the grid search method, and the key features affecting crop yields were identified using model interpretation techniques. The results showed that the optimized random forest model achieved the best crop yield prediction performance, with a recall of 0.817 and an accuracy of 0.687 on the testing set. The most important feature in crop yield prediction was found to be the pH of the biochar, followed by the initial soil pH, the biochar addition rate, and the total nitrogen content of the initial soil. This study shows that ML models with imbalanced learning techniques can accurately and effectively identify positive or negative effects on crop yields with the addition of biochar. The results of this analysis provide important insights into the development of biochar addition strategies to help better achieve mutually beneficial outcomes for simultaneously increasing crop yields and biomass recycling.</div></div>","PeriodicalId":11725,"journal":{"name":"Environmental Technology & Innovation","volume":"38 ","pages":"Article 104154"},"PeriodicalIF":6.7,"publicationDate":"2025-03-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143680136","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}

引用次数: 0

A ferric chloride/sodium alginate/biochar composite as a filler for a permeable reactive barrier for removing Cr(VI) from groundwater

IF 6.7 2区环境科学与生态学

Environmental Technology & Innovation Pub Date : 2025-03-18 DOI: 10.1016/j.eti.2025.104155

Haihua Li , Xinyi Wang , Hongyu Nie , Yahui Xu , Xuehui Pei , Haozu Cheng , Gaojie Chai

{"title":"A ferric chloride/sodium alginate/biochar composite as a filler for a permeable reactive barrier for removing Cr(VI) from groundwater","authors":"Haihua Li , Xinyi Wang , Hongyu Nie , Yahui Xu , Xuehui Pei , Haozu Cheng , Gaojie Chai","doi":"10.1016/j.eti.2025.104155","DOIUrl":"10.1016/j.eti.2025.104155","url":null,"abstract":"<div><div>Chromium is regarded as one of the most hazardous heavy metals due to its potent and pervasive toxicity to the ecosystems and human beings. In this study, a ferric chloride (FeCl<sub>3</sub>), sodium alginate (SA) and biochar (BC) composite in a 3D network structure was obtained via pyrolysis and co-impregnation. Subsequently, it was used as a filler for permeable reaction barrier (PRB) to remove Cr(VI) pollution from groundwater. The results indicate that the Cr(VI) removal rate by FeCl<sub>3</sub>/SA/BC exceeded 63 % at pH values ranging from 2 to 8, exhibiting a broader pH adaptation range. The presence of Fe<sup>3</sup><sup>+</sup> and Mn<sup>2+</sup> facilitated the uptake and elimination of Cr(VI) by FeCl<sub>3</sub>/SA/BC, whereas the presence of Mg<sup>2+</sup>, Ca<sup>2+</sup>, Cl<sup>−</sup>, SO<sub>4</sub><sup>2−</sup>, HCO<sub>3</sub><sup>−</sup> and PO<sub>4</sub><sup>3−</sup> inhibited the adsorption of Cr(VI). A low flow rate proved advantageous in enhancing the removal efficiency of Cr(VI). Specifically, the adsorption capacity of FeCl<sub>3</sub>/SA/BC for Cr(VI) was 12.50 mg·g<sup>−1</sup> at an influent flow rate of 1.0 mL·min<sup>−1</sup>. The penetration time and depletion point were 14 days and 40 days, respectively. This material used as a filler for PRBs demonstrated good permeability with a permeability coefficient of 12.66 m·d<sup>−1</sup>. Furthermore, a thorough investigation of the structural, chemical and physicochemical properties of FeCl<sub>3</sub>/SA/BC, coupled with an investigation into the occurrence of chromium species in the reaction medium, revealed that its mechanism of action on Cr(VI) including electrostatic adsorption, redox and co-precipitation. Thus, FeCl<sub>3</sub>/SA/BC provides a cost-effective and efficient Cr(VI)-remediating filler for PRBs by exploiting agricultural waste resources.</div></div>","PeriodicalId":11725,"journal":{"name":"Environmental Technology & Innovation","volume":"38 ","pages":"Article 104155"},"PeriodicalIF":6.7,"publicationDate":"2025-03-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143680138","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}

引用次数: 0