Frontiers of Environmental Science & Engineering最新文献_第2页

UV/Chlorine-BAC treatment of antidepressant drug in drinking water: efficacy, process optimization, and microbiological characterization 紫外线/氯-BAC 处理饮用水中的抗抑郁药物：功效、工艺优化和微生物特征

IF 6.4 2区环境科学与生态学

Frontiers of Environmental Science & Engineering Pub Date : 2024-08-10 DOI: 10.1007/s11783-024-1887-1

Xianzhong Li, Wanli Yan, Jianguo Li, Kaiting Zhang, Chengsong Ye, Mingbao Feng, Xin Yu

{"title":"UV/Chlorine-BAC treatment of antidepressant drug in drinking water: efficacy, process optimization, and microbiological characterization","authors":"Xianzhong Li, Wanli Yan, Jianguo Li, Kaiting Zhang, Chengsong Ye, Mingbao Feng, Xin Yu","doi":"10.1007/s11783-024-1887-1","DOIUrl":"https://doi.org/10.1007/s11783-024-1887-1","url":null,"abstract":"The environmental pollution caused by psychotropic drugs harms human health and has prompted a stronger emphasis on research into water treatment measures. The UV/Chlorine-biological activated carbon (BAC) combined process was employed in this study to treat amitriptyline (AMT), a typical psychotropic drug, in slightly contaminated drinking water. The removal efficiency of AMT in drinking water by UV/Chlorine and the feasibility of combining it with BAC were determined. The results demonstrated that the removal efficiency of 1 μmol/L AMT could reach 98.5% of the 2.0 mg/L chlorine and UV treated for 30 min. A significant removal improvement of AMT was 10%–45% compared to UV alone, Chlorine alone, and other oxidants combined, especially the SOUR (Specific Oxygen Uptake Rate), which was 57%–90% compared to other oxidants combined. Secondly, the optimal process parameters for UV/Chlorine-BAC treatment of slightly contaminated drinking water were a combination of UV exposure, chlorine dosage of 2 mg/L, and reaction times of 15 min followed by 30 min of BAC treatment. The AMT degradation, CODMn removal efficiency, and NO3−–N production was 88%, 65%, and 95%, respectively. There was no significant effect on the number of microorganisms in the BAC medium, ensuring good long-term operation. Furthermore, an investigation was conducted to assess the influence of optimal process operation on the microbial community structure within BAC. This analysis unveiled a positive feedback loop in the colony architecture after implementing ideal process parameters. This study provides significant inspiration for addressing residual antidepressant issues using traditional drinking water treatment processes.\u0000","PeriodicalId":12720,"journal":{"name":"Frontiers of Environmental Science & Engineering","volume":null,"pages":null},"PeriodicalIF":6.4,"publicationDate":"2024-08-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142192085","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}

引用次数: 0

Thermal degradation and hydrolysis depolymerization of printing ink components for plastic packaging in recycling processes: a review 塑料包装印刷油墨成分在回收过程中的热降解和水解解聚：综述

IF 6.4 2区环境科学与生态学

Frontiers of Environmental Science & Engineering Pub Date : 2024-08-06 DOI: 10.1007/s11783-024-1888-0

Jinyang Guo, Cong Luo, Zhi Kai Chong, Ayah Alassali, Kerstin Kuchta

{"title":"Thermal degradation and hydrolysis depolymerization of printing ink components for plastic packaging in recycling processes: a review","authors":"Jinyang Guo, Cong Luo, Zhi Kai Chong, Ayah Alassali, Kerstin Kuchta","doi":"10.1007/s11783-024-1888-0","DOIUrl":"https://doi.org/10.1007/s11783-024-1888-0","url":null,"abstract":"This review covers the decomposition mechanisms of various printing ink binder resins, with a particular focus on their behavior under extrusion conditions in the mechanical recycling process of polyolefin (PO) based plastic packaging. Thermal degradation and hydrolysis of the nitrocellulose (NC) — the most used binder for flexographic surface printing on single-layer flexible plastic packaging, occur concurrently during the mechanical recycling process under 160–210 °C. For other printing ink binders, polyurethane (PU) noticeable degradation takes place between 200 and 300 °C, mostly above 250 °C. However, with the involvement of humidity, degradation by hydrolysis can start from 150 °C. A similar effect is also discovered with the cellulose acetate (CA) derivatives, which are thermally stable until 300 °C and can be hydrolyzed at 100 °C. The thermal stability of polyvinyl butyral (PVB) is not influenced by humidity, with thermal stability ranging from 170 to 260 °C, depending on different types. Ultraviolet (UV)-cured acrylics are thermally stable until 400 °C. The hydrolysis degradation can take place at room temperature. Moreover, this review covers the thermal stability of different colorants used for printing ink application and elaborates on several thermal-stable alternatives of some common colors. This study further reviews how the binder resin affects the quality of recyclates, revealing it to be not only induced by the degradation of the binder resin but also by the immiscibility between the plastic and binder resin. In advanced recycling processes, mainly selective dissolution-precipitation and pyrolysis, the presence of binder resin and its degradation products could still affect the quality of the product. This review accentuates the imperative need for in-depth research to unravel the impact of printing ink constituents on the quality of recycled products.\u0000","PeriodicalId":12720,"journal":{"name":"Frontiers of Environmental Science & Engineering","volume":null,"pages":null},"PeriodicalIF":6.4,"publicationDate":"2024-08-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141948843","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}

引用次数: 0

Association between ambient NO2 exposure and health status in a floating population: findings from 338 cities in China 环境二氧化氮暴露与流动人口健康状况之间的关系：中国 338 个城市的调查结果

IF 6.4 2区环境科学与生态学

Frontiers of Environmental Science & Engineering Pub Date : 2024-08-01 DOI: 10.1007/s11783-024-1881-7

Yukun Shi, Yang Zhao, Guangcheng Wang, Jikai Xia, Luyang Wang, Hongyu Li, Wenhui Gao, Shijia Yuan, Ronghang Liu, Surong Zhao, Chunlei Han

{"title":"Association between ambient NO2 exposure and health status in a floating population: findings from 338 cities in China","authors":"Yukun Shi, Yang Zhao, Guangcheng Wang, Jikai Xia, Luyang Wang, Hongyu Li, Wenhui Gao, Shijia Yuan, Ronghang Liu, Surong Zhao, Chunlei Han","doi":"10.1007/s11783-024-1881-7","DOIUrl":"https://doi.org/10.1007/s11783-024-1881-7","url":null,"abstract":"Few studies investigated the effects of exposure to NO2 on health status in the Chinese floating population. The present cross-sectional study evaluated the association of ambient NO2 with health status in a floating population in China. Data on 168961 floating individuals in 338 cities were obtained from the 2017 China Migrants Dynamic Survey. The association between exposure to NO2 and self-related health (SRH) status was assessed by binary logistic regression analysis, both in the entire subject cohort and in subgroups assorted by socioeconomic levels and demographic characteristics. The robustness of the associations between NO2 exposure and health status was evaluated by sensitivity analyses. Each grade increment of annual average NO2 exposure was found to increase the risk of poor SRH by 2.4% in the floating population (odds ratio [OR] = 1.024, 95% confidence interval [CI]: 1.011–1.038). When subgrouped by age, subjects in the floating population aged 31–49 years had the highest NO2 associated health risk (OR = 1.036, 95% CI: 1.018–1.054). When subgrouped by per capita gross domestic product (PGDP), subjects in regions with mid-level PDGP had the highest NO2 associated SRH (OR = 1.116, 95% CI: 1.091–1.141). These findings indicated that exposure to NO2 increases the risk of poor SRH in the floating population, with individuals aged 31–49 years and those living in mid-level PGDP regions being more sensitive to the adverse effects of NO2. More effective strategies to reduce air pollution may improve the health status of the floating population in China.\u0000","PeriodicalId":12720,"journal":{"name":"Frontiers of Environmental Science & Engineering","volume":null,"pages":null},"PeriodicalIF":6.4,"publicationDate":"2024-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141948784","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}

引用次数: 0

Socioeconomic drivers of the human microbiome footprint in global sewage 全球污水中人类微生物组足迹的社会经济驱动因素

IF 6.4 2区环境科学与生态学

Frontiers of Environmental Science & Engineering Pub Date : 2024-08-01 DOI: 10.1007/s11783-024-1889-z

Minglei Ren, Shaojuan Du, Jianjun Wang

{"title":"Socioeconomic drivers of the human microbiome footprint in global sewage","authors":"Minglei Ren, Shaojuan Du, Jianjun Wang","doi":"10.1007/s11783-024-1889-z","DOIUrl":"https://doi.org/10.1007/s11783-024-1889-z","url":null,"abstract":"The human microbiome leaves a legacy in sewage ecosystems, also referred to as the human sewage microbiomes (HSM), and could cause potential risk to human health and ecosystem service. However, these host-associated communities remain understudied, especially at a global scale, regarding microbial diversity, community composition and the underlying drivers. Here, we built a metagenomic read mapping-based framework to estimate HSM abundance in 243 sewage samples from 60 countries across seven continents. Our approach revealed that 95.03% of human microbiome species were identified from global sewage, demonstrating the potential of sewage as a lens to explore these human-associated microbes while bypassing the limitations of human privacy concerns. We identified significant biogeographic patterns for the HSM community, with species richness increasing toward high latitudes and composition showing a distance-decay relationship at a global scale. Interestingly, the HSM communities were mainly clustered by continent, with those from Europe and North America being separated from Asia and Africa. Furthermore, global HSM diversity was shown to be shaped by both climate and socioeconomic variables. Specifically, the average annual temperature was identified as the most important factor for species richness (33.18%), whereas economic variables such as country export in goods and services contributed the most to the variation in community composition (27.53%). Economic and other socioeconomic variables, such as education, were demonstrated to have direct effects on the HSM, as indicated by structural equation modeling. Our study provides the global biogeography of human sewage microbiomes and highlights the economy as an important socioeconomic factor driving host-associated community composition.\u0000","PeriodicalId":12720,"journal":{"name":"Frontiers of Environmental Science & Engineering","volume":null,"pages":null},"PeriodicalIF":6.4,"publicationDate":"2024-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141948785","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}

引用次数: 0

Prevalence of class 1 integron and its gene cassettes carrying antibiotic resistance genes in drinking water treatment and distribution systems 饮用水处理和分配系统中携带抗生素耐药基因的 1 类整合子及其基因盒的普遍性

IF 6.4 2区环境科学与生态学

Frontiers of Environmental Science & Engineering Pub Date : 2024-07-26 DOI: 10.1007/s11783-024-1886-2

Shengnan Liu, Zihan Li, Yan Shen, Shuyu Jia, Peng Liu, Xu-Xiang Zhang

{"title":"Prevalence of class 1 integron and its gene cassettes carrying antibiotic resistance genes in drinking water treatment and distribution systems","authors":"Shengnan Liu, Zihan Li, Yan Shen, Shuyu Jia, Peng Liu, Xu-Xiang Zhang","doi":"10.1007/s11783-024-1886-2","DOIUrl":"https://doi.org/10.1007/s11783-024-1886-2","url":null,"abstract":"Class 1 integrons are vital mobile genetic elements involved in the environmental transmission of antibiotic resistance genes (ARGs). However, knowledge about the diversity and abundance of class 1 integrons and gene cassettes during drinking water treatment and distribution is still limited. In this study, we aimed to uncover the prevalence of class 1 integrons in the drinking water treatment and distribution systems with the combination of culture-dependent and culture-independent methods. Further, we applied the nanopore sequencing method to characterize the diversity and arrangement of ARGs carried by class 1 integron-associated gene cassettes. A total of 42 isolates were intI1-positive among the 208 strains isolated from drinking water, which tended to confer multi-drug resistance compared with intI1-negative isolates. The absolute abundance of the intI1 average 1.15 × 109 copies/L in the source water and underwent the most significant reduction of over 99.9% after liquid chlorine disinfection. Furthermore, nanopore sequencing revealed that the class 1 integron-associated gene cassettes carried 51 subtypes of ARGs in drinking water, mainly conferring resistance to aminoglycosides and trimethoprim. The treatment processes, especially liquid chlorine disinfection, reduced most of the ARGs carried by gene cassettes, though some of the ARG subtypes persisted along the treatment and distribution like aac(6′)-II, aadA, and dfrB2. The antibiotic resistance gene cassette array ∣aac(6′)-II∣arr∣ was most frequently detected, especially in the chlorinated water. This study underlined that drinking water was potential reservoir for integron-mediated ARGs transfer, indicating that the health risks of resistance gene cassettes in class 1 integrons deserved urgent attention.\u0000","PeriodicalId":12720,"journal":{"name":"Frontiers of Environmental Science & Engineering","volume":null,"pages":null},"PeriodicalIF":6.4,"publicationDate":"2024-07-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141948787","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}

引用次数: 0

Overlooked risk of microplastics from municipal solid waste–storage site 被忽视的城市固体废物贮存场产生微塑料的风险

IF 6.4 2区环境科学与生态学

Frontiers of Environmental Science & Engineering Pub Date : 2024-07-20 DOI: 10.1007/s11783-024-1885-3

Ying Hu, Shuli Guo, Dongsheng Shen, Jiali Shentu, Li Lu, Shengqi Qi, Min Zhu, Yuyang Long

{"title":"Overlooked risk of microplastics from municipal solid waste–storage site","authors":"Ying Hu, Shuli Guo, Dongsheng Shen, Jiali Shentu, Li Lu, Shengqi Qi, Min Zhu, Yuyang Long","doi":"10.1007/s11783-024-1885-3","DOIUrl":"https://doi.org/10.1007/s11783-024-1885-3","url":null,"abstract":"Municipal solid waste (MSW) storage sites are potential and overlooked contributors to microplastic (MP) pollution. Herein, the distribution and dispersion characteristics of MPs at MSW storage sites were investigated through modeling, sampling analysis, and prediction methodologies. The results indicated a notable adsorption phenomenon of MPs on smooth surfaces within such sites, achieving high saturation levels and making MPs prone to re-release by airflow disturbance. Quantitative analysis revealed that the MP concentrations on these surfaces varied from 4.48 × 105 to 1.90 × 106 n/m2 and that MPs predominantly accumulated in the corner areas. Notably, MP accumulation on wall surfaces can be reduced by 76.4% using washing procedures. The majority of MPs were under 50 µm in size and were primarily in fragment form. Operational activities such as ventilation and waste handling were identified to amplify the airborne spread of MPs. The atmospheric concentrations of MPs peaked seasonally, with concentrations of 28.25 n/m3 in summer and 3.90 n/m3 in winter, and the spatial dispersion ranged from 14.98 to 124.08 km2 per station. This study highlights that MSW storage sites are substantial yet overlooked sources of MP pollution, where wall surfaces play a critical role in MP adsorption and dispersal. The implementation of robust management and cleaning protocols is essential to mitigate the environmental footprint of MPs emanating from these locations. This study also provides a typical case for the precise prevention and control of MPs in the environment.\u0000","PeriodicalId":12720,"journal":{"name":"Frontiers of Environmental Science & Engineering","volume":null,"pages":null},"PeriodicalIF":6.4,"publicationDate":"2024-07-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141779027","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}

引用次数: 0

Distribution characteristics and removal rate of antibiotics and antibiotic resistance genes in different treatment processes of two drinking water plants 两家饮用水厂不同处理工艺中抗生素和抗生素耐药基因的分布特征和去除率

IF 6.4 2区环境科学与生态学

Frontiers of Environmental Science & Engineering Pub Date : 2024-07-19 DOI: 10.1007/s11783-024-1877-3

Jun Wang, Mingtao Huang, Bolin Li, Hassan Ibrahim Mohamed, Huanjie Song, Gezi Li, Ying Yu, Han Zhang, Weimin Xie

{"title":"Distribution characteristics and removal rate of antibiotics and antibiotic resistance genes in different treatment processes of two drinking water plants","authors":"Jun Wang, Mingtao Huang, Bolin Li, Hassan Ibrahim Mohamed, Huanjie Song, Gezi Li, Ying Yu, Han Zhang, Weimin Xie","doi":"10.1007/s11783-024-1877-3","DOIUrl":"https://doi.org/10.1007/s11783-024-1877-3","url":null,"abstract":"Emerging pollutants, such as antibiotics and antibiotic-resistance genes, are becoming increasingly important sources of safety and health concerns. Drinking water safety, which is closely related to human health, should receive more attention than natural water body safety. However, minimal research has been performed on the efficacy of existing treatment processes in water treatment plants for the removal of antibiotics and antibiotic resistance genes. To address this research gap, this study detected and analyzed six main antibiotics and nine antibiotic resistance genes in the treatment processes of two drinking water plants in Wuhan. Samples were collected over three months and then detected and analyzed using ultra-high-performance liquid chromatography-tandem mass spectrometry and fluorescence quantitation. The total concentrations of antibiotics and antibiotic resistance genes in the influent water of the two water plants were characterized as December > March > June. The precipitation and filtration processes of the Zou Maling Water Plant and Yu Shidun Water Plant successfully removed the antibiotics. The ozone-activated carbon process increased the removal rate of most antibiotics to 100%. However, a large amount of antibiotic resistance gene residues remained in the effluents of the two water plants. The experiments demonstrated that the existing ozone-activated carbon processes could not effectively remove antibiotic resistance genes. This study provides a reference for the optimization of drinking water treatment processes for antibiotics and antibiotic resistance gene removal.\u0000","PeriodicalId":12720,"journal":{"name":"Frontiers of Environmental Science & Engineering","volume":null,"pages":null},"PeriodicalIF":6.4,"publicationDate":"2024-07-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141779024","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}

引用次数: 0

Effective advance treatment of secondary effluent from industrial parks by the Mn-based catalyst ozonation process 利用锰基催化剂臭氧工艺对工业园区二级污水进行有效的预处理

IF 6.4 2区环境科学与生态学

Frontiers of Environmental Science & Engineering Pub Date : 2024-07-17 DOI: 10.1007/s11783-024-1884-4

Zhijuan Niu, Shihao Han, Weihua Qin, Pan Gao, Feng Xiao, Shaoxia Yang

{"title":"Effective advance treatment of secondary effluent from industrial parks by the Mn-based catalyst ozonation process","authors":"Zhijuan Niu, Shihao Han, Weihua Qin, Pan Gao, Feng Xiao, Shaoxia Yang","doi":"10.1007/s11783-024-1884-4","DOIUrl":"https://doi.org/10.1007/s11783-024-1884-4","url":null,"abstract":"Catalytic ozonation is a potential technology to eliminate refractory organic contaminants with the low concentration in secondary effluent from industrial park wastewater treatment plants (IPWWTPs). In this study, the catalytic ozonation over the Mn-based catalyst significantly improved the chemical oxygen demand (COD), total organic carbon (TOC), and UV254 removals of secondary effluent from IPWWTPs. The Mn-based catalyst/O3 system achieved 84.8%, 69.8%, and 86.4% removals of COD, TOC, and UV254, which were 3.3, 5.7, and 1.1 times that in ozonation alone, respectively. Moreover, the Mn-based catalytic ozonation process exhibited excellent pH tolerance ranging from pH 4.0 to 9.0. Additionally, the depth analysis based on fluorescence excitation-emission matrix (EEM) confirmed that the catalytic ozonation process preferred to degrade toxic aromatic hydrocarbons. The existence of the Mn-based catalyst/O3 system enhanced 21.4%–38.3% more fluorescent organic matters removal, compared to that in ozonation alone. Mechanistic studies proved that the abundant Lewis acid sites (Mnn+/Mn(n+1)+ and adsorbed oxygen) on the surface of the Mn-based catalyst effectively promoted O3 decomposition into reactive oxygen species (ROS), and ·O2−/HO2· and 1O2 were the main ROS for degrading refractory organic contaminants. The contributions of ROS oxidation (91.2%) was much higher than that of direct O3 oxidation (8.8%). Thus, this work provides an effective advanced treatment process for purifying secondary effluent from IPWWTPs.\u0000","PeriodicalId":12720,"journal":{"name":"Frontiers of Environmental Science & Engineering","volume":null,"pages":null},"PeriodicalIF":6.4,"publicationDate":"2024-07-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141779026","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}

引用次数: 0

Fabrication of the TiO2/Ti3C2 loaded ceramic membrane targeting for photocatalytic degradation of PPCPs: ciprofloxacin, tetracycline, and ibuprofen 制备用于光催化降解 PPCPs（环丙沙星、四环素和布洛芬）的 TiO2/Ti3C2 负载陶瓷膜靶材

IF 6.4 2区环境科学与生态学

Frontiers of Environmental Science & Engineering Pub Date : 2024-07-17 DOI: 10.1007/s11783-024-1883-5

Taisheng Zhao, Xiaoman Liu, Lankun Huai, Rui Feng, Tao Yan, Weiying Xu, Yanxia Zhao

{"title":"Fabrication of the TiO2/Ti3C2 loaded ceramic membrane targeting for photocatalytic degradation of PPCPs: ciprofloxacin, tetracycline, and ibuprofen","authors":"Taisheng Zhao, Xiaoman Liu, Lankun Huai, Rui Feng, Tao Yan, Weiying Xu, Yanxia Zhao","doi":"10.1007/s11783-024-1883-5","DOIUrl":"https://doi.org/10.1007/s11783-024-1883-5","url":null,"abstract":"Photocatalytic membranes offer an effective strategy to overcome the difficulties of solid-liquid separation and secondary contamination of powdered photocatalysts. MXene is a 2D material of layered Ti3C2, which is considered to limit electron-hole separation and contribute to photocatalysis. In this work, the etched Ti3C2 MXene was loaded on the surface of ceramic membranes using polydopamine (PDA) as a binder, followed by one-step calcination to produce TiO2 nanoparticles (NPs) in situ. The characterizations supported that the TiO2/Ti3C2 ceramic membranes had high mechanical strength while retaining the layered structure of Ti3C2, which was conducive to the inhibition of electron and hole complexation, improving the photocatalytic performance. Degradation experiments revealed that the material showed enhanced degradation of pharmaceuticals and personal care products (PPCPs) such as ciprofloxacin (CIP), tetracycline (TCN) and ibuprofen (IBP). The LC-MS and toxicity prediction models indicated that the developmental toxicity of CIP degradation products decreased with prolonged photocatalytic reaction, exhibiting no acute toxicity to fish. The MT650 exhibited significantly enhanced water flux properties (320 L/(m2·h)). The TiO2/Ti3C2 ceramic membranes explored in this work are expected to target the treatment of PPCPs with excellent engineering promise.\u0000","PeriodicalId":12720,"journal":{"name":"Frontiers of Environmental Science & Engineering","volume":null,"pages":null},"PeriodicalIF":6.4,"publicationDate":"2024-07-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141779025","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}

引用次数: 0

Emission of greenhouse gases from sewer networks: field assessment and isotopic characterization 下水道网络的温室气体排放：实地评估和同位素特征描述

IF 6.4 2区环境科学与生态学

Frontiers of Environmental Science & Engineering Pub Date : 2024-07-10 DOI: 10.1007/s11783-024-1879-1

Xin Yuan, Xianguo Zhang, Yuqi Yang, Xuan Li, Xin Xing, Jiane Zuo

{"title":"Emission of greenhouse gases from sewer networks: field assessment and isotopic characterization","authors":"Xin Yuan, Xianguo Zhang, Yuqi Yang, Xuan Li, Xin Xing, Jiane Zuo","doi":"10.1007/s11783-024-1879-1","DOIUrl":"https://doi.org/10.1007/s11783-024-1879-1","url":null,"abstract":"Sewer networks play a vital role in sewage collection and transportation, and they are being rapidly expanded. However, the microbial processes occurring within these networks have emerged as significant contributors to greenhouse gas (GHG) emissions. Compared to that from other sectors, our understanding of the magnitude of GHG emissions from sewer networks is currently limited. In this study, we conducted a GHG emission assessment in an independent sewer network located in Beijing, China. The findings revealed annual emissions of 62.3 kg CH4 and 0.753 kg N2O. CH4 emerged as the primary GHG emitted from sewers, accounting for 87.4% of the total GHG emissions. Interestingly, compared with main pipes, branch pipes were responsible for a larger share of GHG emissions, contributing to 76.7% of the total. A GHG emission factor of 0.26 kg CO2-eq/(m·yr) was established to quantify sewer GHG emissions. By examining the isotopic signatures of CO2/CH4 pairs, it was determined that CH4 production in sewers primarily occurred through acetate fermentation. Additionally, the structure of sewer pipes had a significant impact on GHG levels. This study offers valuable insights into the overall GHG emissions associated with sewer networks and sheds light on the mechanisms driving these emissions.\u0000","PeriodicalId":12720,"journal":{"name":"Frontiers of Environmental Science & Engineering","volume":null,"pages":null},"PeriodicalIF":6.4,"publicationDate":"2024-07-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141570551","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}

引用次数: 0