Article
Engineering, Environmental
Yanli Fu, Ying Zhu, Hao Dong, Jing Li, Weiyi Zhang, Yingying Shao, Yanqiu Shao
Summary: This study investigated the effects of Cd and HA on ARGs, MGEs, and bacterial communities in soil. The results showed that the addition of Cd increased the abundance of ARGs and MGEs, while high concentrations of HA suppressed their expression. Available Cd was found to be the dominant factor influencing ARGs, and Proteobacteria were identified as the main host bacteria. Therefore, adding high concentrations of humic acid to Cd-contaminated soil can reduce the enrichment of ARGs.
PROCESS SAFETY AND ENVIRONMENTAL PROTECTION
(2022)
Article
Agricultural Engineering
Yahe Li, Jianan Jiang, Yili Chen, Wandi Qie, Wenrong Zhu, Nianjun Xu, Jianguo Zhao
Summary: The effects of low salinity on sludge performance, microbial community, and functional genes in 4-chlorophenol wastewater treatment were analyzed. It was found that low concentrations of salinity slightly inhibited the removal efficiencies of PO43- -P, NH4+-N, and organics, but stimulated the secretion of EPS. The relative abundances of functional genes encoding proteins increased under NaCl stress, contributing to resistance against NaCl and 4-CP stress. This study provides useful insights into the treatment of low chlorophenols and low salinity in wastewater.
BIORESOURCE TECHNOLOGY
(2023)
Article
Agricultural Engineering
Yu Li, Jing Wang, Bingyan Li, Mengdan Geng, Yan Wang, Jianguo Zhao, Baodan Jin, Yanfei Li
Summary: The presence of CuO NPs influenced the removal of COD and NH4+-N in wastewater treatment, while the addition of HA had a minimal effect. However, HA affected the production of EPS and the microbial community.
BIORESOURCE TECHNOLOGY
(2021)
Article
Environmental Sciences
Yonghui Li, Rong Dong, Jiaxin Guo, Lan Wang, Jianguo Zhao
Summary: This study investigated the effects of Mn2+ and HA on microbial community structures, functional genes, and heavy metal resistance genes in wastewater treatment. The results showed that Mn2+ positively affected genes for nitrogen and phosphorus removal and HMRGs, while HA supplementation decreased the abundance of these genes.
JOURNAL OF ENVIRONMENTAL MANAGEMENT
(2022)
Article
Agricultural Engineering
Zhibin Liu, Xiuping Sun, Zhirong Sun
Summary: This study compared the degradation capacity of an ordinary SBR system and an MMT system for different concentrations of SMX. The results showed that the MMT system exhibited higher stability and degradation capacity compared to the SBR system. The changes in the composition of TB-EPS were likely key to the observed stability of the MMT system.
BIORESOURCE TECHNOLOGY
(2022)
Article
Chemistry, Multidisciplinary
Xiaojia Chen, Yijun Zou, Qinyu Li, Chengjian Wu, Peng Zhou, Zheng Chen, Jiping Shi, Zhijun Zhao
Summary: This study explores the effects of thermophilic bacteria on crude fiber content, carbohydrate-active enzyme genes, and microbial communities during Chinese medicine residues composting. Results demonstrate that thermophilic microbial agents can increase composting temperature, accelerate compost maturation, and promote crude fiber degradation.
Article
Agricultural Engineering
Zeming Ye, Hao Ding, Ziliang Yin, Wenxiang Ping, Jingping Ge
Summary: The study revealed that amoxicillin has significant effects on humic acid formation and bacterial community structure during chicken manure aerobic composting, primarily altering the abundance of bacteria and inhibiting the accumulation of humic acid.
BIORESOURCE TECHNOLOGY
(2021)
Article
Engineering, Environmental
Hong-Ying Chen, Xiang-Kun Li, Lingwei Meng, Gaige Liu, Xiaochen Ma, Chenyu Piao, Ke Wang
Summary: In this study, two parallel-operated EGSB reactors were used to investigate the behavior of antibiotics resistance genes and mobile genetic elements in different environments. Results showed that anaerobic treatment process cannot efficiently reduce ARGs and may increase the risk of ARGs proliferation through the suppression of antibiotics resistance bacteria.
JOURNAL OF HAZARDOUS MATERIALS
(2022)
Article
Environmental Sciences
Lijuan Feng, Changyan Xiao, Yuqin Luo, Yan Qiao, Dongzhi Chen
Summary: The presence of seaweeds improved the removal rates of nitrogen and phosphorus in maricultural wastewater, while the coexistence of seaweeds and OTC had varying impacts on the distribution of diverse antibiotic resistance genes in sediment.
JOURNAL OF ENVIRONMENTAL MANAGEMENT
(2022)
Article
Environmental Sciences
Jannatul Rumky, Antonina Kruglova, Eveliina Repo
Summary: This study collected sludge samples from a local wastewater treatment plant in Finland to analyze the abundance and effectiveness of antibiotic resistance genes (ARGs) before and after ultrasonication treatment. The study found that some ARGs showed a decrease in abundance after ultrasonication, but complete elimination was not achieved. Additionally, the presence of class 1 integron (intl1) was observed as an indicator of antibiotic resistance and horizontal gene transmission.
ENVIRONMENTAL RESEARCH
(2022)
Article
Environmental Sciences
Yi Guo, Dingchang Li, Yongqing Gao, Jingfeng Gao, Shujun Zhang, Fangbo Bao
Summary: Two pilot-scale sequencing batch reactors (SBRs) were established to investigate the effects of different wastewater feeding modes on the formation of aerobic granular sludge (AGS) and the complex relationships between resistance genes and bacteria. The results showed that AGS formed in the reactor with uniform wastewater feeding at the bottom, while the reactor with inlet wastewater flowing directly from the top failed to cultivate AGS. Metagenomic sequencing revealed that the abundance of antibiotic resistance genes (ARGs) increased with the rapid growth of AGS in the bottom-fed reactor, but decreased when the size of AGS was stable. In contrast, the abundance of ARGs continued to elevate in the top-fed reactor, and the abundance of metal resistance genes (MRGs) was always higher than that in the bottom-fed reactor. The two reactors had distinct bacterial communities, with stronger microbial activity and greater potential for proliferation in the bottom-fed reactor. The gene-bacteria relationship of AdeF was the most complex in both systems, potentially undergoing horizontal gene transfer within the bacterial genus. The different feeding modes of wastewater directly affected the size of sludge, leading to variations in the abundance of microbial communities and resistance genes. This study provides valuable insights for the rapid cultivation of AGS and control of resistance genes at pilot-scale.
SCIENCE OF THE TOTAL ENVIRONMENT
(2023)
Article
Microbiology
Sarah Haenelt, Hans-Hermann Richnow, Jochen A. Mueller, Niculina Musat
Summary: The spread of antibiotic resistance genes in aquatic ecosystems, especially in biofilms, is a growing concern. The impact of wastewater treatment plant effluent on the abundance of resistance genes in surface waters has been extensively studied, but the fate of these genes in biofilms and the influence of seasonal parameters are not well understood.
FRONTIERS IN MICROBIOLOGY
(2023)
Article
Infectious Diseases
Alicia Sorgen, James Johnson, Kevin Lambirth, Sandra M. Clinton, Molly Redmond, Anthony Fodor, Cynthia Gibas
Summary: Antibiotic-resistant bacteria are more abundant in raw sewage and water before the biological aeration treatment stage in wastewater treatment plants. While some ARB can still be detected in treated wastewater, they are not enriched relative to upstream effluent-free water, indicating efficient removal during treatment.
Article
Environmental Sciences
Yuqin Luo, Lijuan Feng, Guangfeng Yang, Jun Mu
Summary: This study investigated changes in the microbial community and antibiotic resistance genes in maricultural clam sediment after co-culture with different densities of the seaweed Lava fasciata. Presence of Lava fasciata was found to be associated with changes in total ARGs and specific tetracycline resistance genes, suggesting a potential role of specific microbial hosts in antibiotic resistance gene dynamics.
MARINE POLLUTION BULLETIN
(2021)
Article
Environmental Sciences
Shengnan Li, Jiwei Jiang, Shih-Hsin Ho, Shixuan Zhang, Wenlu Zeng, Fengxiang Li
Summary: Tetracycline (TC) can be rapidly and efficiently degraded in microbial fuel cells (MFCs) due to the synergistic effect of microbial metabolism and electrical stimulation. Different TC concentrations have varying effects on the bioelectric performance of MFCs, with 10 mg/L TC promoting properties such as a maximum power density of 1744.4 +/- 74.9 mW/cm2. The microbial community composition in the MFCs is affected by the initial TC concentration, with Geo-bacter and Chryseobacterium being dominant in the anode biofilm and Azoarcus and Pseudomonas being prominent in the effluent. Furthermore, the presence of TC leads to an increase in the relative abundance of antibiotic resistance genes (ARGs) and mobile genetic elements (MGEs), posing a greater risk of ARGs spreading, and network analysis suggests certain microorganisms and MGEs may serve as potential hosts for multiple ARGs.
Article
Environmental Sciences
Elizabeth Alvarez-Chavez, Stephane Godbout, Mylene Genereux, Caroline Cote, Alain N. Rousseau, Sebastien Fournel
Summary: This study evaluated the effect of alternative filtering materials and bed aeration on the retention of nutrients and fecal bacteria in woodchip bedded stand-off pads for cows. The results showed that the alternative biofilters were more efficient in removing COD, SS, TN, and NO3-N, while conventional biofilters were more efficient for PO4-P removal. Aeration did not have a significant effect under the tested temperature conditions.
JOURNAL OF ENVIRONMENTAL MANAGEMENT
(2024)
Article
Environmental Sciences
Yike Zhang, Zengyi Ma, Zhuoting Fang, Yuandong Qian, Zhiping Huang, Yilong Ye, Jianhua Yan
Summary: This study investigates the application of oxygen enrichment melting technology in the melting of municipal solid waste incineration fly ash. The results demonstrate that oxygen enrichment technology can reduce energy consumption and operating costs, as well as decrease pollution emissions.
JOURNAL OF ENVIRONMENTAL MANAGEMENT
(2024)
Article
Environmental Sciences
Liangang Xiao, Mingkai Leng, Philip Greenwood, Rongqin Zhao, Zhixiang Xie, Zengtao You, Junguo Liu
Summary: This study investigates the effects of grazing exclusion on soil organic carbon (SOC) accumulation and vegetation recovery. It finds that grazing exclusion can increase the potential for SOC accumulation, and higher annual precipitation is positively correlated with SOC accumulation.
JOURNAL OF ENVIRONMENTAL MANAGEMENT
(2024)
Article
Environmental Sciences
Beatrice Cantoni, Jessica Ianes, Beatrice Bertolo, Selena Ziccardi, Francesco Maffini, Manuela Antonelli
Summary: This study evaluates the performance of ozonation and adsorption as in-series processes compared to standalone processes for the removal of Contaminants of Emerging Concern (CECs) in drinking water. The combination of both processes proves to be more effective than adsorption and ozonation alone. Ozonation improves the adsorption performance of poorly-oxidizable CECs but worsens that of well-oxidizable compounds. This research highlights the importance of considering both processes in the removal of CECs in drinking water treatment plants.
JOURNAL OF ENVIRONMENTAL MANAGEMENT
(2024)
Article
Environmental Sciences
Dan Li, Bingjun Liu, Yang Lu, Jianyu Fu
Summary: A new Standardized compound Drought and Saltwater intrusion Index (SDSI) was developed to detect changes in the severity of CDSEs in six estuaries. The study found that saltwater intrusion plays a dominant role in influencing SDSI severity, and CDSEs vary in frequency, duration and severity among different estuaries.
JOURNAL OF ENVIRONMENTAL MANAGEMENT
(2024)
Article
Environmental Sciences
Yong-Qiang Li, Rui Sun, Chong-Miao Zhang, Zi-Xuan Liu, Rui-tao Chen, Jian Zhao, Hua-dong Gu, Huan-Cai Yin
Summary: In this study, an electron beam excitation multi-wavelength ultraviolet (EBE-MW-UV) system was established and found to have significantly higher microbial inactivation effects compared to single-wavelength UV-LEDs in water. Mechanism analysis revealed that EBE-MW-UV damaged microbial DNA and proteins, and generated additional reactive oxygen species, leading to microbial inactivation.
JOURNAL OF ENVIRONMENTAL MANAGEMENT
(2024)
Article
Environmental Sciences
Kaili Ma, Xinxin Han, Qiujuan Li, Yu Kong, Qiaoli Liu, Xu Yan, Yahong Luo, Xiaopin Li, Huiyang Wen, Zhiguo Cao
Summary: This study reveals that the use of a tryptophan-degrading microbial consortium (TDC) can enhance the hydrolysis efficiency of waste activated sludge (WAS), increasing the yield and quality of short chain fatty acids (SCFAs) and improving the solubilization and release of organic substances from WAS.
JOURNAL OF ENVIRONMENTAL MANAGEMENT
(2024)
Article
Environmental Sciences
Ling Xiong, Rui Li
Summary: Incorporating Ecosystem Service Value (ESV) into land use planning can provide informed land management decisions. This study evaluates the ESV of Guizhou Province in China's karst region. The results show an increase in total ESV over the past two decades due to ecological restoration projects.
JOURNAL OF ENVIRONMENTAL MANAGEMENT
(2024)
Article
Environmental Sciences
M. Geetha Jenifel
Summary: This article discusses the importance of water and the pollution of freshwater resources, and introduces the use of machine learning models and blockchain technology to predict and protect water quality.
JOURNAL OF ENVIRONMENTAL MANAGEMENT
(2024)
Article
Environmental Sciences
Stanslaus Terengia Materu, Taotao Chen, Chang Liu, Daocai Chi, Meng Jun
Summary: The study showed that H2SO4-modified biochar can reduce P leaching, increase soil available P, and enhance plant P uptake in alternate wetting and drying irrigation systems. Biochar additions B20A and IAWDB20A-M were effective in improving yield, reducing P leaching, and increasing APB.
JOURNAL OF ENVIRONMENTAL MANAGEMENT
(2024)
Article
Environmental Sciences
Amir Nouri, Ali Akbar Zinatizadeh, Sirus Zinadini, Mark Van Loosdrecht
Summary: This study focuses on the development of an air-lift bio-electrochemical reactor (ALBER) with a continuous feeding regime to enhance nitrogen removal from synthetic wastewater. The effect of temperature, hydraulic retention time (HRT), N -NH+4 /TN ratio, and current density on the reactor performance was investigated, and the ALBER achieved a maximum TN removal of 73%. The results suggest that the ALBER has potential for treating industrial wastewater at low temperatures.
JOURNAL OF ENVIRONMENTAL MANAGEMENT
(2024)
Article
Environmental Sciences
Peifang Wang, Guoxiang You, Yang Gao, Juan Chen, Xun Wang, Chao Wang
Summary: This study investigated the ecological processes of microbial communities and N- and P-transformation processes in multistage agricultural drainage ditches. The results showed that the microbial communities were co-shaped by agricultural practices and ditch size, which further governed the N and P removal performance.
JOURNAL OF ENVIRONMENTAL MANAGEMENT
(2024)
Article
Environmental Sciences
Xiaofeng Niu, Huan Wang, Tao Wang, Peiyu Zhang, Huan Zhang, Hongxia Wang, Xianghong Kong, Songguang Xie, Jun Xu
Summary: Microorganisms play a critical role in maintaining ecosystem balance, and environmental stressors can affect the assembly processes of microbial communities. The study found that different stressors have opposite effects on microbial community assembly in water and sediment, and warming has different influences compared to herbicides and nutrients.
JOURNAL OF ENVIRONMENTAL MANAGEMENT
(2024)
Article
Environmental Sciences
Yuqing Tan, Qiming Cheng, Fengwei Lyu, Fei Liu, Linhao Liu, Yihong Su, Shaochun Yuan, Wenyu Xiao, Zhen Liu, Yao Chen
Summary: The exacerbation of global warming, extreme weather events, and rapid urbanization have led to increased flooding in urban areas. China has adopted sponge city as an efficient means of preventing and controlling urban floods. Using a SWMM-FVCOM model, the hydrological reduction and control effect of sponge city construction (SPCC) within a university campus were evaluated. The study found that implementing SPCC effectively mitigates surface runoff and reduces the severity of urban flooding. However, the efficacy of runoff control decreases with longer rainfall return periods.
JOURNAL OF ENVIRONMENTAL MANAGEMENT
(2024)
Article
Environmental Sciences
Zhonghan Chen, Qiuyan Li, Shibo Yan, Juan Xu, Qiaoyun Lin, Zhuangming Zhao, Ziying He
Summary: Tidal rivers are important biochemical reaction channels, receiving carbon from wastewater and agricultural drains, affecting CO2 emissions. Through modeling and data analysis, researchers explored carbon distribution, emissions, and greenhouse effects, emphasizing the potential of river management to change global CO2 emissions under climate change.
JOURNAL OF ENVIRONMENTAL MANAGEMENT
(2024)