Article
Engineering, Environmental
Ting Li, XiaoJun Zuo, SongHu Zhang, QingGang Kong
Summary: This study investigated the use of 365 nm ultraviolet light-emitting diode (UVA/LED) to control antibiotic resistant bacteria (ARB) in stormwater runoff. The results showed that UVA/LED irradiation effectively reduced ARB levels, and the inactivation efficiency was influenced by light intensity and suspended solid (SS) concentration. Initial pH had minimal impact on ARB inactivation. Additionally, the study found that after UVA/LED irradiation, ARB was hardly detected during a 12-hour dark repair period, and the transfer frequency of kanamycin resistance gene increased.
WATER SCIENCE AND TECHNOLOGY
(2022)
Article
Engineering, Chemical
Ruiying Song, Hu Li, Zhao Kang, Rongwei Zhong, Yangyang Wang, Ying Zhang, Guangzhou Qu, Tiecheng Wang
Summary: The study showed that surface plasma technology can effectively inactivate antibiotic-resistant bacteria (AR E. coli) and reduce the levels of associated antibiotic resistance genes (ARGs) in water. The technology works by damaging cell membranes, disrupting biological processes, altering protein structures, and causing DNA damage to achieve bacterial inactivation, as well as inhibiting the horizontal transfer of resistance genes.
SEPARATION AND PURIFICATION TECHNOLOGY
(2021)
Article
Engineering, Chemical
Hu Li, Ruiying Song, Yangyang Wang, Rongwei Zhong, Ying Zhang, Jian Zhou, Tiecheng Wang, Lingyan Zhu
Summary: The presence of NO3-, Cu2+, and Fe2+ promoted inactivation of AR E. coli, reduction of ARGs, and lowered antibiotic resistance. On the other hand, CO32- inhibited these processes, and SO42- had no distinct effect. Fe2+ significantly enhanced (OH)-O-center dot formation during plasma treatment.
SEPARATION AND PURIFICATION TECHNOLOGY
(2022)
Article
Engineering, Environmental
Leonardo Romero-Martinez, Paola Duque-Sarango, Claudia Gonzalez-Martin, Javier Moreno-Andres, Asuncion Acevedo-Merino, Enrique Nebot
Summary: Treatment with UV light is commonly used to deactivate waterborne organisms. In this study, the UV resistance and reactivation degree of different strains of E. coli and E. faecalis were evaluated and compared using LEDs with an emission range of 265-285 nm. The results showed that the intraspecific differences between E. coli strains were greater than the interspecific differences with respect to E. faecalis in terms of UV resistance and repairing potential. The UV doses required for a four log-reduction ranged from 10.2 to 16.3 mJ cm(-2) for E. coli and from 11.1 to 11.4 mJ cm(-2) for E. faecalis. Dark repair was not observed within 24 hours, and photorepair depended on the bacterial strain and the applied UV dose. The exposed organisms required an increased UV dose of 18-160% to achieve a four log-reduction compared to unexposed organisms.
JOURNAL OF WATER PROCESS ENGINEERING
(2023)
Review
Microbiology
Siavash Iravani
Summary: Photocatalysis utilizing sunlight for various chemical reactions has gained attention for applications such as water splitting, organic pollutant degradation, and water disinfection. Nanophotocatalysts offer advantages of high efficiency, eco-friendliness, and cost-effectiveness, but face limitations in industrial and commercial applications that require comprehensive research and solutions.
CRITICAL REVIEWS IN MICROBIOLOGY
(2022)
Article
Environmental Sciences
Shuheng Hu, Yuhang Fu, Muen Xue, Yan Lan, Wenhao Xi, Zimu Xu, Wei Han, Danzhou Wu, Cheng Cheng
Summary: In this study, dielectric barrier discharge (DBD) plasma was used to inactivate antibiotic-resistant Escherichia coli (AR E. coli) and simultaneously remove antibiotic resistance genes (ARGs). Within 15 s of plasma treatment, 97.9% of AR E. coli were inactivated. The rupture of the bacterial cell membrane and the increase of intracellular ROS were identified as the main reasons for the rapid inactivation of bacteria. After 15 min of plasma treatment, the proportion of intracellular ARGs decreased significantly. In the first 5 min of discharge, the proportion of extracellular ARGs also decreased significantly. ESR and quenching experiments showed that ·OH and O-1(2) played important roles in the removal of ARGs. This study demonstrates that DBD plasma is an effective technique for controlling antibiotic-resistant bacteria and antibiotic resistance genes in waters.
ENVIRONMENTAL RESEARCH
(2023)
Article
Environmental Sciences
Li Liang, Guosheng Zhang, Xuening Dai, Weiying Li
Summary: This study investigated the performance of sulfidated nanoscale zerovalent iron (S-nZVI)/periodate (PI) system in inactivating antibiotic resistant bacteria (ARB) and removing antibiotic resistance genes (ARGs). The results showed that the S-nZVI/PI system could completely inactivate kanamycin, ampicillin, and tetracycline-resistant E.coli HB101 within 40 minutes, and also remove the intracellular ARGs carried by E.coli HB101. The study also examined the effects of PI and S-nZVI dosage, initial concentration of E.coli HB101, and co-existing substances on the disinfection and removal process.
ENVIRONMENTAL RESEARCH
(2023)
Article
Environmental Sciences
J. Perez, R. Alvarez-Arroyo, J. Arrieta, J. M. Suescun, S. Paunero, M. A. Gomez
Summary: The characteristics of the NerviOn river water were found to be variable throughout the year, heavily influenced by rainfall, but suitable for drinking water production. Antibiotic resistant bacteria isolated from the river water were particularly resistant to certain antibiotics, with multi-resistant strains more abundant in summer and single resistant strains more abundant in winter.
Article
Optics
Nadezhda Ignatova, Tatiana Ivanova, Artem Antonyan, Ivan Budruev, Olga Streltsova, Vadim Elagin, Vladislav Kamensky
Summary: PDI is considered an effective method for preventing postoperative complications of urolithiasis. This study demonstrates the application of PDI in dealing with drug-resistant bacterial strains associated with renal calculi and selecting optimal exposure modes for different bacteria. Antibiotic-resistant bacteria were predominant in urinary tract infection samples, and exposure modes with maximal bactericidal activity were chosen for certain bacterial strains.
Article
Engineering, Environmental
Gabriela A. Ortega-Moreno, Saidy C. Ayala-Duran, Bibiana P. Barbero, Griselda E. Narda, Maria C. Bernini, Raquel F. Pupo Nogueira
Summary: The MOF MIL-53(Fe) was successfully synthesized, activated, and evaluated as a catalyst in the photo-Fenton reactions for degrading sulfamethoxazole (SMX) using UVA LED irradiation and natural sunlight. The study found that the use of MIL-53(Fe) as a heterogeneous catalyst enabled the degradation of 96% of SMX in 120 minutes under near-neutral conditions, achieving a removal of 30% of dissolved organic carbon (DOC). The leached iron concentration was within the quality standard for drinking water. The efficiency and stability of the catalyst after multiple cycles make it a potential candidate for alternative water purification systems based on the photo-Fenton process.
JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING
(2022)
Article
Environmental Sciences
Wendy B. Morgado-Gamero, Alexander Parody, Jhorma Medina, Laura A. Rodriguez-Villamizar, Dayana Agudelo-Castaneda
Summary: This study revealed the presence of multi-antibiotic resistant bacterial bioaerosols emitted by a landfill and the surrounding area, highlighting the potential impact of bacterial bioaerosols on public health. The findings suggest the high concentrations of antibiotic-resistant bacteria in bioaerosols, especially for fine particles, which pose a threat to human health. Additionally, there is a concern about the possible spread of antibiotic multi-resistance genes in the environment due to interchange between pathogenic and non-pathogenic species in landfill facilities.
ENVIRONMENTAL POLLUTION
(2021)
Review
Public, Environmental & Occupational Health
Guojun Sun, Qian Zhang, Zuojun Dong, Dashun Dong, Hui Fang, Chaojun Wang, Yichen Dong, Jiezhou Wu, Xuanzhe Tan, Peiyao Zhu, Yuehua Wan
Summary: This paper reviewed research on antibiotic-resistant bacteria (ARB) from 2010 to 2020 using bibliometrics. The analysis provided insights into the countries, institutions, journals, authors, research areas, and research trends in the field. The findings revealed an increasing number of studies over the years, with the USA and China being the most active research countries and environmental sciences and ecology being the most popular research areas.
FRONTIERS IN PUBLIC HEALTH
(2022)
Article
Environmental Sciences
Martha I. Verbel-Olarte, Efraim A. Serna-Galvis, Lorena Salazar-Ospina, J. Natalia Jimenez, Jazmin Porras, Cesar Pulgarin, Ricardo A. Torres-Palma
Summary: Carbapenem-resistant Klebsiella pneumoniae is classified as a critical priority pathogen by the World Health Organization. Effluents from municipal wastewater treatment plants may contribute to the dissemination of K. pneumoniae. In this study, photo-electro-oxidation (PEO) and photo-electro-Fenton (PEF) processes were found to be effective in inactivating K. pneumoniae in simulated EWWTP, with PEO achieving faster inactivation and PEF showing stronger degrading action on the resistance gene.
SCIENCE OF THE TOTAL ENVIRONMENT
(2021)
Article
Environmental Sciences
Weixiao Zhang, Ruipin Huang, Tao Zhang, Baolong Wang, Na Li, Yan Sun, He Ma, Qian Zhang, Junxin Zhang, Ying Liu
Summary: This study aimed to investigate the efficacy of UVC-LED on pathogenic bacteria and the factors influencing bacterial reactivation. The results showed that UVC-LED effectively inactivated bacteria, and the inactivation rate increased with increasing UVC-LED fluence. Adequate UVC-LED irradiation and avoidance of visible light after disinfection can effectively inhibit bacterial reactivation. The findings provide reference for UV disinfection in aquaculture.
FRONTIERS IN MARINE SCIENCE
(2023)
Article
Environmental Sciences
Xiaojie Xu, Min Yang, Yunhan Jiang, Ningyao Tao, Yulong Fu, Jiahui Fan, Xin Xu, Huixiang Shi, Zhan Lu, Chaofeng Shen
Summary: The spread of antibiotic resistant pathogens and antibiotic resistance genes in the environment is a serious threat to public health. Existing methods are ineffective in removing them, but a new acridine-based photosensitizer called YM-3 has been developed in this study, which can effectively inactivate antibiotic resistant pathogens and reduce antibiotic resistance genes by generating singlet oxygen. YM-3 has shown a high inactivation rate for methicillin-resistant Staphylococcus aureus and carbapenem-resistant Acinetobacter baumannii, and it can effectively reduce the copy numbers of antibiotic resistance genes in these bacteria. It also has a long-lasting bactericidal effect, making it suitable for disinfection in various environments.
ENVIRONMENT INTERNATIONAL
(2023)
Article
Engineering, Environmental
Rong-Gui Zhu, Chang-Gui Pan, Feng-Jiao Peng, Chao-Yang Zhou, Jun-Jie Hu, Kefu Yu
Summary: This comprehensive survey investigated the occurrence, bioaccumulation, and trophic magnification of parabens and their metabolite 4-HB in a marine food web. Results showed that parabens were the predominant pollutants in marine organisms, with significant bioaccumulation from sediments. The estimated trophic magnification factor indicated biomagnification for MeP and trophic dilution for 4-HB. Overall, the risks for humans consuming marine organisms were found to be low.
Article
Engineering, Environmental
Andres F. Torres-Franco, Deborah Leroy-Freitas, Cristina Martinez-Fraile, Elisa Rodriguez, Pedro A. Garcia-Encina, Raul Munoz
Summary: Anaerobic and microalgae-based technologies have emerged as sustainable alternatives for municipal wastewater treatment. However, the presence of viruses in the treated wastewater is a major concern for reuse applications. This study assessed the ability of these technologies to reduce viruses during secondary wastewater treatment. The results showed that all technologies were effective in reducing the concentration of viruses, with microalgae-based treatment exhibiting the highest potential for reducing the disinfection requirements of treated wastewater.
Article
Engineering, Environmental
Young Gwang Kim, Sae Yun Kwon, Spencer J. Washburn, Scott C. Brooks, Ji Won Yoon, Lucien Besnard
Summary: The study uses Hg isotope ratios to identify the sources and exposure pathways of mercury in bivalves, finding that dissolved Hg phases in the water column are the primary source and exposure pathway to bivalves. This provides new insights into using bivalves as bioindicators for sediment quality monitoring.
Article
Engineering, Environmental
Hui Geng, Ying Xu, Rui Liu, Dianhai Yang, Xiaohu Dai
Summary: This study investigates the effect of cation exchange resin (CER) on the sequential recovery of hydrogen and methane from anaerobic digestion (AD) and the corresponding mechanisms. The results show that CER can simultaneously enhance the production of hydrogen and methane by promoting the solubilisation, hydrolysis, and acidification of organic matter. Additionally, CER facilitates effective contact between bacteria and organic particulates and reduces the energy barrier for mass transfer during methane production. The study also reveals changes in the microbial community structure and metagenomics during the AD process.
Article
Engineering, Environmental
Xiaojing Lin, Zhan Jin, Shunfeng Jiang, Zhiquan Wang, Suqing Wu, Ke Bei, Min Zhao, Xiangyong Zheng
Summary: Dehumidification combined with addition of absorbent resin supplement (ARS) was used to achieve rapid evaporation of non-pretreated urine, resulting in high water evaporation efficiency and nutrient recovery.
Article
Engineering, Environmental
Yangli Che, Chaoran Lin, Shen Li, Jiao Liu, Longhai Zhu, Shilei Yu, Nan Wang, Haoshuai Li, Mutai Bao, Yang Zhou, Tonghao Si, Rui Bao
Summary: Hydrodynamic processes play a crucial role in the transmission of sediments, microbial assembly, and organic carbon redistribution in the ocean. Through experiments and analysis, we found that hydrodynamics shape the assembly of microbial communities and control the redistribution of different sourced organic carbon, thereby influencing microbial-mediated biogeochemical transformation.
Article
Engineering, Environmental
Chao Chen, Yu Yang, Nigel J. D. Graham, Zhenyu Li, Xingtao Yang, Zhining Wang, Nadia Farhat, Johannes S. Vrouwenvelder, Li -an Hou
Summary: The fouling of seawater reverse osmosis membranes is a persistent challenge in desalination. This study monitored the operational performance of a desalination plant for 7 years and the fouling development in different areas of membrane modules. The findings showed that operational performance declined over time and fouling mainly occurred at the feed side of the modules, with the highest microbial diversity. Keystone species like Chloroflexi and Planctomycetes played an important role in maintaining community structure and biofilm maturation. Polysaccharides, soluble microbial products, marine humic acid-like substances, and inorganic substances contributed to fouling. Overall, biofouling had a significant impact on membrane fouling after 7 years of operation.
Article
Engineering, Environmental
Dan Li, Jieyi Sun, Yibo Fu, Wentao Hong, Heli Wang, Qian Yang, Junhong Wu, Sen Yang, Jianhui Xu, Yunfei Zhang, Yirong Deng, Yin Zhong, Ping'an Peng
Summary: Sulfidation-oxidation treatment of magnetite (Fe3O4) enhances the production of dark center dot OH, which can efficiently degrade dissolved organic matter (DOM) and accelerate carbon cycling.
Article
Engineering, Environmental
Cheng Yu, Kaijun Wang, Kaiyuan Zhang, Ruiyang Liu, Pingping Zheng
Summary: This study implemented a microaerobic-aerobic configuration in a full-scale municipal wastewater treatment facility and investigated the effects on sludge characteristics, pollutant removal, microbial community, and granulation mechanisms. The results showed successful transition from flocculent-activated sludge to well-defined AGS after two months of operation. The primary pathways for pollutant removal were simultaneous nitrification, denitrification, and phosphorus removal. Moreover, the incorporation of internal separators induced shifts in the flow pattern, which promoted granulation.
Article
Engineering, Environmental
Zhe Zhang, Shaoyang Hu, Guangrong Sun, Wei Wang
Summary: Halogenated aromatic disinfection byproducts (DBPs), such as halogenated phenols, have garnered widespread attention due to their high toxicity and prevalence. This study reports on the analysis, occurrence, and cytotoxicity of a group of emerging halogenated aromatic DBPs, known as halogenated polyhydroxyphenols (HPPs), in drinking water.
Article
Engineering, Environmental
Shengyue Chen, Jinliang Huang, Peng Wang, Xi Tang, Zhenyu Zhang
Summary: Accurate prediction of river water quality is crucial for sustainable water management. This study introduces wavelet analysis and transfer learning techniques to assist LSTM modeling, proposing a newly coupled modeling approach that improves short-term prediction of river water quality.
Article
Engineering, Environmental
Bang Du, Xinmin Zhan, Piet N. L. Lens, Yifeng Zhang, Guangxue Wu
Summary: Efficient anaerobic digestion relies on the cooperation of different microorganisms with different metabolic pathways. This study investigated the effects of different operational modes and the addition of powdered activated carbon (PAC) on ethanol metabolic pathways. The results showed that the SBR mode and the presence of CO2 facilitated ethanol metabolism towards propionate production, while the CFR mode with extended solids retention time enriched Geobacter. Adjusting operational modes and PAC addition can modulate anaerobic ethanol metabolism and enrich Geobacter.
Article
Engineering, Environmental
Wanfa Wang, Si-Liang Li, Jun Zhong, Yuanbi Yi, Fujun Yue, Zenglei Han, Qixin Wu, Ding He, Cong-Qiang Liu
Summary: This study compares the carbon biogeochemical processes in karst and non-karst regions within large thermal stratified river-reservoir systems. The results demonstrate that karst reservoirs have a reduced potential for carbon emissions and highlight the importance of considering geologic settings to improve accuracy in regional and global CO2 emission estimates.
Article
Engineering, Environmental
Chunxia Jiang, Zelong Zhao, Dong Zhu, Xiong Pan, Yuyi Yang
Summary: This study analyzed the occurrence and distribution of antibiotic resistance genes (ARGs) in different environmental media of the Yangtze River using metagenomics. Core resistome dominated by multidrug resistance genes was found in all samples, while rare resistome dominated by various resistance genes was more prevalent in plasmids. Specific bacteria were identified as hosts for both core and rare resistomes, with high clinical concern ARGs found in the rare resistome. Particle-associated environment provided the most ideal conditions for resistome hosts. This study provided insights into the genetic locations of ARGs and the community assembly mechanisms of ARG hosts in freshwater environments.
Article
Engineering, Environmental
Yu Zhang, Yongtao He, Linchun Jia, Lei Xu, Zheng Wang, Yueling He, Ling Xiong, Xumeng Lin, Hong Chen, Gang Xue
Summary: By synergizing organic carbon source, thiosulfate, and zero-valent iron, efficient mixotrophic denitrification of oligotrophic secondary effluent can be achieved. Thiosulfate plays a vital role in promoting TN removal efficiency, while corrosion of Fe0 releases OH- to neutralize H+ from thiosulfate-driven denitrification, creating a suitable environment for denitrification. The coordination of thiosulfate and Fe0 maintains the dominance of Thiobacillus for denitrification.