1
|
Chen M, Niu Z, Zhang X, Zhang Y. Pollution characteristics and health risk of sixty-five organics in one drinking water system: PAEs should be prioritized for control. CHEMOSPHERE 2024; 350:141171. [PMID: 38211786 DOI: 10.1016/j.chemosphere.2024.141171] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/12/2023] [Revised: 01/05/2024] [Accepted: 01/08/2024] [Indexed: 01/13/2024]
Abstract
Currently, a large number of emerging organic contaminants have been detected in domestic and international drinking water systems. However, there are differences among the research methods, which lead to system errors in directly comparing the hazards of different contaminants, so it is difficult to analyze the priority control pollutants and the risk control target in drinking water from previous studies. Therefore, we selected a drinking water treatment plant (DWTP) in the east of China, and detected trihalomethanes (THMs), antibiotics, phthalate esters (PAEs), organophosphate esters (OPEs), per and polyfluoroalkyl substances (PFASs), a total of sixty-five organic contaminants in one batch water sample of four seasons, and carried out the whole process monitoring of "Source water-DWTP-Network-Users", and calculated the health risks of contaminants in tap water. The results showed that DWTP could effectively remove antibiotics and PAEs; the removal rate of coagulation for antibiotics can be up to 47%; the release of PAEs in the plastic water supply pipe leads to a significant increase of the concentrations in the water transportation system, which can reach 2.92 times of that in finished water; compared with other contaminants, THMs and PAEs in tap water have higher health risks. This study reveals that THMs and PAEs are priority control organic pollutants, and the water supply network is the key risk control target in the drinking water system, providing a theoretical basis for how to ensure the safety of drinking water.
Collapse
Affiliation(s)
- Mingyu Chen
- School of Environmental Science and Engineering, Tianjin University, Tianjin, 300350, China
| | - Zhiguang Niu
- School of Environmental Science and Engineering, Tianjin University, Tianjin, 300350, China; The International Joint Institute of Tianjin University, Fuzhou, 350207, China
| | - Xiaohan Zhang
- School of Environmental Science and Engineering, Tianjin University, Tianjin, 300350, China
| | - Ying Zhang
- School of Environmental Science and Engineering, Tianjin University, Tianjin, 300350, China.
| |
Collapse
|
2
|
Wolf-Baca M, Siedlecka A. Seasonal and spatial variations of antibiotic resistance genes and bacterial biodiversity in biofilms covering the equipment at successive stages of drinking water purification. JOURNAL OF HAZARDOUS MATERIALS 2023; 456:131660. [PMID: 37210784 DOI: 10.1016/j.jhazmat.2023.131660] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/13/2023] [Revised: 04/21/2023] [Accepted: 05/16/2023] [Indexed: 05/23/2023]
Abstract
The presence of ARGs (antibiotic resistance genes) in the aquatic environment is a serious threat to public health especially in environmental biofilms as natural reservoirs of ARGs in water treatment plants (WTP). It has been shown that the treatment technology and source of water have a significant impact on the abundance and type of genes determining antibiotic resistance. The following indicator genes were proposed that should absolutely be controlled in environmental biofilms: intl1, sul2, sul1, tetA, blaOXA, and blaTEM. In both studied WTPs, the highest number of copies was determined for the intI1 gene. Among the tested ARGs, the highest values were obtained for genes sul1 and tetA. The qPCR analysis also revealed that the amounts of determined ARGs decreased in the following order: sulphonamides>carbapenems >tetracyclines > β-lactams >macrolides. The dominant bacterial types in all analysed samples were Proteobacteria and Bacteroidetes. Both ARGs and bacterial biodiversity was determined rather by sampling site (spatial variation) than seasonality. The obtained results show that biofilms are reservoirs of ARGs. This may affect the microbiological quality of water entering the water system. It is therefore necessary to include their analysis in the classical studies of water quality.
Collapse
Affiliation(s)
- Mirela Wolf-Baca
- Department of Environmental Protection Engineering, Faculty of Environmental Engineering, Wrocław University of Science and Technology, Wyb. Wyspiańskiego 27, 50-370 Wrocław, Poland.
| | - Agata Siedlecka
- Department of Applied Bioeconomy, Wrocław University of Environmental and Life Sciences, Norwida 25, 50-375 Wrocław, Poland
| |
Collapse
|
3
|
Li C, Zhu B, Zhao X, Wang Y, Weng J, Liu F, Zhao R, Lu J, Shang Y. Enhanced treatment effect and universality of novel ARAO coupling process on municipal sewage: a pilot study. Biochem Eng J 2022. [DOI: 10.1016/j.bej.2022.108776] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
|
4
|
Lin H, Hou Q, Luo Y, Hu G, Yu J, Yu R. Reutilization of waste oyster shell as filler for filter for drinking water pretreatment: Feasibility and implication. JOURNAL OF ENVIRONMENTAL MANAGEMENT 2022; 315:115142. [PMID: 35500484 DOI: 10.1016/j.jenvman.2022.115142] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/22/2021] [Revised: 04/09/2022] [Accepted: 04/20/2022] [Indexed: 06/14/2023]
Abstract
Oyster shell (OS) is a kind of reusable resource that can serve as carbon source, biofilms carrier and basifying agent, suggesting it is an attractive filler option for biofiltration, but studies on its application in drinking water treatment are limited. In this study, one pilot-scale up-flow filter filled with OS media were designed to pretreat surface source water. Filter performance and biological functions were investigated to determine its application scope. The results showed that effluent pH increased and was stable around 7.5 due to the alkalinity provided by OS and its buffering capacity. High and stable removal efficiencies of turbidity (mostly >60%) were achieved. The removal efficiencies of NH4+-N changed in a wide range (mostly <30%). TOC and UV254 removal rate was low (<10%). The biofilms formation period took about 45 days. During this period, this filter mainly removed pollutants through adsorption by OS. High-throughput sequencing results showed that functional taxa did not play a key role after adsorption saturation in early operation period. Functional microbial taxa formed on the OS surface after long-term operation and NH4+-N removal rate increased to some extent. Our results suggested that unburned OS filter can be used as rough filter for turbidity removal instead of coagulation and sedimentation process. Preoxidation, calcination of OS, mixed with other filler and are recommended to improve the performance if it would be used for biofiltration. This study provides an insight for the reuse of OS in drinking water treatment.
Collapse
Affiliation(s)
- Huirong Lin
- College of Chemical Engineering, Huaqiao University, Xiamen, 361021, China; Institute of Environmental and Ecological Engineering, Huaqiao University, Xiamen 361021, China
| | - Quanyang Hou
- College of Chemical Engineering, Huaqiao University, Xiamen, 361021, China; Institute of Environmental and Ecological Engineering, Huaqiao University, Xiamen 361021, China
| | - Yang Luo
- Third Institute of Oceanography, Ministry of Natural Resources, Xiamen 361005, China
| | - Gongren Hu
- College of Chemical Engineering, Huaqiao University, Xiamen, 361021, China; Key Laboratory of Environmental Monitoring of University in Fujian Province, Xiamen 361024, China
| | | | - Ruilian Yu
- College of Chemical Engineering, Huaqiao University, Xiamen, 361021, China; Institute of Environmental and Ecological Engineering, Huaqiao University, Xiamen 361021, China.
| |
Collapse
|
5
|
Cheng Q, Call DF. Developing microbial communities containing a high abundance of exoelectrogenic microorganisms using activated carbon granules. THE SCIENCE OF THE TOTAL ENVIRONMENT 2021; 768:144361. [PMID: 33736328 DOI: 10.1016/j.scitotenv.2020.144361] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/06/2020] [Revised: 11/30/2020] [Accepted: 12/01/2020] [Indexed: 06/12/2023]
Abstract
Microorganisms that can transfer electrons outside their cells are useful in a range of wastewater treatment and remediation technologies. Conventional methods of enriching exoelectrogens are cost-prohibitive (e.g., controlled-potential electrodes) or lack specificity (e.g., soluble electron acceptors). In this study a low-cost and simple approach to enrich exoelectrogens from a mixed microbial inoculum was investigated. After the method was validated using the exoelectrogen Geobacter sulfurreducens, microorganisms from a pilot-scale biological activated carbon (BAC) filter were subjected to incubations in which acetate was provided as the electron donor and granular activated carbon (GAC) as the electron acceptor. The BAC-derived community oxidized acetate and reduced GAC at a capacity of 1.0 mmol e- (g GAC)-1. After three transfers to new bottles, acetate oxidation rates increased 4.3-fold, and microbial morphologies and GAC surface coverage became homogenous. Although present at <0.01% in the inoculum, Geobacter species were significantly enriched in the incubations (up to 96% abundance), suggesting they were responsible for reducing the GAC. The ability to quickly and effectively develop an exoelectrogenic microbial community using GAC may help initiate and/or maintain environmental systems that benefit from the unique metabolic capabilities of these microorganisms.
Collapse
Affiliation(s)
- Qiwen Cheng
- Department of Civil, Construction, and Environmental Engineering, North Carolina State University, 2501 Stinson Drive, Raleigh, NC 27695-7908, United States
| | - Douglas F Call
- Department of Civil, Construction, and Environmental Engineering, North Carolina State University, 2501 Stinson Drive, Raleigh, NC 27695-7908, United States.
| |
Collapse
|
6
|
Shi Y, Zhang Z, Zhang M, Ding G, Zhao B, Wang L, Zhang H. Biological membrane fouling control with the integrated and separated processes of MIEX and UF. Sep Purif Technol 2021. [DOI: 10.1016/j.seppur.2020.118151] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
|
7
|
Ma X, Li G, Chen R, Yu Y, Tao H, Zhang G, Shi B. Revealing the changes of bacterial community from water source to consumers tap: A full-scale investigation in eastern city of China. J Environ Sci (China) 2020; 87:331-340. [PMID: 31791506 DOI: 10.1016/j.jes.2019.07.017] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/20/2019] [Revised: 07/23/2019] [Accepted: 07/24/2019] [Indexed: 06/10/2023]
Abstract
This study profiled the bacterial community variations of water from four water treatment systems, including coagulation, sedimentation, sand filtration, ozonation-biological activated carbon filtration (O3-BAC), disinfection, and the tap water after the distribution process in eastern China. The results showed that different water treatment processes affected the bacterial community structure in different ways. The traditional treatment processes, including coagulation, sedimentation and sand filtration, reduced the total bacterial count, while they had little effect on the bacterial community structure in the treated water (before disinfection). Compared to the traditional treatment process, O3-BAC reduced the relative abundance of Sphingomonas in the finished water. In addition, ozonation may play a role in reducing the relative abundance of Mycobacterium. NaClO and ClO2 had different effects on the bacterial community in the finished water. The relative abundance of some bacteria (e.g. Flavobacterium, Phreatobacter and Porphyrobacter) increased in the finished water after ClO2 disinfection. The relative abundance of Mycobacterium and Legionella, which have been widely reported as waterborne opportunistic pathogens, increased after NaClO disinfection. In addition, some microorganisms proliferated and grew in the distribution system, which could lead to turbidity increases in the tap water. Compared to those in the finished water, the relative abundance of Sphingomonas, Hyphomicrobium, Phreatobacter, Rheinheimera, Pseudomonas and Acinetobacter increased in the tap water disinfected with NaClO, while the relative abundance of Mycobacterium increased in the tap water disinfected with ClO2. Overall, this study provided the detailed variation in the bacterial community in the drinking water system.
Collapse
Affiliation(s)
- Xu Ma
- School of Environment & Natural Resource, Renmin University of China, Beijing 100872, China
| | - Guiwei Li
- Key Laboratory of Drinking Water Science and Technology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China; University of Chinese Academy of Sciences, Beijing 100049, China
| | - Ruya Chen
- Key Laboratory of Drinking Water Science and Technology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China; University of Chinese Academy of Sciences, Beijing 100049, China
| | - Ying Yu
- Key Laboratory of Drinking Water Science and Technology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China; University of Chinese Academy of Sciences, Beijing 100049, China
| | - Hui Tao
- College of Environmental Science and Engineering, Hohai University, Nanjing 210098, China
| | - Guangming Zhang
- School of Environment & Natural Resource, Renmin University of China, Beijing 100872, China.
| | - Baoyou Shi
- Key Laboratory of Drinking Water Science and Technology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China; University of Chinese Academy of Sciences, Beijing 100049, China.
| |
Collapse
|
8
|
Hou L, Zhou Q, Wu Q, Gu Q, Sun M, Zhang J. Spatiotemporal changes in bacterial community and microbial activity in a full-scale drinking water treatment plant. THE SCIENCE OF THE TOTAL ENVIRONMENT 2018; 625:449-459. [PMID: 29291559 DOI: 10.1016/j.scitotenv.2017.12.301] [Citation(s) in RCA: 53] [Impact Index Per Article: 8.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/31/2017] [Revised: 12/23/2017] [Accepted: 12/25/2017] [Indexed: 06/07/2023]
Abstract
To gain insight into the bacterial dynamics present in drinking water treatment (DWT) systems, the microbial community and activity in a full-scale DWT plant (DWTP) in Guangzhou, South China, were investigated using Illumina Hiseq sequencing analyses combined with cultivation-based techniques during the wet and dry seasons. Illumina sequencing analysis of 16S rRNA genes revealed a large shift in the proportion of Actinobacteria, Proteobacteria and Firmicutes during the treatment process, with the proportion of Actinobacteria decreased sharply, whereas that of Proteobacteria and Firmicutes increased and predominated in treated water. Both microbial activity and bacterial diversity during the treatment process showed obvious spatial variation, with higher levels observed during the dry season and lower levels during the wet season. Clustering analysis and principal component analysis indicated dramatic shifts in the bacterial community after chlorination, suggesting that chlorination was highly effective at influencing the bacterial community. The bacterial community structure of finished water primarily comprised Pseudomonas, Citrobacter, and Acinetobacter, and interestingly showed high similarity to biofilms on granular activated carbon. Additionally, the abundance of bacterial communities was relatively stable in finished water and did not change with the season. A large number of unique operational taxonomic units were shared during treatment steps, indicating the presence of a diverse core microbiome throughout the treatment process. Opportunistic pathogens, including Pseudomonas, Acinetobacter, Citrobacter, Mycobacterium, Salmonella, Staphylococcus, Legionella, Streptococcus and Enterococcus, were detected in water including finished water, suggesting a potential threat to drinking-water safety. We also detected bacteria isolated from each treatment step using the pure-culture method. In particular, two isolates, identified as Mycobacterium sp. and Blastococcus sp., which belong to the phylum Actinobacteria, were obtained from finished water during the dry season. Together, these results provided evidence of spatial and temporal variations in DWTPs and contributed to the beneficial manipulation of the drinking water microbiome.
Collapse
Affiliation(s)
- Luanfeng Hou
- School of Environment and Energy, South China University of Technology, Guangzhou 510006, PR China; Guangdong Institute of Microbiology, State Key Laboratory of Applied Microbiology Southern China, Guangdong Provincial Key Laboratory of Microbial Culture Collection and Application, Guangdong Open Laboratory of Applied Microbiology, Guangzhou 510070, PR China
| | - Qin Zhou
- School of Environment and Energy, South China University of Technology, Guangzhou 510006, PR China
| | - Qingping Wu
- Guangdong Institute of Microbiology, State Key Laboratory of Applied Microbiology Southern China, Guangdong Provincial Key Laboratory of Microbial Culture Collection and Application, Guangdong Open Laboratory of Applied Microbiology, Guangzhou 510070, PR China
| | - Qihui Gu
- Guangdong Institute of Microbiology, State Key Laboratory of Applied Microbiology Southern China, Guangdong Provincial Key Laboratory of Microbial Culture Collection and Application, Guangdong Open Laboratory of Applied Microbiology, Guangzhou 510070, PR China
| | - Ming Sun
- Guangdong Institute of Microbiology, State Key Laboratory of Applied Microbiology Southern China, Guangdong Provincial Key Laboratory of Microbial Culture Collection and Application, Guangdong Open Laboratory of Applied Microbiology, Guangzhou 510070, PR China; Guangzhou Institute of Chemistry, Chinese Academy of Sciences, Guangzhou 510650, PR China
| | - Jumei Zhang
- Guangdong Institute of Microbiology, State Key Laboratory of Applied Microbiology Southern China, Guangdong Provincial Key Laboratory of Microbial Culture Collection and Application, Guangdong Open Laboratory of Applied Microbiology, Guangzhou 510070, PR China.
| |
Collapse
|
9
|
Wang F, Li W, Zhang J, Qi W, Zhou Y, Xiang Y, Shi N. Characterization of suspended bacteria from processing units in an advanced drinking water treatment plant of China. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2017; 24:12176-12184. [PMID: 28353100 DOI: 10.1007/s11356-017-8874-z] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/05/2016] [Accepted: 03/20/2017] [Indexed: 06/06/2023]
Abstract
For the drinking water treatment plant (DWTP), the organic pollutant removal was the primary focus, while the suspended bacterial was always neglected. In this study, the suspended bacteria from each processing unit in a DWTP employing an ozone-biological activated carbon process was mainly characterized by using heterotrophic plate counts (HPCs), a flow cytometer, and 454-pyrosequencing methods. The results showed that an adverse changing tendency of HPC and total cell counts was observed in the sand filtration tank (SFT), where the cultivability of suspended bacteria increased to 34%. However, the cultivability level of other units stayed below 3% except for ozone contact tank (OCT, 13.5%) and activated carbon filtration tank (ACFT, 34.39%). It meant that filtration processes promoted the increase in cultivability of suspended bacteria remarkably, which indicated biodegrading capability. In the unit of OCT, microbial diversity indexes declined drastically, and the dominant bacteria were affiliated to Proteobacteria phylum (99.9%) and Betaproteobacteria class (86.3%), which were also the dominant bacteria in the effluent of other units. Besides, the primary genus was Limnohabitans in the effluents of SFT (17.4%) as well as ACFT (25.6%), which was inferred to be the crucial contributors for the biodegradable function in the filtration units. Overall, this paper provided an overview of community composition of each processing units in a DWTP as well as reference for better developing microbial function for drinking water treatment in the future.
Collapse
Affiliation(s)
- Feng Wang
- State Key Laboratory of Pollution Control and Resource Reuse, Tongji University, 1239 Siping Road, Shanghai, 200092, P. R. China
- College of Environmental Science and Engineering, Tongji University, Shanghai, 200092, P. R. China
| | - Weiying Li
- State Key Laboratory of Pollution Control and Resource Reuse, Tongji University, 1239 Siping Road, Shanghai, 200092, P. R. China.
- Key Laboratory of Yangtze Aquatic Environment, Ministry of Education, College of Environmental Science and Engineering, Tongji University, Shanghai, 200092, P. R. China.
| | - Junpeng Zhang
- College of Environmental Science and Engineering, Tongji University, Shanghai, 200092, P. R. China
- Key Laboratory of Yangtze Aquatic Environment, Ministry of Education, College of Environmental Science and Engineering, Tongji University, Shanghai, 200092, P. R. China
| | - Wanqi Qi
- State Key Laboratory of Pollution Control and Resource Reuse, Tongji University, 1239 Siping Road, Shanghai, 200092, P. R. China
- College of Environmental Science and Engineering, Tongji University, Shanghai, 200092, P. R. China
| | - Yanyan Zhou
- College of Environmental Science and Engineering, Tongji University, Shanghai, 200092, P. R. China
- Key Laboratory of Yangtze Aquatic Environment, Ministry of Education, College of Environmental Science and Engineering, Tongji University, Shanghai, 200092, P. R. China
| | - Yuan Xiang
- State Key Laboratory of Pollution Control and Resource Reuse, Tongji University, 1239 Siping Road, Shanghai, 200092, P. R. China
- College of Environmental Science and Engineering, Tongji University, Shanghai, 200092, P. R. China
| | - Nuo Shi
- College of Environmental Science and Engineering, Tongji University, Shanghai, 200092, P. R. China
- Key Laboratory of Yangtze Aquatic Environment, Ministry of Education, College of Environmental Science and Engineering, Tongji University, Shanghai, 200092, P. R. China
| |
Collapse
|