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Yan X, Chio C, Li H, Zhu Y, Chen X, Qin W. Colonization characteristics and surface effects of microplastic biofilms: Implications for environmental behavior of typical pollutants. THE SCIENCE OF THE TOTAL ENVIRONMENT 2024; 937:173141. [PMID: 38761927 DOI: 10.1016/j.scitotenv.2024.173141] [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: 01/04/2024] [Revised: 04/22/2024] [Accepted: 05/09/2024] [Indexed: 05/20/2024]
Abstract
This paper summarizes the colonization dynamics of biofilms on microplastics (MPs) surfaces in aquatic environments, encompassing bacterial characteristics, environmental factors affecting biofilm formation, and matrix types and characteristics. The interaction between biofilm and MPs was also discussed. Through summarizing recent literatures, it was found that MPs surfaces offer numerous benefits to microorganisms, including nutrient enrichment and enhanced resistance to environmental stress. Biofilm colonization changes the surface physical and chemical properties as well as the transport behavior of MPs. At the same time, biofilms also play an important role in the fragmentation and degradation of MPs. In addition, we also investigated the coexistence level, adsorption mechanism, enrichment, and transformation of MPs by environmental pollutants mediated by biofilms. Moreover, an interesting aspect about the colonization of biofilms was discussed. Biofilm colonization not only had a great effect on the accumulation of heavy metals by MPs, but also affects the interaction between particles and environmental pollutants, thereby changing their toxic effects and increasing the difficulty of MPs treatment. Consequently, further attention and research are warranted to delve into the internal mechanisms, environmental risks, and the control of the coexistence of MPs and biofilms.
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Affiliation(s)
- Xiurong Yan
- College of Environmental & Resource Sciences, Shanxi University, Taiyuan 030006, Shanxi Province, China; Shanxi Laboratory for Yellow River, Taiyuan 030006, Shanxi Province, China
| | - Chonlong Chio
- Department of Biology, Lakehead University, Thunder Bay, Ontario P7B 5E1, Canada
| | - Hua Li
- College of Environmental & Resource Sciences, Shanxi University, Taiyuan 030006, Shanxi Province, China; Shanxi Laboratory for Yellow River, Taiyuan 030006, Shanxi Province, China
| | - Yuen Zhu
- College of Environmental & Resource Sciences, Shanxi University, Taiyuan 030006, Shanxi Province, China; Shanxi Laboratory for Yellow River, Taiyuan 030006, Shanxi Province, China; Department of Biology, Lakehead University, Thunder Bay, Ontario P7B 5E1, Canada.
| | - Xuantong Chen
- Department of Biology, Lakehead University, Thunder Bay, Ontario P7B 5E1, Canada
| | - Wensheng Qin
- Department of Biology, Lakehead University, Thunder Bay, Ontario P7B 5E1, Canada.
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2
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Biao W, Hashim NA, Rabuni MFB, Lide O, Ullah A. Microplastics in aquatic systems: An in-depth review of current and potential water treatment processes. CHEMOSPHERE 2024; 361:142546. [PMID: 38849101 DOI: 10.1016/j.chemosphere.2024.142546] [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: 11/23/2023] [Revised: 05/29/2024] [Accepted: 06/04/2024] [Indexed: 06/09/2024]
Abstract
Plastic products, despite their undeniable utility in modern life, pose significant environmental challenges, particularly when it comes to recycling. A crucial concern is the pervasive introduction of microplastics (MPs) into aquatic ecosystems, with deleterious effects on marine organisms. This review presents a detailed examination of the methodologies developed for MPs removal in water treatment systems. Initially, investigating the most common types of MPs in wastewater, subsequently presenting methodologies for their precise identification and quantification in aquatic environments. Instruments such as scanning electron microscopy, dynamic light scattering, Fourier transform infrared spectroscopy, Raman spectroscopy, surface-enhanced Raman spectroscopy, and Raman tweezers stand out as powerful tools for studying MPs. The discussion then transitions to the exploration of both existing and emergent techniques for MPs removal in wastewater treatment plants and drinking water treatment plants. This includes a description of the core mechanisms that drive these techniques, with an emphasis on the latest research developments in MPs degradation. Present MPs removal methodologies, ranging from physical separation to chemical and biological adsorption and degradation, offer varied advantages and constraints. Addressing the MPs contamination problem in its entirety remains a significant challenge. In conclusion, the review offers a succinct overview of each technique and forwards recommendations for future research, highlighting the pressing nature of this environmental dilemma.
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Affiliation(s)
- Wang Biao
- Department of Chemical Engineering, Faculty of Engineering, Universiti Malaya, 50603, Kuala Lumpur, Malaysia
| | - N Awanis Hashim
- Department of Chemical Engineering, Faculty of Engineering, Universiti Malaya, 50603, Kuala Lumpur, Malaysia; Sustainable Process Engineering Centre (SPEC), Department of Chemical Engineering, Faculty of Engineering, Universiti Malaya, Kuala Lumpur, 50603, Malaysia.
| | - Mohamad Fairus Bin Rabuni
- Department of Chemical Engineering, Faculty of Engineering, Universiti Malaya, 50603, Kuala Lumpur, Malaysia; Sustainable Process Engineering Centre (SPEC), Department of Chemical Engineering, Faculty of Engineering, Universiti Malaya, Kuala Lumpur, 50603, Malaysia.
| | - Ong Lide
- Department of Chemical Engineering, Faculty of Engineering, Universiti Malaya, 50603, Kuala Lumpur, Malaysia
| | - Aubaid Ullah
- Department of Chemical Engineering, Faculty of Engineering, Universiti Malaya, 50603, Kuala Lumpur, Malaysia
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3
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Tian L, Zhou P, Su Z, Graham N, Yu W. Surface Microstructure Drives Biofilm Formation and Biofouling of Graphene Oxide Membranes in Practical Water Treatment. ENVIRONMENTAL SCIENCE & TECHNOLOGY 2024; 58:12281-12291. [PMID: 38939969 DOI: 10.1021/acs.est.4c03363] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/29/2024]
Abstract
Significant progress has been made previously in the research and development of graphene oxide (GO) membranes for water purification, but their biofouling behavior remains poorly understood. In this study, we investigated the biofilm formation and biofouling of GO membranes with different surface microstructures in the context of filtering natural surface water and for an extended operation period (110 days). The results showed that the relatively hydrophilic and smooth Fe(OH)3/GO membrane shaped a thin and spatially heterogeneous biofilm with high stable flux. However, the ability to simultaneously mitigate biofilm formation and reduce biofouling was not observed in the weakly hydrophilic and wrinkled Fe/GO and H-Fe(OH)3/GO membranes. Microbial analyses revealed that the hydrophilicity and roughness distinguished the bacterial communities and metabolic functions. The organic matter-degrading and predatory bacteria were more adapted to hydrophilic and smooth GO surfaces. These functional taxa were involved in the degradation of extracellular polymeric substances (EPS), and improved biofilm heterogeneity. In contrast, the weakly hydrophilic and wrinkled GO surfaces had reduced biodiversity, while unexpectedly boosting the proliferation of EPS-secreting bacteria, resulting in increased biofilm formation and aggravated biofouling. Moreover, all GO membranes achieved sustainable water purification during the entire operating period.
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Affiliation(s)
- Long Tian
- State Key Laboratory of Environmental Aquatic Chemistry, Key Laboratory of Drinking Water Science and Technology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, People's Republic of China
- University of Chinese Academy of Sciences, Beijing 100049, People's Republic of China
| | - Peng Zhou
- State Key Laboratory of Environmental Aquatic Chemistry, Key Laboratory of Drinking Water Science and Technology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, People's Republic of China
- University of Chinese Academy of Sciences, Beijing 100049, People's Republic of China
| | - Zhaoyang Su
- State Key Laboratory of Environmental Aquatic Chemistry, Key Laboratory of Drinking Water Science and Technology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, People's Republic of China
| | - Nigel Graham
- Department of Civil and Environmental Engineering, Imperial College London, South Kensington Campus, London SW7 2AZ, U.K
| | - Wenzheng Yu
- State Key Laboratory of Environmental Aquatic Chemistry, Key Laboratory of Drinking Water Science and Technology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, People's Republic of China
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4
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Zhang S, Cui L, Zhao Y, Xie H, Song M, Wu H, Hu Z, Liang S, Zhang J. The critical role of microplastics in the fate and transformation of sulfamethoxazole and antibiotic resistance genes within vertical subsurface-flow constructed wetlands. JOURNAL OF HAZARDOUS MATERIALS 2024; 465:133222. [PMID: 38101014 DOI: 10.1016/j.jhazmat.2023.133222] [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: 09/20/2023] [Revised: 12/04/2023] [Accepted: 12/08/2023] [Indexed: 12/17/2023]
Abstract
Constructed wetlands (CWs) are reservoirs of microplastics (MPs) in the environment. However, knowledge about the impact of MPs on antibiotic removal and the fate of antibiotic resistance genes (ARGs) is limited. We focused on sulfamethoxazole (SMX) as a representative compound to examine the effects of MPs on SMX removal and the proliferation and dissemination of two SMX-related ARGs (sul1 and sul2) in vertical subsurface-flow CW (VFCW) microcosm. The presence of MPs in the substrate was found to enhance the proliferation of microorganisms owing to the large specific surface area of the MPs and the release of dissolved organic carbon (DOC) on MP surfaces, which resulted in a high SMX removal ranging from 97.80 % to 99.80 %. However, the presence of MPs promoted microbial interactions and the horizontal gene transfer (HGT) of ARGs, which led to a significant increase in the abundances of sul1 and sul2 of 68.47 % and 17.20 %, respectively. It is thus imperative to implement rigorous monitoring strategies for MPs to mitigate their potential ecological hazards.
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Affiliation(s)
- Shiwen Zhang
- Environmental Research Institute, Shandong University, Binhai Road 72, Qingdao 266237, China
| | - Lele Cui
- Environmental Research Institute, Shandong University, Binhai Road 72, Qingdao 266237, China
| | - Yanhui Zhao
- School of Environmental Science and Engineering, Shandong University, Binhai Road 72, Qingdao 266237, China
| | - Huijun Xie
- Environmental Research Institute, Shandong University, Binhai Road 72, Qingdao 266237, China.
| | - Maoyong Song
- State Key Laboratory of Environmental Chemistry and Ecotoxicology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China
| | - Haiming Wu
- School of Environmental Science and Engineering, Shandong University, Binhai Road 72, Qingdao 266237, China
| | - Zhen Hu
- School of Environmental Science and Engineering, Shandong University, Binhai Road 72, Qingdao 266237, China
| | - Shuang Liang
- School of Environmental Science and Engineering, Shandong University, Binhai Road 72, Qingdao 266237, China
| | - Jian Zhang
- School of Environmental Science and Engineering, Shandong University, Binhai Road 72, Qingdao 266237, China; College of Safety and Environmental Engineering, Shandong University of Science and Technology, Qingdao 266590, China
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5
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Wu X, Li Y, Su Z, Tian L, Siddique MS, Yu W. Less pressure contributes to gravity-driven membrane ultrafiltration with greater performance: Enhanced driving efficiency and reduced disinfection by-products formation potential. J Environ Sci (China) 2024; 137:407-419. [PMID: 37980026 DOI: 10.1016/j.jes.2023.02.049] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/30/2022] [Revised: 02/25/2023] [Accepted: 02/26/2023] [Indexed: 11/20/2023]
Abstract
Gravity-driven membrane (GDM) systems have been well developed previously; however, impacts of driving (i.e., transmembrane) pressure on their performance received little attention, which may influence GDM performance. In this study, we evaluated 4 GDM systems via altering the transmembrane pressure from 50 mbar to 150 mbar with 2 groups, treating surface water in Beijing, China. Results showed that less driving pressure was more favorable. Specifically, compared to groups (150 mbar), groups under a pressure of 50 mbar were found to have greater normalized permeability and lower total resistance. During the whole operation period, the quality of effluents was gradually improved. For example, the removal efficiency of UV254 was significantly improved; particularly, under low driving pressure, the removal efficiency of UV254 in PES GDM system increased by 11.91%, as compared to the corresponding system under high driving pressure. This observation was consistent with the reduction on disinfection by-products (DBPs) formation potential; groups under 50 mbar achieved better DBPs potential control, indicating the advantages of lower driving pressure. Biofilms were analyzed and responsible for these differences, and distinct distributions of bacteria communities of two GDM systems under 50 and 150 mbar may be responsible for various humic-like substances removal efficiency. Overall, GDM systems under less pressure should be considered and expected to provide suggestions on the design of GDM systems in real applications.
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Affiliation(s)
- Xiaoting Wu
- Colleges of Forestry, Northeast Forestry University, Harbin 150040, China
| | - Yufei Li
- Colleges of Forestry, Northeast Forestry University, Harbin 150040, China
| | - Zhaoyang Su
- State Key Laboratory of Environmental Aquatic Chemistry, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China.
| | - Long Tian
- State Key Laboratory of Environmental Aquatic Chemistry, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China
| | - Muhammad Saboor Siddique
- State Key Laboratory of Environmental Aquatic Chemistry, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China
| | - Wenzheng Yu
- State Key Laboratory of Environmental Aquatic Chemistry, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China.
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6
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Lin D, Lai C, Wang X, Wang Z, Kuang K, Wang Z, Du X, Liu L. Enhanced membrane fouling by microplastics during nanofiltration of secondary effluent considering secretion, interaction and deposition of extracellular polymeric substances. THE SCIENCE OF THE TOTAL ENVIRONMENT 2024; 906:167110. [PMID: 37739085 DOI: 10.1016/j.scitotenv.2023.167110] [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: 07/03/2023] [Revised: 08/25/2023] [Accepted: 09/13/2023] [Indexed: 09/24/2023]
Abstract
Microplastic (MP) has been found to influence membrane fouling during microfiltration/ultrafiltration processes in direct and indirect ways by acting as fouling components and changing microbial activities, respectively. However, there is no relevant research about the contribution of MPs to nanofiltration membrane fouling. In this study, for the first time, the impacts of MPs on membrane fouling during the nanofiltration of secondary effluent (SE) were systematically investigated from the perspective of bacterial extracellular polymeric substances (EPS) secretion, their interaction with coexisting pollutants and also deposition. Membrane flux behaviors indicate that MPs simultaneously aggravated the short-term and long-term membrane fouling resistance of nanofiltration by 46 % and 27 %, respectively. ATR-FTIR, XPS and spectrophotometry spectra demonstrate that the deteriorated membrane fouling by MPs directly resulted from the increased accumulation of protein-like, polysaccharides-like and humic-like substances on membranes. EEM spectra further confirmed that MPs preferred to induce serious cake layers, which dominated membrane flux decline but hindered pore fouling. According to CLSM and SEM-EDS mappings, MPs in SE could stimulate microbial activities and then aggravate EPS secretion, after which their interaction with Ca2+ was also enhanced in bulk solution. The cross-linker nets could promote the deposition of other unlinked pollutants on membranes. Besides, MPs could weaken the rejection of certain dissolved organic matters (from 57 % to 52 % on the 50th day of filtration) by aggravating cake-enhanced concentration polarization (CECP), but improved the average removal of inorganic salts from 58 % to 63 % by improving their back diffusion through cake layers. Based on these analyses, the mechanisms of MP-enhanced membrane fouling during the nanofiltration of SE can be thoroughly revealed.
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Affiliation(s)
- Dachao Lin
- School of Civil and Transportation Engineering, Guangdong University of Technology, Guangzhou 510006, PR China
| | - Caijing Lai
- School of Civil and Transportation Engineering, Guangdong University of Technology, Guangzhou 510006, PR China
| | - Xiaokai Wang
- School of Civil and Transportation Engineering, Guangdong University of Technology, Guangzhou 510006, PR China
| | - Zhihong Wang
- School of Civil and Transportation Engineering, Guangdong University of Technology, Guangzhou 510006, PR China.
| | - Ke Kuang
- GuangZhou Sewage Purification Company, Guangzhou 510627, PR China
| | - Ziyuan Wang
- GuangZhou Sewage Purification Company, Guangzhou 510627, PR China
| | - Xing Du
- School of Civil and Transportation Engineering, Guangdong University of Technology, Guangzhou 510006, PR China.
| | - Lifan Liu
- School of Civil and Transportation Engineering, Guangdong University of Technology, Guangzhou 510006, PR China.
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7
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Tu C, Yang Y, Wang J, Su H, Guo J, Cao D, Lian J, Wang D. In situ effects of microplastics on the decomposition of aquatic macrophyte litter in eutrophic shallow lake sediments, China. ENVIRONMENTAL POLLUTION (BARKING, ESSEX : 1987) 2023; 337:122543. [PMID: 37716693 DOI: 10.1016/j.envpol.2023.122543] [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: 04/29/2023] [Revised: 08/15/2023] [Accepted: 09/11/2023] [Indexed: 09/18/2023]
Abstract
The toxicity of microplastics (MPs) to aquatic organisms has been extensively studied recently. However, few studies have investigated the effects of MPs in sediments on aquatic ecosystem functioning. In the present study, we conducted an in situ experiment to explore the concentration-dependent effects (0.025%, 0.25%, 2.5%) and size-dependent effects (150-300 μm and 500-1000 μm) of polypropylene microplastics (PP MPs) on Vallisneria natans litter decomposition dynamics, in particular, the process associated with macroinvertebrates, microorganisms, as well as microalgae and/or cyanobacteria. The results showed that exposure to high concentrations and large sizes of PP MPs can accelerate leaf litter biomass loss and nutrition release. Moreover, microbial respiration, microalgal and/or cyanobacteria chlorophyll-a were also significantly affected by PP MPs. However, PP MPs have no effect on the abundance of associated macroinvertebrate during the experiment, despite the collection of five macroinvertebrate taxa from two functional feeding groups (i.e., collectors and scrapers). Therefore, our experiment demonstrated that PP MPs may enhance leaf litter decomposition through effected microbial metabolic activity, microalgal and/or cyanobacteria biomass in the sedimentary lake. Overall, our findings highlight that PP MPs have the potential to interfere with the basic ecological functions such as plant litter decomposition in aquatic environments.
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Affiliation(s)
- Chang Tu
- School of Life Sciences, Central China Normal University, Hubei Province, Wuhan, 430079, China
| | - Yongqing Yang
- College of Life Sciences, Chongqing Normal University, Chongqing, 401331, China
| | - Jinbo Wang
- School of Life Sciences, Central China Normal University, Hubei Province, Wuhan, 430079, China
| | - Hailong Su
- School of Life Sciences, Central China Normal University, Hubei Province, Wuhan, 430079, China
| | - Jieying Guo
- School of Life Sciences, Central China Normal University, Hubei Province, Wuhan, 430079, China
| | - Dandan Cao
- School of Life Sciences, Central China Normal University, Hubei Province, Wuhan, 430079, China
| | - Jiapan Lian
- Ministry of Education (MOE) Key Laboratory of Environmental Remediation and Ecosystem Health, College of Environmental and Resources Sciences, Zhejiang University, Hangzhou, 310058, China
| | - Dong Wang
- School of Life Sciences, Central China Normal University, Hubei Province, Wuhan, 430079, China; Bio-resources Key Laboratory of Shaanxi Province, Shaanxi University of Technology, Hanzhong, 723001, Shaanxi Province, PR China.
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8
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Pan H, Zhao X, Zhou X, Yan H, Han X, Wu M, Chen F. Research progress on the role of biofilm in heavy metals adsorption-desorption characteristics of microplastics: A review. ENVIRONMENTAL POLLUTION (BARKING, ESSEX : 1987) 2023; 336:122448. [PMID: 37640222 DOI: 10.1016/j.envpol.2023.122448] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/10/2023] [Revised: 08/15/2023] [Accepted: 08/23/2023] [Indexed: 08/31/2023]
Abstract
Microplastics (MPs) have been found to be widely distributed in aquatic environments, where they will interact with toxic heavy metals and result in more serious adverse effects on the aquatic environments and organisms. However, after entering the aquatic environments, MPs are quickly covered by biofilms, which significantly modify MPs properties and relevant heavy metals adsorption-desorption characteristics In order to better understand the adsorption behavior of heavy metals on biofilm developed MPs (BMPs), we comprehensively reviewed representative studies in this area. First, we summarized the formation process of biofilms on MPs. Subsequently, we reviewed the current understanding on the influence of biofilm formation on the properties of MPs and discussed the metal adsorption-desorption characteristics of MPs affected by these changes. Finally, based on the systematic literature review, some future research needs and strategies were proposed to further understand the interactions between MPs and heavy metals.
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Affiliation(s)
- Haixia Pan
- School of Resources and Civil Engineering, Northeastern University, Shenyang, 110819 China
| | - Xin Zhao
- School of Resources and Civil Engineering, Northeastern University, Shenyang, 110819 China.
| | - Xiuyan Zhou
- School of Resources and Civil Engineering, Northeastern University, Shenyang, 110819 China
| | - Hua Yan
- School of Resources and Civil Engineering, Northeastern University, Shenyang, 110819 China
| | - Xiaoyu Han
- School of Resources and Civil Engineering, Northeastern University, Shenyang, 110819 China
| | - Mingsong Wu
- School of Resources and Civil Engineering, Northeastern University, Shenyang, 110819 China
| | - Fang Chen
- School of Resources and Civil Engineering, Northeastern University, Shenyang, 110819 China
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9
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Yang B, Graham N, Liu P, Liu M, Gregory J, Yu W. Atomic-Level Structural Differences between Fe(III) Coprecipitates Generated by the Addition of Fe(III) Coagulants and by the Oxidation of Fe(II) Coagulants Determine Their Coagulation Behavior in Phosphate and DOM Removal. ENVIRONMENTAL SCIENCE & TECHNOLOGY 2023; 57:12489-12500. [PMID: 37551789 DOI: 10.1021/acs.est.3c03463] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 08/09/2023]
Abstract
In situ Fe(III) coprecipitation from Fe2+ oxidation is a widespread phenomenon in natural environments and water treatment processes. Studies have shown the superiority of in situ Fe(III) (formed by in situ oxidation of a Fe(II) coagulant) over ex situ Fe(III) (using a Fe(III) coagulant directly) in coagulation, but the reasons remain unclear due to the uncertain nature of amorphous structures. Here, we utilized an in situ Fe(III) coagulation process, oxidizing the Fe(II) coagulant by potassium permanganate (KMnO4), to treat phosphate-containing surface water and analyzed differences between in situ and ex situ Fe(III) coagulation in phosphate removal, dissolved organic matter (DOM) removal, and floc growth. Compared to ex situ Fe(III), flocs formed by the natural oxidizing Fe2+ coagulant exhibited more effective phosphate removal. Furthermore, in situ Fe(III) formed through accelerated oxidation by KMnO4 demonstrated improved flocculation behavior and enhanced removal of specific types of DOM by forming a more stable structure while still maintaining effective phosphate removal. Fe K-edge extended X-ray absorption fine structure spectra (EXAFS) of the flocs explained their differences. A short-range ordered strengite-like structure (corner-linked PO4 tetrahedra to FeO6 octahedra) was the key to more effective phosphorus removal of in situ Fe(III) than ex situ Fe(III) and was well preserved when KMnO4 accelerated in situ Fe(III) formation. Conversely, KMnO4 significantly inhibited the edge and corner coordination between FeO6 octahedra and altered the floc-chain-forming behavior by accelerating hydrolysis, resulting in a more dispersed monomeric structure than ex situ Fe(III). This research provides an explanation for the superiority of in situ Fe(III) in phosphorus removal and highlights the importance of atomic-level structural differences between ex situ and in situ Fe(III) coprecipitates in water treatment.
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Affiliation(s)
- Bingqian Yang
- State Key Laboratory of Environmental Aquatic Chemistry, Key Laboratory of Drinking Water Science and Technology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, People's Republic of China
- University of Chinese Academy of Sciences, Beijing 100049, People's Republic of China
| | - Nigel Graham
- Department of Civil and Environmental Engineering, Imperial College London, South Kensington Campus, London SW7 2AZ, U.K
| | - Peng Liu
- School of Environmental Studies, China University of Geosciences, Wuhan 430074, China
| | - Mengjie Liu
- State Key Laboratory of Environmental Aquatic Chemistry, Key Laboratory of Drinking Water Science and Technology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, People's Republic of China
- University of Chinese Academy of Sciences, Beijing 100049, People's Republic of China
| | - John Gregory
- Department of Civil, Environmental and Geomatic Engineering, University College London, Gower Street, London WC1E 6BT, U.K
| | - Wenzheng Yu
- State Key Laboratory of Environmental Aquatic Chemistry, Key Laboratory of Drinking Water Science and Technology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, People's Republic of China
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10
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Shen M, Zhao Y, Liu S, Hu T, Zheng K, Wang Y, Lian J, Meng G. Recent advances on micro/nanoplastic pollution and membrane fouling during water treatment: A review. THE SCIENCE OF THE TOTAL ENVIRONMENT 2023; 881:163467. [PMID: 37062323 DOI: 10.1016/j.scitotenv.2023.163467] [Citation(s) in RCA: 8] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/09/2023] [Revised: 04/07/2023] [Accepted: 04/08/2023] [Indexed: 06/01/2023]
Abstract
Effluent from sewage treatment plant, as an important source of microplastics (MPs) in receiving water, has attracted extensive attention. Membrane separation process shows good microplastic removal performance in the existing tertiary water treatment process. Problematically, membrane fouling and insufficient removal of small organic molecules are still the key obstacles to its further extensive application. Dissolved organics, extracellular polymers and suspended particles in the influent are deposited on the membrane surface and internal structure, reducing the number and pore diameter of effective membrane aperture, and increasing the resistance of membrane filtration. Exploring the mechanism and approach of membrane fouling caused by micro/nanoplastics is the key to alleviate fouling and allow membranes to operate longer. In this paper, removal performance of micro/nanoplastics by current membrane filtration and the contribution to membrane fouling during water treatment are thoroughly reviewed. The coupling mechanisms between micro/nanoplastics and other pollutants and mechanism of membrane fouling caused by composite micro/nanoplastics are discussed. Additionally, on this basis, the prospect of combined process for micro/nanoplastic removal and membrane fouling prevention is also proposed and discussed, which provides a valuable reference for the preferential removal of micro/nanoplastics and development of antifouling membrane.
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Affiliation(s)
- Maocai Shen
- School of Energy and Environment, Anhui University of Technology, Maanshan, Anhui 243002, PR China.
| | - Yifei Zhao
- School of Energy and Environment, Anhui University of Technology, Maanshan, Anhui 243002, PR China
| | - Shiwei Liu
- School of Energy and Environment, Anhui University of Technology, Maanshan, Anhui 243002, PR China
| | - Tong Hu
- Department of Environment Science, Zhejiang University, Hangzhou 310058, PR China
| | - Kaixuan Zheng
- School of Environment, Tsinghua University, Beijing 100084, PR China
| | - Yulai Wang
- School of Energy and Environment, Anhui University of Technology, Maanshan, Anhui 243002, PR China
| | - Jianjun Lian
- School of Energy and Environment, Anhui University of Technology, Maanshan, Anhui 243002, PR China
| | - Guanhua Meng
- School of Energy and Environment, Anhui University of Technology, Maanshan, Anhui 243002, PR China.
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11
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Kim B, Lee SW, Jung EM, Lee EH. Biosorption of sub-micron-sized polystyrene microplastics using bacterial biofilms. JOURNAL OF HAZARDOUS MATERIALS 2023; 458:131858. [PMID: 37356178 DOI: 10.1016/j.jhazmat.2023.131858] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/24/2023] [Revised: 06/01/2023] [Accepted: 06/13/2023] [Indexed: 06/27/2023]
Abstract
Microplastics are becoming a global concern because they pose potential ecological and toxicological risks to organisms. Thus, removing microplastics from aquatic environments is important. In this study, we evaluated the capability of bacterial biofilms as a biological source for the biosorptive removal of sub-micron-sized polystyrene (PS) microplastics. Three bacterial strains-specifically, Pseudomonas aeruginosa, Bacillus subtilis, and Acinetobacter sp.-were used to form biofilms, and each biofilm was tested in batch experiments for the removal of sub-micron-sized PS microplastics. The Acinetobacter sp. biofilm demonstrated excellent removal performance against 430 nm-PS microplastics than other bacterial biofilms and showed a removal capacity of 715.5 mg/g upon treatment with the PS microplastics for 20 min, thus it employed further adsorption experiments. The biosorption of 430 nm-PS microplastics onto the Acinetobacter sp. biofilm was well explained by the pseudo-second-order kinetics and Freundlich isotherm models. Fourier transform infrared analysis indicated that biosorption of 430 nm-PS microplastics onto the Acinetobacter sp. biofilm involved chemisorption. Three environmental parameters-temperature, pH, and coexisting ions-marginally affected the biosorption of 430 nm-PS microplastics onto Acinetobacter sp. biofilm. However, the biosorption capability of Acinetobacter sp. biofilm was diminished when the 430 nm-PS microplastics were incubated in environmental freshwaters for 7 d.
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Affiliation(s)
- Bogyeong Kim
- Department of Microbiology, Pusan National University, 2 Busandaehak-ro 63 beon-gil, Geumjeong-gu, Busan, Republic of Korea
| | - Seung-Woo Lee
- Department of Fine Chemistry, Seoul National University of Science and Technology, 232 Gongneung-ro, Nowon-gu, Seoul, Republic of Korea
| | - Eui-Man Jung
- Department of Molecular Biology, Pusan National University, 2 Busandaehak-ro 63 beon-gil, Geumjeong-gu, Busan, Republic of Korea
| | - Eun-Hee Lee
- Department of Microbiology, Pusan National University, 2 Busandaehak-ro 63 beon-gil, Geumjeong-gu, Busan, Republic of Korea.
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12
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Wang Q, Zhang Y, Chen H, Chen S, Wang Y. Effects of humic acids on the adsorption of Pb(II) ions onto biofilm-developed microplastics in aqueous ecosystems. THE SCIENCE OF THE TOTAL ENVIRONMENT 2023; 882:163466. [PMID: 37088385 DOI: 10.1016/j.scitotenv.2023.163466] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/07/2023] [Revised: 04/08/2023] [Accepted: 04/08/2023] [Indexed: 05/03/2023]
Abstract
Microplastics (MPs), as emerging contaminants can behave as carriers for heavy metals in the water environments. Although the adsorption performance of heavy metals on MPs has been widely investigated, the effects of humic acids (HA) on the adsorption have seldom been explored. The authors were compared the Pb(II) adsorption onto biofilm-developed polyvinyl chloride (Bio-PVC) MPs with Pb(II) adsorption onto virgin PVC MPs (V-PVC), and explored the relationship between surface characteristics and the adsorption properties in the coexistence of HA. Our results showed that due to a larger specific surface area and more oxygen containing groups, Bio-PVC had a larger adsorption capability with a value of 3.57 mg/g than original ones (1.85 mg/g) due to its huge specific surface area and more oxygen containing groups. Microbial community analysis showed that the predominate bacteria in biofilms as Proteobacteria, Acidobacteria, Cyanobacteria, Firmicutes, and Bacteroidetes. Notably, the Pb(II) adsorption onto the V-PVC surfaces was increased, but the adsorption capacities of Pb(II) on Bio-PVC were suppressed with increasing HA. With the co-existence of HA, the increasing complexation and electrostatic attraction had attributed to the increased Pb(II) adsorption ability on V-PVC. Except for its competitive ability, HA has a shield effect which decreases the sorption sites on Bio-PVC. Overall, our findings provide a better understanding of the HA effect on the adsorption mechanism of heavy metals onto MPs in aquatic ecosystems.
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Affiliation(s)
- Qiongjie Wang
- School of Energy and Environment, Anhui University of Technology, Maanshan, Anhui 243002, China
| | - Yangyang Zhang
- School of Energy and Environment, Anhui University of Technology, Maanshan, Anhui 243002, China
| | - Huijuan Chen
- School of Energy and Environment, Anhui University of Technology, Maanshan, Anhui 243002, China
| | - Sulin Chen
- School of Energy and Environment, Anhui University of Technology, Maanshan, Anhui 243002, China
| | - Yulai Wang
- School of Energy and Environment, Anhui University of Technology, Maanshan, Anhui 243002, China.
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13
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Li J, Shan E, Zhao J, Teng J, Wang Q. The factors influencing the vertical transport of microplastics in marine environment: A review. THE SCIENCE OF THE TOTAL ENVIRONMENT 2023; 870:161893. [PMID: 36731545 DOI: 10.1016/j.scitotenv.2023.161893] [Citation(s) in RCA: 36] [Impact Index Per Article: 36.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/23/2022] [Revised: 01/10/2023] [Accepted: 01/25/2023] [Indexed: 06/18/2023]
Abstract
There have been numerous studies that have identified the presence of low-density microplastics (MPs) in the water column and sediments. The focus of current MPs research has shifted towards the interaction of MPs with marine organisms and their potential hazards, including the uptake characteristics, biological transport and toxicological effects of MPs, but the processes involved in the deposition behavior of MPs are still poorly understood. In this review, we summarize the current state of knowledge on the vertical transport of MPs influenced by their physicochemical properties and marine organisms, and discuss their potential impact on MPs deposition. The physicochemical properties of MPs determine their initial distribution. The density, shape, and size of MPs influence their settling state in the marine environment. Marine biota play a key role in the transport of MPs to deep marine environment, mainly by changing the density and adsorption of MPs. Biofouling can alter the surface properties of MPs and increase the overall density, thus affecting the vertical flux of the plastic. Macroalgae may trap MPs particles by producing chemicals or by using electrostatic interactions. Marine swimming organisms ingest MPs and excrete them encapsulated in fecal particles, while the activity of marine benthic organisms may contribute to the transfer of MPs from surface sediments to deeper layers. In addition, MPs may be incorporated into organic particles produced by marine organisms such as marine snow or marine aggregates, increasing the vertical flux of MPs. However, due to the complexity of different sea areas and MPs properties, the deposition behavior of MPs may be the result of the interaction of multiple factors. Thus, the effects of MPs properties, marine organisms and the natural environment on MPs deposition in marine environment needs further research to fill this gap.
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Affiliation(s)
- Jiasen Li
- Research and Development Center for Efficient Utilization of Coastal Bioresources, Yantai Institute of Coastal Zone Research, Chinese Academy of Sciences, Yantai 264003, PR China; Muping Coastal Environment Research Station, Yantai Institute of Coastal Zone Research, Chinese Academy of Sciences, Yantai 264003, PR China; University of Chinese Academy of Sciences, Beijing 100049, PR China
| | - Encui Shan
- Research and Development Center for Efficient Utilization of Coastal Bioresources, Yantai Institute of Coastal Zone Research, Chinese Academy of Sciences, Yantai 264003, PR China; Muping Coastal Environment Research Station, Yantai Institute of Coastal Zone Research, Chinese Academy of Sciences, Yantai 264003, PR China; University of Chinese Academy of Sciences, Beijing 100049, PR China
| | - Jianmin Zhao
- Research and Development Center for Efficient Utilization of Coastal Bioresources, Yantai Institute of Coastal Zone Research, Chinese Academy of Sciences, Yantai 264003, PR China; Muping Coastal Environment Research Station, Yantai Institute of Coastal Zone Research, Chinese Academy of Sciences, Yantai 264003, PR China
| | - Jia Teng
- Research and Development Center for Efficient Utilization of Coastal Bioresources, Yantai Institute of Coastal Zone Research, Chinese Academy of Sciences, Yantai 264003, PR China; Muping Coastal Environment Research Station, Yantai Institute of Coastal Zone Research, Chinese Academy of Sciences, Yantai 264003, PR China
| | - Qing Wang
- Research and Development Center for Efficient Utilization of Coastal Bioresources, Yantai Institute of Coastal Zone Research, Chinese Academy of Sciences, Yantai 264003, PR China; Muping Coastal Environment Research Station, Yantai Institute of Coastal Zone Research, Chinese Academy of Sciences, Yantai 264003, PR China.
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14
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Liu M, Graham NJD, Xu L, Zhang K, Yu W. Bubbleless Air Shapes Biofilms and Facilitates Natural Organic Matter Transformation in Biological Activated Carbon. ENVIRONMENTAL SCIENCE & TECHNOLOGY 2023; 57:4543-4555. [PMID: 36877961 DOI: 10.1021/acs.est.2c08889] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/18/2023]
Abstract
The biodegradation in the middle and downstream of slow-rate biological activated carbon (BAC) is limited by insufficient dissolved oxygen (DO) concentrations. In this study, a bubbleless aerated BAC (termed ABAC) process was developed by installing a hollow fiber membrane (HFM) module within a BAC filter to continuously provide aeration throughout the BAC system. The BAC filter without an HFM was termed NBAC. The laboratory-scale ABAC and NBAC systems operated continuously for 426 days using secondary sewage effluent as an influent. The DO concentrations for NBAC and ABAC were 0.78 ± 0.27 and 4.31 ± 0.44 mg/L, respectively, with the latter providing the ABAC with greater electron acceptors for biodegradation and a microbial community with better biodegradation and metabolism capacity. The biofilms in ABAC secreted 47.3% less EPS and exhibited greater electron transfer capacity than those in NBAC, resulting in enhanced contaminant degradation efficiency and long-term stability. The extra organic matter removed by ABAC included refractory substances with a low elemental ratio of oxygen to carbon (O/C) and a high elemental ratio of hydrogen to carbon (H/C). The proposed ABAC filter provides a valuable, practical example of how to modify the BAC technology to shape the microbial community, and its activity, by optimizing the ambient atmosphere.
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Affiliation(s)
- Mengjie Liu
- State Key Laboratory of Environmental Aquatic Chemistry, Key Laboratory of Drinking Water Science and Technology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing, 100085, People's Republic of China
- University of Chinese Academy of Sciences, Beijing 100049, People's Republic of China
| | - Nigel J D Graham
- Department of Civil and Environmental Engineering, Imperial College London, South Kensington Campus, London, SW7 2AZ, U.K
| | - Lei Xu
- State Key Laboratory of Environmental Aquatic Chemistry, Key Laboratory of Drinking Water Science and Technology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing, 100085, People's Republic of China
| | - Kai Zhang
- State Key Laboratory of Environmental Aquatic Chemistry, Key Laboratory of Drinking Water Science and Technology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing, 100085, People's Republic of China
| | - Wenzheng Yu
- State Key Laboratory of Environmental Aquatic Chemistry, Key Laboratory of Drinking Water Science and Technology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing, 100085, People's Republic of China
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15
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Ali I, Tan X, Li J, Peng C, Wan P, Naz I, Duan Z, Ruan Y. Innovations in the Development of Promising Adsorbents for the Remediation of Microplastics and Nanoplastics - A Critical Review. WATER RESEARCH 2023; 230:119526. [PMID: 36577257 DOI: 10.1016/j.watres.2022.119526] [Citation(s) in RCA: 9] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/09/2022] [Revised: 12/05/2022] [Accepted: 12/21/2022] [Indexed: 06/17/2023]
Abstract
Microplastics and nanoplastics are being assumed as emerging toxic pollutants owing to their unique persistent physicochemical attributes, chemical stability, and nonbiodegradable nature. Owing to their possible toxicological impacts (not only on aquatic biota but also on humans), scientific communities are developing innovative technologies to remove microplastics and nanoplastics from polluted waters. Various technologies, including adsorption, coagulation, photocatalysis, bioremediation, and filtration, have been developed and employed to eliminate microplastics and nanoplastics. Recently, adsorption technology has been getting great interest in capturing microplastics and nanoplastics and achieving excellent removal performance. Therefore, this review is designed to discuss recent innovations in developing promising adsorbents for the remediation of microplastics and nanoplastics from wastewater and natural water. The developed adsorbents have been classified into four main classes: sponge/aerogel-based, metal-based, biochar-based, and other developed adsorbents, and their performance efficiencies have been critically examined. Further, the influence of various pertinent factors, including adsorbents' characteristics, microplastics/nanoplastics' characteristics, solution pH, reaction temperature, natural organic matter, and co-existing/interfering ions on the removal performance of advanced adsorbents, have been critically assessed. Importantly, the particle application of the developed adsorbents in removing microplastics and nanoplastics from natural water has been elucidated. In addition, barriers to market penetration of the developed adsorbents are briefly discussed to help experts transfer adsorption-based technology from laboratory-scale to commercial applications. Finally, the current knowledge gaps and future recommendations are highlighted to assist scientific communal for improving adsorption-based technologies to battle against microplastics and nanoplastics pollution.
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Affiliation(s)
- Imran Ali
- Key Laboratory of Integrated Regulation and Resource Development on Shallow Lakes, Ministry of Education, College of Environment, Hohai University, Nanjing 210098, China
| | - Xiao Tan
- Key Laboratory of Integrated Regulation and Resource Development on Shallow Lakes, Ministry of Education, College of Environment, Hohai University, Nanjing 210098, China.
| | - Juying Li
- College of Chemistry and Environmental Engineering, Shenzhen University, Shenzhen 518060, China
| | - Changsheng Peng
- Key Lab of Marine Environmental Science and Ecology, Ministry of Education, College of Environmental Science and Engineering, Ocean University of China, Qingdao 266100, China; School of Environment and Chemical Engineering, Zhaoqing University, Zhaoqing 526061, China
| | - Peng Wan
- Shenzhen Water Planning & Design Institute Co., Ltd., Shenzhen 518001, China.; Guangdong Provincial Engineering and Technology Research Center for Water Affairs Big Data and Water Ecology, Shenzhen, 518001, China
| | - Iffat Naz
- Department of Biology, Deanship of Educational Services, Qassim University, Buraidah 51452, Kingdom of Saudi Arabia (KSA)
| | - Zhipeng Duan
- Key Laboratory of Integrated Regulation and Resource Development on Shallow Lakes, Ministry of Education, College of Environment, Hohai University, Nanjing 210098, China
| | - Yinlan Ruan
- Institute for Photonics and Advanced Sensing, The University of Adelaide, SA 5005, Australia
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16
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Zhang J, Li G, Yuan X, Li P, Yu Y, Yang W, Zhao S. Reduction of Ultrafiltration Membrane Fouling by the Pretreatment Removal of Emerging Pollutants: A Review. MEMBRANES 2023; 13:membranes13010077. [PMID: 36676884 PMCID: PMC9862110 DOI: 10.3390/membranes13010077] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/29/2022] [Revised: 12/24/2022] [Accepted: 01/06/2023] [Indexed: 05/28/2023]
Abstract
Ultrafiltration (UF) processes exhibit high removal efficiencies for suspended solids and organic macromolecules, while UF membrane fouling is the biggest obstacle affecting the wide application of UF technology. To solve this problem, various pretreatment measures, including coagulation, adsorption, and advanced oxidation, for application prior to UF processes have been proposed and applied in actual water treatment processes. Previously, researchers mainly focused on the contribution of natural macromolecular pollutants to UF membrane fouling, while the mechanisms of the influence of emerging pollutants (EPs) in UF processes (such as antibiotics, microplastics, antibiotic resistance genes, etc.) on membrane fouling still need to be determined. This review introduces the removal efficiency and separation mechanism for EPs for pretreatments combined with UF membrane separation technology and evaluates the degree of membrane fouling based on the UF membrane's materials/pores and the structural characteristics of the cake layer. This paper shows that the current membrane separation process should be actively developed with the aim of overcoming specific problems in order to meet the technical requirements for the efficient separation of EPs.
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Affiliation(s)
- Jianguo Zhang
- School of Chemistry and Materials Science, Jiangsu Normal University, Xuzhou 221116, China
| | - Gaotian Li
- School of Mechanics and Civil Engineering, China University of Mining and Technology, Xuzhou 221116, China
| | - Xingcheng Yuan
- School of Chemistry and Materials Science, Jiangsu Normal University, Xuzhou 221116, China
| | - Panpan Li
- School of Chemistry and Materials Science, Jiangsu Normal University, Xuzhou 221116, China
| | - Yongfa Yu
- School of Chemistry and Materials Science, Jiangsu Normal University, Xuzhou 221116, China
| | - Weihua Yang
- School of Chemistry and Materials Science, Jiangsu Normal University, Xuzhou 221116, China
| | - Shuang Zhao
- School of Chemistry and Materials Science, Jiangsu Normal University, Xuzhou 221116, China
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17
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Hachemi C, Enfrin M, Rashed AO, Jegatheesan V, Hodgson PD, Callahan DL, Lee J, Dumée LF. The impact of PET microplastic fibres on PVDF ultrafiltration performance - A short-term assessment of MP fouling in simple and complex matrices. CHEMOSPHERE 2023; 310:136891. [PMID: 36257385 DOI: 10.1016/j.chemosphere.2022.136891] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/05/2022] [Revised: 09/13/2022] [Accepted: 10/11/2022] [Indexed: 06/16/2023]
Abstract
Wastewater treatment plants (WWTPs) are key components for the capture of microplastics (MPs) before they are released into natural waterways. Removal efficiencies as high as 99% may be achieved but sub-micron MPs as well as nanoplastics have been overlooked because of analytical limitations. Furthermore, short MP fibres are of concern because of their low capture rate as well as the lack of understanding of their influence on purification system efficiency. This study has investigated the impact of poly(ethylene terephthalate) (PET) short nanofibres on the performance of polyvinylidene fluoride (PVDF) ultrafiltration membranes during cross-flow operation. Model MP fibres with an average length of 10 ± 7 μm and a diameter of 142 ± 40 nm were prepared via a combination of electrospinning and fine cutting using a cryomicrotome. The manufactured MPs were added to both pure and synthetic domestic wastewater at a concentration of 1 mg.L-1 to determine their impact on the performance of PVDF ultrafiltration membranes. The results show that PET fibres attach to the membrane in a disorganised manner with low pore coverage. The water flux was decreased by 8% for MPs in pure water and no noticeable effect in wastewater after 3 days of filtration. Additionally, the nutrient removal efficiency of the membrane was not altered by the presence of PET MPs. These findings show that MP fibres do not significantly influence the early stages of filtration for a standard concentration of MPs in wastewater treatment plant studies.
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Affiliation(s)
- Cyril Hachemi
- Institute for Frontier Materials, Deakin University, Waurn Ponds, Victoria, Australia.
| | - Marie Enfrin
- Civil Engineering and Infrastructure, Royal Melbourne Institute of Technology, Melbourne, Victoria, Australia
| | - Ahmed O Rashed
- Institute for Frontier Materials, Deakin University, Waurn Ponds, Victoria, Australia
| | - Veeriah Jegatheesan
- School of Engineering and Water: Effective Technologies and Tools (WETT) Research Centre, Royal Melbourne Institute of Technology, Melbourne, Victoria, Australia
| | - Peter D Hodgson
- Institute for Frontier Materials, Deakin University, Waurn Ponds, Victoria, Australia
| | - Damien L Callahan
- School of Life and Environmental Sciences, Deakin University, Burwood, Victoria, Australia
| | - Judy Lee
- Chemical and Process Engineering, University of Surrey, Guildford, Surrey, United Kingdom
| | - Ludovic F Dumée
- Department of Chemical Engineering, Khalifa University, Abu Dhabi, United Arab Emirates; Research and Innovation Center on CO2 and Hydrogen, Khalifa University, Abu Dhabi, United Arab Emirates; Center for Membrane and Advanced Water Technology, Khalifa University, Abu Dhabi, United Arab Emirates
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18
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Chen C, Pang X, Chen Q, Xu M, Xiao Y, Wu J, Zhang Y, Liu Y, Long L, Yang G. Tetracycline adsorption trajectories on aged polystyrene in a simulated aquatic environment: A mechanistic investigation. THE SCIENCE OF THE TOTAL ENVIRONMENT 2022; 851:158204. [PMID: 36028016 DOI: 10.1016/j.scitotenv.2022.158204] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/23/2022] [Revised: 08/17/2022] [Accepted: 08/18/2022] [Indexed: 06/15/2023]
Abstract
Microplastics (MPs) have attracted widespread attention as an organic class of pollutants as well as pollutant carriers in recipient aquatic ecosystems. In this study, tetracycline (TC) adsorption by polystyrene (PS), with multiple aging-based temporal changes in the adsorption mechanism, was observed. The results revealed that the pseudo-second-order model accurately predicted the TC adsorption kinetics for different types of PS. In addition, the isothermal adsorption processes fit the Freundlich model; however, their interactions were drastically weakened at lower temperatures or increasing salinities. Corresponding to the electrostatic interactions, adsorption TC was largely pH-dependent, with the maximum adsorbed TC content on the PS surface at a pH of 5 in an aqueous environment. More importantly, mechanistic studies have revealed that, compared to virgin PS, TC complexes with aged PS are principally controlled by hydrogen bonding and ionic interactions, followed by π-π, polar-polar, and van der Waals interactions. These findings will aid in understanding the insights of TC and aged PS interactions and the underlying interactive molecular forces, which will be advantageous for comprehending the real case scenario of inter-pollutant interactions and related environmental pollution.
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Affiliation(s)
- Chao Chen
- College of Environmental Sciences, Sichuan Agricultural University, No. 211 Huimin Road, Wenjiang District, Chengdu 611130, China
| | - Xinghua Pang
- College of Environmental Sciences, Sichuan Agricultural University, No. 211 Huimin Road, Wenjiang District, Chengdu 611130, China
| | - Qian Chen
- College of Environmental Sciences, Sichuan Agricultural University, No. 211 Huimin Road, Wenjiang District, Chengdu 611130, China
| | - Min Xu
- College of Environmental Sciences, Sichuan Agricultural University, No. 211 Huimin Road, Wenjiang District, Chengdu 611130, China
| | - Yinlong Xiao
- College of Environmental Sciences, Sichuan Agricultural University, No. 211 Huimin Road, Wenjiang District, Chengdu 611130, China
| | - Jun Wu
- College of Environmental Sciences, Sichuan Agricultural University, No. 211 Huimin Road, Wenjiang District, Chengdu 611130, China
| | - Yanzong Zhang
- College of Environmental Sciences, Sichuan Agricultural University, No. 211 Huimin Road, Wenjiang District, Chengdu 611130, China
| | - Yan Liu
- College of Environmental Sciences, Sichuan Agricultural University, No. 211 Huimin Road, Wenjiang District, Chengdu 611130, China
| | - Lulu Long
- College of Environmental Sciences, Sichuan Agricultural University, No. 211 Huimin Road, Wenjiang District, Chengdu 611130, China.
| | - Gang Yang
- College of Environmental Sciences, Sichuan Agricultural University, No. 211 Huimin Road, Wenjiang District, Chengdu 611130, China.
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19
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Wang X, Xing Y, Lv M, Zhang T, Ya H, Jiang B. Recent advances on the effects of microplastics on elements cycling in the environment. THE SCIENCE OF THE TOTAL ENVIRONMENT 2022; 849:157884. [PMID: 35944635 DOI: 10.1016/j.scitotenv.2022.157884] [Citation(s) in RCA: 46] [Impact Index Per Article: 23.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/04/2022] [Revised: 07/28/2022] [Accepted: 08/03/2022] [Indexed: 06/15/2023]
Abstract
Microplastics (<5 mm) are an emerging pollutant which have received increasing concern in recent years. Microplastics pose a serious hazard and potential risk to the environment due to their migration, transformation, adsorption and degradation properties. The effects of different types of microplastics on the elemental cycles (carbon, nitrogen and phosphorus cycles) in ecosystems were comprehensively summarized. The impacts of microplastics on the element cycle occur mainly in the soil environment and to less extent in other environments. Microplastics affect carbon sources, carbon dioxide (CO2) emissions, and carbon conversion processes, mainly by affecting plant and animal activities, changing gene abundance, enzyme activity, and microbial community composition. Microplastics can affect nitrogen sources, nitrogen fixation, ammonification, nitrification and denitrification processes by changing gene abundance, enzyme activity and microbial community composition. Microplastics can also influence phosphorus content and phosphorus conversion processes by stimulating enzyme activity and changing the composition of microbial communities. Future research needs to analyze the coupling of multiple microplastics and influencing factors on elemental cycling processes. This work provides a better view of the impacts of microplastics on element cycles and the interaction between microplastics and organisms.
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Affiliation(s)
- Xin Wang
- School of Energy and Environmental Engineering, University of Science & Technology Beijing, Beijing 100083, PR China; Beijing Key Laboratory of Resource-oriented Treatment of Industrial Pollutants, University of Science & Technology Beijing, Beijing 100083, PR China
| | - Yi Xing
- School of Energy and Environmental Engineering, University of Science & Technology Beijing, Beijing 100083, PR China; Beijing Key Laboratory of Resource-oriented Treatment of Industrial Pollutants, University of Science & Technology Beijing, Beijing 100083, PR China
| | - Mingjie Lv
- School of Energy and Environmental Engineering, University of Science & Technology Beijing, Beijing 100083, PR China; Beijing Key Laboratory of Resource-oriented Treatment of Industrial Pollutants, University of Science & Technology Beijing, Beijing 100083, PR China
| | - Tian Zhang
- School of Energy and Environmental Engineering, University of Science & Technology Beijing, Beijing 100083, PR China; Beijing Key Laboratory of Resource-oriented Treatment of Industrial Pollutants, University of Science & Technology Beijing, Beijing 100083, PR China
| | - Haobo Ya
- School of Energy and Environmental Engineering, University of Science & Technology Beijing, Beijing 100083, PR China; Beijing Key Laboratory of Resource-oriented Treatment of Industrial Pollutants, University of Science & Technology Beijing, Beijing 100083, PR China; Zhejiang Development & Planning Institute, Hangzhou 310030, PR China
| | - Bo Jiang
- School of Energy and Environmental Engineering, University of Science & Technology Beijing, Beijing 100083, PR China; Beijing Key Laboratory of Resource-oriented Treatment of Industrial Pollutants, University of Science & Technology Beijing, Beijing 100083, PR China; National Engineering Laboratory for Site Remediation Technologies, Beijing 100015, PR China.
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20
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Wang L, Song S, Xu L, Graham NJD, Yu W. Beneficial role of pre- and post-ozonation in a low rate biofiltration-ultrafiltration process treating reclaimed water. WATER RESEARCH 2022; 226:119284. [PMID: 36323208 DOI: 10.1016/j.watres.2022.119284] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/16/2022] [Revised: 10/18/2022] [Accepted: 10/20/2022] [Indexed: 06/16/2023]
Abstract
Previous studies have shown that the combination of biological and ozone oxidation processes can achieve a greater performance in treating natural surface water than each process individually. In this work, we designed and tested an ozonation-gravity-driven up-flow slow rate (0.01 m/h) biofiltration-ozonation (O3-GUSB-O3) process for the pre-treatment of reclaimed water prior to ultrafiltration (UF), with the aim of producing high quality drinking water and a significantly reduced degree of UF fouling. Results showed that O3 coupled with GUSB can effectively remove aromatic compounds (∼ 84.8%), dissolved organic carbon (DOC, ∼ 83.4%), and biopolymers in surface water. In addition, post-ozonation greatly contributed to the reduction of the UF membrane fouling (∼ 6 times greater flux). With regard to the disinfection by-product formation potential (DBPFP) of the final treated water, both trihalomethane formation potential (THMFP) and haloacetic acid formation potential (HAAFP) were greatly reduced (86.4% and 84.8% for THMs and HAAs, respectively). The relationship between DBPFP and various spectral indexes revealed that aromatic compounds and amino acids were more likely to generate DBPs during the disinfection stage. Among these, humic substances were more likely to generate THMs, while low molecular weight carboxylate and carbonyl organic compounds were associated with the generation of HAAs. Moreover, the dosage of O3 during the post-ozonation stage was found to influence directly the generation of DBPs. Overall, this study has conducted a detailed evaluation of a novel multi-ozone biofilter UF process for treating surface water, and the results provide a valuable basis for subsequent studies at larger scale to demonstrate the potential of the treatment process for practical applications.
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Affiliation(s)
- Liang Wang
- State Key Laboratory of Separation Membranes and Membrane Processes, School of Environment Science and Engineering, Tiangong University, Tianjin 300387, China
| | - Shian Song
- State Key Laboratory of Separation Membranes and Membrane Processes, School of Environment Science and Engineering, Tiangong University, Tianjin 300387, China; Key Laboratory of Drinking Water Science and Technology, Research Centre for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China
| | - Lei Xu
- Key Laboratory of Drinking Water Science and Technology, Research Centre for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China.
| | - Nigel J D Graham
- Department of Civil and Environmental Engineering, Imperial College London, South Kensington Campus, London SW7 2AZ, United Kingdom
| | - Wenzheng Yu
- Key Laboratory of Drinking Water Science and Technology, Research Centre for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China.
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Zhang H, Quan H, Zhou S, Sun L, Lu H. Enhanced performance and electron transfer of sulfur-mediated biological process under polyethylene terephthalate microplastics exposure. WATER RESEARCH 2022; 223:119038. [PMID: 36067605 DOI: 10.1016/j.watres.2022.119038] [Citation(s) in RCA: 15] [Impact Index Per Article: 7.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/07/2022] [Revised: 08/24/2022] [Accepted: 08/28/2022] [Indexed: 06/15/2023]
Abstract
Microplastics are ubiquitous in estuaries, coasts, sewage and wastewater treatment plants (WWTPs), which could arouse unexpected effects on critical microbial processes in wastewater treatment. In this study, polyethylene terephthalate microplastics (PET-MPs) were selected to investigate the mechanism of its influence on the performance of sulfur-mediated biological process from the perspective of microbial metabolic activity, electron transfer capacity and microbial community. The results indicated that the exposure of 50 particles/L PET-MPs improved the chemical oxygen demand (COD) and sulfate removal efficiencies by 6.6 ± 0.5% and 4.5 ± 0.3%, respectively, due to the stimulation of microbial metabolic activity and the enrichment of sulfate-reducing bacteria (SRB) species, such as Desulfobacter. In addition, we found that the PET-MPs promoted Cytochrome C (Cyt C) production and improved the direct electron transfer (DET) capacity mediated by Cyt C. The long-term presence of PET-MPs stimulated the secretion of extracellular polymeric substance (EPS), especially the proteins and humic substances, which have been verified to be electroactive polymers to act as electron shuttles to promote the interspecies electron transfer pathway in sulfur-mediated biological process. Meanwhile, the transformation products (bis-(2-hydroxyethyl) terephthalate (BHET) and Mono (2-hydroxyethyl) terephthalic acid (MHET) of PET-MPs were detected in sulfur-mediated biological process. These findings indicate that the sulfur-mediated biological process has good adaptability to the toxicity of PET-MPs, which strengthens a deeper understanding of the dual function of microplastics in WWTPs.
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Affiliation(s)
- Huiqun Zhang
- School of Environmental Science and Engineering, Sun Yat-sen University, Guangzhou, 510275, China; Guangdong Provincial Key Laboratory of Environmental Pollution Control and Remediation Technology (Sun Yat-sen University), Guangzhou, 510275, China; Guangdong Yuehai Water Investment Co., Ltd., Shenzhen, 518021, PR China
| | - Haoting Quan
- School of Environmental Science and Engineering, Sun Yat-sen University, Guangzhou, 510275, China; Guangdong Provincial Key Laboratory of Environmental Pollution Control and Remediation Technology (Sun Yat-sen University), Guangzhou, 510275, China
| | - Sining Zhou
- School of Environmental Science and Engineering, Sun Yat-sen University, Guangzhou, 510275, China; Guangdong Provincial Key Laboratory of Environmental Pollution Control and Remediation Technology (Sun Yat-sen University), Guangzhou, 510275, China
| | - Lianpeng Sun
- School of Environmental Science and Engineering, Sun Yat-sen University, Guangzhou, 510275, China; Guangdong Provincial Key Laboratory of Environmental Pollution Control and Remediation Technology (Sun Yat-sen University), Guangzhou, 510275, China
| | - Hui Lu
- School of Environmental Science and Engineering, Sun Yat-sen University, Guangzhou, 510275, China; Guangdong Provincial Key Laboratory of Environmental Pollution Control and Remediation Technology (Sun Yat-sen University), Guangzhou, 510275, China.
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22
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Wang L, Wu Y, Ren Y, Wang Y, Wang Y, Zhang H. Transition of fouling characteristics after development of membrane wetting in membrane-aerated biofilm reactors (MABRs). CHEMOSPHERE 2022; 299:134355. [PMID: 35306051 DOI: 10.1016/j.chemosphere.2022.134355] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/05/2022] [Revised: 02/28/2022] [Accepted: 03/15/2022] [Indexed: 06/14/2023]
Abstract
The practical applications of water treatment techniques based on hydrophobic aeration membrane are limited due to membrane pores blocking. Various studies have revealed that both biofilm and microbial secretion can exacerbate membrane fouling. Recently, we constructed a membrane-aerated biofilm reactor (MABR) system for treating micro-polluted surface water in order to identify the primary cause for oxygen transfer rate (OTR) decline. It was found that microbial secretion had a more prominent negative effect than that caused by biofilm, as manifested by the fact the effect of microbial secretion (66.49%) was greater than the resistance of biofilm (38.83%). Fouling decreased the total pore volume of all membrane. The peak location of adsorption capacity was more likely to occur at smaller pore sizes with longer running time. Notably, continuous fluorescence distribution between the separating layer and pores like finger in MABR system exhibited an increasing trend with the operation time, indicating a gradual increase of microbial viability. Core protein structure was revealed by different bond peaks (0-90 d). Specifically, for different organic components of EPS, the hydrophilic HIS was the main content, while the mass transfer resistance caused by the gel increased, which reduced the contact angle and increased the bubble point pressure. Therefore, effects of EPS content and composition should be considered during the application of water treatment techniques based on MABR.
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Affiliation(s)
- Lutian Wang
- State Key Laboratory of Separation Membranes and Membrane Processes, TianGong University, Tianjin 300387, China; School of Material Science and Engineering, TianGong University, Tianjin 300387, China
| | - Yun Wu
- State Key Laboratory of Separation Membranes and Membrane Processes, TianGong University, Tianjin 300387, China; School of Environmental Science and Engineering, TianGong University, Tianjin 300387, China.
| | - Yue Ren
- State Key Laboratory of Separation Membranes and Membrane Processes, TianGong University, Tianjin 300387, China; School of Environmental Science and Engineering, TianGong University, Tianjin 300387, China
| | - Yue Wang
- State Key Laboratory of Separation Membranes and Membrane Processes, TianGong University, Tianjin 300387, China; School of Environmental Science and Engineering, TianGong University, Tianjin 300387, China
| | - Yufeng Wang
- Tianjin Urban Construction Design Institute, Tianjin 300122, China
| | - Hongwei Zhang
- State Key Laboratory of Separation Membranes and Membrane Processes, TianGong University, Tianjin 300387, China; School of Environmental Science and Engineering, TianGong University, Tianjin 300387, China
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23
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Goh PS, Kang HS, Ismail AF, Khor WH, Quen LK, Higgins D. Nanomaterials for microplastic remediation from aquatic environment: Why nano matters? CHEMOSPHERE 2022; 299:134418. [PMID: 35351478 DOI: 10.1016/j.chemosphere.2022.134418] [Citation(s) in RCA: 26] [Impact Index Per Article: 13.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/24/2021] [Revised: 03/21/2022] [Accepted: 03/23/2022] [Indexed: 06/14/2023]
Abstract
The contamination of microplastics in aquatic environment is regarded as a serious threat to ecosystem especially to aquatic environment. Microplastic pollution associated problems including their bioaccumulation and ecological risks have become a major concern of the public and scientific community. The removal of microplastics from their discharge points is an effective way to mitigate the adverse effects of microplastic pollution, hence has been the central of the research in this realm. Presently, most of the commonly used water or wastewater treatment technologies are capable of removing microplastic to certain extent, although they are not intentionally installed for this reason. Nevertheless, recognizing the adverse effects posed by microplastic pollution, more efforts are still desired to enhance the current microplastic removal technologies. With their structural multifunctionalities and flexibility, nanomaterials have been increasingly used for water and wastewater treatment to improve the treatment efficiency. Particularly, the unique features of nanomaterials have been harnessed in synthesizing high performance adsorbent and photocatalyst for microplastic removal from aqueous environment. This review looks into the potentials of nanomaterials in offering constructive solutions to resolve the bottlenecks and enhance the efficiencies of the existing materials used for microplastic removal. The current efforts and research direction of which studies can dedicate to improve microplastic removal from water environment with the augmentation of nanomaterial-enabled strategies are discussed. The progresses made to date have witnessed the benefits of harnessing the structural and dimensional advantages of nanomaterials to enhance the efficiency of existing microplastic treatment processes to achieve a more sustainable microplastic cleanup.
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Affiliation(s)
- P S Goh
- Advanced Membrane Technology Research Centre, School of Chemical and Energy Engineering, Faculty of Engineering, Universiti Teknologi Malaysia, 81310, Johor Bahru, Malaysia.
| | - H S Kang
- Marine Technology Centre, Institute for Vehicle System & Engineering, School of Mechanical Engineering, Faculty of Engineering, Universiti Teknologi Malaysia, 81310, Johor Bahru, Malaysia.
| | - A F Ismail
- Advanced Membrane Technology Research Centre, School of Chemical and Energy Engineering, Faculty of Engineering, Universiti Teknologi Malaysia, 81310, Johor Bahru, Malaysia
| | - W H Khor
- Marine Technology Centre, Institute for Vehicle System & Engineering, School of Mechanical Engineering, Faculty of Engineering, Universiti Teknologi Malaysia, 81310, Johor Bahru, Malaysia
| | - L K Quen
- Mechanical Precision Engineering Department, Malaysia-Japan International Institute of Technology, Universiti Teknologi Malaysia, 54100, Kuala Lumpur, Malaysia
| | - D Higgins
- The Ocean Cleanup Interception B.V., 3014, JH Rotterdam, the Netherlands
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24
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Hung CM, Huang CP, Hsieh SL, Chen YT, Ding DS, Hsieh S, Chen CW, Dong CD. Exposure of Goniopora columna to polyethylene microplastics (PE-MPs): Effects of PE-MP concentration on extracellular polymeric substances and microbial community. CHEMOSPHERE 2022; 297:134113. [PMID: 35227744 DOI: 10.1016/j.chemosphere.2022.134113] [Citation(s) in RCA: 16] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/25/2022] [Revised: 02/17/2022] [Accepted: 02/23/2022] [Indexed: 06/14/2023]
Abstract
Although the pollution of coral reefs by microplastics (MPs) is an environmental problem of global significance, the effects of MP concentration on scleractinian corals remain largely underexplored. Herein, we exposed a representative scleractinian coral (Goniopora columna) to different concentrations (5-300 mg L-1) of polyethylene microplastics (PE-MPs; 40-48 μm) over seven days and evaluated the changes in microbial community and extracellular polymeric substances (EPS) using fluorescence excitation-emission matrix spectroscopy and amplicon sequence variants (ASV). At a PE-MP concentration of 300 mg L-1, the relative abundance of Bacillus (Firmicutes phylum) and Ruegeria (Proteobacteria phylum) in PE-MP-associated EPS increased and decreased, respectively, while the effects of exposure depended on the particle size of the extracellular polymeric substance (EPS)-based matrix and the humification index. Humic- and fulvic-like substances were identified as critical EPS components produced by microbial activity. The results have shed new insights into short-term responses of G. columna during exposure to different PE-MP concentrations and reveal important coral-MP-microbiome interactions in coral reef ecosystems. Results demonstrated that the coral-MPs interactions should be further evaluated to gain a deeper understanding of the underlying ecotoxicological risks.
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Affiliation(s)
- Chang-Mao Hung
- Department of Marine Environmental Engineering, National Kaohsiung University of Science and Technology, Kaohsiung City, Taiwan
| | - Chin-Pao Huang
- Department of Civil and Environmental Engineering, University of Delaware, Newark, USA
| | - Shu-Ling Hsieh
- Department of Seafood Science, National Kaohsiung University of Science and Technology, Kaohsiung City, Taiwan
| | - Ya-Ting Chen
- Department of Seafood Science, National Kaohsiung University of Science and Technology, Kaohsiung City, Taiwan
| | - De-Sing Ding
- Department and Graduate Institute of Aquaculture, National Kaohsiung University of Science and Technology, Kaohsiung City, Taiwan
| | - Shuchen Hsieh
- Department of Chemistry, National Sun Yat-sen University, Kaohsiung City, Taiwan
| | - Chiu-Wen Chen
- Department of Marine Environmental Engineering, National Kaohsiung University of Science and Technology, Kaohsiung City, Taiwan.
| | - Cheng-Di Dong
- Department of Marine Environmental Engineering, National Kaohsiung University of Science and Technology, Kaohsiung City, Taiwan.
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25
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Qiongjie W, Yong Z, Yangyang Z, Zhouqi L, Jinxiaoxue W, Huijuan C. Effects of biofilm on metal adsorption behavior and microbial community of microplastics. JOURNAL OF HAZARDOUS MATERIALS 2022; 424:127340. [PMID: 34607028 DOI: 10.1016/j.jhazmat.2021.127340] [Citation(s) in RCA: 18] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/06/2021] [Revised: 09/10/2021] [Accepted: 09/22/2021] [Indexed: 05/23/2023]
Abstract
In this study, the adsorption behavior of Cu(II) and Pb(II) on the biofilm-developed polystyrene (PS) microplastics (MPs) was compared with the virgin PS (V-PS) and UV-aged PS (UV-PS). The results demonstrated that the biofilm could enhance the adsorption abilities onto MPs more than UV radiation. The intra-particle diffusion model suggested that the adsorption on V-PS was dominated by intra-particle diffusion, while the adsorption rate was controlled by the binding diffusion on UV-PS and biofilm-developed PS (Bio-PS). Compared with the V-PS and UV-PS, the Bio-PS showed the largest adsorption capacity based on the Freundlich isotherm model, which indicated that the adsorption of heavy metals onto Bio-PS was multilayer and heterogeneous. The adsorption mechanism of Bio-PS contained physical adsorption, chemisorption, and biosorption. These Bio-PS adsorption types participated in both oxygen and nitrogen groups. Based on the 16S rRNA analysis, the diversity of the microbial community with biofilm changed to a certain extent after the adsorption of heavy metals. Furthermore, the stress of lead (Pb) adsorption had a higher impact on the microbial community distribution and the PS biofilm. This study illustrated how the formation of biofilms can highly affect the adsorption behavior of MPs as well as the microbial community of MPs.
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Affiliation(s)
- Wang Qiongjie
- School of Energy and Environment, Anhui University of Technology, Maanshan, Anhui 243002, China.
| | - Zhang Yong
- School of Energy and Environment, Anhui University of Technology, Maanshan, Anhui 243002, China
| | - Zhang Yangyang
- School of Energy and Environment, Anhui University of Technology, Maanshan, Anhui 243002, China
| | - Liu Zhouqi
- School of Energy and Environment, Anhui University of Technology, Maanshan, Anhui 243002, China
| | - Wang Jinxiaoxue
- School of Energy and Environment, Anhui University of Technology, Maanshan, Anhui 243002, China
| | - Chen Huijuan
- School of Energy and Environment, Anhui University of Technology, Maanshan, Anhui 243002, China
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