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Liao T, Liu X, Liu Y, Li N, Wang J, Li N, Wang X, Li Y, Fan X, Peng W. Sulfate radical dominated rapid pollutants degradation leaded by selenium vacancies in core-shell N-doped carbon wrapped cobalt diselenide nanospheres. J Colloid Interface Sci 2024; 665:219-231. [PMID: 38522161 DOI: 10.1016/j.jcis.2024.03.141] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/01/2024] [Revised: 03/14/2024] [Accepted: 03/20/2024] [Indexed: 03/26/2024]
Abstract
Herein, a new heterogeneous CoSe2-x@NC material with abundant selenium vacancies is synthesized via an in-situ carbonization-selenization process from cobaltic metal organic framework (Co-MOF). The obtained CoSe2-x@NC has a unique electronic structure and rich active sites, which can activate peroxymonosulfate (PMS) to degrade carbamazepine (CBZ) with superior catalytic performance and stability. The quenchingexperiments and EPR test show that SO4•- is the dominant reactive oxidation species (ROSs) for CBZ degradation. Significantly, systemic electrochemical tests and theoretical calculations illustrated that the dominant role of SO4•- is attributed to the existence of abundant selenium vacancies in CoSe2-x@NC, which can adjust the density of electron cloud of the Co atoms in CoSe2-x@NC to improve the PMS adsorption and promoting the conversion of transition metallic redox pairs (Co3+/Co2+). This work provides a facile way to improve the activity and stability of CoSe2 by defect engineering in the PMS based advanced oxidation process (AOPs).
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Affiliation(s)
- Tao Liao
- School of Chemical Engineering and Technology, Tianjin University, Tianjin 300350, China
| | - Xiaomei Liu
- School of Chemical Engineering and Technology, Tianjin University, Tianjin 300350, China
| | - Yuexu Liu
- Peric Special Gases Co., Ltd, No. 1 Weiwu Road, Chemical Industry Cluster Area, Feixiang District, Handan City 056000, Hebei Province, China
| | - Ning Li
- School of Environmental Science and Engineering, Tianjin University, Tianjin 300350, China
| | - Jun Wang
- School of Chemical Engineering and Technology, Tianjin University, Tianjin 300350, China
| | - Ningyuan Li
- School of Chemical Engineering and Technology, Tianjin University, Tianjin 300350, China
| | - Xiaomin Wang
- School of Chemical Engineering and Technology, Tianjin University, Tianjin 300350, China
| | - Yang Li
- School of Chemical Engineering and Technology, Tianjin University, Tianjin 300350, China
| | - Xiaobin Fan
- School of Chemical Engineering and Technology, Tianjin University, Tianjin 300350, China
| | - Wenchao Peng
- School of Chemical Engineering and Technology, Tianjin University, Tianjin 300350, China.
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2
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Liu S, Chen G, Shi Q, Gan J, Jin B, Men Y, Liu H. Promotive Effects of Chloride and Sulfate on the Near-Complete Destruction of Perfluorocarboxylates (PFCAs) in Brine via Hydrogen-tuned 185-nm UV Photolysis: Mechanisms and Kinetics. ENVIRONMENTAL SCIENCE & TECHNOLOGY 2024; 58:10347-10356. [PMID: 38808621 PMCID: PMC11171456 DOI: 10.1021/acs.est.3c10552] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/14/2023] [Revised: 05/01/2024] [Accepted: 05/03/2024] [Indexed: 05/30/2024]
Abstract
Hydrogen-tuned 185 nm vacuum ultraviolet (VUV/H2) photolysis is an emerging technology to destroy per- and polyfluoroalkyl substance (PFAS) in brine. This study discovered the promotive effects of two major brine anions, i.e., chloride and sulfate in VUV/H2 photolysis on the hydrated electron (eaq-) generation and perfluorocarboxylates (PFCAs) destruction and established a kinetics model to elucidate the promotive effects on the steady-state concentration of eaq- ([eaq-]ss). Results showed that VUV/H2 achieved near-complete defluorination of perfluorooctanoic acid (PFOA) in the presence of up to 1000 mM chloride or sulfate at pH 12. The defluorination rate constant (kdeF) of PFOA peaked with a chloride concentration at 100 mM and with a sulfate concentration at 500 mM. The promotive effects of chloride and sulfate were attributed to an enhanced generation of eaq- via their direct VUV photolysis and conversion of additionally generated hydroxyl radical to eaq- by H2, which was supported by a linear correlation between the predicted [eaq-]ss and experimentally observed kdeF. The kdeF value increased from pH 9 to 12, which was attributed to the speciation of the H·/eaq- pair. Furthermore, the VUV system achieved >95% defluorination and ≥99% parent compound degradation of a concentrated PFCAs mixture in a synthetic brine, without generating any toxic perchlorate or chlorate.
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Affiliation(s)
- Sitao Liu
- Department
of Chemical and Environmental Engineering, University of California, Riverside, California 92521, United States
| | - Gongde Chen
- Department
of Chemical and Environmental Engineering, University of California, Riverside, California 92521, United States
| | - Qingyang Shi
- Department
of Environmental Sciences, University of
California, Riverside, California 92521, United States
| | - Jay Gan
- Department
of Environmental Sciences, University of
California, Riverside, California 92521, United States
| | - Bosen Jin
- Department
of Chemical and Environmental Engineering, University of California, Riverside, California 92521, United States
| | - Yujie Men
- Department
of Chemical and Environmental Engineering, University of California, Riverside, California 92521, United States
| | - Haizhou Liu
- Department
of Chemical and Environmental Engineering, University of California, Riverside, California 92521, United States
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3
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Chen M, Moher D, Rogers J, Yatom S, Thimsen E, Parker KM. Effects of Halides on Organic Compound Degradation during Plasma Treatment of Brines. ENVIRONMENTAL SCIENCE & TECHNOLOGY 2024; 58:5139-5152. [PMID: 38446791 DOI: 10.1021/acs.est.3c07162] [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: 03/08/2024]
Abstract
Plasma has been proposed as an alternative strategy to treat organic contaminants in brines. Chemical degradation in these systems is expected to be partially driven by halogen oxidants, which have been detected in halide-containing solutions exposed to plasma. In this study, we characterized specific mechanisms involving the formation and reactions of halogen oxidants during plasma treatment. We first demonstrated that addition of halides accelerated the degradation of a probe compound known to react quickly with halogen oxidants (i.e., para-hydroxybenzoate) but did not affect the degradation of a less reactive probe compound (i.e., benzoate). This effect was attributed to the degradation of para-hydroxybenzoate by hypohalous acids, which were produced via a mechanism involving halogen radicals as intermediates. We applied this mechanistic insight to investigate the impact of constituents in brines on reactions driven by halogen oxidants during plasma treatment. Bromide, which is expected to occur alongside chloride in brines, was required to enable halogen oxidant formation, consistent with the generation of halogen radicals from the oxidation of halides by hydroxyl radical. Other constituents typically present in brines (i.e., carbonates, organic matter) slowed the degradation of organic compounds, consistent with their ability to scavenge species involved during plasma treatment.
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Affiliation(s)
- Moshan Chen
- Department of Energy, Environmental & Chemical Engineering, Washington University in St. Louis, St. Louis, Missouri 63130, United States
| | - Dillon Moher
- Department of Energy, Environmental & Chemical Engineering, Washington University in St. Louis, St. Louis, Missouri 63130, United States
| | - Jacqueline Rogers
- Department of Energy, Environmental & Chemical Engineering, Washington University in St. Louis, St. Louis, Missouri 63130, United States
| | - Shurik Yatom
- Princeton Plasma Physics Laboratory, Princeton University, Princeton, New Jersey 08540 , United States
| | - Elijah Thimsen
- Department of Energy, Environmental & Chemical Engineering, Washington University in St. Louis, St. Louis, Missouri 63130, United States
| | - Kimberly M Parker
- Department of Energy, Environmental & Chemical Engineering, Washington University in St. Louis, St. Louis, Missouri 63130, United States
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4
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Aghabalaei V, Baghdadi M, Goharrizi BA, Noorimotlagh Z. A systematic review of strategies to overcome barrier for nitrate separation systems from drinking water: Focusing on waste streams treatment processes. CHEMOSPHERE 2024; 349:140757. [PMID: 38013022 DOI: 10.1016/j.chemosphere.2023.140757] [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: 08/05/2023] [Revised: 10/28/2023] [Accepted: 11/17/2023] [Indexed: 11/29/2023]
Abstract
By 2030, the UN General Assembly issued the Sustainable Development Goal 6, which calls for the provision of safe drinking water. However, water resources are continuously decreasing in quantity and quality. NO3- is the most widespread pollutant worldwide, threatening both human health and ecosystems. NO3- separation systems (NSS) using IX and membrane-based techniques (MBT) are considered practical and efficient technologies, but the management of IX waste brine (IXWB) and concentrate streams for MBT (CSM), as well as the high salt requirements for IX regeneration, are challenging from both economic and environmental perspectives. It is essential to classify the different waste management strategies in order to examine the current state of research and identify the best option to address these issues. This review provides harmonized information on IXWB/CSM management strategies. This study is the first systematic review of all papers available in the Web of Science, Scopus, and PubMed databases published until February 2023. 75% of the studies focused on the use of biological denitrification (BD) and catalytic denitrification (CD). Although innovative technologies (bio-regeneration and direct CD) have advantages over indirect processes, they are not yet practical for large-scale plants because their reliability is unknown. Moreover, the generation of NH4+ is the major challenge for application large-scale of chemical reduction. An innovative work flow diagram, challenges, and future prospects are presented. The review shows that integrating modified NSS with IXWB/CSM treatment is a promising sustainable solution, as the combination could be economically and environmentally beneficial and remove barriers to NNS application.
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Affiliation(s)
- Vahid Aghabalaei
- Graduate Faculty of Environment, Department of Environmental Engineering, University of Tehran, Iran.
| | - Majid Baghdadi
- Graduate Faculty of Environment, Department of Environmental Engineering, University of Tehran, Iran.
| | | | - Zahra Noorimotlagh
- Health and Environment Research Center, Ilam University of Medical Sciences, Ilam, Iran.
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5
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Aghabalaei V, Baghdadi M, Goharrizi BA, Noorimotlagh Z. Optimum anatase/rutile ratios of TiO 2 for photocatalytic denitrification from IX brine waste and real RO concentrate: RSM-CCD model and the use of an economical and efficient hole scavenger study. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2023; 30:122200-122218. [PMID: 37966635 DOI: 10.1007/s11356-023-30877-y] [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: 08/09/2023] [Accepted: 10/31/2023] [Indexed: 11/16/2023]
Abstract
Both ion exchange (IX) and reverse osmosis (RO) technologies are effective in removing NO3- from drinking water, but the disposal of waste streams and the large amount of salt needed for to prepare fresh brine in IX have become economic and environmental challenges. To overcome these barriers, photocatalytic denitrification (PD) using TiO2 nanoparticles in different anatase/rutile (A/R) ratios was applied to IX brine waste (IXWB) and real RO concentrate (real ROC). The synthesized samples were characterized by XRD, FESEM-EDX, and elemental mapping, BET, and UV-Vis absorption spectra. Experiments design, process optimization, and confirmation of results were performed using CCD-RSM. The study also investigated the use of glycerol, a by-product of biodiesel production, as an economic hole scavenger. The effect of different concentrations of SO4-2 on the removal efficiency of NO3- and the N2 selectivity was also investigated. The anatase phase converts to rutile with increasing calcination temperature, resulting in larger crystallites and particle sizes and narrower optical band gaps of TiO2 nanoparticles. Under optimal conditions, the mixed A (79%)/R (21%) phase of TiO2 with FA showed the highest photoactivity in conversion NO3- (89% and 95%) with N2 selectivity (83% and 85% for IXWB and real ROC, respectively). For real ROC, the use of glycerol as an economical hole scavenger resulted in 100% NO3- reduction. A possible mechanism involving glycerol and FA is discussed. Finally, optimized (A/R) ratios of TiO2 nanoparticles were successfully supported on the surface of GAC (GAC/TiO2). The composite sample can be easily recycled and reused from solution and exhibits high photoactivity even after five cycles.
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Affiliation(s)
- Vahid Aghabalaei
- Graduate Faculty of Environment, Department of Environmental Engineering, University of Tehran, Tehran, Iran
| | - Majid Baghdadi
- Graduate Faculty of Environment, Department of Environmental Engineering, University of Tehran, Tehran, Iran.
| | | | - Zahra Noorimotlagh
- Health and Environment Research Center, Ilam University of Medical Sciences, Ilam, Iran
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6
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Zhang M, Zhao X, Zhao D, Soong TY, Tian S. Poly- and Perfluoroalkyl Substances (PFAS) in Landfills: Occurrence, Transformation and Treatment. WASTE MANAGEMENT (NEW YORK, N.Y.) 2023; 155:162-178. [PMID: 36379166 DOI: 10.1016/j.wasman.2022.10.028] [Citation(s) in RCA: 18] [Impact Index Per Article: 18.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/07/2022] [Revised: 10/21/2022] [Accepted: 10/24/2022] [Indexed: 06/16/2023]
Abstract
Landfills have served as the final repository for > 50 % municipal solid wastes in the United States. Because of their widespread uses and persistence in the environment, per- and polyfluoroalkyl substances (PFAS) (>4000 on the global market) are ubiquitously present in everyday consumer, commercial and industrial products, and have been widely detected in both closed (tens ng/L) and active (thousands to ten thousands ng/L) landfills due to disposal of PFAS-containing materials. Along with the decomposition of wastes in-place, PFAS can be transformed and released from the wastes into leachate and landfill gas. Consequently, it is critical to understand the occurrence and transformation of PFAS in landfills and the effectiveness of landfills, as a disposal alternative, for long-term containment of PFAS. This article presents a state-of-the-art review on the occurrence and transformation of PFAS in landfills, and possible effect of PFAS on the integrity of modern liner systems. Based on the data published from 10 countries (250 + landfills), C4-C7 perfluoroalkyl carboxylic acids were found predominant in the untreated landfill leachate and neutral PFAS, primarily fluorotelomer alcohols, in landfill air. The effectiveness and limitations of the conventional leachate treatment technologies and emerging technologies were also evaluated to address PFAS released into the leachate. Among conventional technologies, reverse osmosis (RO) may achieve a high removal efficiency of 90-100 % based on full-scale data, which, however, is vulnerable to the organic fouling and requires additional disposal of the concentrate. Implications of these knowledge on PFAS management at landfills are discussed and major knowledge gaps are identified.
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Affiliation(s)
- Man Zhang
- CTI and Associates, Inc., 34705 W 12 Mile Rd Suite 230, Farmington Hills, MI 48331, USA.
| | - Xianda Zhao
- CTI and Associates, Inc., 34705 W 12 Mile Rd Suite 230, Farmington Hills, MI 48331, USA
| | - Dongye Zhao
- Environmental Engineering Program, Department of Civil & Environmental Engineering, Auburn University, Auburn AL 36849, USA; Department of Civil, Construction and Environmental Engineering, San Diego State University, 5500 Campanile Drive, San Diego, CA 92182, USA.
| | - Te-Yang Soong
- CTI and Associates, Inc., 34705 W 12 Mile Rd Suite 230, Farmington Hills, MI 48331, USA
| | - Shuting Tian
- Environmental Engineering Program, Department of Civil & Environmental Engineering, Auburn University, Auburn AL 36849, USA; Institute of Environmental Science, Taiyuan University of Science and Technology, Taiyuan, Shanxi 030024, China
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7
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Eryildiz B, Keskin B, Pasaoglu ME, Turken T, Vatanpour V, Koyuncu I. Preparation and characterization of polyvinyl chloride membranes and their fouling behavior in water purification. J Appl Polym Sci 2022. [DOI: 10.1002/app.53496] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Affiliation(s)
- Bahriye Eryildiz
- National Research Center on Membrane Technologies Istanbul Technical University Istanbul Turkey
- Department of Environmental Engineering Istanbul Technical University Istanbul Turkey
| | - Basak Keskin
- National Research Center on Membrane Technologies Istanbul Technical University Istanbul Turkey
- Department of Environmental Engineering Istanbul Technical University Istanbul Turkey
| | - Mehmet Emin Pasaoglu
- National Research Center on Membrane Technologies Istanbul Technical University Istanbul Turkey
- Department of Environmental Engineering Istanbul Technical University Istanbul Turkey
| | - Turker Turken
- National Research Center on Membrane Technologies Istanbul Technical University Istanbul Turkey
- Department of Environmental Engineering Istanbul Technical University Istanbul Turkey
| | - Vahid Vatanpour
- National Research Center on Membrane Technologies Istanbul Technical University Istanbul Turkey
- Department of Environmental Engineering Istanbul Technical University Istanbul Turkey
- Department of Applied Chemistry, Faculty of Chemistry Kharazmi University Tehran Iran
| | - Ismail Koyuncu
- National Research Center on Membrane Technologies Istanbul Technical University Istanbul Turkey
- Department of Environmental Engineering Istanbul Technical University Istanbul Turkey
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8
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Patyuk LK, Klymenko NA, Nevynna LV. Development of Basic Technological Scheme Options in the Integrated System of Waste Water Treatment after Regeneration of H+ and Na+ Cationite Filters. J WATER CHEM TECHNO+ 2022. [DOI: 10.3103/s1063455x22060108] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
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9
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Atrashkevich A, Fajardo AS, Westerhoff P, Walker WS, Sánchez-Sánchez CM, Garcia-Segura S. Overcoming barriers for nitrate electrochemical reduction: By-passing water hardness. WATER RESEARCH 2022; 225:119118. [PMID: 36155008 DOI: 10.1016/j.watres.2022.119118] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/22/2022] [Revised: 08/16/2022] [Accepted: 09/13/2022] [Indexed: 06/16/2023]
Abstract
Water matrix composition impacts water treatment performance. However, matrix composition impacts have rarely been studied for electrochemical water treatment processes, and the correlation between the composition and the treatment efficiency is lacking. This work evaluated the electrochemical reduction of nitrate (ERN) using different complex water matrices: groundwater, brackish water, and reverse osmosis (RO) concentrate/brine. The ERN was conducted using a tin (Sn) cathode because of the high selectivity towards nitrogen evolution reported for Sn electrocatalysts. The co-existence of calcium (Ca2+), magnesium (Mg2+), and carbonate (CO32-) ions in water caused a 4-fold decrease in the nitrate conversion into innocuous nitrogen gas due to inorganic scaling formation on the cathode surface. XRF and XRD analysis of fouled catalyst surfaces detected brucite (Mg(OH)2), calcite (CaCO3), and dolomite (CaMg(CO3)2) mineral scales formed on the cathode surface. Surface scaling created a physical barrier on the electrode that decreased the ERN efficiency. Identifying these main sources of ERN inhibition was key to devising potential fouling mitigation strategies. For this reason, the chemical softening pre-treatment of a real brackish water was conducted and this significantly increased nitrate conversion and faradaic efficiency during subsequent ERN treatment, leading to a lower electric energy consumption per order. Understanding the ionic foulant composition responsible for influencing electrochemically-driven technologies are the first steps that must be taken to move towards niche applications such as decentralized ERN. Thus, we propose either direct ERN implementation in regions facing high nitrate levels in soft waters, or a hybrid softening/nitrate removal system for those regions where high nitrate and high-water hardness appear simultaneously.
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Affiliation(s)
- Aksana Atrashkevich
- Nanosystems Engineering Research Center for Nanotechnology-Enabled Water Treatment, School of Sustainable Engineering and the Built Environment, Arizona State University, Tempe, AZ 85287-3005, USA
| | - Ana S Fajardo
- Nanosystems Engineering Research Center for Nanotechnology-Enabled Water Treatment, School of Sustainable Engineering and the Built Environment, Arizona State University, Tempe, AZ 85287-3005, USA; Laboratoire Interfaces et Systèmes Electrochimiques (LISE), Sorbonne Université, CNRS, 4 Place Jussieu, Paris 75005, France.
| | - Paul Westerhoff
- Nanosystems Engineering Research Center for Nanotechnology-Enabled Water Treatment, School of Sustainable Engineering and the Built Environment, Arizona State University, Tempe, AZ 85287-3005, USA
| | - W Shane Walker
- Nanosystems Engineering Research Center for Nanotechnology-Enabled Water Treatment, School of Sustainable Engineering and the Built Environment, Arizona State University, Tempe, AZ 85287-3005, USA; Civil Engineering, Center for Inland Desalination Systems, University of Texas at El Paso, El Paso, TX, USA
| | - Carlos M Sánchez-Sánchez
- Laboratoire Interfaces et Systèmes Electrochimiques (LISE), Sorbonne Université, CNRS, 4 Place Jussieu, Paris 75005, France
| | - Sergi Garcia-Segura
- Nanosystems Engineering Research Center for Nanotechnology-Enabled Water Treatment, School of Sustainable Engineering and the Built Environment, Arizona State University, Tempe, AZ 85287-3005, USA.
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10
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Liu Z, Mohseni M, Sauvé S, Barbeau B. Segmented Regeneration of Ion Exchange Resins Used for Natural Organic Matter Removal. Sep Purif Technol 2022. [DOI: 10.1016/j.seppur.2022.122271] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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11
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Chowdhury S, Koyappathody TMF, Karanfil T. Removal of halides from drinking water: technological achievements in the past ten years and research needs. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2022; 29:55514-55527. [PMID: 35689777 DOI: 10.1007/s11356-022-21346-z] [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: 03/15/2022] [Accepted: 06/03/2022] [Indexed: 06/15/2023]
Abstract
Disinfection is an essential process for drinking water supplies resulting in the formation of unintended disinfection by-products (DBPs), many of which are potentially toxic and are known as the possible or probable human carcinogens. As of now, 100+ DBPs were characterized while about 600+ others can be formed in the supply water. To protect the human health, many regulatory agencies have set the guideline values for several DBPs. Removal of halide ions and natural organic matter prior to disinfection is an important step to reduce DBPs, and the associated exposure and risks. To date, many publications have reported various methods for halide removal from drinking water. The most review about halide removal technologies, associated challenges, and future research needs was published in 2012. Since then, a number of studies have been published on different methods of halide removal techniques. This paper aims to review the state of research on halide removal techniques focusing on the development during the past 10 years (2012-2021). The techniques were clustered into six major groups: adsorption, ion exchange, coagulation, advanced oxidation, membrane separation, and combined techniques. The progress on these groups of technologies, their advantages, and limitations were examined, and the future research directions to produce the safe drinking water were identified.
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Affiliation(s)
- Shakhawat Chowdhury
- Department of Civil and Environmental Engineering, King Fahd University of Petroleum & Minerals, Dhahran, 31261, Saudi Arabia.
- Interdisciplinary Research Center for Construction and Building Materials, King Fahd University of Petroleum & Minerals, Dhahran, 31261, Saudi Arabia.
| | - Tariq M F Koyappathody
- Department of Civil and Environmental Engineering, King Fahd University of Petroleum & Minerals, Dhahran, 31261, Saudi Arabia
| | - Tanju Karanfil
- Department of Environmental Engineering and Earth Sciences, Clemson University, Clemson, SC, USA
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12
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Efficient Nitrate Adsorption from Groundwater by Biochar-Supported Al-Substituted Goethite. SUSTAINABILITY 2022. [DOI: 10.3390/su14137824] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
Groundwater nitrate contamination is challenging and requires efficient solutions for nitrate removal. This study aims to investigate nitrate removal using a novel adsorbent, biochar-supported aluminum-substituted goethite (BAG). The results showed that an increase in the initial Al/(Al + Fe) atomic ratio for BAGs from 0 to 20% decreased the specific surface area from 115.2 to 75.7 m2/g, but enhanced the surface charge density from 0.0180 to 0.0843 C/m2. By comparison, 10% of Al/(Al + Fe) led to the optimal adsorbent for nitrate removal. The adsorbent’s adsorption capacity was effective with a wide pH range (4–8), and decreased with increasing ionic strength. The descending order of nitrate adsorption inhibition by co-existing anions was SO42−, HCO3−, PO43−, and Cl−. The adsorption kinetics and isotherms agreed well with the pseudo-first-order equation and Langmuir model, respectively. The theoretical maximum adsorption capacity was 96.1469 mg/g. Thermodynamic analysis showed that the nitrate adsorption was spontaneous and endothermic. After 10-cycle regeneration, the BAG still kept 92.6% of its original adsorption capacity for synthetic nitrate-contaminated groundwater. Moreover, the main adsorption mechanism was attributed to electrostatic attraction due to the enhancement of surface charge density by Al substitution. Accordingly, the BAG adsorbent is a potential solution to remove nitrate from groundwater.
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13
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Review: Brine Solution: Current Status, Future Management and Technology Development. SUSTAINABILITY 2022. [DOI: 10.3390/su14116752] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/04/2023]
Abstract
Desalination brine is extremely concentrated saline water; it contains various salts, nutrients, heavy metals, organic contaminants, and microbial contaminants. Conventional disposal of desalination brine has negative impacts on natural and marine ecosystems that increase the levels of toxicity and salinity. These issues demand the development of brine management technologies that can lead to zero liquid discharge. Brine management can be productive by adopting economically feasible methodologies, which enables the recovery of valuable resources like freshwater, minerals, and energy. This review focuses on the recent advances in brine management using various membrane/thermal-based technologies and their applicability in water, mineral, and energy recoveries, considering their pros and cons. This review also exemplifies the hybrid processes for metal recovery and zero liquid discharge that may be adopted, so far, as an appropriate futuristic strategy. The data analyzed and outlook presented in this review could definitely contribute to the development of economically achievable future strategies for sustainable brine management.
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14
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Liu Z, Solliec M, Papineau I, Lompe KM, Mohseni M, Bérubé PR, Sauvé S, Barbeau B. Elucidating the removal of organic micropollutants on biological ion exchange resins. THE SCIENCE OF THE TOTAL ENVIRONMENT 2022; 808:152137. [PMID: 34864032 DOI: 10.1016/j.scitotenv.2021.152137] [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: 07/17/2021] [Revised: 11/14/2021] [Accepted: 11/28/2021] [Indexed: 06/13/2023]
Abstract
Biological ion exchange (BIEX) refers to operating ion exchange (IX) filters with infrequent regeneration to favor the microbial growth on resin surface and thereby contribute to the removal of organic matter through biodegradation. However, the extent of biodegradation on BIEX resins is still debatable due to the difficulty in discriminating between biodegradation and IX. The objective of the present study was to evaluate the performance of BIEX resins for the removal of organic micropollutants and thereby validate the occurrence of biodegradation. The removals of biodegradable micropollutants (neutral: caffeine and estradiol; negative: ibuprofen and naproxen) and nonbiodegradable micropollutants with different charges (neutral: atrazine and thiamethoxam; negative: PFOA and PFOS) were respectively monitored during batch tests with biotic and abiotic BIEX resins. Results demonstrated that biodegradation contributed to the removal of caffeine, estradiol, and ibuprofen, confirming that biodegradation occurred on the BIEX resins. Furthermore, biodegradation contributed to a lower extent to the removal of naproxen probably due to the absence of an adapted bacterial community (Biotic: 49% vs Abiotic: 38% after 24 h batch test). The removal of naproxen, PFOS, and PFOA were attributable to ion exchange with previously retained natural organic matter on BIEX resins. Nonbiodegradable and neutral micropollutants (atrazine and thiamethoxam) were minimally (6%-10%) removed during the batch tests. Overall, the present study corroborates that biomass found on BIEX resins contribute to the removal of micropollutants through biodegradation and ion exchange resins can be used as biomass support for biofiltration.
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Affiliation(s)
- Zhen Liu
- Department of Chemistry, Université de Montréal, Montréal, QC H2V 0B3, Canada; NSERC-Industrial Chair on Drinking Water, Department of Civil, Mining and Geological Engineering, Polytechnique Montréal, Montréal, QC H3T 1J4, Canada.
| | - Morgan Solliec
- NSERC-Industrial Chair on Drinking Water, Department of Civil, Mining and Geological Engineering, Polytechnique Montréal, Montréal, QC H3T 1J4, Canada.
| | - Isabelle Papineau
- NSERC-Industrial Chair on Drinking Water, Department of Civil, Mining and Geological Engineering, Polytechnique Montréal, Montréal, QC H3T 1J4, Canada.
| | - Kim M Lompe
- Department of Water Management, Delft University of Technology, 2600 GA Delft, the Netherlands.
| | - Madjid Mohseni
- Department of Chemical and Biological Engineering, University of British Columbia, Vancouver, BC V6T 1Z4, Canada.
| | - Pierre R Bérubé
- Department of Civil Engineering, University of British Columbia, Vancouver, BC V6T 1Z4, Canada.
| | - Sébastien Sauvé
- Department of Chemistry, Université de Montréal, Montréal, QC H2V 0B3, Canada.
| | - Benoit Barbeau
- NSERC-Industrial Chair on Drinking Water, Department of Civil, Mining and Geological Engineering, Polytechnique Montréal, Montréal, QC H3T 1J4, Canada.
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15
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Yang Q, Xu L, He Q, Wu D. Reduced cathodic scale and enhanced electrochemical precipitation of Ca 2+ and Mg 2+ by a novel fenced cathode structure: Formation of strong alkaline microenvironment and favorable crystallization. WATER RESEARCH 2022; 209:117893. [PMID: 34872026 DOI: 10.1016/j.watres.2021.117893] [Citation(s) in RCA: 10] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/07/2021] [Revised: 11/17/2021] [Accepted: 11/19/2021] [Indexed: 06/13/2023]
Abstract
Electrochemical precipitation is a promising technique for hardness abatement without the addition of external ions. However, the scale layer on cathode deteriorated the removal efficiency and limited the practical application. Herein, a fenced cathode structure was designed to prevent cathodic precipitation. The cathode was fenced by a crystallization-inducing material for separating the OH- production and crystallization processes. Precipitation on the cathode was confirmed to shift to the crystallization-inducing material, and the clean fenced cathode provided efficient long-term OH- production. At a current density of 40 A/m2, the Ca2+ or Mg2+ removal efficiency increased by 12.8% or 46.1%, respectively, compared to those of a traditional cathode. Thermodynamic equilibrium in synthetic water and mine water, mass transfer and the location of precipitation were analyzed to elucidate the electrochemical precipitation process. The enhanced mechanism was ascribed to the crystallization-inducing material, which remarkably promoted the crystallization process, and hindered OH- migration, thereby increased the pH of alkaline microenvironment. Notably, a recovery design was proposed to recover pure calcite and brucite from alkalinity-free wastewater. The design reveals a promising strategy for enhancing the crystallization process and reducing cathodic scale, also initiating a new research direction toward hardness removal.
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Affiliation(s)
- Qianyuan Yang
- State Key Laboratory of Pollution Control and Resources Reuse, College of Environmental Science & Engineering, Tongji University, Shanghai 200092, PR China
| | - Longqian Xu
- State Key Laboratory of Pollution Control and Resources Reuse, College of Environmental Science & Engineering, Tongji University, Shanghai 200092, PR China
| | - Qunbiao He
- State Key Laboratory of Pollution Control and Resources Reuse, College of Environmental Science & Engineering, Tongji University, Shanghai 200092, PR China
| | - Deli Wu
- State Key Laboratory of Pollution Control and Resources Reuse, College of Environmental Science & Engineering, Tongji University, Shanghai 200092, PR China.
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