901
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Contaminants of Emerging Concern Removal by High-Energy Oxidation-Reduction Processes: State of the Art. APPLIED SCIENCES-BASEL 2019. [DOI: 10.3390/app9214562] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Abstract
The presence of ‘emerging contaminants’, i.e., chemicals yet without a regulatory status and poorly understood impact on human health and environment, in wastewater and aquatic environments is widely reported. No established technology, to date, can simultaneously and completely remove all these contaminants, even though some Advanced Oxidation Processes (AOPs,) have demonstrated capacity for some degradation of these compounds. High-energy, radiolytic processing of water matrices using various sources: electron beam (EB), ɣ-rays or non-thermal plasma (NTP) have shown excellent results in many applications, although these remain at the moment isolated examples and scarcely known. High-energy irradiation constitutes an additive-free process that uses short-lived, highly reactive radicals (both oxidating and reducing) generated by water radiolysis, which can instantaneously decompose organic pollutants. Several studies have demonstrated its effectiveness, as a stand-alone process or combined with others, in the rapid decomposition (up to complete mineralization) of organic compounds in pure and complex solutions, and in the removal or inactivation of microorganisms and parasites, without production of leftover residual compounds in solution. High-energy oxidation processes (a.k.a. Advanced Oxidation & Reduction Processes—AORPs) could have a primary role in future strategies addressing emerging contaminants.
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902
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Bergamonti L, Bergonzi C, Graiff C, Lottici PP, Bettini R, Elviri L. 3D printed chitosan scaffolds: A new TiO 2 support for the photocatalytic degradation of amoxicillin in water. WATER RESEARCH 2019; 163:114841. [PMID: 31306940 DOI: 10.1016/j.watres.2019.07.008] [Citation(s) in RCA: 50] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/08/2019] [Revised: 06/26/2019] [Accepted: 07/03/2019] [Indexed: 06/10/2023]
Abstract
TiO2-supported chitosan scaffolds (TiO2/CS) are here proposed as promising material for wastewater treatment, in particular for the removal of pharmaceutical compounds. TiO2/CS are tested for the amoxicillin photodegradation under UV/Vis irradiation. Amoxicillin (AMX) is an antibiotic of the beta-lactam family. Due to the release of antibiotics in wastewater and their persistence in the environment, harmful effects can develop on the aquatic and terrestrial organisms. TiO2 chitosan scaffolds with photocatalytic activity for wastewater remediation have been prepared by 3D printing using commercial P25-TiO2. The formulation for the 3D printer was prepared by dispersion of chitosan and TiO2 in powder form at the concentration 6% w/v and 1% w/v, respectively. The TiO2 particles (crystalline anatase and rutile phases) embedded in the chitosan have a size of about 20 nm, like in the starting material, as verified by X-ray diffraction and Raman spectroscopy and are homogeneously distributed in the scaffold, also after repeated photocatalytic tests, as revealed by SEM-EDS. The mechanical properties of the 3D structures are suitable for the targeted application as they can be easily handled without breakage. The AMX photodegradation efficiency under light irradiation by TiO2/CS made with scaffolds of different thicknesses (3, 5, 15 layers), was assessed in water by means of UV-Vis absorption and HPLC/UV measurements, at two different AMX:TiO2 molar ratios: 1/100 and 1/10. The 3D printed TiO2/CS system, even after repeated cycles, shows a high photodegradation efficiency, compared to the direct AMX photolysis. A zero-order kinetics for TiO2 supported photodegradation was found, whereas a pseudo-first order was observed for water dispersed TiO2. Mass spectrometry analysis revealed the presence of AMX degradates such as penilloic and penicilloic acids and diketopiperazine. The proposed 3D printed chitosan scaffolds may be used as reusable substrate for the TiO2 photocatalytic degradation of antibiotic pollutants in wastewater.
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Affiliation(s)
- Laura Bergamonti
- Department of Chemistry, Life Science and Environmental Sustainability, University of Parma, Parco Area delle Scienze 17/A, Parma, Italy
| | - Carlo Bergonzi
- Food and Drug Department, University of Parma, Parco Area delle Scienze 27/A, I-43124, Parma, Italy
| | - Claudia Graiff
- Department of Chemistry, Life Science and Environmental Sustainability, University of Parma, Parco Area delle Scienze 17/A, Parma, Italy.
| | - Pier Paolo Lottici
- Department of Mathematical, Physical and Computer Sciences, University of Parma, Parco Area delle Scienze 7/A, Parma, Italy
| | - Ruggero Bettini
- Food and Drug Department, University of Parma, Parco Area delle Scienze 27/A, I-43124, Parma, Italy
| | - Lisa Elviri
- Food and Drug Department, University of Parma, Parco Area delle Scienze 27/A, I-43124, Parma, Italy
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903
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Raschitor A, Llanos J, Rodrigo MA, Cañizares P. Combined electrochemical processes for the efficient degradation of non-polar organochlorine pesticides. JOURNAL OF ENVIRONMENTAL MANAGEMENT 2019; 248:109289. [PMID: 31344559 DOI: 10.1016/j.jenvman.2019.109289] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/12/2019] [Revised: 07/11/2019] [Accepted: 07/15/2019] [Indexed: 06/10/2023]
Abstract
This study deals with the development of efficient and economic electrochemical treatment processes to confront the treatment of liquid wastes containing non-polar organochlorine pesticides. In previous works, it was demonstrated that it is possible to use electrocoagulation (EC) as a concentration technique for a model organochlorine pesticide (oxyfluorfen). Within this framework, the present work describes a process for the degradation of wastes containing non-polar organochlorines (oxyfluorfen or lindane) in two consecutive stages: 1) a first stage of concentration by electrocoagulation; 2) a second stage of electrochemical degradation by electro-oxidation (EO) or electro-Fenton (EF). The first result reached in the present work is that it is possible to remove close to 50% of both pollutants using EO and more that 94% using EF. Additionally, it was proved that the addition of a pre-concentration stage decreases by a factor of 20 the power consumption needed to deplete by EO the same amount of the initial pollutant. Moreover, when EF process is performed to the concentrated stream, the power consumption is further reduced, getting values (for 1-log removal) as low as 14.51 kWh m-3 for oxyfluorfen decrease and 49.7 kWh m-3 for lindane. These results strengthen the fact that the removal efficiency increases with the concentration of the pollutant and demonstrate that the combination of concentration steps and electrochemical degradation technologies is an efficient and promising alternative for the degradation of non-polar organochlorines.
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Affiliation(s)
- A Raschitor
- Department of Chemical Engineering, Faculty of Chemical Sciences & Technologies, Ciudad Real, Universidad de Castilla-La Mancha, Ciudad Real 13071, Spain
| | - J Llanos
- Department of Chemical Engineering, Faculty of Chemical Sciences & Technologies, Ciudad Real, Universidad de Castilla-La Mancha, Ciudad Real 13071, Spain.
| | - M A Rodrigo
- Department of Chemical Engineering, Faculty of Chemical Sciences & Technologies, Ciudad Real, Universidad de Castilla-La Mancha, Ciudad Real 13071, Spain
| | - P Cañizares
- Department of Chemical Engineering, Faculty of Chemical Sciences & Technologies, Ciudad Real, Universidad de Castilla-La Mancha, Ciudad Real 13071, Spain
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904
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Heterogeneous Catalytic Performance and Stability of Iron-Loaded ZSM-5, Zeolite-A, and Silica for Phenol Degradation: A Microscopic and Spectroscopic Approach. Catalysts 2019. [DOI: 10.3390/catal9100859] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/18/2023] Open
Abstract
In this study, we compared the performances of three iron-containing crystalline and amorphous catalysts, that is, Fe-Zeo-A, Fe-ZSM-5, and Fe-silica, respectively, for the degradation of phenol in an aqueous solution. Catalytic activity for the degradation of phenol was assessed by heterogeneous photolysis, Fenton, and photo-Fenton oxidation. All catalysts exhibited higher activity in the photo-Fenton process. In addition, the catalyst stability was evaluated by the estimation of the iron loss and structural variations after the oxidation processes. Results revealed that Fe-silica and Fe-ZSM-5 exhibit higher catalytic activity (~100% phenol removal), while only 64% of phenol removal over Fe-Zeo-A was observed. Moreover, among all catalysts, Fe-ZSM-5 exhibited higher stability with low iron leaching, attributed to the uniform distribution of bonded Fe in the crystalline framework and narrow channels. On the contrary, amorphous Fe-silica exhibited higher iron leaching due to the presence of isolated iron species in the structure, leading to the partial involvement of a homogeneous reaction during the degradation of phenol. The structural stability of Fe-based catalysts was examined using microscopic and spectroscopic techniques.
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905
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Fabrication of novel g-C3N4 nanosheet/carbon dots/Ag6Si2O7 nanocomposites with high stability and enhanced visible-light photocatalytic activity. J Taiwan Inst Chem Eng 2019. [DOI: 10.1016/j.jtice.2019.07.018] [Citation(s) in RCA: 53] [Impact Index Per Article: 10.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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906
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Piai L, Dykstra JE, Adishakti MG, Blokland M, Langenhoff AAM, van der Wal A. Diffusion of hydrophilic organic micropollutants in granular activated carbon with different pore sizes. WATER RESEARCH 2019; 162:518-527. [PMID: 31277934 DOI: 10.1016/j.watres.2019.06.012] [Citation(s) in RCA: 50] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/14/2019] [Revised: 05/09/2019] [Accepted: 06/05/2019] [Indexed: 05/11/2023]
Abstract
Hydrophilic organic micropollutants are commonly detected in source water used for drinking water production. Effective technologies to remove these micropollutants from water include adsorption onto granular activated carbon in fixed-bed filters. The rate-determining step in adsorption using activated carbon is usually the adsorbate diffusion inside the porous adsorbent. The presence of mesopores can facilitate diffusion, resulting in higher adsorption rates. We used two different types of granular activated carbon, with and without mesopores, to study the adsorption rate of hydrophilic micropollutants. Furthermore, equilibrium studies were performed to determine the affinity of the selected micropollutants for the activated carbons. A pore diffusion model was applied to the kinetic data to obtain pore diffusion coefficients. We observed that the adsorption rate is influenced by the molecular size of the micropollutant as well as the granular activated carbon pore size.
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Affiliation(s)
- Laura Piai
- Environmental Technology, Wageningen University & Research, P.O. Box 17, 6700 AA Wageningen, The Netherlands
| | - Jouke E Dykstra
- Environmental Technology, Wageningen University & Research, P.O. Box 17, 6700 AA Wageningen, The Netherlands
| | - Mahesa G Adishakti
- Environmental Technology, Wageningen University & Research, P.O. Box 17, 6700 AA Wageningen, The Netherlands
| | - Marco Blokland
- Wageningen Food Safety Research, Wageningen University & Research, P.O. Box 230, 6708 WB Wageningen, The Netherlands
| | - Alette A M Langenhoff
- Environmental Technology, Wageningen University & Research, P.O. Box 17, 6700 AA Wageningen, The Netherlands.
| | - Albert van der Wal
- Environmental Technology, Wageningen University & Research, P.O. Box 17, 6700 AA Wageningen, The Netherlands; Evides Water Company, P.O. Box 4472, 3006 AL, Rotterdam, The Netherlands
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907
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Double benefit of electrochemical techniques: Treatment and electroanalysis for remediation of water polluted with organic compounds. Electrochim Acta 2019. [DOI: 10.1016/j.electacta.2019.134628] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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908
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Xie P, Zou Y, Jiang S, Wang Z, Wang J, Zhang L, Yue S, Feng X. Application of vacuum-ultraviolet (VUV) to degrade β-blocker propranolol in aquatic environment: Efficiency, kinetics, pathways and acute toxicity. J Taiwan Inst Chem Eng 2019. [DOI: 10.1016/j.jtice.2019.07.011] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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909
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Xie P, Zou Y, Jiang S, Wang J, Zhang L, Wang Z, Yue S, Feng X. Degradation of imipramine by vacuum ultraviolet (VUV) system: Influencing parameters, mechanisms, and variation of acute toxicity. CHEMOSPHERE 2019; 233:282-291. [PMID: 31176129 DOI: 10.1016/j.chemosphere.2019.05.201] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/21/2019] [Revised: 05/08/2019] [Accepted: 05/22/2019] [Indexed: 06/09/2023]
Abstract
Degradation of imipramine (IMI) in the VUV system (VUV185 + UV254) was firstly evaluated in this study. Both HO• oxidation and UV254 direct photolysis accounted for IMI degradation. The quantum yields of UV254 direct photolysis of deprotonated and protonated IMI were 1.31×10-2 and 3.31×10-3, respectively, resulting in the higher degradation efficiency of IMI at basic condition. Increasing the initial IMI concentration lowered the degradation efficiency of IMI. While elevating reaction temperature significantly improved IMI degradation efficiency through the promotion of both the quantum yields of HO• and the UV254 direct photolysis rate. The apparent activation energy was calculated to be about 26.6 kJ mol-1. Negative-linear relationships between the kobs of IMI degradation and the concentrations of HCO3-/CO32-, NOM and Cl- were obtained. The degradation pathways were proposed that cleavage of side chain and hydroxylation of iminodibenzyl and methyl groups were considered as the initial steps for IMI degradation in the VUV system. Although some high toxic intermediate products would be produced, they can be further transformed to other lower toxic products. The good degradation efficiency of IMI under realistic water matrices further suggests that the VUV system would be a good method to degrade IMI in aquatic environment.
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Affiliation(s)
- Pengchao Xie
- School of Environmental Science and Engineering, Huazhong University of Science and Technology (HUST), Wuhan, 430074, China; Center for the Environmental Implications of Nanotechnology (CEINT), Durham, 27708-0287, USA
| | - Yujia Zou
- School of Environmental Science and Engineering, Huazhong University of Science and Technology (HUST), Wuhan, 430074, China
| | - Shan Jiang
- School of Environmental Science and Engineering, Huazhong University of Science and Technology (HUST), Wuhan, 430074, China
| | - Jingwen Wang
- School of Environmental Science and Engineering, Huazhong University of Science and Technology (HUST), Wuhan, 430074, China
| | - Li Zhang
- School of Environmental Science and Engineering, Huazhong University of Science and Technology (HUST), Wuhan, 430074, China
| | - Zongping Wang
- School of Environmental Science and Engineering, Huazhong University of Science and Technology (HUST), Wuhan, 430074, China
| | - Siyang Yue
- School of Architecture & Urban Planning, Huazhong University of Science and Technology (HUST), Wuhan, 430074, China
| | - Xiaonan Feng
- School of Environmental Science and Engineering, Huazhong University of Science and Technology (HUST), Wuhan, 430074, China.
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910
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Bello MM, Y’ng TS, Abdul Raman AA. Response surface methodology optimization of integrated fluidized bed adsorption–Fenton oxidation for removal of Reactive Black 5. CHEM ENG COMMUN 2019. [DOI: 10.1080/00986445.2019.1666109] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Affiliation(s)
- Mustapha Mohammed Bello
- Department of Chemical Engineering, Faculty of Engineering, University of Malaya, Kuala Lumpur, Malaysia
| | - Tiew Shin Y’ng
- Department of Chemical Engineering, Faculty of Engineering, University of Malaya, Kuala Lumpur, Malaysia
| | - Abdul Aziz Abdul Raman
- Department of Chemical Engineering, Faculty of Engineering, University of Malaya, Kuala Lumpur, Malaysia
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911
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Long L, Bu Y, Chen B, Sadiq R. Removal of urea from swimming pool water by UV/VUV: The roles of additives, mechanisms, influencing factors, and reaction products. WATER RESEARCH 2019; 161:89-97. [PMID: 31181450 DOI: 10.1016/j.watres.2019.05.098] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/25/2019] [Revised: 05/05/2019] [Accepted: 05/29/2019] [Indexed: 06/09/2023]
Abstract
To discover an applicable technology for urea abatement from swimming pool water (SPW), this study compared the performances of seven ultraviolet (UV)-based technologies on urea removal, including UV alone, UV coupled with hydrogen peroxide (UV/H2O2), sulfite (UV/Na2SO3), potassium persulfate (UV/K2S2O8), a combination of UV and vacuum UV (UV/VUV), and UV/VUV in tandem with either H2O2 (VUV/H2O2) or potassium persulfate (VUV/K2S2O8). Among them, UV and UV/Na2SO3 showed little removal ability, and UV/H2O2 removed only 12.8% of urea within 3-h experiments, while UV/VUV degraded 71.7% of urea without introducing substantial total dissolved solids (TDS). Therefore, UV/VUV was considered as a promising technology for further exploration. In comparison, although UV/K2S2O8 exhibited higher urea removal than UV/VUV, it caused dramatic increases of TDS, which made the regulatory threshold for the TDS increment difficult to maintain. Within UV/VUV studies, some common components in SPW (e.g., cyanuric acid, humic acid, nitrate, and bicarbonate) inhibited the removal process, whereas chloride and sulfate facilitated it, while free chlorine at doses ≤ 3 mg-Cl2/L and pH levels from 6.8 to 8.0 imposed little impact on urea degradation. Overall, UV/VUV degraded 40.0% and 22.2% of urea from tap water and SPW, respectively; both were lower than the efficiency observed in ultrapure water. As for reaction byproducts, urea phototransformation via UV/VUV yielded nitrate and ammonia as the key products with the mass balance of nitrogen element being met. However, the contents of organic carbon decreased at a rate slightly lower than urea degradation, suggesting that urea was mostly mineralized and slightly converted to unknown organic compounds. The results hence demonstrate that UV/VUV is an effective alternative for urea removal from SPW.
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Affiliation(s)
- Liangchen Long
- Shenzhen Key Laboratory of Organic Pollution Prevention and Control of Harbin Institute of Technology, Shenzhen, 518055, China
| | - Yinan Bu
- Shenzhen Key Laboratory of Organic Pollution Prevention and Control of Harbin Institute of Technology, Shenzhen, 518055, China
| | - Baiyang Chen
- Shenzhen Key Laboratory of Organic Pollution Prevention and Control of Harbin Institute of Technology, Shenzhen, 518055, China.
| | - Rehan Sadiq
- School of Engineering, University of British Columbia Okanagan Campus, Kelowna, BC, V1V1V7, Canada
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912
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Kim HC, Park SH, Noh JH, Choi J, Lee S, Maeng SK. Comparison of pre-oxidation between O 3 and O 3/H 2O 2 for subsequent managed aquifer recharge using laboratory-scale columns. JOURNAL OF HAZARDOUS MATERIALS 2019; 377:290-298. [PMID: 31173978 DOI: 10.1016/j.jhazmat.2019.05.099] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/15/2019] [Revised: 05/20/2019] [Accepted: 05/29/2019] [Indexed: 06/09/2023]
Abstract
A hybrid process of managed aquifer recharge with pre-oxidation was investigated as part of a multiple-barrier approach for safe water production. This study evaluated O3 and O3/H2O2 for the pre-oxidation of urban surface water prior to managed aquifer recharge (MAR) and compared their effectiveness with respect to trace organic contaminants (TrOCs), biostability, and trihalomethane formation potential. The combination of pre-oxidation and MAR was performed using long-term column studies, and the results confirmed the removal of 64 and 56% dissolved organic carbon by using O3 and O3/H2O2, respectively. MAR combined with O3 and O3/H2O2 achieved >50% removal of dissolved organic carbon with the first 5 days of residence time. O3 alone showed better performance in alleviating trihalomethane formation potential during chlorination compared to using O3/H2O2. The pre-oxidation of urban surface water was effective in attenuating selected TrOCs (35 - >99% removal), and subsequent MAR achieved >99% removal of selected TrOCs within the first 5 days, regardless of pretreatment methods examined in this study. The results of this study provide an understanding of the effects of O3 and O3/H2O2 as pre-oxidation processes on urban surface water prior to MAR, as well as the resulting impact on MAR.
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Affiliation(s)
- Hyun-Chul Kim
- Research Institute for Advanced Industrial Technology, College of Science and Technology, Korea University, 2511 Sejong-ro, Sejong, 30019, Republic of Korea
| | - Se Hee Park
- Department of Civil and Environmental Engineering, Sejong University, 209 Neungdongro, Gwangjin-gu, Seoul, 05006, Republic of Korea
| | - Jin Hyung Noh
- Department of Civil and Environmental Engineering, Sejong University, 209 Neungdongro, Gwangjin-gu, Seoul, 05006, Republic of Korea
| | - Jaewon Choi
- Water Quality & Safety Research Center, K-water Institute, Shintanjin-Ro 200, Daeduck-Gu, Daejeon, 34350, Republic of Korea
| | - Seunghak Lee
- Water Cycle Research Center, National Agenda Research Division, Korea Institute of Science and Technology, 5, Hwarang-ro 14-gil, Seongbuk-gu, Seoul, 02792, Republic of Korea
| | - Sung Kyu Maeng
- Department of Civil and Environmental Engineering, Sejong University, 209 Neungdongro, Gwangjin-gu, Seoul, 05006, Republic of Korea.
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913
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Chen F, Zeng S, Ma J, Zhu Q, Zhang S. Treatment of chlorpyrifos manufacturing wastewater by peroxide promoted-catalytic wet air oxidation, struvite precipitation, and biological aerated biofilter. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2019; 26:26721-26732. [PMID: 31292882 DOI: 10.1007/s11356-019-05896-3] [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: 01/18/2019] [Accepted: 07/03/2019] [Indexed: 06/09/2023]
Abstract
Chlorpyrifos manufacturing wastewater (CMW) is characterized by complex composition, high chemical oxygen demand (COD) concentration, and toxicity. An integrated process comprising of peroxide (H2O2) promoted-catalytic wet air oxidation (PP-CWAO), struvite precipitation, and biological aerated filters (BAF) was constructed to treat CMW at a starting COD of 34000-35000 mg/L, total phosphorus (TP) of 5550-5620 mg/L, and total organophosphorus (TOP) of 4700-4840 mg/L. Firstly, PP-CWAO was used to decompose high concentrations of organic components and convert concentrated and recalcitrant TOP to inorganic phosphate. Copper citrate and ferrous citrate were used as the catalysts of PP-CWAO. Under the optimized conditions, 100% TOP was converted to inorganic phosphate with 95.6% COD removal. Then, the PP-CWAO effluent was subjected to struvite precipitation process for recovering phosphorus. At a molar ratio of Mg2+:NH4+:PO43- = 1.1:1.0:1.0, phosphate removal and recovery reached 97.2%. The effluent of struvite precipitation was further treated by the BAF system. Total removals of 99.0%, 95.2%, 97.3%, 100%, and 98.3% were obtained for COD, total suspended solids, TP, TOP, and chroma, respectively. This hybrid process has proved to be an efficient approach for organophosphate pesticide wastewater treatment and phosphorus reclamation.
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Affiliation(s)
- Fu Chen
- Low Carbon Energy Institute, China University of Mining and Technology, Xuzhou, 221008, Jiangsu, China
- School of Environment Science and Spatial Informatics, China University of Mining and Technology, Xuzhou, 221008, Jiangsu, China
| | - Siyan Zeng
- School of Environment Science and Spatial Informatics, China University of Mining and Technology, Xuzhou, 221008, Jiangsu, China
| | - Jing Ma
- Low Carbon Energy Institute, China University of Mining and Technology, Xuzhou, 221008, Jiangsu, China.
- Amap, Inra, Cnrs, Ird, Cirad, University of Montpellier, Boulevard de la Lironde, 34398, Montpellier Cedex 5, France.
| | - Qianlin Zhu
- School of Environment Science and Spatial Informatics, China University of Mining and Technology, Xuzhou, 221008, Jiangsu, China
| | - Shaoliang Zhang
- Low Carbon Energy Institute, China University of Mining and Technology, Xuzhou, 221008, Jiangsu, China
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914
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Jiao J, Wan J, Ma Y, Wang Y. Enhanced photocatalytic activity of AgNPs-in-CNTs with hydrogen peroxide under visible light irradiation. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2019; 26:26389-26396. [PMID: 31292864 DOI: 10.1007/s11356-019-05877-6] [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: 03/08/2019] [Accepted: 07/01/2019] [Indexed: 06/09/2023]
Abstract
Silver nanoparticles in carbon nanotubes (AgNPs-in-CNTs) were prepared through a simple thermal decomposition method. Synthesized AgNPs-in-CNTs were characterized by X-ray diffraction (XRD), UV-vis diffuse reflectance spectroscopy, high-resolution transmission electron microscopy (HRTEM), and X-ray photoelectron spectroscopy (XPS). In the presence of hydrogen peroxide (H2O2), AgNPs-in-CNTs exhibited perfect photocatalytic activity in rhodamine B (RhB) degradation under visible light irradiation. Hydrogen peroxide (H2O2) concentration and initial pH values were comprehensively scrutinized. When the concentration of H2O2 was 20 mM, about 99.8% RhB (20 mg L-1) could be degraded within 50 min while the initial pH (3-10) values had a negligible effect on the degradation. From the investigations of Raman spectroscopy, transient photocurrent responses, photoluminescence, and radical quenching experiments, the findings suggest that under light irradiation, AgNPs-in-CNTs can absorb photons and generate photogenerated electrons through localized surface plasmon resonance (LSPR) effect, the photogenerated electrons react with H2O2 to produce ·OH radicals for decomposing RhB.
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Affiliation(s)
- Jianli Jiao
- School of Environment and Energy, South China University of Technology, 382 Zhonghuan Road East, Guangzhou Higher Education Mega Centre, Guangzhou, Panyu District, 510006, People's Republic of China
- Guangdong Plant Fiber High-Valued Cleaning Utilization Engineering Technology Research Center, South China University of Technology, 381 Wushan Road, Tianhe District, Guangzhou, 510641, People's Republic of China
| | - Jinquan Wan
- School of Environment and Energy, South China University of Technology, 382 Zhonghuan Road East, Guangzhou Higher Education Mega Centre, Guangzhou, Panyu District, 510006, People's Republic of China.
- Guangdong Plant Fiber High-Valued Cleaning Utilization Engineering Technology Research Center, South China University of Technology, 381 Wushan Road, Tianhe District, Guangzhou, 510641, People's Republic of China.
| | - Yongwen Ma
- School of Environment and Energy, South China University of Technology, 382 Zhonghuan Road East, Guangzhou Higher Education Mega Centre, Guangzhou, Panyu District, 510006, People's Republic of China
- Guangdong Plant Fiber High-Valued Cleaning Utilization Engineering Technology Research Center, South China University of Technology, 381 Wushan Road, Tianhe District, Guangzhou, 510641, People's Republic of China
| | - Yan Wang
- School of Environment and Energy, South China University of Technology, 382 Zhonghuan Road East, Guangzhou Higher Education Mega Centre, Guangzhou, Panyu District, 510006, People's Republic of China
- Guangdong Plant Fiber High-Valued Cleaning Utilization Engineering Technology Research Center, South China University of Technology, 381 Wushan Road, Tianhe District, Guangzhou, 510641, People's Republic of China
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915
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Majumder A, Gupta B, Gupta AK. Pharmaceutically active compounds in aqueous environment: A status, toxicity and insights of remediation. ENVIRONMENTAL RESEARCH 2019; 176:108542. [PMID: 31387068 DOI: 10.1016/j.envres.2019.108542] [Citation(s) in RCA: 90] [Impact Index Per Article: 18.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/29/2019] [Revised: 06/12/2019] [Accepted: 06/17/2019] [Indexed: 05/22/2023]
Abstract
Pharmaceutically active compounds (PhACs) have pernicious effects on all kinds of life forms because of their toxicological effects and are found profoundly in various wastewater treatment plant influents, hospital effluents, and surface waters. The concentrations of different pharmaceuticals were found in alarmingly high concentrations in various parts of the globe, and it was also observed that the concentration of PhACs present in the water could be eventually related to the socio-economic conditions and climate of the region. Drinking water equivalent limit for each PhAC has been calculated and compared with the occurrence data from various continents. Since these compounds are recalcitrant towards conventional treatment methods, while advanced oxidation processes (AOPs) have shown better efficiency in degrading these PhACs. The performance of the AOPs have been evaluated based on percentage removal, time, and electrical energy consumed to degrade different classes of PhACs. Ozone based AOPs were found to be favorable because of their low treatment time, low cost, and high efficiency. However, complete degradation cannot be achieved by these processes, and various transformation products are formed, which may be more toxic than the parent compounds. The various transformation products formed from various PhACs during treatment have been highlighted. Significant stress has been given on the role of various process parameters, water matrix, oxidizing radicals, and the mechanism of degradation. Presence of organic compounds, nitrate, and phosphate usually hinders the degradation process, while chlorine and sulfate showed a positive effect. The role of individual oxidizing radicals, interfering ions, and pH demonstrated dissimilar effects on different groups of PhACs.
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Affiliation(s)
- Abhradeep Majumder
- School of Environmental Science and Engineering, Indian Institute of Technology Kharagpur, Kharagpur, 721302, India.
| | - Bramha Gupta
- School of Water Resources, Indian Institute of Technology Kharagpur, Kharagpur, 721302, India.
| | - Ashok Kumar Gupta
- Environmental Engineering Division, Department of Civil Engineering, Indian Institute of Technology Kharagpur, Kharagpur, 721302, India.
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916
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Wang C, Cao Y, Wang H. Copper-based catalyst from waste printed circuit boards for effective Fenton-like discoloration of Rhodamine B at neutral pH. CHEMOSPHERE 2019; 230:278-285. [PMID: 31108438 DOI: 10.1016/j.chemosphere.2019.05.068] [Citation(s) in RCA: 28] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/05/2019] [Revised: 05/08/2019] [Accepted: 05/09/2019] [Indexed: 06/09/2023]
Abstract
The carbonized waste printed circuit board (c-PCB) was used as novel copper-based catalyst for Fenton-like discoloration of Rhodamine B (RhB). The elemental ingredients, structure and morphology of the catalyst was investigated by multi-techniques. The catalytic activity of c-PCB for RhB discoloration was evaluated in the presence of H2O2, examining the factors of catalyst dosage, H2O2 dosage, solution pH, RhB concentration and temperature. RhB discoloration is improved with increasing catalyst dosage (0-2.0 g L-1), H2O2 dosage (0-0.15 mol L-1), solution pH (4.66-9.36) and temperature (30-50 °C). We found that c-PCB shows excellent catalytic activity for RhB discoloration in a broad pH range. RhB removal of 95.78% is obtained within 6 h at neutral pH (6.70). RhB discoloration is well described by the first-order kinetics, and the activation energy is calculated to be 87 kJ mol-1. The dominant role of OH radical in the c-PCB/H2O2 system is identified by quenching tests. The plausible pathway for RhB discoloration is discussed based on the time-dependent UV-vis spectra. The possible catalytic mechanism in the c-PCB/H2O2 system is also presented. Good reusability of c-PCB is verified by three cycles. This work opens a new strategy of "waste treating waste", facilitating management of hazardous solid wastes and cleaner treatment of textile wastewater.
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Affiliation(s)
- Chongqing Wang
- School of Chemical Engineering and Energy, Zhengzhou University, Zhengzhou, 450001, China
| | - Yijun Cao
- School of Chemical Engineering and Energy, Zhengzhou University, Zhengzhou, 450001, China.
| | - Hui Wang
- School of Chemistry and Chemical Engineering, Central South University, Changsha, 410083, China
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917
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Lv C, Liang H, Chen H, Wu L. Hydroxyapatite supported Co3O4 catalyst for enhanced degradation of organic contaminants in aqueous solution: Synergistic visible-light photo-catalysis and sulfate radical oxidation process. Microchem J 2019. [DOI: 10.1016/j.microc.2019.05.059] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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918
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Zhang S, Gu P, Ma R, Luo C, Wen T, Zhao G, Cheng W, Wang X. Recent developments in fabrication and structure regulation of visible-light-driven g-C3N4-based photocatalysts towards water purification: A critical review. Catal Today 2019. [DOI: 10.1016/j.cattod.2018.09.013] [Citation(s) in RCA: 199] [Impact Index Per Article: 39.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
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919
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Wang WL, Hu HY, Liu X, Shi HX, Zhou TH, Wang C, Huo ZY, Wu QY. Combination of catalytic ozonation by regenerated granular activated carbon (rGAC) and biological activated carbon in the advanced treatment of textile wastewater for reclamation. CHEMOSPHERE 2019; 231:369-377. [PMID: 31141739 DOI: 10.1016/j.chemosphere.2019.05.175] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/25/2019] [Revised: 05/15/2019] [Accepted: 05/20/2019] [Indexed: 06/09/2023]
Abstract
Wastewater reclamation in the textile industry has attracted considerable attention. In this study, catalytic ozonation by regenerated granular activated carbon (rGAC) and its combination with biological activated carbon (BAC) was investigated for the reclamation of a real bio-treated dyeing and finishing wastewater (BDFW). Catalytic ozonation by rGAC (O3/rGAC) was 1.6-2.0 times more efficient than ozonation alone for pollutants degradation. Although iron oxide loaded rGAC (rGAC-Fe) improved the performance of catalytic ozonation by 14%-25%, but was labile (<2 days) compared to stable rGAC (>20 days). Catalytic ozonation improved the generation of •OH, contributing 1.1-1.7 times faster of chromophores decomposition and 0.24-0.55 times more increase of biodegradability than ozonation. However, catalytic ozonation increased the acute toxicity of BDFW by two times. The combination of O3/rGAC and BAC can synergistically reduce COD, chromophores, and color in BDFW during 45-day's continuous operation, the improvements than O3/rGAC being 21.0%, 18.8%, and 13.6%, respectively. Moreover, although O3/rGAC of BDFW increased the toxicity from 98.3 to 146.5 μg-HgCl2/L, post BAC significantly reduced the toxicity to 13.1 μg-HgCl2/L. Engineering practice of water reclamation by O3/rGAC-BAC was approved to be feasible based on both the water quality of treated water and the operation cost.
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Affiliation(s)
- Wen-Long Wang
- Key Laboratory of Microorganism Application and Risk Control of Shenzhen, Guangdong Provincial Engineering Research Center for Urban Water Recycling and Environmental Safety, Graduate School at Shenzhen, Tsinghua University, Shenzhen, 518055, China; Environmental Simulation and Pollution Control State Key Joint Laboratory, State Environmental Protection Key Laboratory of Microorganism Application and Risk Control (SMARC), and School of Environment, Tsinghua University, Beijing, 100084, China
| | - Hong-Ying Hu
- Environmental Simulation and Pollution Control State Key Joint Laboratory, State Environmental Protection Key Laboratory of Microorganism Application and Risk Control (SMARC), and School of Environment, Tsinghua University, Beijing, 100084, China
| | - Xin Liu
- Key Laboratory of Microorganism Application and Risk Control of Shenzhen, Guangdong Provincial Engineering Research Center for Urban Water Recycling and Environmental Safety, Graduate School at Shenzhen, Tsinghua University, Shenzhen, 518055, China; Environmental Simulation and Pollution Control State Key Joint Laboratory, State Environmental Protection Key Laboratory of Microorganism Application and Risk Control (SMARC), and School of Environment, Tsinghua University, Beijing, 100084, China
| | - Hui-Xiang Shi
- College of Environment & Resource Sciences, Zhejiang University, Hangzhou, China
| | - Tian-Hui Zhou
- Key Laboratory of Microorganism Application and Risk Control of Shenzhen, Guangdong Provincial Engineering Research Center for Urban Water Recycling and Environmental Safety, Graduate School at Shenzhen, Tsinghua University, Shenzhen, 518055, China; Environmental Simulation and Pollution Control State Key Joint Laboratory, State Environmental Protection Key Laboratory of Microorganism Application and Risk Control (SMARC), and School of Environment, Tsinghua University, Beijing, 100084, China
| | - Chun Wang
- Environmental Simulation and Pollution Control State Key Joint Laboratory, State Environmental Protection Key Laboratory of Microorganism Application and Risk Control (SMARC), and School of Environment, Tsinghua University, Beijing, 100084, China
| | - Zheng-Yang Huo
- Environmental Simulation and Pollution Control State Key Joint Laboratory, State Environmental Protection Key Laboratory of Microorganism Application and Risk Control (SMARC), and School of Environment, Tsinghua University, Beijing, 100084, China
| | - Qian-Yuan Wu
- Key Laboratory of Microorganism Application and Risk Control of Shenzhen, Guangdong Provincial Engineering Research Center for Urban Water Recycling and Environmental Safety, Graduate School at Shenzhen, Tsinghua University, Shenzhen, 518055, China.
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920
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Seo C, Shin J, Lee M, Lee W, Yoom H, Son H, Jang S, Lee Y. Elimination efficiency of organic UV filters during ozonation and UV/H 2O 2 treatment of drinking water and wastewater effluent. CHEMOSPHERE 2019; 230:248-257. [PMID: 31103871 DOI: 10.1016/j.chemosphere.2019.05.028] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/24/2019] [Revised: 05/01/2019] [Accepted: 05/03/2019] [Indexed: 06/09/2023]
Abstract
The efficiency of elimination of organic UV filters by ozonation and UV254nm/H2O2 processes was assessed and predicted in simulated treatments of sewage-impaired drinking water and wastewater effluent in bench-scale experiments. Second-order rate constants (k) for the reactions of the eight UV filters with ozone and OH were determined by quantum chemical calculations and competition kinetics methods, respectively. The UV filters containing phenolic (ethylhexyl-salicylate, homosalate, and benzophenone-3) and olefinic moieties (4-methylbenzylidene-camphor, benzyl-cinnamate, and 2-ethylhexyl-4-methoxycinnamate) showed high ozone reactivity (k ≥ 8 × 104 M-1s-1 at pH 7), while those without such electron-rich moieties (isoamyl-benzoate and benzophenone) were ozone-refractory. All the UV filters showed high OH reactivity (k ≥ 6.2 × 109 M-1s-1). In concordance with the rate constant information, the phenolic and olefinic UV filters were efficiently eliminated by ozone treatment, requiring specific ozone doses of <0.5 mgO3/mgDOC for ∼100% elimination. The UV filters were eliminated by ≤ 38% at a UV fluence of 1500 mJ/cm2 in the UV254nm-only treatment. Rapid photoisomerisation between the E and Z geometric isomers was observed for the olefinic UV filter, benzyl-cinnamate. The addition of H2O2 (10 mg/L) greatly enhanced the elimination of all UV filters, indicating that OH was the main contributor to their elimination in the UV254nm/H2O2 treatment. A chemical kinetics approach developed previously for ozonation and UV/H2O2 processes was shown to predict the elimination of the UV filters in the tested water matrices reasonably well, demonstrating that the chemical kinetics method can be used for a priori prediction of micropollutant elimination in oxidative treatment processes for potable reuse of municipal wastewater effluents.
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Affiliation(s)
- Changdong Seo
- Busan Water Quality Institute, Busan, Republic of Korea; Department of Bioenvironmental Energy, Pusan National University, Pusan, Republic of Korea
| | - Jaedon Shin
- School of Earth Sciences and Environmental Engineering, Gwangju Institute of Science and Technology (GIST), Gwangju, Republic of Korea
| | - Minju Lee
- Department of Chemistry, University of Washington, Seattle, WA, USA
| | - Woongbae Lee
- School of Earth Sciences and Environmental Engineering, Gwangju Institute of Science and Technology (GIST), Gwangju, Republic of Korea
| | - Hoonsik Yoom
- Busan Water Quality Institute, Busan, Republic of Korea
| | - Heejong Son
- Busan Water Quality Institute, Busan, Republic of Korea
| | - Seongho Jang
- Department of Bioenvironmental Energy, Pusan National University, Pusan, Republic of Korea
| | - Yunho Lee
- School of Earth Sciences and Environmental Engineering, Gwangju Institute of Science and Technology (GIST), Gwangju, Republic of Korea.
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921
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Enhanced Photo-Catalytic Performance of Activated Carbon Fibers for Water Treatment. WATER 2019. [DOI: 10.3390/w11091794] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Abstract
The synthesis, characterization, and performance of composite photocatalytic adsorbents are investigated in this work using the dip-coating and the electrophoretic coating methods for the deposition of titanium dioxide (TiO2) on porous activated carbon fiber (ACF) substrates. The adsorption and photocatalytic efficiency of the synthesized catalytic adsorbents were compared using phenol as the model pollutant. Both immobilization techniques resulted in composite ACF/TiO2 adsorbents characterized by large surface area (844.67 ± 45.58 m2 g−1), uniform distribution of TiO2 nanoparticles on the activated carbon fibers, and high phenol adsorption. The method and the treatment time affected the phenol adsorption, while the highest sorption was determined in the case of the ACF/TiO2 sample prepared by the electrophoretic coating method (at 20 V) for an electrolysis time of 120 s (7.93 mgphenol g−1ACF/TiO2). The UV-A irradiation of most ACF/TiO2 samples led to a faster removal of phenol from water as a result of the combined sorption and heterogeneous photocatalysis. The stability and the effective regeneration of the most promising composite photocatalytic adsorbent was proved by multiple filtration and UV-A irradiation cycles.
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922
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Au/ZnO Hybrid Nanostructures on Electrospun Polymeric Mats for Improved Photocatalytic Degradation of Organic Pollutants. WATER 2019. [DOI: 10.3390/w11091787] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Abstract
An innovative approach for the fabrication of hybrid photocatalysts on a solid porous polymeric system for the heterogeneous photocatalytic degradation of organic pollutants is herein presented. Specifically, gold/zinc oxide (Au/ZnO)-based porous nanocomposites are formed in situ by a two-step process. In the first step, branched ZnO nanostructures fixed on poly(methyl methacrylate) (PMMA) fibers are obtained upon the thermal conversion of zinc acetate-loaded PMMA electrospun mats. Subsequently, Au nanoparticles (NPs) are directly formed on the surface of the ZnO through an adsorption dipping process and thermal treatment. The effect of different concentrations of the Au ion solutions to the formation of Au/ZnO hybrids is investigated, proving that for 1 wt % of Au NPs with respect to the composite there is an effective metal–semiconductor interfacial interaction. As a result, a significant improvement of the photocatalytic performance of the ZnO/PMMA electrospun nanocomposite for the degradation of methylene blue (MB) and bisphenol A (BPA) under UV light is observed. Therefore, the proposed method can be used to prepare flexible fibrous composites characterized by a high surface area, flexibility, and light weight. These can be used for heterogeneous photocatalytic applications in water treatment, without the need of post treatment steps for their removal from the treated water which may restrict their wide applicability and cause secondary pollution.
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923
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Ding Q, Lam FLY, Hu X. Complete degradation of ciprofloxacin over g-C 3N 4-iron oxide composite via heterogeneous dark Fenton reaction. JOURNAL OF ENVIRONMENTAL MANAGEMENT 2019; 244:23-32. [PMID: 31108307 DOI: 10.1016/j.jenvman.2019.05.035] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/10/2018] [Revised: 02/25/2019] [Accepted: 05/06/2019] [Indexed: 06/09/2023]
Abstract
Graphitic carbon nitride (g-C3N4) supported iron oxide (CN@IO) composite was first fabricated via synthesizing g-C3N4 in-situ onto iron oxide. The fabricated CN@IO composite was characterized by several techniques including XRD, XPS, TEM and nitrogen adsorption-desorption analysis. This composite was then used as a catalyst for the dark Fenton oxidative degradation of ciprofloxacin (CIP). Results demonstrated that the incorporation of g-C3N4 profoundly changed the structure and chemical properties of iron oxide, endowing CN@IO composites with high-efficient catalytic activity in dark Fenton system. In the synthesis process of CN@IO composites, iron oxide nanoparticles were successfully intercalated into the layers of g-C3N4, enlarging the surface area and thus providing more active sites for the reactions. Meanwhile, the existence of g-C3N4 can accelerate the Fe3+/Fe2+ redox cycle during the Fenton reaction, which further facilitated CIP degradation. In addition, the effects of reaction parameters, including pH, catalyst dosage, initial concentration of CIP and H2O2, on CIP degradation were investigated. Without any assistance of light irradiation, complete degradation and 48.5% mineralization of CIP were achieved under the best conditions of pH 3.0, 1 g/L CN@IO-2, 20 mg/L CIP and 0.0056 M H2O2. The trapping of iron oxide between g-C3N4 layers helped to stabilize iron oxide so the metal leaching problem that usually occurred in acidic media (pH = 3) can be effectively overcome. This work provides a new thought to develop environmental-friendly and high-efficient catalysts for the degradation of refractory pollutants in dark Fenton system, which is much easier to scale up for industrial application comparing with the photo-Fenton reaction.
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Affiliation(s)
- Qiqi Ding
- Department of Chemical and Biological Engineering, The Hong Kong University of Science and Technology, Hong Kong SAR
| | - Frank L Y Lam
- Department of Chemical and Biological Engineering, The Hong Kong University of Science and Technology, Hong Kong SAR
| | - Xijun Hu
- Department of Chemical and Biological Engineering, The Hong Kong University of Science and Technology, Hong Kong SAR.
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924
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Pang F, Lan D, Ge J. Core-Shell or Dimer Heterostructures? Synergistic Catalysis of an Advanced Oxidation Process at the Exposed Interface under Illumination. ACS APPLIED MATERIALS & INTERFACES 2019; 11:28996-29003. [PMID: 31339299 DOI: 10.1021/acsami.9b10790] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/21/2023]
Abstract
Carbonaceous materials are biocompatible and ecofriendly catalysts for an advanced oxidation process (AOP) in the treatment of wastewater, but their activity is not satisfactory compared to that of the conventional metal and oxide catalysts. Here, dimer heterostructures of ZnO and Ni,N-codoped carbon (NiNC) are found to possess greatly improved activity in a photoassisted AOP reaction. In the synthesis of the composite of ZnO and ZIF-8, the adding sequence of Ni(NO3)2 and 2-methylimidazole can guide the formation of ZnO@NiZIF and ZnO-NiZIF particles, which are further converted to a core-shell particle of ZnO and NiNC (ZnO@NiNC) and a dimer particle of ZnO and NiNC (ZnO-NiNC) by calcination in N2. Although these two particles have many similar physicochemical properties, the ZnO-NiNC dimer particles show greatly enhanced activity for degradation of rhodamine B (RhB) under UV-vis illumination, where its reaction constant is 43 times of its own in the dark and 13 times higher than that of ZnO@NiNC under the same condition. A group of experiments reveal a synergistic mechanism for the ZnO-NiNC catalyst under illumination, in which the photoelectrons directionally migrate toward the exposed ZnO/NiNC interface and react with potassium peroxymonosulfate to produce more-reactive hydroxyl and persulfate radicals to accelerate the AOP reaction.
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Affiliation(s)
- Fei Pang
- Shanghai Key Laboratory of Green Chemistry and Chemical Processes. School of Chemistry and Molecular Engineering , East China Normal University , Shanghai 200062 , China
| | - Dengpeng Lan
- Shanghai Key Laboratory of Green Chemistry and Chemical Processes. School of Chemistry and Molecular Engineering , East China Normal University , Shanghai 200062 , China
| | - Jianping Ge
- Shanghai Key Laboratory of Green Chemistry and Chemical Processes. School of Chemistry and Molecular Engineering , East China Normal University , Shanghai 200062 , China
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925
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Characterization of the gas effluent in the treatment of nitrogen containing pollutants in water by Fenton process. Sep Purif Technol 2019. [DOI: 10.1016/j.seppur.2019.03.073] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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926
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Microbiological and Physicochemical Characterization of Hospital Effluents before and after Treatment with Two Types of Sawdust. J CHEM-NY 2019. [DOI: 10.1155/2019/3275101] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022] Open
Abstract
Physicochemical and microbiological analyses of liquid hospital effluents have demonstrated that they are loaded with organic and inorganic pollutants then discharged into the sewerage networks without treatment. The aim of this study is to suggest an effective solution for their treatment. Column filtration is an adequate method to reduce the pollutant load which makes it possible to have a rate of abatement of 97% and 79% by filtering the pollutant material using sawdust of catia and red sawdust, respectively, with a filter bed height equal to 13 cm. Physicochemical parameters such as chemical oxygen demand, biological oxygen demand, nitrate, ammonia, phosphorus, electrical conductivity and the bacteriological parameters like fecal coliforms, Streptococci, and Staphylococci have been measured. The analysis of heavy metals displays compliance with the World Health Organization standards. The red sawdust and catia sawdust have been characterized by scanning electron microscopy and Fourier-transform infrared spectroscopy.
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927
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Rojas-Mantilla HD, Ayala-Durán SC, Pupo Nogueira RF. Parameters affecting LED photoreactor efficiency in a heterogeneous photo-Fenton process using iron mining residue as catalyst. JOURNAL OF ENVIRONMENTAL SCIENCE AND HEALTH. PART A, TOXIC/HAZARDOUS SUBSTANCES & ENVIRONMENTAL ENGINEERING 2019; 54:1277-1286. [PMID: 31318311 DOI: 10.1080/10934529.2019.1640579] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/08/2019] [Revised: 06/21/2019] [Accepted: 06/25/2019] [Indexed: 06/10/2023]
Abstract
In this article, a light-emitting diode (LED)-based photoreactor was designed and evaluated for degradation of the antibiotic sulfathiazole (STZ), using heterogeneous photo-Fenton process with an iron ore residue as catalyst. The effects of the type of magnetic stirrer bar, use of baffles, rotation speed, and type and intensity of irradiation source were evaluated. The results showed that the degradation of STZ was strongly influenced by rotation speed (1100 rpm) and that the use of an octagonal stirrer bar favoured high dispersion and greater contact of the catalyst with the reaction medium. Although the presence of baffles had little influence on STZ degradation, their use enabled good dispersion of the catalyst (due to axial flow) and eliminated the vortex formed at high stirring speeds. It was found that the iron mining residue could be activated by UV LEDs, visible light LEDs, and black light irradiation, with similar degradation efficiencies achieved. Using the LEDs, STZ concentrations below the detection limit were obtained after 40 min, with power consumption 38-fold (UV LEDs) and 22-fold (visible light LEDs) lower than required for black light irradiation. The results demonstrated the advantages of the use of LED devices as irradiation systems in heterogeneous photo-Fenton processes.
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Affiliation(s)
- Hernán Dario Rojas-Mantilla
- Department of Analytical Chemistry, Institute of Chemistry, São Paulo State University (UNESP) , Araraquara , Brazil
- National Institute for Alternative Technologies of Detection, Toxicological Evaluation and Removal of Micropollutants and Radioactives (INCT-DATREM) , Araraquara , Brazil
| | - Saidy Cristina Ayala-Durán
- Department of Analytical Chemistry, Institute of Chemistry, São Paulo State University (UNESP) , Araraquara , Brazil
- National Institute for Alternative Technologies of Detection, Toxicological Evaluation and Removal of Micropollutants and Radioactives (INCT-DATREM) , Araraquara , Brazil
| | - Raquel Fernandes Pupo Nogueira
- Department of Analytical Chemistry, Institute of Chemistry, São Paulo State University (UNESP) , Araraquara , Brazil
- National Institute for Alternative Technologies of Detection, Toxicological Evaluation and Removal of Micropollutants and Radioactives (INCT-DATREM) , Araraquara , Brazil
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928
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Wu D, Bai Y, Wang W, Xia H, Tan F, Zhang S, Su B, Wang X, Qiao X, Wong PK. Highly pure MgO 2 nanoparticles as robust solid oxidant for enhanced Fenton-like degradation of organic contaminants. JOURNAL OF HAZARDOUS MATERIALS 2019; 374:319-328. [PMID: 31022632 DOI: 10.1016/j.jhazmat.2019.04.058] [Citation(s) in RCA: 30] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/10/2019] [Revised: 04/15/2019] [Accepted: 04/16/2019] [Indexed: 06/09/2023]
Abstract
In typical Fenton/Fenton-like reactions, H2O2 was usually used as an oxidant to degrade organic contaminants. However, liquid H2O2 is unstable, easy to decompose and has high biological toxicity especially at high concentration. Herein, highly pure magnesium peroxide (MgO2) nanoparticles were first synthesized and used instead of H2O2 to degrade organic dyes. The structure and morphology of as-prepared products were confirmed by XRD, SEM, TEM and FTIR techniques. The active oxygen content of MgO2 nanoparticles reached up to 26.93 wt%, suggesting a high purity of the as-prepared sample. The degradation performance of MgO2 nanoparticles towards organic contaminants was systematically investigated in the terms of the molar ratio of Fe3+ to MgO2, the dosage of MgO2, initial solution pH and different organic dyes. The results indicated the as-prepared MgO2 exhibited excellent degradation ability to various types of organic dyes. 10 mg of MgO2 nanoparticles could almost completely degrade 200 mL of 20 mg/L methylene blue (MB) in 30 min with a TOC removal rate of 70.2%. The efficient degradation performance was ascribed to the generation of hydroxyl radicals in the MgO2/Fe3+ system. The pathways of MB degradation were also proposed based on the determination of the reaction intermediates.
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Affiliation(s)
- Doudou Wu
- State Key Laboratory of Material Processing and Die & Mould Technology, Huazhong University of Science and Technology, Wuhan 430074, Hubei, China
| | - Yun Bai
- State Key Laboratory of Material Processing and Die & Mould Technology, Huazhong University of Science and Technology, Wuhan 430074, Hubei, China
| | - Wei Wang
- State Key Laboratory of Material Processing and Die & Mould Technology, Huazhong University of Science and Technology, Wuhan 430074, Hubei, China.
| | - Hongliang Xia
- State Key Laboratory of Material Processing and Die & Mould Technology, Huazhong University of Science and Technology, Wuhan 430074, Hubei, China
| | - Fatang Tan
- State Key Laboratory of Material Processing and Die & Mould Technology, Huazhong University of Science and Technology, Wuhan 430074, Hubei, China
| | - Shenghua Zhang
- College of Resources and Environmental Science, South-Central University for Nationalities, Wuhan, 430074, Hubei, China
| | - Bin Su
- State Key Laboratory of Material Processing and Die & Mould Technology, Huazhong University of Science and Technology, Wuhan 430074, Hubei, China
| | - Xinyun Wang
- State Key Laboratory of Material Processing and Die & Mould Technology, Huazhong University of Science and Technology, Wuhan 430074, Hubei, China
| | - Xueliang Qiao
- State Key Laboratory of Material Processing and Die & Mould Technology, Huazhong University of Science and Technology, Wuhan 430074, Hubei, China
| | - Po Keung Wong
- School of Life Sciences, The Chinese University of Hong Kong, Shatin, NT, Hong Kong SAR, China
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929
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Zhang X, Zhang J, Huang X, Wu QP, Yan CH, Lu JF. Efficient peroxymonosulfate activation by Zn/Fe metal-organic framework-derived ZnO/Fe 3 O 4 @carbon spheres for the degradation of Acid Orange 7. WATER ENVIRONMENT RESEARCH : A RESEARCH PUBLICATION OF THE WATER ENVIRONMENT FEDERATION 2019; 91:634-641. [PMID: 30793819 DOI: 10.1002/wer.1090] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/20/2018] [Revised: 02/09/2019] [Accepted: 02/14/2019] [Indexed: 06/09/2023]
Abstract
ZnO/Fe3 O4 @carbon spheres, which synthesized via a calcination process used Zn/Fe metal-organic frameworks (Zn/Fe-MOFs) as a precursor, were studied for the activation of peroxymonosulfate (PMS) for the degradation of Acid Orange 7 (AO7). The ZnO/Fe3 O4 @carbon spheres exhibited relatively high catalytic degradation properties for AO7 in an aqueous solution. The AO7 degradation reached 93.6% in 15 min under the conditions: 0.20 g/L ZnO/Fe3 O4 @carbon spheres, 1.25 mmol/L PMS, 0.03 mmol/L AO7, and initial pH of 4. Findings revealed that higher ZnO/Fe3 O4 @carbon spheres dose and PMS concentration, lower initial AO7 concentration, and acidic pH favored the AO7 degradation to a certain extent. The mechanisms for the activation of PMS by ZnO/Fe3 O4 @carbon spheres were proposed based on the results of radical identification tests and structure characterization. Both radical and nonradical pathways contribute to the AO7 degradation in this system. PRACTITIONER POINTS: PMS + ZnO/Fe3 O4 @carbon spheres system can effectively catalyze PMS to decompose AO7. Both radical and nonradical pathways contribute to the degradation of AO7 in this system. The acidic condition was favorable for the activation of PMS.
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Affiliation(s)
- Xiao Zhang
- College of Architecture & Environment, Sichuan University, Chengdu, China
| | - Jing Zhang
- College of Architecture & Environment, Sichuan University, Chengdu, China
| | - Xue Huang
- College of Architecture & Environment, Sichuan University, Chengdu, China
| | - Qing Ping Wu
- College of Architecture & Environment, Sichuan University, Chengdu, China
| | - Chun Hui Yan
- College of Architecture & Environment, Sichuan University, Chengdu, China
| | - Jin Feng Lu
- College of Environmental Science and Engineering, Nankai University, Tianjin, China
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930
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Zhou H, Wu S, Zhou Y, Yang Y, Zhang J, Luo L, Duan X, Wang S, Wang L, Tsang DCW. Insights into the oxidation of organic contaminants by iron nanoparticles encapsulated within boron and nitrogen co-doped carbon nanoshell: Catalyzed Fenton-like reaction at natural pH. ENVIRONMENT INTERNATIONAL 2019; 128:77-88. [PMID: 31029982 DOI: 10.1016/j.envint.2019.04.006] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/01/2019] [Revised: 03/17/2019] [Accepted: 04/02/2019] [Indexed: 06/09/2023]
Abstract
Iron nanoparticles encapsulated within boron and nitrogen co-doped carbon nanoshell (B/N-C@Fe) were synthesized through a novel and green pyrolysis process using melamine, boric acid, and ferric nitrate as the precursors. The surface morphology, structure, and composition of the B/N-C@Fe materials were thoroughly investigated. The materials were employed as novel catalysts for the activation of potassium monopersulfate triple salt (PMS) for the degradation of levofloxacin (LFX). Linear sweep voltammograms and quenching experiments were used to identify the mechanisms of PMS activation and LFX oxidation by B/N-C@Fe, where SO4- as well as HO were proved to be the main radicals for the reaction processes. This study also discussed how the fluvic acid and inorganic anions in the aqueous solutions affected the degradation of LFX and use this method to simulate the degradation in the real wastewater. The synthesized materials showed a high efficiency (85.5% of LFX was degraded), outstanding stability, and excellent reusability (77.7% of LFX was degraded in the 5th run) in the Fenton-like reaction of LFX. In view of these advantages, B/N-C@Fe have great potentials as novel strategic materials for environmental catalysis.
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Affiliation(s)
- Hao Zhou
- College of Resources and Environment, Hunan Agricultural University, Changsha 410128, China; State Key Laboratory of Organic Geochemistry, Guangzhou Institute of Geochemistry, Chinese Academy of Sciences, Guangzhou 510640, China; University of Chinese Academy of Sciences, Beijing 100049, China
| | - Shikang Wu
- College of Resources and Environment, Hunan Agricultural University, Changsha 410128, China
| | - Yaoyu Zhou
- College of Resources and Environment, Hunan Agricultural University, Changsha 410128, China; Department of Civil and Environmental Engineering, The Hong Kong Polytechnic University, Hung Hom, Kowloon, Hong Kong, China.
| | - Yuan Yang
- College of Resources and Environment, Hunan Agricultural University, Changsha 410128, China
| | - Jiachao Zhang
- College of Resources and Environment, Hunan Agricultural University, Changsha 410128, China
| | - Lin Luo
- College of Resources and Environment, Hunan Agricultural University, Changsha 410128, China
| | - Xiaoguang Duan
- School of Chemical Engineering, The University of Adelaide, Adelaide, SA 5005, Australia
| | - Shaobin Wang
- School of Chemical Engineering, The University of Adelaide, Adelaide, SA 5005, Australia
| | - Lei Wang
- Department of Materials Science and Engineering, The University of Sheffield, Sir Robert Hadfield Building, Mappin St, Sheffield S1 3JD, United Kingdom; Department of Civil and Environmental Engineering, The Hong Kong Polytechnic University, Hung Hom, Kowloon, Hong Kong, China
| | - Daniel C W Tsang
- Department of Civil and Environmental Engineering, The Hong Kong Polytechnic University, Hung Hom, Kowloon, Hong Kong, China.
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931
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Gao Y, Duan Y, Fan W, Guo T, Huo M, Yang W, Zhu S, An W. Intensifying ozonation treatment of municipal secondary effluent using a combination of microbubbles and ultraviolet irradiation. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2019; 26:21915-21924. [PMID: 31140087 DOI: 10.1007/s11356-019-05554-8] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/22/2019] [Accepted: 05/22/2019] [Indexed: 06/09/2023]
Abstract
Ozonation treatment of municipal secondary effluent is complicated by the low solubility of ozone and inefficient production of hydroxyl free radicals from ozone decomposition. To resolve these problems, this study investigated methods for intensifying ozonation treatment, using a combination of microbubbles and ultraviolet (UV) irradiation (UV/MBO). The high efficiency of the method was illustrated by treating river water containing refractory components derived from secondary effluent in a wastewater treatment plant. The results showed that the ozone mass transfer coefficient in a microbubble system was an order of magnitude compared with a conventional macrobubble system at the initial stage. The amount of ·OH generated during the treatment was quantified using a fluorescent probe analysis. The amount of ·OH in the UV/MBO system was almost 2-6 times more than the amount found with conventional ozonation using macrobubbles (CO), CO with UV irradiation (UV/CO), and microbubble ozonation (MBO) units. The UV/MBO system achieved chemical oxygen demand (COD), UV254, and UV400 removal performance rates of up to 37.50%, 81.15%, and 94.74% respectively. These levels were 2-36% higher than those in other systems. The coupling UV/MBO treatment significantly reduced all five categories of substances according to EEM spectra and fluorescence regional integration. The distribution of fractions with different molecular weights (MW) was altered and the UV254 of MW (< 500 Da) increased by 15.8%. The biodegradability of the water was significantly improved, as indicated by the TOC/UV254. This is ascribed to the enhanced degradation of refractory organics in the water. The combination of the UV/microbubble technique with ozonation could provide an efficient approach for advanced wastewater treatment. Graphical abstract.
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Affiliation(s)
- Yue Gao
- School of Environment, Northeast Normal University, Changchun, 130117, China
| | - Yutong Duan
- School of Environment, Northeast Normal University, Changchun, 130117, China
| | - Wei Fan
- School of Environment, Northeast Normal University, Changchun, 130117, China.
| | - Tiantian Guo
- School of Environment, Northeast Normal University, Changchun, 130117, China
| | - Mingxin Huo
- School of Environment, Northeast Normal University, Changchun, 130117, China
| | - Wu Yang
- School of Environment, Northeast Normal University, Changchun, 130117, China
| | - Suiyi Zhu
- School of Environment, Northeast Normal University, Changchun, 130117, China
| | - Wengang An
- School of Environment, Northeast Normal University, Changchun, 130117, China
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932
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Serna-Galvis EA, Silva-Agredo J, Botero-Coy AM, Moncayo-Lasso A, Hernández F, Torres-Palma RA. Effective elimination of fifteen relevant pharmaceuticals in hospital wastewater from Colombia by combination of a biological system with a sonochemical process. THE SCIENCE OF THE TOTAL ENVIRONMENT 2019; 670:623-632. [PMID: 30909040 DOI: 10.1016/j.scitotenv.2019.03.153] [Citation(s) in RCA: 47] [Impact Index Per Article: 9.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/21/2018] [Revised: 03/05/2019] [Accepted: 03/10/2019] [Indexed: 05/09/2023]
Abstract
This work presents the treatment of selected emerging concern pharmaceuticals in real hospital wastewater (HWW) from Tumaco-Colombia by combination of a biological system with a sonochemical process. Fifteen compounds, commonly present in HWW, were considered: acetaminophen, diclofenac, carbamazepine, venlafaxine, loratadine, ciprofloxacin, norfloxacin, valsartan, irbesartan, sulfamethoxazole, trimethoprim, clarithromycin, azithromycin, erythromycin and clindamycin. Initially, HWW was characterized in terms of global parameters and the pharmaceuticals content. HWW contained a moderate amount of organic matter (i.e., total organic carbon: 131.56 mg L-1 (C)) mainly associated to biodegradable components. However, the most of pharmaceuticals were found at levels upper than their predicted no effect concentration (PNEC). Then, a conventional biological treatment was applied to the HWW. After 36 h, such process mainly removed biodegradable substances, but had a limited action on the pharmaceuticals. The resultant biotreated water was submitted to the sonochemical process (375 kHz and 88 W L-1, 1.5 h), which due to its chemical (i.e., radical attacks) and physical (i.e., suspended solids disaggregation) effects induced a considerable pharmaceuticals degradation (pondered removal: 58.82%), demonstrating the complementarity of the proposed combination. Afterwards, Fe2+ (5 ppm) and UVC light (4 W) were added to the sonochemical system (generating sono-photo-Fenton process), which significantly increased up to 82.86% the pondered pharmaceuticals removal. Subsequently, to understand fundamental aspects of the pharmaceuticals degradations, a model compound (norfloxacin) in distilled water was treated by sonochemical system, sono-photo-Fenton process and their sub-systems (i.e., sono-Fenton and UVC alone). This allowed proving the hydroxyl radical action in sonochemical treatment, plus the contribution of Fenton reaction and direct photodegradation in the pharmaceuticals removal by sono-photo-Fenton. Finally, it was found that 91.13% of the initial pharmaceuticals load in HWW was removed by the biological/sono-photo-Fenton combination. The high pollutants abatement evidenced that this combination is a powerful alternative for removing pharmaceuticals from complex-matrix waters, such as raw HWW.
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Affiliation(s)
- Efraím A Serna-Galvis
- Grupo de Investigación en Remediación Ambiental y Biocatálisis (GIRAB), Instituto de Química, Facultad de Ciencias Exactas y Naturales, Universidad de Antioquia UdeA, Calle 70 No. 52-21, Medellín, Colombia.
| | - Javier Silva-Agredo
- Grupo de Investigación en Remediación Ambiental y Biocatálisis (GIRAB), Instituto de Química, Facultad de Ciencias Exactas y Naturales, Universidad de Antioquia UdeA, Calle 70 No. 52-21, Medellín, Colombia
| | - Ana María Botero-Coy
- Research Institute for Pesticides and Water (IUPA), University Jaume I (UJI), Castellón, Spain
| | - Alejandro Moncayo-Lasso
- Grupo de Investigación en Ciencias Biológicas y Químicas, Facultad de Ciencias, Universidad Antonio Nariño (UAN), Bogotá, D.C., Colombia
| | - Félix Hernández
- Research Institute for Pesticides and Water (IUPA), University Jaume I (UJI), Castellón, Spain
| | - Ricardo A Torres-Palma
- Grupo de Investigación en Remediación Ambiental y Biocatálisis (GIRAB), Instituto de Química, Facultad de Ciencias Exactas y Naturales, Universidad de Antioquia UdeA, Calle 70 No. 52-21, Medellín, Colombia.
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933
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Removal of chemical oxygen demand from agro effluent by ZnO photocatalysis and photo-Fenton. SN APPLIED SCIENCES 2019. [DOI: 10.1007/s42452-019-0782-z] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022] Open
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934
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Wei K, Cao X, Gu W, Liang P, Huang X, Zhang X. Ni-Induced C-Al 2O 3-Framework ( NiCAF) Supported Core-Multishell Catalysts for Efficient Catalytic Ozonation: A Structure-to-Performance Study. ENVIRONMENTAL SCIENCE & TECHNOLOGY 2019; 53:6917-6926. [PMID: 31050416 DOI: 10.1021/acs.est.8b07132] [Citation(s) in RCA: 55] [Impact Index Per Article: 11.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/09/2023]
Abstract
During catalytic ozonation, Al2O3-supported catalysts usually have stable structures but relatively low surface activity, while carbon-supported catalysts are opposite. To encourage their synergisms, we designed a Ni-induced C-Al2O3-framework (NiCAF) and reinforced it with a Cu-Co bimetal to create an efficient catalyst (CuCo/NiCAF) with a core-multishell structure. The partial graphitization of carbon adjacent to Ni crystals formed a strong out-shell on the catalyst surface. The rate constant for total organic carbon removal of CuCo/NiCAF (0.172 ± 0.018 min-1) was 67% and 310% higher than that of Al2O3-supported catalysts and Al2O3 alone, respectively. The metals on CuCo/NiCAF contributed to surface-mediated reactions during catalytic ozonation, while the embedded carbon enhanced reactions within the solid-liquid boundary layer and in the bulk solution. Moreover, carbon embedment provided a 76% increase in ·OH-production efficiency and an 86% increase in organic-adsorption capacity compared to Al2O3-supported catalysts. During the long-term treatment of coal-gasification wastewater (∼5 m3 day-1), the pilot-scale demonstration of CuCo/NiCAF-catalyzed ozonation revealed a 120% increase in ozone-utilization efficiency (ΔCOD/ΔO3 = 2.12) compared to that of pure ozonation (0.96). These findings highlight catalysts supported on NiCAF as a facile and efficient approach to achieve both high catalytic activity and excellent structural stability, demonstrating that they are highly viable for practical applications.
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Affiliation(s)
- Kajia Wei
- State Key Joint Laboratory of Environment Simulation and Pollution Control, School of Environment , Tsinghua University , Beijing 100084 , P. R. China
| | - Xiaoxin Cao
- State Key Joint Laboratory of Environment Simulation and Pollution Control, School of Environment , Tsinghua University , Beijing 100084 , P. R. China
| | - Wancong Gu
- State Key Joint Laboratory of Environment Simulation and Pollution Control, School of Environment , Tsinghua University , Beijing 100084 , P. R. China
| | - Peng Liang
- State Key Joint Laboratory of Environment Simulation and Pollution Control, School of Environment , Tsinghua University , Beijing 100084 , P. R. China
| | - Xia Huang
- State Key Joint Laboratory of Environment Simulation and Pollution Control, School of Environment , Tsinghua University , Beijing 100084 , P. R. China
| | - Xiaoyuan Zhang
- State Key Joint Laboratory of Environment Simulation and Pollution Control, School of Environment , Tsinghua University , Beijing 100084 , P. R. China
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935
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Feizi R, Ahmad M, Jorfi S, Ghanbari F. Sunset yellow degradation by ultrasound/peroxymonosulfate/CuFe2O4: Influential factors and degradation processes. KOREAN J CHEM ENG 2019. [DOI: 10.1007/s11814-019-0268-0] [Citation(s) in RCA: 17] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
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936
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Zhu K, Ren X, Sun X, Zhu L, Sun Z. Effect of Supporting Electrolyte on the Surface Corrosion and Anodic Oxidation Performance of Graphite Electrode. Electrocatalysis (N Y) 2019. [DOI: 10.1007/s12678-019-00541-6] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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937
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Yu J, Tian X, Liu M, Jia Z, Fang H, Liu Y, Yu C. Catalytic activity of Cu xMn xFe 3-2xO 4/multi-walled carbon nanotubes (0 ≤ x ≤ 0.1) nanocomposites for p-nitrophenol degradation in catalyst/H 2O 2 system. WATER SCIENCE AND TECHNOLOGY : A JOURNAL OF THE INTERNATIONAL ASSOCIATION ON WATER POLLUTION RESEARCH 2019; 79:2345-2356. [PMID: 31411589 DOI: 10.2166/wst.2019.236] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Abstract
Heterogeneous Fenton oxidation has become a very important wastewater-treatment method and its catalyst is crucial for good treatment effect. In order to improve the catalytic properties, the Cu and Mn elements were doped for CuxMnxFe3-2xO4/multi-walled carbon nanotubes (CuxMnxFe3-2xO4/MWCNTs) nanocomposites (0 ≤ x ≤ 0.1) by co-precipitation method. The structure, morphology and surface properties of the nanocomposites were characterized by X-ray powder diffractometer (XRD), N2-physisorption analysis, transmission electron microscope (TEM), and X-ray photoelectron spectroscopy (XPS). The CuxMnxFe3-2xO4/MWCNTs nanocomposites were used as heterogeneous Fenton catalysts for p-nitrophenol (p-NP) degradation. The catalytic performances of the Cu and/or Mn doped nanocomposites have remarkable improvement compared with Fe3O4/MWCNTs nanocomposite, especially for both Cu and Mn doped catalyst. For CuxMnxFe3-2xO4/MWCNTs nanocomposites, the catalytic performance increases with increasing x value and reaches a maximum at 0.075 of x value. At optimal condition, the p-NP conversion rate reaches 96.4% in 10 min for Cu0.075Mn0.075Fe2.85O4/MWCNTs nanocomposite. However, the mentioned rate for Fe3O4/MWCNTs catalyst is only 14.5%. The chemical oxygen demand (COD) removal rates in 120 min for Cu0.075Mn0.075Fe2.85O4/MWCNTs and Fe3O4/MWCNTs catalysts are 82.7% and 67.3%, respectively. Furthermore, the p-NP conversion and COD removal rates of Cu0.075Mn0.075Fe2.85O4/MWCNTs nanocomposite still keep at 94.4% and 70.3% after five-time reuse, respectively. This catalyst shows good reusability for p-NP degradation and is very easy to recover from the treated water.
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Affiliation(s)
- Jiye Yu
- Key Laboratory of Carbon Fiber and Functional Polymers, Ministry of Education, Beijing University of Chemical Technology, Beijing 100029, China E-mail:
| | - Xiaojun Tian
- School of Life Science and Technology, Beijing University of Chemical Technology, Beijing 100029, China
| | - Mingwang Liu
- Key Laboratory of Carbon Fiber and Functional Polymers, Ministry of Education, Beijing University of Chemical Technology, Beijing 100029, China E-mail:
| | - Zhenzhen Jia
- Key Laboratory of Carbon Fiber and Functional Polymers, Ministry of Education, Beijing University of Chemical Technology, Beijing 100029, China E-mail:
| | - Hongqin Fang
- Key Laboratory of Carbon Fiber and Functional Polymers, Ministry of Education, Beijing University of Chemical Technology, Beijing 100029, China E-mail:
| | - Yunfang Liu
- Key Laboratory of Carbon Fiber and Functional Polymers, Ministry of Education, Beijing University of Chemical Technology, Beijing 100029, China E-mail:
| | - Changyuan Yu
- School of Life Science and Technology, Beijing University of Chemical Technology, Beijing 100029, China
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938
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Sharma VK, Yu X, McDonald TJ, Jinadatha C, Dionysiou DD, Feng M. Elimination of antibiotic resistance genes and control of horizontal transfer risk by UV-based treatment of drinking water: A mini review. FRONTIERS OF ENVIRONMENTAL SCIENCE & ENGINEERING 2019; 13:10.1007/s11783-019-1122-7. [PMID: 32133212 PMCID: PMC7055709 DOI: 10.1007/s11783-019-1122-7] [Citation(s) in RCA: 31] [Impact Index Per Article: 6.2] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/21/2019] [Revised: 04/26/2019] [Accepted: 04/30/2019] [Indexed: 05/19/2023]
Abstract
Antibiotic-resistant bacteria (ARB) and antibiotic resistance genes (ARGs) have been recognized as one of the biggest public health issues of the 21st century. Both ARB and ARGs have been determined in water after treatment with conventional disinfectants. Ultraviolet (UV) technology has been seen growth in application to disinfect the water. However, UV method alone is not adequate to degrade ARGs in water. Researchers are investigating the combination of UV with other oxidants (chlorine, hydrogen peroxide (H2O2), peroxymonosulfate (PMS), and photocatalysts) to harness the high reactivity of produced reactive species (Cl·, ClO·, Cl2·-, ·OH, and SO4·-) in such processes with constituents of cell (e.g., deoxyribonucleic acid (DNA) and its components) in order to increase the degradation efficiency of ARGs. This paper briefly reviews the current status of different UV-based treatments (UV/chlorination, UV/H2O2, UV/PMS, and UV-photocatalysis) to degrade ARGs and to control horizontal gene transfer (HGT) in water. The review also provides discussion on the mechanism of degradation of ARGs and application of q-PCR and gel electrophoresis to obtain insights of the fate of ARGs during UV-based treatment processes.
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Affiliation(s)
- Virender K. Sharma
- Department of Environmental and Occupational Health, School of Public Health, Texas A&M University, College Station, TX 77843, USA
| | - Xin Yu
- Institute of Urban Environment, Chinese Academy of Sciences, Xiamen 361021, China
| | - Thomas J. McDonald
- Department of Environmental and Occupational Health, School of Public Health, Texas A&M University, College Station, TX 77843, USA
| | - Chetan Jinadatha
- Central Texas Veterans Health Care System, Temple, TX 76504, USA
- College of Medicine, Texas A&M Health Science Center, Bryan, TX 77807, USA
| | - Dionysios D. Dionysiou
- Environmental Engineering and Science Program, Department of Chemical and Environmental Engineering (DChEE), 705 Engineering Research Center, University of Cincinnati, Cincinnati, OH 45221, USA
| | - Mingbao Feng
- Department of Environmental and Occupational Health, School of Public Health, Texas A&M University, College Station, TX 77843, USA
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939
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Abstract
Application of solar photocatalysis for water treatment is intensively studied. In this work, we investigated TiO2 modified with platinum (Pt/TiO2) and palladium (Pd/TiO2) using sulfamethoxazole (SMX) as the model contaminant. We considered the following parameters: (i) level of TiO2 modification with Pt/Pd, (ii) initial concentration of photocatalysts, (iii) geographic location where processes were conducted, and (iv) natural water matrix. The catalysts characterized by SEM, EDX, DRS, and XRD techniques showed successful deposition of Pd and Pt atoms on TiO2 surface that enabled light absorption in the visible (Vis) range, and therefore caused efficient SMX removal in all tested conditions. A comparison of the rate constants of SMX degradation in various conditions revealed that modification with Pd gave better results than modification with Pt, which was explained by the better optical properties of Pd/TiO2. The removal of SMX was higher with Pd/TiO2 than with Pt/TiO2, independent of the modification level. In the experiments with the same modification level, similar rate constants were achieved when four times the lower concentration of Pd/TiO2 was used as compared with Pt/TiO2. Formation of four SMX transformation products was confirmed, in which both amine groups are involved in photocatalytic oxidation. No toxic effect of post-reaction solutions towards Lepidium sativum was observed.
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940
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Jiménez S, Andreozzi M, Micó MM, Álvarez MG, Contreras S. Produced water treatment by advanced oxidation processes. THE SCIENCE OF THE TOTAL ENVIRONMENT 2019; 666:12-21. [PMID: 30784818 DOI: 10.1016/j.scitotenv.2019.02.128] [Citation(s) in RCA: 30] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/16/2018] [Revised: 02/06/2019] [Accepted: 02/08/2019] [Indexed: 06/09/2023]
Abstract
Different Advanced Oxidation Processes (AOPs) such as photocatalysis, Fenton-based processes and ozonation were studied to include one of these technologies within an integrated solution for produced water (PW) polishing. Synthetic PW was prepared adding toluene, xylene, naphthalene, phenol, acetic and malonic acids to a seawater matrix. Despite that in all AOPs studied in this work BTEX and naphthalene were removed, the efficiency (in terms of TOC removal) of each treatment varied largely. Among these techniques, photocatalysis was found to be the less effective for the treatment of PW, as TOC removals lower than 20% were obtained for the best scenario after 4 h treatment. In the contrary, best results were obtained by ozonation combined with H2O2, where all the organic components were removed, including a high percentage of acetic acid, which was not abated by the rest of the AOPs studied. The optimum conditions for ozonation were 4 g h-1 O3 and 1500 mg L-1 H2O2 at pH 10, where after 2 h a 74% of TOC removal was achieved and the acetic acid elimination was 78%. This condition enabled that ozonation process accounted for the lowest electric energy consumption per order of target compound destruction regarding total organic carbon (TOC).
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Affiliation(s)
- Silvia Jiménez
- Departament d' Enginyeria Química, Universitat Rovira i Virgili, Av Països Catalans 26, 43007 Tarragona, Spain; R&D Department, Acciona Agua S.A.U, Parc de Negocis Mas Blau II, Avda. de les Garrigues, 22, 08820 El Prat de Llobregat, Barcelona, Spain
| | - Mario Andreozzi
- Department of Chemical Engineering, Materials and Industrial Production (DICMAPI), University of Naples Federico II, p.le V. Tecchio 80, 80125 Napoli, Italy
| | - María M Micó
- R&D Department, Acciona Agua S.A.U, Parc de Negocis Mas Blau II, Avda. de les Garrigues, 22, 08820 El Prat de Llobregat, Barcelona, Spain
| | - Mayra G Álvarez
- Departament d' Enginyeria Química, Universitat Rovira i Virgili, Av Països Catalans 26, 43007 Tarragona, Spain
| | - Sandra Contreras
- Departament d' Enginyeria Química, Universitat Rovira i Virgili, Av Països Catalans 26, 43007 Tarragona, Spain.
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941
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Origin, Fate and Control of Pharmaceuticals in the Urban Water Cycle: A Case Study. WATER 2019. [DOI: 10.3390/w11051034] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Abstract
The aquatic environment and drinking water production are under increasing pressure from the presence of pharmaceuticals and their transformation products in surface waters. Demographic developments and climate change result in increasing environmental concentrations, deeming abatement measures necessary. Here, we report on an extensive case study around the river Meuse and its tributaries in the south of The Netherlands. For the first time, concentrations in the tributaries were measured and their apportionment to a drinking water intake downstream were calculated and measured. Large variations, depending on the river discharge were observed. At low discharge, total concentrations up to 40 μg/L were detected, with individual pharmaceuticals exceeding thresholds of toxicological concern and ecological water-quality standards. Several abatement options, like reorganization of wastewater treatment plants (WWTPs), and additional treatment of wastewater or drinking water were evaluated. Abatement at all WWTPs would result in a good chemical and ecological status in the rivers as required by the European Union (EU) Water Framework Directive. Considering long implementation periods and high investment costs, we recommend prioritizing additional treatment at the WWTPs with a high contribution to the environment. If drinking water quality is at risk, temporary treatment solutions in drinking water production can be considered. Pilot plant research proved that ultraviolet (UV) oxidation is a suitable solution for drinking water and wastewater treatment, the latter preferably in combination with effluent organic matter removal. In this way >95% of removal of pharmaceuticals and their transformation products can be achieved, both in drinking water and in wastewater. Application of UV/H2O2, preceded by humic acid removal by ion exchange, will cost about €0.23/m3 treated water.
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942
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Zeng B, Zhang P, Zheng M, Xiao N, Han J, Wang C, Wang Z, Zhao Z. Detection and identification of the oxidizing species generated from the physiologically important Fenton-like reaction of iron(II)-citrate with hydrogen peroxide. Arch Biochem Biophys 2019; 668:39-45. [PMID: 31100219 DOI: 10.1016/j.abb.2019.05.006] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/23/2019] [Revised: 04/18/2019] [Accepted: 05/06/2019] [Indexed: 12/18/2022]
Abstract
The Fenton-like reaction of iron(II)-citrate with hydrogen peroxide is physiologically important because it is associated with the oxidative stress and pathological processes induced by the redox-active iron pool in vivo. However, the oxidizing species generated from this reaction at neutral pH has not been convincingly identified because two extremely unstable and hard-to-differentiate species, the hydroxyl radical (•OH) and iron(IV) (ferryl) species, can be produced. Identifying this species is essential for understanding the reaction mechanism. Although there were few data that reported the detection of •OH from this reaction by using the EPR and fluorescence techniques, most of these data were obtained without the necessary assessment with a •OH scavenger. Furthermore, these two techniques may not be able to differentiate the •OH and iron(IV) species. Thus, these reported data cannot lead to a convincing conclusion that the •OH, not the iron(IV) species, was generated. Therefore, in the study reported herein, we carried out systematic investigations first by using the EPR and fluorescence techniques combined with a •OH scavenger to detect the oxidizing species generated from this Fenton-like reaction. Then we utilized NMR spectroscopy and for the first time obtained convincing evidence to demonstrate that this oxidizing species is the •OH rather than iron(IV) species. We also determined the second-order rate constant of the reaction, 3.6 × 103 M-1s-1 (pH7.0, 25 °C), by using the stopped-flow spectrophotometry. On the basis of these findings, a scheme is proposed for the mechanism of this physiologically important Fenton-like reaction.
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Affiliation(s)
- Binglin Zeng
- School of Pharmaceutical Sciences, Capital Medical University, Beijing, 100069, China; Beijing Area Major Laboratory of Peptide and Small Molecular Drugs; Engineering Research Center of Endogenous Prophylactic of Ministry of Education of China, Beijing, China
| | - Peifeng Zhang
- School of Pharmaceutical Sciences, Capital Medical University, Beijing, 100069, China; Beijing Area Major Laboratory of Peptide and Small Molecular Drugs; Engineering Research Center of Endogenous Prophylactic of Ministry of Education of China, Beijing, China
| | - Meiqing Zheng
- Core Facility Center, Capital Medical University, Beijing, 100069, China
| | - Nao Xiao
- School of Pharmaceutical Sciences, Capital Medical University, Beijing, 100069, China; Beijing Area Major Laboratory of Peptide and Small Molecular Drugs; Engineering Research Center of Endogenous Prophylactic of Ministry of Education of China, Beijing, China
| | - Jialun Han
- School of Pharmaceutical Sciences, Capital Medical University, Beijing, 100069, China; Beijing Area Major Laboratory of Peptide and Small Molecular Drugs; Engineering Research Center of Endogenous Prophylactic of Ministry of Education of China, Beijing, China
| | - Can Wang
- School of Pharmaceutical Sciences, Capital Medical University, Beijing, 100069, China; Beijing Area Major Laboratory of Peptide and Small Molecular Drugs; Engineering Research Center of Endogenous Prophylactic of Ministry of Education of China, Beijing, China
| | - Zheng Wang
- School of Pharmaceutical Sciences, Capital Medical University, Beijing, 100069, China; Beijing Area Major Laboratory of Peptide and Small Molecular Drugs; Engineering Research Center of Endogenous Prophylactic of Ministry of Education of China, Beijing, China
| | - Zhongwei Zhao
- School of Pharmaceutical Sciences, Capital Medical University, Beijing, 100069, China; Beijing Area Major Laboratory of Peptide and Small Molecular Drugs; Engineering Research Center of Endogenous Prophylactic of Ministry of Education of China, Beijing, China; Present address: College of Life Science and Technology, Beijing University of Chemical Technology, Beijing, 100029, China.
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943
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Interaction patterns in fluidized-bed Fenton process for the degradation of recalcitrant pollutants: theoretical and experimental insights. CHEMICAL PAPERS 2019. [DOI: 10.1007/s11696-019-00813-x] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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944
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Wu X, Liu J, Zhu JJ. Sono-Fenton hybrid process on the inactivation of Microcystis aeruginosa: Extracellular and intracellular oxidation. ULTRASONICS SONOCHEMISTRY 2019; 53:68-76. [PMID: 30600211 DOI: 10.1016/j.ultsonch.2018.12.034] [Citation(s) in RCA: 22] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/08/2018] [Revised: 12/18/2018] [Accepted: 12/23/2018] [Indexed: 05/26/2023]
Abstract
For the first time, the inactivation of Microcystis aeruginosa using sono-Fenton process at low frequency high intensity (20 kHz, 0.42 W/mL) and high frequency low intensity (800 kHz, 0.07 W/mL) was investigated, respectively. 20 kHz sono-Fenton treatment successfully reduced cyanobacterial cell number from 4.19 × 106 cells/mL to 0.45 × 106 cells/mL within 5 min treatment. Alternatively, efficient performance of 800 kHz sono-Fenton process was observed to decrease Microcystis cell number to 2.33 × 106 cells/mL after 5 min inactivation, with lower energy cost. It was found that powerful 20 kHz sonication induced pore formation on the cell wall, leading to extracellular damage, while 800 kHz irradiation with low intensity triggered intracellular uptake of chemicals, suggesting endocytosis effects. Furthermore, sono-Fenton Processes were found to be affected by the concentrations of Fenton's reagent, and pre-sonication time. Although solo Fenton treatment released microcystins in water, the degradation of microcystin-LR were achieved using 20 and 800 kHz sono-Fenton processes, respectively. The results of this work showed that severe extracellular oxidation is the vital inactivation mechanism of 20 kHz sono-Fenton process, while the internal oxidation caused by intracellularly delivered Fenton reagents is suggested to be the main cause of 800 kHz sono-Fenton inactivation, leading to much lower energy cost. This work provides alternative methods to control harmful cyanobacteria in water towards effective treatment.
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Affiliation(s)
- Xiaoge Wu
- Environment Science and Engineering College, Yangzhou University, Yangzhou, Jiangsu 225009, China; State Key Laboratory of Analytical Chemistry for Life Science, School of Chemistry and Chemical Engineering, Nanjing University, Nanjing, Jiangsu 210023, China; Jiangsu Collaborative Innovation Center for Solid Organic Waste Resource Utilization, Nanjing 210095, China
| | - Junli Liu
- Environment Science and Engineering College, Yangzhou University, Yangzhou, Jiangsu 225009, China
| | - Jun-Jie Zhu
- State Key Laboratory of Analytical Chemistry for Life Science, School of Chemistry and Chemical Engineering, Nanjing University, Nanjing, Jiangsu 210023, China.
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945
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Wang C, Zhao H, Dai Z, Li W, Liu H. The effect of inorganic salt in wastewater on the viscosity of coal water slurry. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2019; 26:14171-14177. [PMID: 30859441 DOI: 10.1007/s11356-019-04776-0] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/11/2018] [Accepted: 03/04/2019] [Indexed: 06/09/2023]
Abstract
The preparation of coal water slurry (CWS) using wastewater, which contains inorganic and organic components, is one method of wastewater utilization. In this study, the effect of inorganic salts on the viscosity of CWS was examined. The results show that monovalent salts (NaCl, KCl) decreased the viscosity of CWS. The viscosity of CWS was not affected by bivalent salts (CaCl2, MgCl2). However, CWS combined with trivalent salt (AlCl3) sharply increased the viscosity. The zeta potential of CWS with inorganic salts increased which can enhance the electric repulsion and beneficial to reduce the viscosity. The content of free water in CWS with trivalent salt decreased, and the freedom of the free water in CWS with trivalent salt decreased which were all bad to the viscosity and the adsorption of the dispersant on the particles. Compared with the surface polarity of the particles without inorganic salts, the surface polarity of the particles with divalent salts was similar to those without inorganic salts. Under the comprehensive influence, divalent salt has little effect on the viscosity of CWS.
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Affiliation(s)
- Chunyu Wang
- Key Laboratory of Coal Gasification and Energy Chemical Engineering of Ministry of Education, East China University of Science and Technology, P.O. Box 272, No. 130 Meilong Road, Shanghai, 200237, People's Republic of China
| | - Hui Zhao
- Key Laboratory of Coal Gasification and Energy Chemical Engineering of Ministry of Education, East China University of Science and Technology, P.O. Box 272, No. 130 Meilong Road, Shanghai, 200237, People's Republic of China
| | - Zhenghua Dai
- Key Laboratory of Coal Gasification and Energy Chemical Engineering of Ministry of Education, East China University of Science and Technology, P.O. Box 272, No. 130 Meilong Road, Shanghai, 200237, People's Republic of China
| | - Weifeng Li
- Key Laboratory of Coal Gasification and Energy Chemical Engineering of Ministry of Education, East China University of Science and Technology, P.O. Box 272, No. 130 Meilong Road, Shanghai, 200237, People's Republic of China
| | - Haifeng Liu
- Key Laboratory of Coal Gasification and Energy Chemical Engineering of Ministry of Education, East China University of Science and Technology, P.O. Box 272, No. 130 Meilong Road, Shanghai, 200237, People's Republic of China.
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946
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Preparation, and structural of new NiS-SiO2 and Cr2S3-TiO2 nano-catalyst: Photocatalytic and antimicrobial studies. JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY B-BIOLOGY 2019; 194:128-134. [DOI: 10.1016/j.jphotobiol.2019.03.016] [Citation(s) in RCA: 36] [Impact Index Per Article: 7.2] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/26/2019] [Revised: 03/18/2019] [Accepted: 03/25/2019] [Indexed: 11/22/2022]
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947
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Umar M, Roddick F, Fan L. Moving from the traditional paradigm of pathogen inactivation to controlling antibiotic resistance in water - Role of ultraviolet irradiation. THE SCIENCE OF THE TOTAL ENVIRONMENT 2019; 662:923-939. [PMID: 30795480 DOI: 10.1016/j.scitotenv.2019.01.289] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/29/2018] [Revised: 01/21/2019] [Accepted: 01/22/2019] [Indexed: 06/09/2023]
Abstract
Ultraviolet (UV) irradiation has proven an effective tool for inactivating microorganisms in water. There is, however, a need to look at disinfection from a different perspective because microbial inactivation alone may not be sufficient to ensure the microbiological safety of the treated water since pathogenic genes may still be present, even after disinfection. Antibiotic resistance genes (ARGs) are of a particular concern since they enable microorganisms to become resistant to antibiotics. UV irradiation has been widely used for disinfection and more recently for destroying ARGs. While UV lamps remain the principal technology to achieve this objective, UV light emitting diodes (UV-LEDs) are novel sources of UV irradiation and have increasingly been reported in lab-scale investigations as a potential alternative. This review discusses the current state of the applications of UV technology for controlling antibiotic resistance during water and wastewater treatment. Since UV-LEDs possess several attractive advantages over conventional UV lamps, the impact of UV-LED characteristics (single vs combined wavelengths, and operational parameters such as periodic or pulsed and continuous irradiation, pulse repetition frequencies, duty cycle), type of organism, and fluence response, are critically reviewed with a view to highlighting the research needs for addressing future disinfection challenges. The energy efficiency of the reported UV processes is also evaluated with a focus on relating the findings to disinfection efficacy. The greater experience with UV lamps could be useful for investigating UV-LEDs for similar applications (i.e., antibiotic resistance control), and hence identification of future research directions.
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Affiliation(s)
- Muhammad Umar
- Norwegian Institute for Water Research (NIVA), Gaustadallèen 21, NO-0349 Oslo, Norway.
| | - Felicity Roddick
- Department of Chemical and Environmental Engineering, School of Engineering, RMIT University, Melbourne 3001, Australia
| | - Linhua Fan
- Department of Chemical and Environmental Engineering, School of Engineering, RMIT University, Melbourne 3001, Australia
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948
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Collivignarelli MC, Abbà A, Carnevale Miino M, Damiani S. Treatments for color removal from wastewater: State of the art. JOURNAL OF ENVIRONMENTAL MANAGEMENT 2019; 236:727-745. [PMID: 30772730 DOI: 10.1016/j.jenvman.2018.11.094] [Citation(s) in RCA: 119] [Impact Index Per Article: 23.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/19/2018] [Revised: 10/22/2018] [Accepted: 11/21/2018] [Indexed: 05/07/2023]
Abstract
It is evident from many recent papers that release of colored wastewater into the environment is source of pollution and this is a problem that particularly affect textile, dyeing and food industries. The review: (i) presents an analysis of various mechanisms involved in the different processes for color removal; (ii) describes conveniences and disadvantages that may exist in adopting one type of treatment in spite of another; (iii) reports the results of approximately 180 experimental tests. Both examples of treatments already widely applied to the real scale and still in the experimental phase are reported. This work focuses on different types of chemical/physical, chemical, electrochemical and biological processes applied in the field of color removal from industrial wastewater. Common chemical/physical treatments such as coagulation/flocculation, adsorption and membrane filtration as well as chemical-type processes are discussed, both those that exploit the traditional oxidizing chemical agents such as Ozone, H2O2 and reactive based on chlorine and those based on the principle of advanced chemical oxidation. In particular, both Hydroxyl radical based Advanced Oxidation Processes (AOPs) and Sulfate radical based AOPs are reported. The most commonly used Electrochemical processes for the removal of color are also presented as well as biological treatments. Based on more than 200 papers, this review provides important information on the use, effectiveness, advantages and downsides of the various treatments aimed at removing the color from the wastewater with a look at the technologies still under development.
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Affiliation(s)
| | - Alessandro Abbà
- Department of Civil, Environmental, Architectural Engineering and Mathematics, University of Brescia, via Branze 43, 25123, Brescia, Italy.
| | - Marco Carnevale Miino
- Department of Civil Engineering and Architecture, University of Pavia, via Ferrata 1, 27100, Pavia, Italy.
| | - Silvestro Damiani
- Department of Civil Engineering and Architecture, University of Pavia, via Ferrata 1, 27100, Pavia, Italy.
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949
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Gong J, Chen A, Wang Y. Insight into Different Mechanisms for Oxidation of Liquid and Gaseous Pollutants by Bi−NaBiO
3
with or without Visible Light Illumination. ChemCatChem 2019. [DOI: 10.1002/cctc.201900158] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Affiliation(s)
- Jianyu Gong
- School of Environmental Science and EngineeringHuazhong University of Science and Technology Wuhan 430074 China
| | - Ayan Chen
- School of Environmental Science and EngineeringHuazhong University of Science and Technology Wuhan 430074 China
| | - Yunyang Wang
- School of Environmental Science and EngineeringHuazhong University of Science and Technology Wuhan 430074 China
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950
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Bampos G, Frontistis Z. Sonocatalytic degradation of butylparaben in aqueous phase over Pd/C nanoparticles. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2019; 26:11905-11919. [PMID: 30820921 DOI: 10.1007/s11356-019-04604-5] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/03/2018] [Accepted: 02/18/2019] [Indexed: 06/09/2023]
Abstract
In the present work, the sonocatalytic degradation of butylparaben was investigated using Pd immobilized on carbon black as the sonocatalyst. The presence of 25 mg/L 10Pd/C significantly increased the removal rate of butylparaben and the observed kinetic constant increased from 0.0126 to 0.071 min-1, while the synergy index between sonolysis and adsorption was 70.7%. The BP degradation followed pseudo-first-order kinetics with the apparent kinetic constant decreased from 0.071 to 0.030 min-1 when the initial concentration of butylparaben increased from 0.5 to 2 mg/L. The process was being favored slightly under alkaline conditions. The presence of organic matter (20 mg/L humic acid) reduced the apparent kinetic constant more than two times. The addition of chlorides up to 250 mg/L did not significantly reduce the rate of reaction, while the presence of 250 mg/L bicarbonates reduced the observed kinetic constant from 0.071 to 0.0472 min-1. The prepared catalyst retains the efficiency after five subsequent experiments since the apparent kinetic constant was only slightly decreased from 0.071 to 0.059 min-1.
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Affiliation(s)
- Georgios Bampos
- Department of Chemical Engineering, University of Patras, Caratheodory 1, University Campus, GR-26504, Patras, Greece
| | - Zacharias Frontistis
- Department of Environmental Engineering, University of Western Macedonia, GR-50100, Kozani, Greece.
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