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Shi Y, Li JJ, Wang Q, Jia Q, Yan F, Luo ZH, Zhou YN. Computer-aided estimation of kinetic rate constant for degradation of volatile organic compounds by hydroxyl radical: An improved model using quantum chemical and norm descriptors. Chem Eng Sci 2022. [DOI: 10.1016/j.ces.2021.117244] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
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2
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Wang Z, Liu W, Chen H, Zhang Z, Yang Z, Yang Q. Photoreductive degradation of CCl 4 by UV-Na 2SO 3: influence of various factors, mechanism and application. ENVIRONMENTAL TECHNOLOGY 2021; 42:217-226. [PMID: 31145050 DOI: 10.1080/09593330.2019.1625957] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/15/2019] [Accepted: 05/25/2019] [Indexed: 06/09/2023]
Abstract
Due to the strong electron-withdrawing nature of Cl atom in CCl4, CCl4 could not readily be degraded by oxidation process. In the present study, aqueous electron (eaq -), a powerful reducing agent generated in UV-Na2SO3 system, was applied to reductively degradation of CCl4. The effects of several crucial factors (e.g. Na2SO3 concentration, solution pH, inorganic ions and NOM) on CCl4 degradation as well as degradation mechanism and pathway were systematically investigated. Results indicated that CCl4 was efficiently degraded in UV-Na2SO3 system and the process could be well described by pseudo-first order kinetic model. The degradation rate increased with the elevated Na2SO3 concentration (0-10 mmol/L) and solution pH (6.0-8.0), while remained approximately constant in alkaline conditions (pH = 8.0, 9.0 and 10.0). Nevertheless, O2, inorganic ions and NOM exerted a negative effect on CCl4 degradation and the removal efficiency of CCl4 in groundwater was only 31.7%. Mechanistic study implied that degradation of CCl4 was primarily induced by eaq -. CCl4 (10 mg/L) was almost completely dechlorinated within 60 min and the predominant intermediate products were CHCl3, C2Cl4 and C2HCl3. CHCl3 and CH2Cl2 were also rapidly degraded in the UV-Na2SO3 system.
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Affiliation(s)
- Zhen Wang
- School of Water Resources and Environment, China University of Geosciences (Beijing), Beijing, People's Republic of China
- Beijing Key Laboratory of Water Resources & Environmental Engineering, China University of Geosciences (Beijing), Beijing, P.R. People's Republic of China
| | - Wei Liu
- School of Water Resources and Environment, China University of Geosciences (Beijing), Beijing, People's Republic of China
- Beijing Key Laboratory of Water Resources & Environmental Engineering, China University of Geosciences (Beijing), Beijing, P.R. People's Republic of China
| | - Hai Chen
- School of Water Resources and Environment, China University of Geosciences (Beijing), Beijing, People's Republic of China
- Beijing Key Laboratory of Water Resources & Environmental Engineering, China University of Geosciences (Beijing), Beijing, P.R. People's Republic of China
| | - Zhonglei Zhang
- School of Water Resources and Environment, China University of Geosciences (Beijing), Beijing, People's Republic of China
- Beijing Key Laboratory of Water Resources & Environmental Engineering, China University of Geosciences (Beijing), Beijing, P.R. People's Republic of China
| | - Zhilin Yang
- School of Water Resources and Environment, China University of Geosciences (Beijing), Beijing, People's Republic of China
- Beijing Key Laboratory of Water Resources & Environmental Engineering, China University of Geosciences (Beijing), Beijing, P.R. People's Republic of China
| | - Qi Yang
- School of Water Resources and Environment, China University of Geosciences (Beijing), Beijing, People's Republic of China
- Beijing Key Laboratory of Water Resources & Environmental Engineering, China University of Geosciences (Beijing), Beijing, P.R. People's Republic of China
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3
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Tao C, Jia Q, Han B, Ma Z. Tunable selectivity of radical generation over TiO2 for photocatalysis. Chem Eng Sci 2020. [DOI: 10.1016/j.ces.2019.115438] [Citation(s) in RCA: 23] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
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4
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Tashiro K, Tanimura T, Yamazaki S. Photocatalytic degradation of gaseous trichloroethylene on porous titanium dioxide pellets modified with copper(II) under visible light irradiation. J Photochem Photobiol A Chem 2019. [DOI: 10.1016/j.jphotochem.2019.03.037] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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Wang W, Wu Y. Sequential coupling of bio-augmented permeable reactive barriers for remediation of 1,1,1-trichloroethane contaminated groundwater. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2019; 26:12042-12054. [PMID: 30827025 DOI: 10.1007/s11356-019-04676-3] [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: 04/23/2018] [Accepted: 02/22/2019] [Indexed: 06/09/2023]
Abstract
Sequential coupling of high-density luffa sponge (HDLS) immobilized microorganism and permeable reactive barriers (IM Bio-PRBs) was superior to intimate coupling of free microorganism and permeable reactive barriers (FM Bio-PRBs) for remediation of 1,1,1-trichloroethane contaminated groundwater. IM Bio-PRBs had much better performance to removal 1,1,1-trichloroethane (1,1,1-TCA) and prevent the transport of 1,1,1-TCA and inorganic ions (NO3-, PO43-, and SO42-). The majority of them were prevented and accumulated in upgradient of IM Bio-PRBs. 1,1,1-TCA and inorganic ions in there contributed to the much faster growth of microorganism in upgradient aquifer. Therefore, the removal of 1,1,1-TCA and consumption of inorganic ions in upgradient of Bio-PRBs played a constructive role in reducing the processing load of following zero-valent iron (ZVI) PRBs and the negative effect of free microorganism cells (biological clogging) and inorganic ions (chemical clogging) on Bio-PRB permeability. In addition, IM Bio-PRBs were more conducive to accelerate the removal of 1,1,1-TCA in long-term remediation and 1,1,1-TCA residual concentration significantly lower than the safety standard of 0.2 mg L-1. The change of terminal by-products of 1,1,1-TCA contaminated groundwater in Bio-PRBs showed that 1,1,1-TCA could be effectively de-chlorinated and mineralized in Bio-PRBs. The reductant H2S (prolong the service life of ZVI-PRBs) was much more produced and utilized in IM Bio-PRBs. Taken together, sequentially coupled IM Bio-PRBs had a better overall performance, and its service life could be prolonged. It was a different design and idea to update conventional PRB remediation technology and theory.
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Affiliation(s)
- Wenbing Wang
- School of Environmental Science and Engineering, Shanghai Jiao Tong University, Shanghai, 200240, People's Republic of China
| | - Yanqing Wu
- School of Environmental Science and Engineering, Shanghai Jiao Tong University, Shanghai, 200240, People's Republic of China.
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Chen B, Zhu C, Fei J, Jiang Y, Yin C, Su W, He X, Li Y, Chen Q, Ren Q, Chen Y. Reaction kinetics of phenols and p-nitrophenols in flowing aerated aqueous solutions generated by a discharge plasma jet. JOURNAL OF HAZARDOUS MATERIALS 2019; 363:55-63. [PMID: 30300778 DOI: 10.1016/j.jhazmat.2018.09.051] [Citation(s) in RCA: 22] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/28/2018] [Revised: 09/19/2018] [Accepted: 09/20/2018] [Indexed: 06/08/2023]
Abstract
In this paper, we propose a method for removing phenols and p-nitrophenols (PNPs) from flowing aqueous solutions generated by atmospheric pressure plasma jets (APPJs). For analyzing the removal characteristics, multiple techniques were used, including flow speed analysis of the aerated solution, optical emission spectroscopy (OES), and liquid chromatography. In addition, the reaction kinetics of diffusion and activation control processes were evaluated using aerated fluid speed variation and the corresponding activation energy. From these results, the relative intensities of hydroxyl radicals produced by an APPJ in water were found to be stronger than those in air and to decrease with increasing flow speed. Furthermore, the reaction kinetics were found to be diffusion-controlled when the solution flow speed was low and activation-controlled under high solution flow speed. It was also found that the degradation efficiency was enhanced with increasing flow speed, which increased the discharge voltage and temperature of the solution and changed the initial pH value when TiO2/UV catalysis was used. From the complex relationship between the reactive species, fluid diffusion, and discharge parameters in wastewater described herein, it is anticipated that these findings will facilitate new approaches to both the design and optimization of discharge reactors intended for wastewater treatment.
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Affiliation(s)
- Bingyan Chen
- Department of Mathematics and Physics, Hohai University, Changzhou 213022, PR China; Jiangsu Key Laboratory of Power Transmission and Distribution Equipment Technology, Changzhou 213022, PR China; College of Mechanical and Electrical Engineering, Hohai University, Changzhou 213022, PR China.
| | - Changping Zhu
- Jiangsu Key Laboratory of Power Transmission and Distribution Equipment Technology, Changzhou 213022, PR China.
| | - Juntao Fei
- Jiangsu Key Laboratory of Power Transmission and Distribution Equipment Technology, Changzhou 213022, PR China.
| | - Yongfeng Jiang
- College of Mechanical and Electrical Engineering, Hohai University, Changzhou 213022, PR China
| | - Cheng Yin
- Jiangsu Key Laboratory of Power Transmission and Distribution Equipment Technology, Changzhou 213022, PR China
| | - Wei Su
- Department of Mathematics and Physics, Hohai University, Changzhou 213022, PR China
| | - Xiang He
- Department of Mathematics and Physics, Hohai University, Changzhou 213022, PR China
| | - Yi Li
- College of Environment, Hohai University, Nanjing 210098, PR China.
| | - Qiang Chen
- Fujian Provincial Key Laboratory of Plasma and Magnetic Resonance, Xiamen University, Xiamen 361005, PR China
| | - Qinggong Ren
- School of Pertrochemical Engineering, Changzhou University, Changzhou 213164, PR China
| | - Yuwei Chen
- College of Mechanical and Electrical Engineering, Hohai University, Changzhou 213022, PR China
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7
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Titanium dioxide surface modified with both palladium and fluoride as an efficient photocatalyst for the degradation of urea. Sep Purif Technol 2019. [DOI: 10.1016/j.seppur.2018.07.058] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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8
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Wang W, Wu Y. Effects of biological clogging on 1,1,1-TCA and its intermediates distribution and fate in heterogeneous saturated bio-augmented permeable reactive barriers. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2018; 25:28628-28641. [PMID: 30094670 DOI: 10.1007/s11356-018-2908-z] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/18/2018] [Accepted: 08/03/2018] [Indexed: 06/08/2023]
Abstract
Biological clogging in porous media was an important concern in the design of bio-augmented permeable reactive barriers (Bio-PRBs) that were used to remediate groundwater with dense non-aqueous phase liquids (DNAPLs). Here, we used laboratory sandbox experiments to develop and calibrate reactive transport models (C1 and C2) simulating 1,1,1-trichloroethane (1,1,1-TCA) change in heterogeneous saturated porous media. The routine (1,1,1-TCA chain kinetic reactions) and subroutine (the relationship between hydraulic conductivity (K) and time (t)) were included in the model computer code. The simulation results suggested that the model C1 had the applicability for simulating contaminant transport and fate in bio-augmented flow field. By using the model C1 which was suitable for constant K condition, the performance of different types of Bio-PRBs was evaluated, and the regularity of contaminants chain kinetic reactions in different heterogeneous saturated porous media was obtained. The results demonstrated that Bio-PRBs in immobilized microorganism (IM) protocol were more superior to Bio-PRBs in free microorganism (FM) protocol. In addition, by using the model C2 (updated model C1) which was suitable for decreasing K condition, the different and optimized regularity of contaminants transport and transformation was obtained. The results showed that microbial growth which further decreased K was beneficial to preventing the transport of contaminants and accelerating the transformation of contaminants. However, the negative effects of biological clogging on hydraulic conductivity and relative hydraulic conductivity ratio in FM Bio-PRBs were significantly stronger than that in IM Bio-PRBs. Deploying IM Bio-PRBs for groundwater remediation would be much more efficient and meet the design criteria. The research work had guiding significance to engineering and provided consultation for designing and optimizing Bio-PRBs system. To make the design and optimization of Bio-PRBs system convenient, it was very essential to choose the suitable mathematical model (C1 or C2).
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Affiliation(s)
- Wenbing Wang
- School of Environmental Science and Engineering, Shanghai Jiao Tong University, Shanghai, 200240, People's Republic of China
| | - Yanqing Wu
- School of Environmental Science and Engineering, Shanghai Jiao Tong University, Shanghai, 200240, People's Republic of China.
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Wang D, Shuai K, Xu Q, Liu X, Li Y, Liu Y, Wang Q, Li X, Zeng G, Yang Q. Enhanced short-chain fatty acids production from waste activated sludge by combining calcium peroxide with free ammonia pretreatment. BIORESOURCE TECHNOLOGY 2018; 262:114-123. [PMID: 29702420 DOI: 10.1016/j.biortech.2018.04.081] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/21/2018] [Revised: 04/19/2018] [Accepted: 04/20/2018] [Indexed: 06/08/2023]
Abstract
This study reported a new low-cost and high-efficient combined method of CaO2 + free ammonia (FA) pretreatment for sludge anaerobic fermentation. Experimental results showed that the optimal short-chain fatty acids (SCFA) yield of 338.6 mg COD/g VSS was achieved when waste activated sludge (WAS) was pretreated with 0.05 g/g VSS of CaO2 + 180 mg/L of FA for 3 d, which was 2.5-fold of that from CaO2 pretreatment and 1.5-fold of that from FA pretreatment. The mechanism investigations exhibited that the CaO2 + FA could provided more biodegradable substrates, this combination accelerated the disintegration of sludge cells, which thereby providing more organics for subsequent SCFA production. It was also found that the combination of CaO2 and FA inhibited the specific activities of hydrolytic microbes, SCFA producers, and methanogens to some extents, but its inhibition to methanogens was much severer than that to the other two types of microbes.
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Affiliation(s)
- Dongbo Wang
- College of Environmental Science and Engineering, Hunan University, Changsha 410082, PR China; Key Laboratory of Environmental Biology and Pollution Control (Hunan University), Ministry of Education, Changsha 410082, PR China.
| | - Kun Shuai
- College of Environmental Science and Engineering, Hunan University, Changsha 410082, PR China; Key Laboratory of Environmental Biology and Pollution Control (Hunan University), Ministry of Education, Changsha 410082, PR China
| | - Qiuxiang Xu
- College of Environmental Science and Engineering, Hunan University, Changsha 410082, PR China; Key Laboratory of Environmental Biology and Pollution Control (Hunan University), Ministry of Education, Changsha 410082, PR China
| | - Xuran Liu
- College of Environmental Science and Engineering, Hunan University, Changsha 410082, PR China; Key Laboratory of Environmental Biology and Pollution Control (Hunan University), Ministry of Education, Changsha 410082, PR China
| | - Yifu Li
- College of Environmental Science and Engineering, Hunan University, Changsha 410082, PR China; Key Laboratory of Environmental Biology and Pollution Control (Hunan University), Ministry of Education, Changsha 410082, PR China
| | - Yiwen Liu
- Centre for Technology in Water and Wastewater, School of Civil and Environmental Engineering, University of Technology Sydney, Sydney, NSW 2007, Australia
| | - Qilin Wang
- Griffith School of Engineering & Centre for Clean Environment and Energy & Environmental Futures Research Institute, Griffith University, QLD, Australia
| | - Xiaoming Li
- College of Environmental Science and Engineering, Hunan University, Changsha 410082, PR China; Key Laboratory of Environmental Biology and Pollution Control (Hunan University), Ministry of Education, Changsha 410082, PR China
| | - Guangming Zeng
- College of Environmental Science and Engineering, Hunan University, Changsha 410082, PR China; Key Laboratory of Environmental Biology and Pollution Control (Hunan University), Ministry of Education, Changsha 410082, PR China
| | - Qi Yang
- College of Environmental Science and Engineering, Hunan University, Changsha 410082, PR China; Key Laboratory of Environmental Biology and Pollution Control (Hunan University), Ministry of Education, Changsha 410082, PR China
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10
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Dai C, Zhou Y, Peng H, Huang S, Qin P, Zhang J, Yang Y, Luo L, Zhang X. Current progress in remediation of chlorinated volatile organic compounds: A review. J IND ENG CHEM 2018. [DOI: 10.1016/j.jiec.2017.12.049] [Citation(s) in RCA: 75] [Impact Index Per Article: 12.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/24/2023]
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11
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H5PMo10V2O40 anchor by OH of the Titania nanotubes: Highly efficient heterogeneous catalyst for the direct hydroxylation of benzene. Chem Eng Sci 2018. [DOI: 10.1016/j.ces.2017.11.023] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
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12
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Enhanced photocatalytic reduction of chromium (VI) by Cu-doped TiO 2 under UV-A irradiation. Sep Purif Technol 2018. [DOI: 10.1016/j.seppur.2017.08.042] [Citation(s) in RCA: 44] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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13
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Combination of zero-valent iron and anaerobic microorganisms immobilized in luffa sponge for degrading 1,1,1-trichloroethane and the relevant microbial community analysis. Appl Microbiol Biotechnol 2016; 101:783-796. [DOI: 10.1007/s00253-016-7933-6] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/17/2016] [Revised: 09/07/2016] [Accepted: 10/12/2016] [Indexed: 11/25/2022]
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14
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Buchalska M, Kobielusz M, Matuszek A, Pacia M, Wojtyła S, Macyk W. On Oxygen Activation at Rutile- and Anatase-TiO2. ACS Catal 2015. [DOI: 10.1021/acscatal.5b01562] [Citation(s) in RCA: 123] [Impact Index Per Article: 13.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Marta Buchalska
- Faculty
of Chemistry, Jagiellonian University in Kraków, Ingardena
3, 30-060 Kraków, Poland
| | - Marcin Kobielusz
- Faculty
of Chemistry, Jagiellonian University in Kraków, Ingardena
3, 30-060 Kraków, Poland
| | - Anna Matuszek
- Faculty
of Chemistry, Jagiellonian University in Kraków, Ingardena
3, 30-060 Kraków, Poland
- Department
of Chemistry, The University of Auckland, Private Bag 92019, Auckland, New Zealand
| | - Michał Pacia
- Faculty
of Chemistry, Jagiellonian University in Kraków, Ingardena
3, 30-060 Kraków, Poland
| | - Szymon Wojtyła
- Faculty
of Chemistry, Jagiellonian University in Kraków, Ingardena
3, 30-060 Kraków, Poland
| | - Wojciech Macyk
- Faculty
of Chemistry, Jagiellonian University in Kraków, Ingardena
3, 30-060 Kraków, Poland
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