1
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Márquez V, Fereidooni M, Santos JS, Praserthdam S, Praserthdam P. Evaluation of the hydrogenation reaction on the electrocatalytic nitrobenzene degradation over (FeCoNiCuZn) xO y high entropy oxides (HEOs). CHEMOSPHERE 2023; 341:140130. [PMID: 37690554 DOI: 10.1016/j.chemosphere.2023.140130] [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: 05/25/2023] [Revised: 09/01/2023] [Accepted: 09/07/2023] [Indexed: 09/12/2023]
Abstract
Environmental pollution is one of the main challenges currently faced by mankind; especially industrial waste-waters treatment and remediation using energy-efficient methodologies. This research focused on the electrochemical degradation of the hazardous nitrobenzene (NB) in aqueous solutions, using novel high-entropy oxide (HEO) electrodes to elucidate the influence of the electrochemical reduction step on the degradation process. The effect of solution pH, dissolved oxygen concentration, anodic applied potential, and cell configurations on NB hydrogenation reaction were evaluated. A synergistic effect between the hydrogenation of nitrobenzene and the degradation was found to drastically enhance the conversion rates. The presence of dissolved oxygen promoted the oxidation reactions, reaching more than 90% nitrobenzene removal at 1.7 V and pH 14. The degradation of the organic by-products was attributed to the formation of the superoxide radical (O2*-) as the main oxidant species. A degradation mechanism was proposed based on the detected intermediates and the decoupling of electrochemical surface reactions observed by EIS at different solution pH.
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Affiliation(s)
- Victor Márquez
- Center of Excellence on Catalysis and Catalytic Reaction Engineering, Department of Chemical Engineering, Faculty of Engineering, Chulalongkorn University, Bangkok, 10330, Thailand
| | - Mohammad Fereidooni
- Center of Excellence on Catalysis and Catalytic Reaction Engineering, Department of Chemical Engineering, Faculty of Engineering, Chulalongkorn University, Bangkok, 10330, Thailand
| | - Janaina S Santos
- Center of Excellence on Catalysis and Catalytic Reaction Engineering, Department of Chemical Engineering, Faculty of Engineering, Chulalongkorn University, Bangkok, 10330, Thailand
| | - Supareak Praserthdam
- Center of Excellence on Catalysis and Catalytic Reaction Engineering, Department of Chemical Engineering, Faculty of Engineering, Chulalongkorn University, Bangkok, 10330, Thailand; High-Performance Computing Unit (CECC-HCU), Center of Excellence on Catalysis and Catalytic Reaction Engineering (CECC), Chulalongkorn University, Bangkok, 10330, Thailand
| | - Piyasan Praserthdam
- Center of Excellence on Catalysis and Catalytic Reaction Engineering, Department of Chemical Engineering, Faculty of Engineering, Chulalongkorn University, Bangkok, 10330, Thailand; CAT-REAC Industrial Center, Department of Chemical Engineering, Faculty of Engineering, Chulalongkorn University, Bangkok, 10330, Thailand.
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2
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Yu J, Zhu Z, Hu W, Deng Y, Feng C, Chen N. Research on the electrochemical treatment of nitrobenzene wastewater: The effects of process parameters and the mechanism of distinct degradation pathways. CHEMOSPHERE 2023; 338:139408. [PMID: 37419153 DOI: 10.1016/j.chemosphere.2023.139408] [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: 05/12/2023] [Revised: 06/28/2023] [Accepted: 07/01/2023] [Indexed: 07/09/2023]
Abstract
Nitrobenzene is a typical organic pollutant of petroleum pollutant, which is a synthetic chemical not found naturally in the environment. Nitrobenzene in environment can cause toxic liver disease and respiratory failure in humans. Electrochemical technology provides an effective and efficient method for degrading nitrobenzene. This study, the effects of process parameter (e.g., electrolyte solution type, electrolyte concentration, current density and pH) and distinct reaction pathways for electrochemical treatment of nitrobenzene were investigated. As a result, available chlorine dominates the electrochemical oxidation process compared with hydroxyl radical, thus the electrolyte of NaCl is more suitable for the degradation of nitrobenzene than that of Na2SO4. The concentration and the existence form of available chlorine were mainly controlled by electrolyte concentration, current density and pH, which directly affect the removal of nitrobenzene. Cyclic voltammetry and mass spectrometric analyses suggested that electrochemical degradation of nitrobenzene included two important ways. Firstly, single oxidation: nitrobenzene → other forms of aromatic compounds→ NO-x + organic acids + mineralization products. Secondly, coordination of reduction and oxidation: nitrobenzene → aniline→ N2 + NO-x + organic acid + mineralization products. The results of this study will encourage us to further understand the electrochemical degradation mechanism of nitrobenzene and develop the efficient processes for nitrobenzene treatment.
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Affiliation(s)
- Jie Yu
- School of Water Resources and Environment, MOE Key Laboratory of Groundwater Circulation and Environmental Evolution, China University of Geosciences (Beijing), Beijing, 100083, China
| | - Zipeng Zhu
- School of Water Resources and Environment, MOE Key Laboratory of Groundwater Circulation and Environmental Evolution, China University of Geosciences (Beijing), Beijing, 100083, China
| | - Weiwu Hu
- School of Water Resources and Environment, MOE Key Laboratory of Groundwater Circulation and Environmental Evolution, China University of Geosciences (Beijing), Beijing, 100083, China.
| | - Yang Deng
- Department of Environmental Engineering, College of Environmental Science and Engineering, Peking University, Beijing, 100871, China
| | - Chuanping Feng
- School of Water Resources and Environment, MOE Key Laboratory of Groundwater Circulation and Environmental Evolution, China University of Geosciences (Beijing), Beijing, 100083, China
| | - Nan Chen
- School of Water Resources and Environment, MOE Key Laboratory of Groundwater Circulation and Environmental Evolution, China University of Geosciences (Beijing), Beijing, 100083, China
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3
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Wang G, Qiu G, Wei J, Guo Z, Wang W, Liu X, Song Y. Activated carbon enhanced traditional activated sludge process for chemical explosion accident wastewater treatment. ENVIRONMENTAL RESEARCH 2023; 225:115595. [PMID: 36863655 DOI: 10.1016/j.envres.2023.115595] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/20/2022] [Revised: 02/14/2023] [Accepted: 02/27/2023] [Indexed: 06/18/2023]
Abstract
With the development of industries, explosion accidents occur frequently during production, transportation, usage and storage of hazard chemicals. It remained challenging to efficiently treat the resultant wastewater. As an enhancement of traditional process, the activated carbon-activated sludge (AC-AS) process has a promising potential in treating wastewater with high concentrations of toxic compounds, chemical oxygen demand (COD) and ammonia nitrogen (NH4+-N), etc. In this paper, activated carbon (AC), activated sludge (AS) and AC-AS were used to treat the wastewater produced from an explosion accident in the Xiangshui Chemical Industrial Park. The removal efficiency was assessed by the removal performances of COD, dissolved organic carbon (DOC), NH4+-N, aniline and nitrobenzene. Increased removal efficiency and shortened treatment time were achieved in the AC-AS system. To achieve the same COD, DOC and aniline removal (90%), the AC-AS system saved 30, 38 and 58 h compared with the AS system, respectively. The enhancement mechanism of AC on the AS was explored by metagenomic analysis and three-dimensional excitation-emission-matrix spectra (3DEEMs). More organics, especially aromatic substances were removed in the AC-AS system. These results showed that the addition of AC promoted the microbial activity in pollutant degradation. Bacteria, such as Pyrinomonas, Acidobacteria and Nitrospira and genes, such as hao, pmoA-amoA, pmoB-amoB and pmoC-amoC, were found in the AC-AS reactor, which might have played important roles in the degradation of pollutants. To sum up, AC might have enhanced the growth of aerobic bacteria which further improved the removal efficiency via the combined effects of adsorption and biodegradation. The successful treatment of Xiangshui accident wastewater using the AC-AS demonstrated the potential universal characteristics of the process for the treatment of wastewater with high concentration of organic matter and toxicity. This study is expected to provide reference and guidance for the treatment of similar accident wastewaters.
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Affiliation(s)
- Guanying Wang
- College of Water Sciences, Beijing Normal University, Beijing, 100875, China; State Key Laboratory of Environmental Criteria and Risk Assessment, Chinese Research Academy of Environmental Sciences, Beijing, 100012, China; Basin Research Center for Water Pollution Control, Chinese Research Academy of Environmental Sciences, Beijing, 100012, China
| | - Guanglei Qiu
- School of Environment and Energy, South China University of Technology, Guangzhou, 510006, China
| | - Jian Wei
- State Key Laboratory of Environmental Criteria and Risk Assessment, Chinese Research Academy of Environmental Sciences, Beijing, 100012, China
| | - Zhuang Guo
- State Key Laboratory of Environmental Criteria and Risk Assessment, Chinese Research Academy of Environmental Sciences, Beijing, 100012, China
| | - Weiye Wang
- State Key Laboratory of Environmental Criteria and Risk Assessment, Chinese Research Academy of Environmental Sciences, Beijing, 100012, China
| | - Xiaoling Liu
- State Key Laboratory of Environmental Criteria and Risk Assessment, Chinese Research Academy of Environmental Sciences, Beijing, 100012, China; Basin Research Center for Water Pollution Control, Chinese Research Academy of Environmental Sciences, Beijing, 100012, China.
| | - Yonghui Song
- College of Water Sciences, Beijing Normal University, Beijing, 100875, China; State Key Laboratory of Environmental Criteria and Risk Assessment, Chinese Research Academy of Environmental Sciences, Beijing, 100012, China.
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4
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Li N, Wang M, Qiao Z, Li C, Gu D, Zhu L, Yan C, Yuan D, Wu H, Wang B. Solar engineering of wastewater treatment for full mineralization of organic pollutants. ENVIRONMENTAL TECHNOLOGY 2023; 44:240-250. [PMID: 34383609 DOI: 10.1080/09593330.2021.1968508] [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: 06/23/2021] [Accepted: 08/07/2021] [Indexed: 06/13/2023]
Abstract
Full mineralization of organic pollutants is a tough task with existing technologies. Even if all conventional energies and extremes are exhausted, high-temperature wastewater treatment is not worth the loss from the perspective of energy. Solar engineering holds promise for the full mineralization of organic pollutants to tackle the global fossil energy shortage. Here, we report solar engineering for full mineralization and efficient solar utilization. The solar energies and spectrum were fully utilized to initiate the solar heat and solar electricity. Two energies were applied to trigger the thermochemical and electrochemical oxidation of the organic pollutants. Our study bridges the gap between the energy and environment towards efficient solar utilization and effective water treatment. As a proof-of-concept study, this demonstrates a solar engineering of full phenol mineralization in wastewater. A record phenol mineralization rate was achieved to reach an oxidation rate of 98% and COD of 93% under a constant current density of 50mA/cm2 at 150°C. UV and HPLC were used to detect the intermediate products during variable time intervals. The results showed that the intermediate products are composed of maleic acid, hydroquinone and p-benzoquinone. In the extreme high temperature (90°C), the solar oxidation time and pathway are greatly altered. The reaction rate constant at 150°C is about 11 times than that at 90°C. More solar heat significantly reduces the activated energy of the pollutant oxidation and lowers the potential of electrolysis.
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Affiliation(s)
- Nana Li
- College of Chemistry & Chemical Engineering, Northeast Petroleum University, Daqing, People's Republic of China
| | - Meng Wang
- College of Chemistry & Chemical Engineering, Northeast Petroleum University, Daqing, People's Republic of China
| | - Zhiqiang Qiao
- College of Chemistry & Chemical Engineering, Northeast Petroleum University, Daqing, People's Republic of China
| | - Chaoying Li
- College of Chemistry & Chemical Engineering, Northeast Petroleum University, Daqing, People's Republic of China
| | - Di Gu
- College of Chemistry & Chemical Engineering, Northeast Petroleum University, Daqing, People's Republic of China
| | - Lingyue Zhu
- College of Chemistry & Chemical Engineering, Northeast Petroleum University, Daqing, People's Republic of China
| | - Chao Yan
- College of Chemistry & Chemical Engineering, Northeast Petroleum University, Daqing, People's Republic of China
| | - Dandan Yuan
- College of Chemistry & Chemical Engineering, Northeast Petroleum University, Daqing, People's Republic of China
| | - Hongjun Wu
- College of Chemistry & Chemical Engineering, Northeast Petroleum University, Daqing, People's Republic of China
| | - Baohui Wang
- College of Chemistry & Chemical Engineering, Northeast Petroleum University, Daqing, People's Republic of China
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5
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Hu W, Wu F, Liu W. Facile synthesis of Z-scheme Bi2O3/Bi2WO6 composite for highly effective visible-light-driven photocatalytic degradation of nitrobenzene. Chem Phys 2022. [DOI: 10.1016/j.chemphys.2021.111377] [Citation(s) in RCA: 8] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
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6
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Li M, Peng X, Liu X, Wang H, Zhang S, Hu G. Single-atom niobium doped BCN nanotubes for highly sensitive electrochemical detection of nitrobenzene. RSC Adv 2021; 11:28988-28995. [PMID: 35478577 PMCID: PMC9038177 DOI: 10.1039/d1ra05517h] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/19/2021] [Accepted: 08/24/2021] [Indexed: 12/16/2022] Open
Abstract
Herein, single-atom niobium-doped boron–carbon–nitrogen nanotubes (SANb-BCN) were synthesized and utilized to fabricate an electrochemical sensor for the detection of nitrobenzene (NB), an environmental pollutant. SANb-BCN were characterized through scanning transmission electron microscopy, scanning electron microscopy, transmission electron microscopy, X-ray diffraction analysis, and Raman spectroscopy. The Nb-BNC material modified on a glassy carbon electrode (GCE) showed an excellent electrochemical response behavior toward NB. The SANb-BCN-modified GCE (SANb-BCN/GCE) gave rise to a prominent NB reduction peak at −0.6 V, which was positively shifted by 120 mV from the NB reduction peak of the bare GCE. Furthermore, the NB peak current (55.74 μA) obtained using SANb-BCN/GCE was nearly 42-fold higher than that using the bare GCE (1.32 μA), indicating that SANb-BCN/GCE is a highly sensitive electrochemical sensor for NB. An ultralow limit of detection (0.70 μM, S/N = 3) was also achieved. Furthermore, the SANb-BCN/GCE sensor was found to possess favorable anti-interference ability during NB detection; thus, the presence of various organic and inorganic coexisting species, including Mg2+, Cr6+, Cu2+, K+, Ca2+, NH4+, Cd2+, urea, 1-bromo-4-nitrobenzene, 3-hydroxybenzoic, terephthalic acid, 1-iodo-4-nitrobenzene, and toluene, minimally affected the NB detection signal. Notably, the SANb-BNC sensor material exhibited high sensitivity and specificity toward detection of NB in environmental samples. Thus, the use of the proposed sensor will serve as an effective alternative method for the identification and treatment of pollutants. Herein, single-atom niobium-doped boron–carbon–nitrogen nanotubes (SANb-BCN) were synthesized and utilized to fabricate an electrochemical sensor for the detection of nitrobenzene (NB), an environmental pollutant.![]()
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Affiliation(s)
- Meng Li
- College of Chemistry, Zhengzhou University Zhengzhou 450000 China
| | - Xianyun Peng
- Institute for New Energy Materials and Low-Carbon Technologies, Tianjin University of Technology Tianjin 300384 China
| | - Xijun Liu
- Institute for New Energy Materials and Low-Carbon Technologies, Tianjin University of Technology Tianjin 300384 China
| | - Huaisheng Wang
- School of Chemistry and Chemical Engineering, Liaocheng University Liaocheng 252000 China
| | - Shusheng Zhang
- College of Chemistry, Zhengzhou University Zhengzhou 450000 China
| | - Guangzhi Hu
- College of Chemistry, Zhengzhou University Zhengzhou 450000 China .,Institute for Ecological Research and Pollution Control of Plateau Lakes, School of Ecology and Environmental Science, Yunnan University Kunming 650504 China .,College of Biological, Chemical Sciences and Engineering, Jiaxing University Jiaxing Zhejiang 314001 China
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7
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Zheng Z, Zhang K, Toe CY, Amal R, Zhang X, McCarthy DT, Deletic A. Stormwater herbicides removal with a solar-driven advanced oxidation process: A feasibility investigation. WATER RESEARCH 2021; 190:116783. [PMID: 33387957 DOI: 10.1016/j.watres.2020.116783] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/27/2020] [Revised: 12/14/2020] [Accepted: 12/22/2020] [Indexed: 06/12/2023]
Abstract
The solar driven advanced oxidation process (AOP) has the potential to be developed as a passive stormwater post-treatment method. Despite its widespread studies in wastewater treatment, the applicability of the process for micropollutant removal in stormwater (which has very different chemical properties from wastewater) is still unknown. This paper investigated the feasibility of three different AOP processes for the degradation of two herbicides (diuron and atrazine) in pre-treated stormwater: (i) photoelectrochemical oxidation (PECO), (ii) electrochemical oxidation (ECO), and (iii) photocatalytic oxidation (PCO). The durability of different anode materials, the effects of catalyst loading, and solar photo- and thermal impacts under different applied voltages were studied. Boron-doped diamond (BDD) was found to be the most durable anode material compared to carbon fiber and titanium foil for long-term operation. Due to the very low electroconductivity of stormwater, a high voltage was required, causing severe oxidation of the carbon fiber material. PECO achieved the best degradation results compared to ECO and PCO, with over 90% degradation of both herbicides in 2 h under 5 V, following a first-order decay process (with a half-life value of 0.40 h for diuron and 0.58 h for atrazine). The voltage increase had a positive impact on the oxidation processes, with 5 V found to be the optimal applied voltage, while catalyst loading had a negligible effect. Interestingly, the solar thermal effect plays a dominant role in enhancing the performance of the PECO process, which indicates the potential of integrating a photovoltaic chamber with a PECO system to harness both the light and heat of solar energy for stormwater treatment.
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Affiliation(s)
- Zhaozhi Zheng
- School of Civil and Environmental Engineering, University of New South Wales, NSW 2052, Australia.
| | - Kefeng Zhang
- School of Civil and Environmental Engineering, University of New South Wales, NSW 2052, Australia
| | - Cui Ying Toe
- School of Chemical Engineering, University of New South Wales, NSW 2052, Australia
| | - Rose Amal
- School of Chemical Engineering, University of New South Wales, NSW 2052, Australia
| | - Xiwang Zhang
- Department of Chemical Engineering, Monash University, Clayton, VIC 3800, Australia
| | - David T McCarthy
- Environmental and Public Health Microbiology Laboratory, Department of Civil Engineering, Monash University, Clayton, VIC 3800, Australia
| | - Ana Deletic
- School of Civil and Environmental Engineering, University of New South Wales, NSW 2052, Australia
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8
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Wang H, Zhang L, Tian Y, Jia Y, Bo G, Luo L, Liu L, Shi G, Li F. Performance of nitrobenzene and its intermediate aniline removal by constructed wetlands coupled with the micro-electric field. CHEMOSPHERE 2021; 264:128456. [PMID: 33039917 DOI: 10.1016/j.chemosphere.2020.128456] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/24/2020] [Revised: 09/24/2020] [Accepted: 09/25/2020] [Indexed: 06/11/2023]
Abstract
The degradation of nitrobenzene and its intermediate aniline from wastewater by constructed wetlands coupled with the micro-electric field (CW-MEF) technology was studied. The results showed that the CW-MEF system had good degradation. With the increase of influent concentration of nitrobenzene, the removal rate of the anode was excellent which remained above 86%, but the degradation of CW-MEF for COD decreased. In different stages, the power generation capacity was different. In the second stage, the power generation voltage reached 430 V and the average power density was 85.07 MW m-3, while the maximum reached 87.47 MW m-3. Through high-throughput sequencing analysis, the A1 sludge layer contained 36% of thick-walled bacteria and 20% of bacteroides, the A2 contained about 20% of campylobacter green, and the A3 contained 10% of green campylobacter, pachyphyte and bacteroides.
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Affiliation(s)
- Hao Wang
- College of Civil and Architectural Engineering, North China University of Science and Technology, Tangshan, China.
| | - Lei Zhang
- School of Geology and Environment, Xi'an University of Science and Technology, Xi'an, China.
| | - Yang Tian
- College of Civil and Architectural Engineering, North China University of Science and Technology, Tangshan, China.
| | - Yang Jia
- School of Geology and Environment, Xi'an University of Science and Technology, Xi'an, China.
| | - Guozhu Bo
- College of Civil and Architectural Engineering, North China University of Science and Technology, Tangshan, China.
| | - Litao Luo
- College of Civil and Architectural Engineering, North China University of Science and Technology, Tangshan, China.
| | - Lin Liu
- College of Civil and Architectural Engineering, North China University of Science and Technology, Tangshan, China.
| | - Guoyuan Shi
- College of Civil and Architectural Engineering, North China University of Science and Technology, Tangshan, China.
| | - Fuping Li
- College of Mining Engineering, North China University of Science and Technology, Tangshan, China.
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9
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Gu D, Xia X, Jiang T, Jiang H, Wang B, Wang X. Solar Multifield-Driven Hybrid Chemical System for Purification of Organic Wastewater Focused on a Nano-Carbon/TiO 2/Ti Central Electrode. Ind Eng Chem Res 2020. [DOI: 10.1021/acs.iecr.0c02010] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
Affiliation(s)
- Di Gu
- Institute of New Energy Chemistry and Environmental Science, College of Chemistry and Chemical Engineering, Northeast Petroleum University, Xuefu Street No. 99, Daqing 163318, P. R. China
| | - Xue Xia
- Institute of New Energy Chemistry and Environmental Science, College of Chemistry and Chemical Engineering, Northeast Petroleum University, Xuefu Street No. 99, Daqing 163318, P. R. China
| | - Tingting Jiang
- Institute of New Energy Chemistry and Environmental Science, College of Chemistry and Chemical Engineering, Northeast Petroleum University, Xuefu Street No. 99, Daqing 163318, P. R. China
| | - Hong Jiang
- Institute of New Energy Chemistry and Environmental Science, College of Chemistry and Chemical Engineering, Northeast Petroleum University, Xuefu Street No. 99, Daqing 163318, P. R. China
| | - Baohui Wang
- Institute of New Energy Chemistry and Environmental Science, College of Chemistry and Chemical Engineering, Northeast Petroleum University, Xuefu Street No. 99, Daqing 163318, P. R. China
| | - Xirui Wang
- Department of Chemistry, George Washington University, Washington, District of Columbia 20052, United States
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10
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Zhang D, Wang B, Wang J, Wang H, Zhang S, Gu D. Isolated/interacting Au islands on TiO2 NTs for the switching photocatalytic/photoelectrocatalytic degradation of refractory organic pollutants in wastewater. RSC Adv 2019; 9:2784-2791. [PMID: 35692514 PMCID: PMC9119286 DOI: 10.1039/c8ra09160a] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/05/2018] [Accepted: 01/10/2019] [Indexed: 11/21/2022] Open
Abstract
A three-dimensional surface catalyst with isolated/interacting Au islands loaded on TiO2 nanotubes (Au/TiO2 NTs) was prepared for the switching photocatalytic/photoelectrocatalytic (PC/PEC) degradation of refractory organic wastewater, and shows prominent catalytic activity and favorable stability.
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Affiliation(s)
- Dan Zhang
- Institute of New Energy Chemistry and Environmental Science
- College of Chemistry and Chemical Engineering
- Northeast Petroleum University
- Daqing 163318
- PR China
| | - Baohui Wang
- Institute of New Energy Chemistry and Environmental Science
- College of Chemistry and Chemical Engineering
- Northeast Petroleum University
- Daqing 163318
- PR China
| | - Jiaqi Wang
- Provincial Key Laboratory of Oil & Gas Chemical Technology College of Chemistry and Chemical Engineering
- Northeast Petroleum University
- Daqing 163318
- PR China
| | - Hongming Wang
- Provincial Key Laboratory of Oil & Gas Chemical Technology College of Chemistry and Chemical Engineering
- Northeast Petroleum University
- Daqing 163318
- PR China
| | - Shixu Zhang
- Provincial Key Laboratory of Oil & Gas Chemical Technology College of Chemistry and Chemical Engineering
- Northeast Petroleum University
- Daqing 163318
- PR China
| | - Di Gu
- Provincial Key Laboratory of Oil & Gas Chemical Technology College of Chemistry and Chemical Engineering
- Northeast Petroleum University
- Daqing 163318
- PR China
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11
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Wang J, Yan C, Zhu L, Gu D, Zhang D, Wang H, Wang B. Solar binary chemical depolymerization of lignin for efficient production of small molecules and hydrogen. BIORESOURCE TECHNOLOGY 2019; 272:249-258. [PMID: 30352367 DOI: 10.1016/j.biortech.2018.10.032] [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: 08/27/2018] [Revised: 10/11/2018] [Accepted: 10/12/2018] [Indexed: 06/08/2023]
Abstract
In this paper, solar binary chemical depolymerization, that is Solar Thermal Electrochemical Process (STEP), was implemented for an effective breaking of lignin into small molecules and hydrogen. Compared with the conventional unitary chemical thermolysis, solar binary chemical depolymerization of lignin has high efficiencies of the liquefaction and gasification with the low coke, and accompanied by the abundant production of hydrogen. And the reaction temperature of the STEP process was greatly lowered by an intervention of the electrolysis. The results showed that the total conversion and liquefaction of the lignin yielded 87.22% and 57.72% under a constant current of 0.4 A at 340 °C. Further characterizations show that lignin has been successfully decomposed into small molecules with high added-value and hydrogen by a combination of the thermolysis and electrolysis. And the particle size of aggregates and the color degree in the lignin aqueous solution was obviously decreased after the STEP process.
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Affiliation(s)
- Jiaqi Wang
- Institute of New Energy Chemistry and Environmental Science, College of Chemistry & Chemical Engineering, Northeast Petroleum University, Daqing 163318, PR China
| | - Chao Yan
- Institute of New Energy Chemistry and Environmental Science, College of Chemistry & Chemical Engineering, Northeast Petroleum University, Daqing 163318, PR China
| | - Lingyue Zhu
- Institute of New Energy Chemistry and Environmental Science, College of Chemistry & Chemical Engineering, Northeast Petroleum University, Daqing 163318, PR China
| | - Di Gu
- Institute of New Energy Chemistry and Environmental Science, College of Chemistry & Chemical Engineering, Northeast Petroleum University, Daqing 163318, PR China
| | - Dan Zhang
- Institute of New Energy Chemistry and Environmental Science, College of Chemistry & Chemical Engineering, Northeast Petroleum University, Daqing 163318, PR China
| | - Hongming Wang
- Institute of New Energy Chemistry and Environmental Science, College of Chemistry & Chemical Engineering, Northeast Petroleum University, Daqing 163318, PR China
| | - Baohui Wang
- Institute of New Energy Chemistry and Environmental Science, College of Chemistry & Chemical Engineering, Northeast Petroleum University, Daqing 163318, PR China
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12
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Degradation of nitrobenzene by trisynergetic attapulgite-supported nanoscale zero-valent iron–biofilm. RESEARCH ON CHEMICAL INTERMEDIATES 2018. [DOI: 10.1007/s11164-018-3534-6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
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13
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Dong J, Dong Y, Wen C, Gao S, Ren L, Bao Q. A 2D tank test on remediation of nitrobenzene-contaminated aquifer using in-situ reactive zone with emulsified nanoscale zero-valent iron. CHEMOSPHERE 2018; 206:766-776. [PMID: 29793069 DOI: 10.1016/j.chemosphere.2018.05.067] [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: 10/21/2017] [Revised: 05/07/2018] [Accepted: 05/12/2018] [Indexed: 06/08/2023]
Abstract
Nitrobenzene (NB) is one of the most challenging pollutants for groundwater remediation due to its great harm and recalcitrance. Emulsified nanoscale zero-valent iron (EZVI) is considered as a promising agent for in-situ remediation of contaminated groundwater for its high reactivity, good durability and low cost. In this paper, 2D tank experiment was conducted to evaluate the effectiveness of enhanced remediation of NB-contaminated groundwater with EZVI. 9 L of EZVI solution was injected into aquifer to establish in-situ reactive zone (IRZ) before 40 d of NB contamination. Results indicate that injection of EZVI leads to 90% reduction of total NB, which is mainly converted to aniline (AN). NB concentration decreases along the flow path in the tank. Fe2+ is generated from Fe0 oxidation. Significant acetate and bicarbonate are released due to emulsified oil decomposition during the whole operation time. Groundwater pH maintains in neutral value (6.6-8.2) owing to the balance between organic acids and OH- released after iron oxidation. Drastic decrease of ORP and DO indicates the transformation from oxidizing to reducing condition, leading to the reduction of oxidative species (e.g. sulfate, nitrate) in subsurface. Calculation of reducing equivalents suggests that microbial breakdown of emulsified oil provides more electrons than Fe0 oxidation does to the system. Both biotic and abiotic processes are involved in the enhanced degradation of NB.
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Affiliation(s)
- Jun Dong
- Key Laboratory of Groundwater Resources and Environment, Ministry of Education, Jilin University, Changchun 130021, China
| | - Yang Dong
- Key Laboratory of Groundwater Resources and Environment, Ministry of Education, Jilin University, Changchun 130021, China
| | - Chunyu Wen
- Key Laboratory of Groundwater Resources and Environment, Ministry of Education, Jilin University, Changchun 130021, China
| | - Song Gao
- Key Laboratory of Groundwater Resources and Environment, Ministry of Education, Jilin University, Changchun 130021, China
| | - Liming Ren
- Key Laboratory of Groundwater Resources and Environment, Ministry of Education, Jilin University, Changchun 130021, China
| | - Qiburi Bao
- Key Laboratory of Groundwater Resources and Environment, Ministry of Education, Jilin University, Changchun 130021, China.
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14
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Solar-mediated thermo-electrochemical oxidation of sodium dodecyl benzene sulfonate by modulating the effective oxidation potential and pathway for green remediation of wastewater. Sci Rep 2017; 7:44683. [PMID: 28294180 PMCID: PMC5353698 DOI: 10.1038/srep44683] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/19/2016] [Accepted: 02/09/2017] [Indexed: 11/30/2022] Open
Abstract
To match the relentless pursuit of three research hot points - efficient solar utilization, green and sustainable remediation of wastewater and advanced oxidation processes, solar-mediated thermo-electrochemical oxidation of surfactant was proposed and developed for green remediation of surfactant wastewater. The solar thermal electrochemical process (STEP), fully driven with solar energy to electric energy and heat and without an input of other energy, sustainably serves as efficient thermo-electrochemical oxidation of surfactant, exemplified by SDBS, in wastewater with the synergistic production of hydrogen. The electrooxidation-resistant surfactant is thermo-electrochemically oxidized to CO2 while hydrogen gas is generated by lowing effective oxidation potential and suppressing the oxidation activation energy originated from the combination of thermochemical and electrochemical effect. A clear conclusion on the mechanism of SDBS degradation can be proposed and discussed based on the theoretical analysis of electrochemical potential by quantum chemical method and experimental analysis of the CV, TG, GC, FT-IR, UV-vis, Fluorescence spectra and TOC. The degradation data provide a pilot for the treatment of SDBS wastewater that appears to occur via desulfonation followed by aromatic-ring opening. The solar thermal utilization that can initiate the desulfonation and activation of SDBS becomes one key step in the degradation process.
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15
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Gu D, Zhang Y, Zhu L, Wang B. Resolving the Thermoinduced Electrochemistry for an In-Depth Understanding of the STEP Degradation of SDBS. J Phys Chem B 2017; 121:1900-1907. [DOI: 10.1021/acs.jpcb.6b12272] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Di Gu
- Provincial Key Laboratory of Oil & Gas Chemical Technology, Institute of New Energy Chemistry and Environmental Science, College of Chemistry and Chemical Engineering, Northeast Petroleum University, Daqing 163318, P. R. China
| | - Yiyang Zhang
- Provincial Key Laboratory of Oil & Gas Chemical Technology, Institute of New Energy Chemistry and Environmental Science, College of Chemistry and Chemical Engineering, Northeast Petroleum University, Daqing 163318, P. R. China
| | - Lingyue Zhu
- Provincial Key Laboratory of Oil & Gas Chemical Technology, Institute of New Energy Chemistry and Environmental Science, College of Chemistry and Chemical Engineering, Northeast Petroleum University, Daqing 163318, P. R. China
| | - Baohui Wang
- Provincial Key Laboratory of Oil & Gas Chemical Technology, Institute of New Energy Chemistry and Environmental Science, College of Chemistry and Chemical Engineering, Northeast Petroleum University, Daqing 163318, P. R. China
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