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Wan J, Guo Y, Zhang Z, Deng R, Wang X, Cao S, Zhang X, Miao Y, Jiang J, Song Z, Long T, Sun C, Zhu X. Persulfate activation with biochar supported nanoscale zero- valent iron: Engineering application for effective degradation of NCB in soil. THE SCIENCE OF THE TOTAL ENVIRONMENT 2024; 933:173053. [PMID: 38723973 DOI: 10.1016/j.scitotenv.2024.173053] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/23/2024] [Revised: 04/20/2024] [Accepted: 05/06/2024] [Indexed: 05/19/2024]
Abstract
Nitrochlorobenzene (NCB) is very common in pesticide and chemical industries, which has become a major problem in soil environment. However, the remediation of NCB contaminated soil is received finite concern. Using biochar as a substrate for nanoscale-zero valent iron (nZVI/p-BC) to activate peroxodisulfate (PDS), a novel heterogeneous oxidative system had been applied in the current study to remediate NCB contaminants in soil. The degradation efficiencies and kinetics of m-NCB, p-NCB, and o-NCB by various systems were contrasted in soil slurry. Key factors including the dosage of nZVI/p-BC, the molar ratio of nZVI/PDS, initial pH and temperature on degradation of NCB were further examined. The results confirmed that the nZVI/p-BC/PDS displayed the remarkable performance for removing NCB compared with other systems. Higher temperature with nZVI/PDS molar ratio of 2:1 under the acidic condition favored the reduction of NCB. The treatment for NCB with optimal conditions were evaluated for the engineering application. The mechanism of nZVI/p-BC/PDS indicated that electron transfer between p-BC and nZVI was responsible for activation of PDS, generating active species (SO4•-, •OH and 1O2) via both the free and non-free radical pathways. Experimental results revealed prominent availability of nZVI/p-BC/PDS system in remediation of actual contaminated field by NCB.
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Affiliation(s)
- Jinzhong Wan
- State Environmental Protection Key Laboratory of Soil Environmental Management and Pollution Control, Nanjing Institute of Environmental Sciences, Ministry of Ecology and Environment, Nanjing 210042, China
| | - Yang Guo
- State Environmental Protection Key Laboratory of Soil Environmental Management and Pollution Control, Nanjing Institute of Environmental Sciences, Ministry of Ecology and Environment, Nanjing 210042, China.
| | - Zehang Zhang
- State Environmental Protection Key Laboratory of Soil Environmental Management and Pollution Control, Nanjing Institute of Environmental Sciences, Ministry of Ecology and Environment, Nanjing 210042, China; College of Environment, Hohai University, Nanjing 210098, China
| | - Rufeng Deng
- State Environmental Protection Key Laboratory of Soil Environmental Management and Pollution Control, Nanjing Institute of Environmental Sciences, Ministry of Ecology and Environment, Nanjing 210042, China; College of Environment, Hohai University, Nanjing 210098, China
| | - Xiang Wang
- State Environmental Protection Key Laboratory of Soil Environmental Management and Pollution Control, Nanjing Institute of Environmental Sciences, Ministry of Ecology and Environment, Nanjing 210042, China
| | - Shaohua Cao
- State Environmental Protection Key Laboratory of Soil Environmental Management and Pollution Control, Nanjing Institute of Environmental Sciences, Ministry of Ecology and Environment, Nanjing 210042, China
| | - Xiaodong Zhang
- State Environmental Protection Key Laboratory of Soil Environmental Management and Pollution Control, Nanjing Institute of Environmental Sciences, Ministry of Ecology and Environment, Nanjing 210042, China
| | - Yifei Miao
- College of Environment, Hohai University, Nanjing 210098, China
| | - Jinlin Jiang
- State Environmental Protection Key Laboratory of Soil Environmental Management and Pollution Control, Nanjing Institute of Environmental Sciences, Ministry of Ecology and Environment, Nanjing 210042, China
| | - Zhen Song
- State Environmental Protection Key Laboratory of Soil Environmental Management and Pollution Control, Nanjing Institute of Environmental Sciences, Ministry of Ecology and Environment, Nanjing 210042, China
| | - Tao Long
- State Environmental Protection Key Laboratory of Soil Environmental Management and Pollution Control, Nanjing Institute of Environmental Sciences, Ministry of Ecology and Environment, Nanjing 210042, China
| | - Cheng Sun
- State Key Laboratory of Pollution Control and Resource Reuse, School of the Environment, Nanjing University, Nanjing 210023, PR China
| | - Xin Zhu
- State Environmental Protection Key Laboratory of Soil Environmental Management and Pollution Control, Nanjing Institute of Environmental Sciences, Ministry of Ecology and Environment, Nanjing 210042, China.
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2
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Liu L, Ruan X, Liu H, Fan X, Dong J. Dechlorination of 2,4-dichlorophenol by Fe/Ni nanoparticles: the pathway and the effect of pH and the Ni mass ratio. ENVIRONMENTAL TECHNOLOGY 2023; 44:3676-3684. [PMID: 35442165 DOI: 10.1080/09593330.2022.2068383] [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: 01/17/2022] [Accepted: 04/08/2022] [Indexed: 06/14/2023]
Abstract
ABSTRACTThe dechlorination of 2,4-dichlorophenol (2,4-DCP) by a nanoscale Fe/Ni material was investigated at room temperature. 2,4-DCP can be removed more quickly by an Fe/Ni material with 2% Ni. Fe/Ni exhibited excellent adsorption and reduction efficiency toward 2,4-DCP in an aqueous solution over a wide range of pH values. The removal rate of 2,4-DCP exceeded 95% in 60 min in the pH range of 3.0-9.0, and more than 75% was dechlorinated to phenol (CA). The degradation pathway of 2,4-DCP was confirmed based on analysis of the intermediate and end products. A portion of 2,4-DCP was first dechlorinated with a chlorine atom to produce 2-chlorophenol and 4-chlorophenol, and then dechlorination was performed sequentially to form CA. The other portion of 2,4-DCP was dechlorinated to remove two chlorine atoms simultaneously to generate CA. The investigations are essential to the application of iron-based remediation technology.
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Affiliation(s)
- Lujian Liu
- Department of Environmental and Biological Engineering, Wuhan Technology and Business University, Wuhan, People's Republic of China
- Junji Environmental Technology Co., Ltd., Wuhan, People's Republic of China
| | - Xia Ruan
- Department of Environmental and Biological Engineering, Wuhan Technology and Business University, Wuhan, People's Republic of China
- Junji Environmental Technology Co., Ltd., Wuhan, People's Republic of China
| | - Hong Liu
- College of Resource and Environmental Engineering, Wuhan University of Science and Technology, Wuhan, People's Republic of China
| | - Xianyuan Fan
- College of Resource and Environmental Engineering, Wuhan University of Science and Technology, Wuhan, People's Republic of China
| | - Jun Dong
- Department of Environmental and Biological Engineering, Wuhan Technology and Business University, Wuhan, People's Republic of China
- Junji Environmental Technology Co., Ltd., Wuhan, People's Republic of China
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Wang Q. Degradation behaviors and accumulative effects of coexisting chlorobenzene congeners on the dechlorination of hexachlorobenzene in soil by nanoscale zero-valent iron. ENVIRONMENTAL GEOCHEMISTRY AND HEALTH 2023; 45:3971-3983. [PMID: 36629959 DOI: 10.1007/s10653-023-01479-x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/04/2022] [Accepted: 01/04/2023] [Indexed: 06/01/2023]
Abstract
It is well known that many chlorinated organic pollutants can be dechlorinated by nanoscale zero-valent iron. However, in the real chlorinated organic compounds contaminated soil, the congeners of high- and low-chlorinated isomer often coexist and their dechlorination behaviors are poorly known, such as hexachlorobenzene (HCB). In this work, the degradation behaviors of three coexisting chlorobenzene congeners pentachlorobenzene (PeCB), 1,2,4,5-tetrachlorobenzene (1,2,4,5-TeCB) and 1,2,4-trichlorobenzene (1,2,4-TCB) and the influence of initial pH and reaction temperature on the dechlorination of HCB in HCB-contaminated soil by nanoscale zero-valent iron were studied. The amount and extent of accumulated coexisting chlorobenzenes was analyzed under different environmental conditions. The results indicate that nanoscale zero-valent iron can improve the degradation efficiency of highly toxic chlorinated benzenes and reduce the accumulative effects of highly toxic chlorinated benzenes on dechlorination of HCB. The accumulative effects of three coexisting chlorobenzene congeners on the dechlorination of HCB were ranked as follows: 1,2,4-TCB > 1,2,4,5-TeCB > PeCB.
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Affiliation(s)
- Qi Wang
- Beijing Key Laboratory for Risk Modeling and Remediation of Contaminated Sites, National Engineering Research Center of Urban Environmental Pollution Control, Beijing Municipal Research Institute of Eco-Environmental Protection, Beijing, 100037, China.
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4
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Hidayat E, Yoshino T, Yonemura S, Mitoma Y, Harada H. A Carbonized Zeolite/Chitosan Composite as an Adsorbent for Copper (II) and Chromium (VI) Removal from Water. MATERIALS (BASEL, SWITZERLAND) 2023; 16:ma16062532. [PMID: 36984412 PMCID: PMC10057389 DOI: 10.3390/ma16062532] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/27/2023] [Revised: 03/20/2023] [Accepted: 03/21/2023] [Indexed: 06/12/2023]
Abstract
To address Cu(II) and Cr(VI) water pollution, a carbonized zeolite/chitosan (C-ZLCH) composite adsorbent was produced via pyrolysis at 500 °C for two hours. C-ZLCH was characterized using scanning electron microscopy (SEM), energy-dispersive spectroscopy (EDS), Fourier transform infrared spectroscopy (FTIR), dynamic light scattering (DLS), and zeta potential measurements. The batch experiments were performed by varying the initial pH, concentration, and contact time. The optimal pH values for Cu(II) and Cr(VI) were 8.1 and 9.6, respectively. The highest adsorption capacities for Cu(II) and Cr(VI) were 111.35 mg/g at 60 min and 104.75 mg/g at 90 min, respectively. The effects of chemicals such as sodium (Na+), glucose, ammonium (NH4+), and acid red 88 (AR88) were also studied. Statistical analysis showed that sodium had no significant effect on Cu(II) removal, in contrast to Cr(VI) removal. However, there was a significant effect of the presence of glucose, ammonium, and AR88 on both Cu(II) and Cr(VI) removal. The adsorption isotherm and kinetic models were fitted using Langmuir and pseudo-second-order models for Cu(II) and Cr(VI), respectively.
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Affiliation(s)
- Endar Hidayat
- Graduate School of Comprehensive and Scientific Research, Prefectural University of Hiroshima, Shobara 727-0023, Japan; (E.H.); (T.Y.); (S.Y.); (Y.M.)
- Department of Life and Environmental Science, Prefectural University of Hiroshima, Shobara 727-0023, Japan
| | - Tomoyuki Yoshino
- Graduate School of Comprehensive and Scientific Research, Prefectural University of Hiroshima, Shobara 727-0023, Japan; (E.H.); (T.Y.); (S.Y.); (Y.M.)
- Department of Life and Environmental Science, Prefectural University of Hiroshima, Shobara 727-0023, Japan
| | - Seiichiro Yonemura
- Graduate School of Comprehensive and Scientific Research, Prefectural University of Hiroshima, Shobara 727-0023, Japan; (E.H.); (T.Y.); (S.Y.); (Y.M.)
- Department of Life and Environmental Science, Prefectural University of Hiroshima, Shobara 727-0023, Japan
| | - Yoshiharu Mitoma
- Graduate School of Comprehensive and Scientific Research, Prefectural University of Hiroshima, Shobara 727-0023, Japan; (E.H.); (T.Y.); (S.Y.); (Y.M.)
- Department of Life and Environmental Science, Prefectural University of Hiroshima, Shobara 727-0023, Japan
| | - Hiroyuki Harada
- Graduate School of Comprehensive and Scientific Research, Prefectural University of Hiroshima, Shobara 727-0023, Japan; (E.H.); (T.Y.); (S.Y.); (Y.M.)
- Department of Life and Environmental Science, Prefectural University of Hiroshima, Shobara 727-0023, Japan
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Wang Y, Li G, Wang Q, Chen X, Sun C. The kinetic reaction of anaerobic microbial chloerobenzenes degradation in contaminated soil. CHEMICAL ENGINEERING JOURNAL ADVANCES 2022. [DOI: 10.1016/j.ceja.2022.100414] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/31/2022] Open
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6
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Essawy AA, Abdel-Farid IB. Hybrid solvothermal/sonochemical-mediated synthesis of ZnO NPs generative of OH radicals: Photoluminescent approach to evaluate OH scavenging activity of Egyptian and Yemeni Punica granatum arils extract. ULTRASONICS SONOCHEMISTRY 2022; 89:106152. [PMID: 36055013 PMCID: PMC9445396 DOI: 10.1016/j.ultsonch.2022.106152] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 06/11/2022] [Revised: 08/25/2022] [Accepted: 08/28/2022] [Indexed: 06/15/2023]
Abstract
Zinc oxide NPs were synthesized solvothermally within sonochemical mediation and characterized by XRD, FTIR, SEM, EDX, elemental mapping, TEM and UV-vis. spectrophotometry. To evaluate the hydroxyl radicals (OH) scavenging activity of arils extract of Egyptian (EGY-PAM) and Yemeni Punica granatum (YEM-PAM), the developed zinc oxide nano particles (ZnO NPs) as a highly productive source of hydroxyl radicals (under Solar-illumination) was used. The yield of OH was trapped and probed via fluorimetric monitoring. This suits the first sensitive/selective photoluminescent avenue to evaluate the OH scavenging activity. The high percentage of DPPH radical scavenging reflected higher contents of phenolics, flavonoids, and anthocyanins that were found in EGY-PAM and YEM-PAM. Although, some secondary metabolites contents were significantly different in EGY-PAM and YEM-PAM, the traditional DPPH radical scavenging methodology revealed insignificant IC50. Unlike, the developed fluorimetric probing, sensitively discriminated the OH scavenging activity with IC50 (105.7 µg/mL) and lower rate of OH productivity (k = 0.031 min-1) in case of EGY-PAM in comparison to IC50 (153.4 µg/mL) and higher rate of OH productivity (k = 0.053 min-1) for YEM-PAM. Our findings are interestingly superior to the TBHQ that is synthetic antioxidant. Moreover, our developed methodology for fluorimetric probing of OH radicals scavenging, recommends EGY-PAM as OH radicals scavenger for diabetic patients while YEM-PAM exhibited a better OH radicals scavenging appropriate for high blood pressure patients. More interestingly, EGY-PAM and YEM-PAM exhibited high anticancer potentiality. The aforementioned OH and DPPH scavenging activities as well as the anticancer potentiality present EGY-PAM and YEM-PAM as promising sources of natural antioxidants, that may have crucial roles in some chronic diseases such as diabetics and hypertension in addition to cancer therapeutic protocols.
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Affiliation(s)
- Amr A Essawy
- Chemistry Department, College of Science, Jouf University, Sakaka P.O. Box 2014, Saudi Arabia; Chemistry Department, Faculty of Science, Fayoum University, 63514 Fayoum, Egypt.
| | - Ibrahim B Abdel-Farid
- Biology Department, College of Science, Jouf University, Sakaka P.O. Box 2014, Saudi Arabia; Botany Department, Faculty of Science, Aswan University, Aswan, Egypt
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7
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Boulkhessaim S, Gacem A, Khan SH, Amari A, Yadav VK, Harharah HN, Elkhaleefa AM, Yadav KK, Rather SU, Ahn HJ, Jeon BH. Emerging Trends in the Remediation of Persistent Organic Pollutants Using Nanomaterials and Related Processes: A Review. NANOMATERIALS 2022; 12:nano12132148. [PMID: 35807983 PMCID: PMC9268313 DOI: 10.3390/nano12132148] [Citation(s) in RCA: 12] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 04/18/2022] [Revised: 06/17/2022] [Accepted: 06/20/2022] [Indexed: 02/06/2023]
Abstract
Persistent organic pollutants (POPs) have become a major global concern due to their large amount of utilization every year and their calcitrant nature. Due to their continuous utilization and calcitrant nature, it has led to several environmental hazards. The conventional approaches are expensive, less efficient, laborious, time-consuming, and expensive. Therefore, here in this review the authors suggest the shortcomings of conventional techniques by using nanoparticles and nanotechnology. Nanotechnology has shown immense potential for the remediation of such POPs within a short period of time with high efficiency. The present review highlights the use of nanoremediation technologies for the removal of POPs with a special focus on nanocatalysis, nanofiltration, and nanoadsorption processes. Nanoparticles such as clays, zinc oxide, iron oxide, aluminum oxide, and their composites have been used widely for the efficient remediation of POPs. Moreover, filtrations such as nanofiltration and ultrafiltration have also shown interest in the remediation of POPs from wastewater. From several pieces of literature, it has been found that nano-based techniques have shown complete removal of POPs from wastewater in comparison to conventional methods, but the cost is one of the major issues when it comes to nano- and ultrafiltration. Future research in nano-based techniques for POP remediation will solve the cost issue and will make it one of the most widely accepted and available techniques. Nano-based processes provide a sustainable solution to the problem of POPs.
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Affiliation(s)
- Salim Boulkhessaim
- Department of Physics, Faculty of Sciences, University 20 Août 1955, 26 El Hadaiek, Skikda 21000, Algeria; (S.B.); (A.G.)
| | - Amel Gacem
- Department of Physics, Faculty of Sciences, University 20 Août 1955, 26 El Hadaiek, Skikda 21000, Algeria; (S.B.); (A.G.)
| | - Samreen Heena Khan
- Research & Development Centre, YNC Envis Pvt Ltd., New Delhi 110001, India
- Correspondence: (S.H.K.); (B.-H.J.)
| | - Abdelfattah Amari
- Department of Chemical Engineering, College of Engineering, King Khalid University, Abha 61421, Saudi Arabia; (A.A.); (H.N.H.); (A.M.E.)
- Department of Chemical Engineering and Processes, Research Laboratory of Processes, Energetics, Environment and Electrical Systems, National School of Engineers, Gabes University, Gabes 6072, Tunisia
| | - Virendra Kumar Yadav
- Department of Biosciences, School of Liberal Arts & Sciences, Mody University of Science and Technology, Lakshmangarh 332311, India;
| | - Hamed N. Harharah
- Department of Chemical Engineering, College of Engineering, King Khalid University, Abha 61421, Saudi Arabia; (A.A.); (H.N.H.); (A.M.E.)
| | - Abubakr M. Elkhaleefa
- Department of Chemical Engineering, College of Engineering, King Khalid University, Abha 61421, Saudi Arabia; (A.A.); (H.N.H.); (A.M.E.)
| | - Krishna Kumar Yadav
- Faculty of Science and Technology, Madhyanchal Professional University, Ratibad, Bhopal 462044, India;
| | - Sami-ullah Rather
- Department of Chemical and Materials Engineering, King Abdulaziz University, P.O. Box 80204, Jeddah 21589, Saudi Arabia;
| | - Hyun-Jo Ahn
- Department of Earth Resources and Environmental Engineering, Hanyang University, Seoul 04763, Korea;
| | - Byong-Hun Jeon
- Department of Earth Resources and Environmental Engineering, Hanyang University, Seoul 04763, Korea;
- Correspondence: (S.H.K.); (B.-H.J.)
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Kuo CS, Kuo DTF, Chang A, Wang K, Chou PH, Shih YH. Rapid debromination of tetrabromobisphenol A by Cu/Fe bimetallic nanoparticles in water, its mechanisms, and genotoxicity after treatments. JOURNAL OF HAZARDOUS MATERIALS 2022; 432:128630. [PMID: 35299103 DOI: 10.1016/j.jhazmat.2022.128630] [Citation(s) in RCA: 10] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/12/2021] [Revised: 02/22/2022] [Accepted: 03/02/2022] [Indexed: 06/14/2023]
Abstract
Tetrabromobisphenol A (TBBPA), a widely used brominated flame retardants, has been detected in various environmental matrices and is known to cause various adverse effects on human bodies. This study examined the feasibility and effectiveness of remediating TBBPA using Cu/Fe bimetallic nanoparticles (Cu/Fe BNPs) at various environmental and operational conditions. In general, TBBPA removal rate and debromination efficiency increased with higher Cu doping, higher Cu/Fe BNPs loading, higher temperature, and lower pH. At optimal conditions, TBBPA was completed removed at a rate constant > 0.2 min-1 where over 90% TBBPA was transformed to BPA within 30 min. The activation energy was found to be 35.6 kJ/mol, indicating that TBBPA was predominantly removed via surface-controlled reactions. Under pH 3-7 and ≥ 25 °C, debromination was the dominant removal mechanism compared to adsorption. The complete debromination pathway and the time-evolution of intermediates byproducts at different pHs were also presented. Cu/Fe BNPs can be reused for more than 6 times with performance constancy. Genotoxic tests showed that the treated solution did not find a significant hazardous potential. The byproducts can be further degraded by additional H2O2 through Fenton reaction. These results demonstrated the efficacy of Cu/Fe BNPs for treating TBBPA and its potential for degrading other halogenated organic compounds.
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Affiliation(s)
- Chin-Shun Kuo
- Department of Agricultural Chemistry, National Taiwan University, Taipei, Taiwan
| | - Dave Ta Fu Kuo
- Civil and Architectural Engineering, City University of Hong Kong, Hong Kong, China; Kuo Research & Consulting, Toronto, Canada
| | - Andy Chang
- Air Permit Division, Texas Commission on Environmental Quality, United States
| | - Kai Wang
- Department of Agricultural Chemistry, National Taiwan University, Taipei, Taiwan
| | - Pei-Hsin Chou
- Department of Environmental Engineering, National Cheng Kung University, Tainan, Taiwan
| | - Yang-Hsin Shih
- Department of Agricultural Chemistry, National Taiwan University, Taipei, Taiwan.
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Computational-Based Approaches for Predicting Biochemical Oxygen Demand (BOD) Removal in Adsorption Process. ADSORPT SCI TECHNOL 2022. [DOI: 10.1155/2022/9739915] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2023] Open
Abstract
Predicting the adsorption performance to remove organic pollutants from wastewater is an essential environmental-related topic, requiring knowledge of various statistical tools and artificial intelligence techniques. Hence, this study is the first to develop a quadratic regression model and artificial neural network (ANN) for predicting biochemical oxygen demand (BOD) removal under different adsorption conditions. Nanozero-valent iron encapsulated into cellulose acetate (CA/nZVI) was synthesized, characterized by XRD, SEM, and EDS, and used as an efficient adsorbent for BOD reduction. Results indicated that the medium pH and adsorption time should be adjusted around 7 and 30 min, respectively, to maintain the highest BOD removal efficiency of 96.4% at initial BOD
mg/L, mixing
rpm, and adsorbent dosage of 3 g/L. An optimized ANN structure of 5–10–1, with the “trainlm” back-propagation learning algorithm, achieved the highest predictive performance for BOD removal (
: 0.972, Adj-
: 0.971, RMSE: 1.449, and SSE: 56.680). Based on the ANN sensitivity analysis, the relative importance of the adsorption factors could be arranged as
. A quadratic regression model was developed to visualize the impacts of adsorption factors on the BOD removal efficiency, optimizing pH at 7.3 and time at 46.2 min. The accuracy of the quadratic regression and ANN models in predicting BOD removal was approximately comparable. Hence, these computational-based methods could further maximize the performance of CA/nZVI material for removing BOD from wastewater under different adsorption conditions. The applicability of these modeling techniques would guide the stakeholders and industrial sector to overcome the nonlinearity and complexity issues related to the adsorption process.
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Yang X, Yu G, Xu L, Wang J. Degradation of the mixed organic solvents of tributyl phosphate and n-dodecane by heterogeneous Fenton-like oxidation using nanoscale zero-valent iron as the catalyst. CHEMOSPHERE 2022; 292:133449. [PMID: 34973247 DOI: 10.1016/j.chemosphere.2021.133449] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/07/2021] [Revised: 12/08/2021] [Accepted: 12/24/2021] [Indexed: 06/14/2023]
Abstract
The treatment and disposal of spent radioactive organic solvents, i.e., tributyl phosphate (TBP) and diluent (such as kerosene, n-dodecane, etc.), produced in the reprocessing of spent fuel in the closed cycle are crucial for the sustainable development of the nuclear industry. In this study, the synthesized nanoscale zero-valent iron (nZVI) was used as the heterogeneous Fenton-like catalyst to promote the generation of hydroxyl radicals (•OH) by reacting with H2O2 to degrade the mixed organic solvents of TBP and n-dodecane. nZVI was characterized by scanning electron microscopy (SEM), nitrogen adsorption/desorption isotherms, and X-ray photoelectron spectroscopy (XPS) to investigate the micro-morphology, nano-particle size, and surface valence state. The change of Fe2+/Fe3+ concentration ratio during the reaction was measured to clarify the performance of nZVI. The effects of temperature, catalyst dosage, H2O2 dosage, and acidifier concentration on the degradation of TBP and n-dodecane were studied, and the results were complemented by the COD of the aqueous solution and the volume reduction rate of the organic phase. The mixed organic solvents of TBP and n-dodecane containing Co2+ were used to simulate the spent radioactive organic solvents and to study the distribution of nuclides after the reaction. The results showed that most of the radioactivity was in the residual solution, and the condensate contained almost no radioactivity. The degradation of TBP and n-dodecane was carried out separately, which showed that n-dodecane was more difficult to degrade. Density functional theory (DFT) calculations were applied to determine the adsorption energy of organic solvents and nZVI. According to the Fourier transform infrared spectra (FTIR) and their corresponding DFT calculations, liquid chromatography-mass spectrometry (LC-MS) and gas chromatography-mass spectrometry (GC-MS) of the sample after the reaction, the possible intermediates were analyzed, and the degradation mechanism was speculated.
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Affiliation(s)
- Xingchen Yang
- Department of Nuclear Engineering and Technology, School of Energy and Power Engineering, Huazhong University of Science and Technology, Wuhan, 430074, PR China; China-EU Institute for Clean and Renewable Energy, Huazhong University of Science and Technology, Wuhan, 430074, PR China
| | - Guoce Yu
- Institute of Nuclear and New Energy Technology, Key Laboratory of Advanced Reactor Engineering and Safety of Ministry of Education, Tsinghua University, Beijing, 100084, PR China; Beijing Key Laboratory of Radioactive Wastes Treatment, Tsinghua University, Beijing, 100084, PR China
| | - Lejin Xu
- Department of Nuclear Engineering and Technology, School of Energy and Power Engineering, Huazhong University of Science and Technology, Wuhan, 430074, PR China; China-EU Institute for Clean and Renewable Energy, Huazhong University of Science and Technology, Wuhan, 430074, PR China.
| | - Jianlong Wang
- Institute of Nuclear and New Energy Technology, Key Laboratory of Advanced Reactor Engineering and Safety of Ministry of Education, Tsinghua University, Beijing, 100084, PR China; Beijing Key Laboratory of Radioactive Wastes Treatment, Tsinghua University, Beijing, 100084, PR China
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Lei M, Shen F, Hu J, Zhao L, Huang M, Zou J, Tian D, Yang G, Zeng Y, Deng S. A novel way to facilely degrade organic pollutants with the tail-gas derived from PHP (phosphoric acid plus hydrogen peroxide) pretreatment of lignocellulose. JOURNAL OF HAZARDOUS MATERIALS 2022; 424:127517. [PMID: 34688009 DOI: 10.1016/j.jhazmat.2021.127517] [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: 05/12/2021] [Revised: 09/18/2021] [Accepted: 10/13/2021] [Indexed: 06/13/2023]
Abstract
The abundantly released tail-gas from lignocellulose pretreatment with phosphoric acid plus hydrogen peroxide (PHP) was found to accelerate the aging of latex/silicone textural accessories of the pretreatment device. Inspired by this, tail-gas was utilized to control organic pollutants. Methylene blue (MB), as a model pollutant, was rapidly decolorized by the tail-gas, and oxidative degradation was substantially proven by full-wavelength scanning with a UV-visible spectrometer. The tail-gas from six typical lignocellulosic feedstocks produced 68.0-98.3% MB degradation, suggesting its wide feedstock compatibility. Three other dyes, including rhodamine B, methyl orange and malachite green, obtained 97.5-99.5% degradation; moreover, tetracycline, resorcinol and hexachlorobenzene achieved 73.8-93.7% degradation, suggesting a superior pollutant compatibility. In a cytotoxicity assessment, the survival rate of the degraded MB was 103.5% compared with 80.4% for the untreated MB, implying almost no cytotoxicity after MB degradation. Mechanism investigations indicated that the self-exothermic reaction in PHP pretreatment drove the self-generated peroxy acids into tail-gas. Moreover, it heated the pollutant solution and thermally activated peroxy acids as free radicals for efficient pollutant degradation. Here, a brand-new technique for degrading organic pollutants with a "Win-Win-Win" concept was purposed for lignocellulose valorization, pollutant control by waste tail-gas, and biofuel production.
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Affiliation(s)
- Miao Lei
- Institute of Ecological and Environmental Sciences, Sichuan Agricultural University, Chengdu, Sichuan 611130, PR China; Rural Environment Protection Engineering & Technology Center of Sichuan Province, Sichuan Agricultural University, Chengdu, Sichuan 611130, PR China
| | - Fei Shen
- Institute of Ecological and Environmental Sciences, Sichuan Agricultural University, Chengdu, Sichuan 611130, PR China; Rural Environment Protection Engineering & Technology Center of Sichuan Province, Sichuan Agricultural University, Chengdu, Sichuan 611130, PR China.
| | - Jinguang Hu
- Chemical and Petroleum Engineering, Schulich School of Engineering, The University of Calgary, Calgary T2N 4H9, Canada
| | - Li Zhao
- Institute of Ecological and Environmental Sciences, Sichuan Agricultural University, Chengdu, Sichuan 611130, PR China; Rural Environment Protection Engineering & Technology Center of Sichuan Province, Sichuan Agricultural University, Chengdu, Sichuan 611130, PR China
| | - Mei Huang
- Institute of Ecological and Environmental Sciences, Sichuan Agricultural University, Chengdu, Sichuan 611130, PR China; Rural Environment Protection Engineering & Technology Center of Sichuan Province, Sichuan Agricultural University, Chengdu, Sichuan 611130, PR China
| | - Jianmei Zou
- Institute of Ecological and Environmental Sciences, Sichuan Agricultural University, Chengdu, Sichuan 611130, PR China; Rural Environment Protection Engineering & Technology Center of Sichuan Province, Sichuan Agricultural University, Chengdu, Sichuan 611130, PR China
| | - Dong Tian
- Institute of Ecological and Environmental Sciences, Sichuan Agricultural University, Chengdu, Sichuan 611130, PR China; Rural Environment Protection Engineering & Technology Center of Sichuan Province, Sichuan Agricultural University, Chengdu, Sichuan 611130, PR China
| | - Gang Yang
- Institute of Ecological and Environmental Sciences, Sichuan Agricultural University, Chengdu, Sichuan 611130, PR China; Rural Environment Protection Engineering & Technology Center of Sichuan Province, Sichuan Agricultural University, Chengdu, Sichuan 611130, PR China
| | - Yongmei Zeng
- Institute of Ecological and Environmental Sciences, Sichuan Agricultural University, Chengdu, Sichuan 611130, PR China; Rural Environment Protection Engineering & Technology Center of Sichuan Province, Sichuan Agricultural University, Chengdu, Sichuan 611130, PR China
| | - Shihuai Deng
- Institute of Ecological and Environmental Sciences, Sichuan Agricultural University, Chengdu, Sichuan 611130, PR China; Rural Environment Protection Engineering & Technology Center of Sichuan Province, Sichuan Agricultural University, Chengdu, Sichuan 611130, PR China
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12
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Applicability of Nickel-Based Catalytic Systems for Hydrodehalogenation of Recalcitrant Halogenated Aromatic Compounds. Catalysts 2021. [DOI: 10.3390/catal11121465] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022] Open
Abstract
This review summarizes recent applications of nickel as a nonprecious metal catalyst in hydrodehalogenation (HDH) reactions of halogenated aromatic compounds (Ar–Xs). Nickel-based HDH catalysts were developed for reductive treatment of both waste containing concentrated Ar–Xs (mainly polychlorinated benzenes) and for wastewater contaminated with Ar–Xs. Ni-catalyzed HDH enables the production of corresponding nonhalogenated aromatic products (Ar–Hs), which are principally further applicable/recyclable and/or Ar–Hs, which are much more biodegradable and can be mineralized during aerobic wastewater treatment. Developed HDH methods enable the utilization of both gaseous hydrogen via the direct HDH process or other chemical reductants as a source of hydrogen utilized in the transfer of the hydrodehalogenation process. This review highlights recent and major developments in Ni-catalyzed hydrodehalogenation topic since 1990.
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13
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Zhu X, Li Y, Han B, Feng Q, Zhou L. Degradation Characteristics of Carbon Tetrachloride by Granular Sponge Zero Valent Iron. INTERNATIONAL JOURNAL OF ENVIRONMENTAL RESEARCH AND PUBLIC HEALTH 2021; 18:ijerph182312578. [PMID: 34886303 PMCID: PMC8672278 DOI: 10.3390/ijerph182312578] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 11/03/2021] [Revised: 11/25/2021] [Accepted: 11/27/2021] [Indexed: 11/29/2022]
Abstract
Granular sponge zero valent iron (ZVI) was employed to degrade carbon tetrachloride (CCl4). The effects of acidic washing, initial solution pH, and ZVI dosage on CCl4 degradation were investigated. Results showed that CCl4 was effectively removed by ZVI and approximately 75% of CCl4 was transformed into chloroform through hydrogenolysis. The rate of chloroform transformation was slower compared to that of CCl4, resulting in chloroform accumulation. CCl4 degradation was a pseudo first-order process. The observed pseudo first-order reaction rate constant (kobs) for CCl4 and chloroform were 0.1139 and 0.0109 h−1, respectively, with a ZVI dosage of 20 g/L and an initial CCl4 concentration of 20 mg/L. Surface acidic washing had a negligible effect on CCl4 degradation with ZVI. The kobs for CCl4 degradation increased linearly with increasing ZVI dosage and the optimal dosage of ZVI was 20 g/L based on the surface area-normalized rate constants. The negative relationship between kobs and the solution pH indicated that the degradation of CCl4 by ZVI performed better under weakly acidic conditions.
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Affiliation(s)
- Xueqiang Zhu
- School of Environmental Science and Spatial Informatics, China University of Mining and Technology, Xuzhou 221116, China; (Q.F.); (L.Z.)
- Correspondence: ; Tel.: +86-13813290158
| | - Yuncong Li
- Department of Soil and Water Sciences, Tropical Research and Education Center, University of Florida, Homestead, FL 33031, USA;
| | - Baoping Han
- School of Geography & Geomatics and Urban-Rural Planning, Jiangsu Normal University, Xuzhou 221116, China;
| | - Qiyan Feng
- School of Environmental Science and Spatial Informatics, China University of Mining and Technology, Xuzhou 221116, China; (Q.F.); (L.Z.)
| | - Lai Zhou
- School of Environmental Science and Spatial Informatics, China University of Mining and Technology, Xuzhou 221116, China; (Q.F.); (L.Z.)
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14
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Ye J, Luo Y, Sun J, Shi J. Nanoscale Zero-Valent Iron Modified by Bentonite with Enhanced Cr(VI) Removal Efficiency, Improved Mobility, and Reduced Toxicity. NANOMATERIALS (BASEL, SWITZERLAND) 2021; 11:2580. [PMID: 34685019 PMCID: PMC8537176 DOI: 10.3390/nano11102580] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 08/24/2021] [Revised: 09/18/2021] [Accepted: 09/28/2021] [Indexed: 12/28/2022]
Abstract
The aggregation of nanoscale zero-valent iron (nZVI) particles and their limited transport ability in environmental media hinder their application in environmental remediation. In this study, the Cr(VI) removal efficiency, transport performance, and toxicity of nZVI and bentonite-modified nZVI (B-nZVI) were investigated. Compared with nZVI, B-nZVI improved the removal efficiency of Cr(VI) by 10%, and also significantly increased the transport in quartz sand and soil. Increasing the flow rate can enhance the transport of nZVI and B-nZVI in the quartz sand columns. The transport of the two materials in different soils was negatively correlated with the clay composition. Besides, modification of nZVI by bentonite could reduce toxicity to luminous bacteria (Photobacterium phosphereum T3) and ryegrass (Lolium perenne L.). Compared with Fe-EDTA, the transfer factors of nZVI and B-nZVI were 65.0% and 66.4% lower, respectively. This indicated that although iron nanoparticles accumulated in the roots of ryegrass, they were difficult to be transported to the shoots. The results of this study indicate that B-nZVI has a strong application potential in in situ environmental remediation.
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Affiliation(s)
- Jien Ye
- Department of Environmental Engineering, College of Environmental and Resource Sciences, Zhejiang University, Hangzhou 310058, China; (J.Y.); (Y.L.); (J.S.)
- MOE Key Laboratory of Environment Remediation and Ecological Health, College of Environmental & Resource Science, Zhejiang University, Hangzhou 310058, China
| | - Yating Luo
- Department of Environmental Engineering, College of Environmental and Resource Sciences, Zhejiang University, Hangzhou 310058, China; (J.Y.); (Y.L.); (J.S.)
- MOE Key Laboratory of Environment Remediation and Ecological Health, College of Environmental & Resource Science, Zhejiang University, Hangzhou 310058, China
| | - Jiacong Sun
- Department of Environmental Engineering, College of Environmental and Resource Sciences, Zhejiang University, Hangzhou 310058, China; (J.Y.); (Y.L.); (J.S.)
- MOE Key Laboratory of Environment Remediation and Ecological Health, College of Environmental & Resource Science, Zhejiang University, Hangzhou 310058, China
| | - Jiyan Shi
- Department of Environmental Engineering, College of Environmental and Resource Sciences, Zhejiang University, Hangzhou 310058, China; (J.Y.); (Y.L.); (J.S.)
- MOE Key Laboratory of Environment Remediation and Ecological Health, College of Environmental & Resource Science, Zhejiang University, Hangzhou 310058, China
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15
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Li X, Zeng L, Wen N, Deng D. Critical roles of sulfidation solvent in controlling surface properties and the dechlorination reactivity of S-nZVI. JOURNAL OF HAZARDOUS MATERIALS 2021; 417:126014. [PMID: 34229377 DOI: 10.1016/j.jhazmat.2021.126014] [Citation(s) in RCA: 14] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/06/2020] [Revised: 03/14/2021] [Accepted: 04/30/2021] [Indexed: 06/13/2023]
Abstract
Sulfidation of nanoscale zero-valent iron (nZVI) has been frequently applied to enhance its reactivity, selectivity, and electron utilization efficiency. However, sulfidation of nZVI is generally carried out in aqueous solution, and formation of passivated iron (hydro)oxide species on the surface of S-nZVI due to the reaction between nZVI and water is inevitable. To mitigate this issue, sulfidation of nZVI with hydrogen sulfide dissolved in absolute ethanol was developed. The properties of the resultant S-nZVI, denoted as S-nZVI-H2S-Ethanol, were compared with S-nZVIs prepared through sulfidation of nZVI with aqueous hydrogen sulfide (S-nZVI-H2S-Water) and aqueous sodium sulfide (S-nZVI-Na2S-Water). S-nZVI-H2S-Ethanol shows increased BET specific surface, reduced susceptibility to incidental oxidation, increased reduction potential, decreased electron-transfer resistance, and improved reactivity toward the reduction of trichloroethylene, compared with S-nZVI-Na2S-Water and S-nZVI-H2S-Water. The results highlight the critical roles of sulfidation solvent in controlling the structure, the physicochemical and electrochemical properties, and the dechlorination reactivity of S-nZVI. In addition, these findings offer fundamental mechanistic insights into the sulfidation processes of nZVI by sulfides, suggesting that solvent-iron (hydro)oxide and sulfide-iron (hydro)oxide interactions at the solvent/nZVI interface play key roles in regulating the sulfidation of nZVI and the properties of S-nZVI.
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Affiliation(s)
- Xiaoyuan Li
- School of Environment, South China Normal University, Guangzhou, Guangdong 510006, China
| | - Lili Zeng
- School of Environment, South China Normal University, Guangzhou, Guangdong 510006, China
| | - Nihong Wen
- School of Environment, South China Normal University, Guangzhou, Guangdong 510006, China
| | - Dayi Deng
- School of Environment, South China Normal University, Guangzhou, Guangdong 510006, China.
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16
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Ye J, Wang Y, Xu Q, Wu H, Tong J, Shi J. Removal of hexavalent chromium from wastewater by Cu/Fe bimetallic nanoparticles. Sci Rep 2021; 11:10848. [PMID: 34035405 PMCID: PMC8149398 DOI: 10.1038/s41598-021-90414-0] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/08/2020] [Accepted: 05/04/2021] [Indexed: 11/09/2022] Open
Abstract
Passivation of nanoscale zerovalent iron hinders its efficiency in water treatment, and loading another catalytic metal has been found to improve the efficiency significantly. In this study, Cu/Fe bimetallic nanoparticles were prepared by liquid-phase chemical reduction for removal of hexavalent chromium (Cr(VI)) from wastewater. Synthesized bimetallic nanoparticles were characterized by transmission electron microscopy, Brunauer-Emmet-Teller isotherm, and X-ray diffraction. The results showed that Cu loading can significantly enhance the removal efficiency of Cr(VI) by 29.3% to 84.0%, and the optimal Cu loading rate was 3% (wt%). The removal efficiency decreased with increasing initial pH and Cr(VI) concentration. The removal of Cr(VI) was better fitted by pseudo-second-order model than pseudo-first-order model. Thermodynamic analysis revealed that the Cr(VI) removal was spontaneous and endothermic, and the increase of reaction temperature facilitated the process. X-ray photoelectron spectroscopy (XPS) analysis indicated that Cr(VI) was completely reduced to Cr(III) and precipitated on the particle surface as hydroxylated Cr(OH)3 and CrxFe1-x(OH)3 coprecipitation. Our work could be beneficial for the application of iron-based nanomaterials in remediation of wastewater.
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Affiliation(s)
- Jien Ye
- Department of Environmental Engineering, College of Environmental and Resource Sciences, Zhejiang University, Hangzhou, 310058, China
- MOE Key Laboratory of Environment Remediation and Ecological Health, College of Environmental and Resource Science, Zhejiang University, Hangzhou, 310058, China
| | - Yi Wang
- Department of Environmental Engineering, College of Environmental and Resource Sciences, Zhejiang University, Hangzhou, 310058, China
- MOE Key Laboratory of Environment Remediation and Ecological Health, College of Environmental and Resource Science, Zhejiang University, Hangzhou, 310058, China
| | - Qiao Xu
- Department of Environmental Engineering, College of Environmental and Resource Sciences, Zhejiang University, Hangzhou, 310058, China
- MOE Key Laboratory of Environment Remediation and Ecological Health, College of Environmental and Resource Science, Zhejiang University, Hangzhou, 310058, China
| | - Hanxin Wu
- Department of Environmental Engineering, College of Environmental and Resource Sciences, Zhejiang University, Hangzhou, 310058, China
- MOE Key Laboratory of Environment Remediation and Ecological Health, College of Environmental and Resource Science, Zhejiang University, Hangzhou, 310058, China
| | - Jianhao Tong
- Department of Environmental Engineering, College of Environmental and Resource Sciences, Zhejiang University, Hangzhou, 310058, China
- MOE Key Laboratory of Environment Remediation and Ecological Health, College of Environmental and Resource Science, Zhejiang University, Hangzhou, 310058, China
| | - Jiyan Shi
- Department of Environmental Engineering, College of Environmental and Resource Sciences, Zhejiang University, Hangzhou, 310058, China.
- MOE Key Laboratory of Environment Remediation and Ecological Health, College of Environmental and Resource Science, Zhejiang University, Hangzhou, 310058, China.
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17
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Suzuki M, Suzuki Y, Uzuka K, Kawase Y. Biological treatment of non-biodegradable azo-dye enhanced by zero-valent iron (ZVI) pre-treatment. CHEMOSPHERE 2020; 259:127470. [PMID: 32603967 DOI: 10.1016/j.chemosphere.2020.127470] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/26/2020] [Revised: 06/13/2020] [Accepted: 06/16/2020] [Indexed: 06/11/2023]
Abstract
Zero-valent iron (ZVI) pre-treatment in sequential strategy for removal of non-biodegradable azo-dye Orange II by activated-sludge was quantitatively examined. The decolorization and TOC (total organic carbon) removal of Orange II by ZVI pre-treatment were examined in the ranges of pH from 3 to 11 and ZVI dosage from 500 to 2000 mgL-1. While the decolorization was enhanced with decreasing pH and the optimal pH for decolorization was found at pH 3, the TOC removal rate at pH 3 remained at 22.2% and the maximum TOC removal rate of 78.2% was obtained at pH 4. The decolorization and TOC removal of Orange II were monotonously increased with increasing ZVI dosage. To quantify the ZVI pre-treatment, the contributions of redox degradation, complexation/precipitation and adsorption to TOC removal by ZVI were defined. Novel kinetic models for the ZVI pre-treatment and activated-sludge post-treatment were developed. The proposed kinetic models satisfactorily predicted the transitional behaviors of the ZVI pre-treatment and activated-sludge post-treatment and the contributions of redox degradation, complexation/precipitation and adsorption to TOC removal by the ZVI pre-treatment. The complete removal of non-biodegradable azo-dye Orange II of 300 mgL-1 was accomplished by 78.2% removal after 360 min ZVI pre-treatment with the ZVI dosage of 1000 mgL-1 at pH 4 and subsequently 21.8% removal after 480 min activated-sludge post-treatment. The ZVI pre-treatment integrated with activated-sludge post-treatment was proved to be an effective strategy for treating non-biodegradable pollutants.
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Affiliation(s)
- Moe Suzuki
- Research Center of Biochemical and Environmental Engineering, Department of Applied Chemistry, Toyo University, Kawagoe, Saitama, 350-8585, Japan
| | - Yutaka Suzuki
- Research Center of Biochemical and Environmental Engineering, Department of Applied Chemistry, Toyo University, Kawagoe, Saitama, 350-8585, Japan
| | - Kei Uzuka
- Research Center of Biochemical and Environmental Engineering, Department of Applied Chemistry, Toyo University, Kawagoe, Saitama, 350-8585, Japan
| | - Yoshinori Kawase
- Research Center of Biochemical and Environmental Engineering, Department of Applied Chemistry, Toyo University, Kawagoe, Saitama, 350-8585, Japan.
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18
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Fan G, Liu X, Li X, Lin C, He M, Ouyang W. Mechanochemical treatment with CaO-activated PDS of HCB contaminated soils. CHEMOSPHERE 2020; 257:127207. [PMID: 32505949 DOI: 10.1016/j.chemosphere.2020.127207] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/25/2020] [Revised: 05/14/2020] [Accepted: 05/23/2020] [Indexed: 06/11/2023]
Abstract
Mechanochemical methods with co-milling reagents have been widely used to degrade organic pollutants. In this study, calcium oxide and persulfate were employed as co-milling reagents in a mechanochemical process that showed highly effective degradation of hexachlorobenzene in contaminated soil. The influences of soil particle size and organic matter content were also investigated. The interaction between different factors was analyzed by response surface methodology, and a multi-variate regression equation was obtained relating the soil-to-oxidant mass ratio, rotation speed and organic matter content. The existence of SO4- and OH during the mechanochemical reaction was proved by the indirect detection of benzoquinone and p-hydroxybenzoic acid for the first time, providing a new method for testing free radicals in solid-phase reactions. Finally, a possible activation mechanism and hexachlorobenzene degradation pathway were proposed. This study successfully presents a mild degradation method in the field of hexachlorobenzene contaminated site remediation.
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Affiliation(s)
- Guoxuan Fan
- State Key Laboratory of Water Environment Simulation, School of Environment, Beijing Normal University, Beijing 100875, China
| | - Xitao Liu
- State Key Laboratory of Water Environment Simulation, School of Environment, Beijing Normal University, Beijing 100875, China.
| | - Xiaowan Li
- State Key Laboratory of Water Environment Simulation, School of Environment, Beijing Normal University, Beijing 100875, China
| | - Chunye Lin
- State Key Laboratory of Water Environment Simulation, School of Environment, Beijing Normal University, Beijing 100875, China
| | - Mengchang He
- State Key Laboratory of Water Environment Simulation, School of Environment, Beijing Normal University, Beijing 100875, China
| | - Wei Ouyang
- State Key Laboratory of Water Environment Simulation, School of Environment, Beijing Normal University, Beijing 100875, China
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19
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Hydrodechlorination of Different Chloroaromatic Compounds at Room Temperature and Ambient Pressure—Differences in Reactivity of Cu- and Ni-Based Al Alloys in an Alkaline Aqueous Solution. Catalysts 2020. [DOI: 10.3390/catal10090994] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
Abstract
It is well known that the hydrodechlorination (HDC) of chlorinated aromatic contaminants in aqueous effluents enables a significant increase in biodegradability. HDC consumes a low quantity of reactants producing corresponding non-chlorinated and much more biodegradable organic compounds. Two commonly used precious metals free Al alloys (Raney Al-Ni and Devarda’s Al-Cu-Zn) were compared in reductive action in an alkaline aqueous solution. Raney Al-Ni alloy was examined as a universal and extremely effective HDC agent in a diluted aqueous NaOH solution. The robustness of Raney Al-Ni activity is illustrated in the case of HDC of polychlorinated aromatic compounds mixture in actual waste water. In contrast, Devarda’s Al-Cu-Zn alloy was approved as much less active for HDC of the tested chlorinated aromatic compounds, but with a surprisingly high selectivity on cleavage of C-Cl bonds in the meta and sometimes the ortho position in chlorinated aniline and sometimes chlorinated phenol structures. The reaction of both tested alloys with chlorinated aromatic compounds in the aqueous NaOH solution is accompanied by dissolution of aluminum. Dissolved Al in the alkaline HDC reaction mixture is very useful for subsequent treatment of HDC products by coagulation and flocculation of Al(OH)3 caused by simple neutralization of the alkaline aqueous phase after the HDC reaction.
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20
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Tso CP, Kuo DTF, Shih YH. Removal of hexabromocyclododecane by carboxymethyl cellulose stabilized Fe and Ni/Fe bimetallic nanoparticles: The particle stability and reactivity in water. CHEMOSPHERE 2020; 250:126155. [PMID: 32105853 DOI: 10.1016/j.chemosphere.2020.126155] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/02/2019] [Revised: 01/26/2020] [Accepted: 02/06/2020] [Indexed: 06/10/2023]
Abstract
Aggregation of nanoparticles (NPs) can hinder the degradative reactivity of particles towards organic pollutants as it reduces available surface area for reaction. This limitation may be circumvented by applying dispersant to improve colloidal stability of nanoparticle suspension. This study examined the removal of hexabromocyclododecane (HBCD), a recently listed persistent organic pollutant, by carboxymethylcellulose (CMC) stabilized nanoscale zerovalent iron (CMC-NZVI) and bimetallic Ni/Fe nanoparticles (CMC-Ni/Fe) under the influence of suspension chemistry. The mass-normalized removal rate constants of HBCD by CMC-Ni/Fe NPs increased with lower particle aggregation. However, the coating could introduce diffusion resistance as HBCD diffused through the CMC layer to the Fe surface. The activation energy was estimated to be 26.8 kJ mol-1, indicating the overall reaction process was neither surface-limited nor diffusion-controlled. The reactivity of CMC-Ni/Fe NPs toward HBCD was not affected by aqueous initial pH substantially. Common monoanions (Cl-, NO3-, and HCO3-) generally enhanced HBCD adsorption but diminished its debromination. The removal rate did not differ significantly among the studied monoanions over a concentration of 2.5-10 mM except HCO3-. Overall, CMC coating can stabilize Ni/Fe NPs, increase their adsorption of HBCD, provide buffer pH capacity, and overcome common inhibition effects of anions in water. These findings suggested the high potential of using CMC-Ni/Fe NPs for in-situ remediation.
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Affiliation(s)
- Chih-Ping Tso
- Department of Agricultural Chemistry, National Taiwan University, No. 1, Sec. 4, Roosevelt Road, Taipei, 106, Taiwan
| | - Dave Ta Fu Kuo
- Department of Architecture and Civil Engineering, City University of Hong Kong, Hong Kong
| | - Yang-Hsin Shih
- Department of Agricultural Chemistry, National Taiwan University, No. 1, Sec. 4, Roosevelt Road, Taipei, 106, Taiwan.
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21
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Zheng H, Ren X, Zhang X, Song G, Chen D, Chen C. Mutual effect of U(VI) and phosphate on the reactivity of nanoscale zero-valent iron (nZVI) for their co-removal. J Mol Liq 2020. [DOI: 10.1016/j.molliq.2019.111853] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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22
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Midik Ertosun F, Cellat K, Eren O, Gül Ş, Kuşvuran E, Şen F. Comparison of nanoscale zero-valent iron, fenton, and photo-fenton processes for degradation of pesticide 2,4-dichlorophenoxyacetic acid in aqueous solution. SN APPLIED SCIENCES 2019. [DOI: 10.1007/s42452-019-1554-5] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023] Open
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23
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Carvalho de Almeida C, Muñoz-Morales M, Sáez C, Cañizares P, Martínez-Huitle CA, Rodrigo MA. Electrolysis with diamond anodes of the effluents of a combined soil washing - ZVI dechlorination process. JOURNAL OF HAZARDOUS MATERIALS 2019; 369:577-583. [PMID: 30818122 DOI: 10.1016/j.jhazmat.2019.02.048] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/14/2018] [Revised: 02/09/2019] [Accepted: 02/13/2019] [Indexed: 06/09/2023]
Abstract
In this work, a new soil washing process in which Soil-Liquid extraction technology is enhanced by adding iron particles (zero valent iron nanoparticles or granules) was investigated to remove clopyralid from spiked soils. This novel approach can be efficiently used to extract chlorinated hydrocarbons from soil and aims to obtain soil-washing wastes with low content of hazardous chlorinated species. The iron particles used were subsequently removed from the treated soil using magnetic fields. Then, the complete mineralization of the produced soil washing effluents was successfully achieved by applying anodic oxidation with diamond anodes in an electrochemical flow cell. Results demonstrated that, opposite to what it was initially expected, no improvements in the efficiency of the electrochemical process were observed by adding iron particles during the soil washing. This behavior is explained in terms of the lower electrochemical reactivity of the dechlorinated derivatives produced. Although results are not as promising as initially expected, it does not mean a completely negative outcome for the use of ZVI during washing, because the hazardousness of the pollutants is rapidly decreased in the initial stages of the soil-washing, opening the possibility for the combination of this technology with other processes, such as biological treatment.
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Affiliation(s)
- C Carvalho de Almeida
- Institute of Chemistry, Federal University of Rio Grande do Norte, Campus Universitario, 59078-970, Natal, Brazil
| | - M Muñoz-Morales
- Department of Chemical Engineering, Faculty of Chemical Sciences and Technologies, University of Castilla-La Mancha, Campus Universitario s/n, 13071 Ciudad Real, Spain
| | - C Sáez
- Department of Chemical Engineering, Faculty of Chemical Sciences and Technologies, University of Castilla-La Mancha, Campus Universitario s/n, 13071 Ciudad Real, Spain
| | - P Cañizares
- Department of Chemical Engineering, Faculty of Chemical Sciences and Technologies, University of Castilla-La Mancha, Campus Universitario s/n, 13071 Ciudad Real, Spain
| | - C A Martínez-Huitle
- Institute of Chemistry, Federal University of Rio Grande do Norte, Campus Universitario, 59078-970, Natal, Brazil
| | - M A Rodrigo
- Department of Chemical Engineering, Faculty of Chemical Sciences and Technologies, University of Castilla-La Mancha, Campus Universitario s/n, 13071 Ciudad Real, Spain.
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Garbou AM, Liu M, Zou S, Yestrebsky CL. Degradation kinetics of hexachlorobenzene over zero-valent magnesium/graphite in protic solvent system and modeling of degradation pathways using density functional theory. CHEMOSPHERE 2019; 222:195-204. [PMID: 30708153 DOI: 10.1016/j.chemosphere.2019.01.134] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/23/2018] [Revised: 12/23/2018] [Accepted: 01/23/2019] [Indexed: 06/09/2023]
Abstract
Hexachlorobenzene (HCB), like many chlorinated organic compounds, has accumulated in the environment from agricultural and industrial activity. Because of its health risks and adverse impact on various ecosystems, remediation of this contaminant is of vital concern. The objective of this study is to evaluate the proficiency of activated magnesium metal in a protic solvent system to accomplish reductive dechlorination of HCB. Experimental results were compared with those predicted by quantum chemical calculations based on Density Functional Theory (DFT). Multivariate analysis detected complete degradation of HCB within 30 min at room temperature, the reaction having a rate constant of 0.222 min-1. Dechlorination was hypothesized to proceed via an ionic mechanism; the main dechlorination pathways of HCB in 1:1 ethanol:ethyl lactate were HCB → PCBz → 1,2,4,5-TCB; 1,2,3,5-TCB → 1,2,4-TriCB; 1,3,5-TriCB → 1,4-DiCB; 1,3-DiCB. The direct relationship between the decreasing number of Cl substituents and dechlorination reaction kinetics agrees with the ΔG values predicted by the computational model. This methodology shows promise for the development of a practical and sustainable field application for the remediation of other chlorinated aromatic compounds.
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Affiliation(s)
- Amel M Garbou
- Environmental Chemistry Laboratory, University of Central Florida, 4000 Central Florida Blvd., Orlando, FL 32816, United States
| | - Muqiong Liu
- Department of Chemistry, University of Central Florida, 4000 Central Florida Blvd., Orlando, FL 32816, United States
| | - Shengli Zou
- Department of Chemistry, University of Central Florida, 4000 Central Florida Blvd., Orlando, FL 32816, United States
| | - Cherie L Yestrebsky
- Environmental Chemistry Laboratory, University of Central Florida, 4000 Central Florida Blvd., Orlando, FL 32816, United States.
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25
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Amoxicillin degradation using green synthesized iron oxide nanoparticles: Kinetics and mechanism analysis. ACTA ACUST UNITED AC 2019. [DOI: 10.1016/j.enmm.2019.100219] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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26
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Sun Y, Liu Z, Fei Z, Li C, Chun Y, Zhang A. Synergistic effect and degradation mechanism on Fe-Ni/CNTs for removal of 2,4-dichlorophenol in aqueous solution. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2019; 26:8768-8778. [PMID: 30712207 DOI: 10.1007/s11356-019-04394-w] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/19/2018] [Accepted: 01/25/2019] [Indexed: 06/09/2023]
Abstract
Fe-Ni bimetallic nanoparticles supported on CNTs (Fe-Ni/CNTs) were synthesized, characterized, and applied for removal of 2,4-dichlorophenol (2,4-DCP) in aqueous solution. The removal performance was enhanced drastically on Fe-Ni/CNTs with respect to monometallic Fe/CNTs. The synergistic effect between Fe-Ni nanoparticles and CNTs has been studied in detail. The research results indicated that the doping of Ni played an important role in promoting the catalytic degradation of 2,4-DCP. And the presence of CNTs not only could effectively reduce the aggregation of nanoparticles but also facilitate the mass transfer of 2,4-DCP and the formation of active atomic hydrogen during the catalytic process. In addition, the removal kinetics of 2,4-DCP by Fe-Ni/CNTs were in agreement with a pseudo-first-order model, and the rate constants were dependent on a number of factors including the initial concentration of 2,4-DCP, the dosage of Fe-Ni/CNTs, pH value of the solution, and doping amount of Ni. The degradation mechanism involved the adsorption by CNTs and catalytic reduction by Fe under the stimulating of Ni, and the preferred dechlorination followed the order of para-Cl > ortho-Cl. The study confirmed that Fe-Ni/CNTs had a potential to be a promising catalytic material for removal of chlorophenol and had a great prospect for practical application.
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Affiliation(s)
- Yufeng Sun
- Key Laboratory of Mesoscopic Chemistry of MOE, School of Chemistry and Chemical Engineering, Nanjing University, Nanjing, 210023, People's Republic of China
- School of Chemistry and Environmental Engineering, Yancheng Teachers University, Yancheng, 224002, People's Republic of China
| | - Zongtang Liu
- School of Chemistry and Environmental Engineering, Yancheng Teachers University, Yancheng, 224002, People's Republic of China
| | - Zhenghao Fei
- School of Chemistry and Environmental Engineering, Yancheng Teachers University, Yancheng, 224002, People's Republic of China
| | - Changshun Li
- Key Laboratory of Mesoscopic Chemistry of MOE, School of Chemistry and Chemical Engineering, Nanjing University, Nanjing, 210023, People's Republic of China
| | - Yuan Chun
- Key Laboratory of Mesoscopic Chemistry of MOE, School of Chemistry and Chemical Engineering, Nanjing University, Nanjing, 210023, People's Republic of China
| | - Aimin Zhang
- Key Laboratory of Mesoscopic Chemistry of MOE, School of Chemistry and Chemical Engineering, Nanjing University, Nanjing, 210023, People's Republic of China.
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27
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Improvements of Pd/Fe nanoparticles by ethylenediamine disuccinic acid for 2,4-D dechlorination. Sep Purif Technol 2018. [DOI: 10.1016/j.seppur.2018.06.061] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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28
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Bae S, Collins RN, Waite TD, Hanna K. Advances in Surface Passivation of Nanoscale Zerovalent Iron: A Critical Review. ENVIRONMENTAL SCIENCE & TECHNOLOGY 2018; 52:12010-12025. [PMID: 30277777 DOI: 10.1021/acs.est.8b01734] [Citation(s) in RCA: 144] [Impact Index Per Article: 24.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
Nanoscale zerovalent iron (NZVI) is one of the most extensively studied nanomaterials in the fields of wastewater treatment and remediation of soil and groundwater. However, rapid oxidative transformations of NZVI can result in reduced NZVI reactivity. Indeed, the surface passivation of NZVI is considered one of the most challenging aspects in successfully applying NZVI to contaminant degradation. The oxidation of NZVI can lead to the formation of FeII-bearing phases (e.g., FeIIO, FeII(OH)2, FeIIFeIII2O4) on the NZVI surface or complete oxidation to ferric (oxyhydr)oxides (e.g., FeIIIOOH). This corrosion phenomenon is dependent upon various factors including the composition of NZVI itself, the type and concentration of aqueous species, reaction time and oxic/anoxic environments. As such, the coexistence of different Fe oxidation states on NZVI surfaces may also, in some instances, provide a unique reactive microenvironment to promote the adsorption of contaminants and their subsequent transformation via redox reactions. Thus, an understanding of passivation chemistry, and its related mechanisms, is essential not only for effective NZVI application but also for accurately assessing the positive and negative effects of NZVI surface passivation. The aim of this review is to discuss the nature of the passivation processes that occur and the passivation byproducts that form in various environments. In particular, the review presents: (i) the strengths and limitations of state-of-the-art techniques (e.g., electron microscopies and X-ray-based spectroscopies) to identify passivation byproducts; (ii) the passivation mechanisms proposed to occur in anoxic and oxic environments; and (iii) the effects arising from synthesis procedures and the presence of inorganics/organics on the nature of the passivation byproducts that form. In addition, several depassivation strategies that may assist in increasing and/or maintaining the reactivity of NZVI are considered, thereby enhancing the effectiveness of NZVI in contaminant degradation.
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Affiliation(s)
- Sungjun Bae
- Department of Civil and Environmental Engineering , Konkuk University , 120 Neungdong-ro, Gwangjin-gu , Seoul 05029 , Republic of Korea
| | - Richard N Collins
- School of Civil and Environmental Engineering , University of New South Wales , Sydney , New South Wales 2052 , Australia
| | - T David Waite
- School of Civil and Environmental Engineering , University of New South Wales , Sydney , New South Wales 2052 , Australia
| | - Khalil Hanna
- Univ Rennes, Ecole Nationale Supérieure de Chimie de Rennes , CNRS, ISCR-UMR6226, F-35000 Rennes , France
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29
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Ourique MF, Sousa PVF, Oliveira AF, Lopes RP. Comparative study of the direct black removal by Fe, Cu, and Fe/Cu nanoparticles. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2018; 25:28928-28941. [PMID: 30109676 DOI: 10.1007/s11356-018-2842-0] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/08/2018] [Accepted: 07/23/2018] [Indexed: 06/08/2023]
Abstract
In this study, direct black dye removal was investigated using iron nanoparticles (Fe NPs), copper (Cu NPs), and Fe/Cu (Fe/Cu NPs). NPs were characterized by transmission electron microscopy (TEM) and X-ray diffraction (XRD). Using a dose of 0.25 g L-1 of Fe, Cu, and Fe/Cu NPs, a degradation efficiency of 13, 26, and 43% respectively was obtained. For the 1.00 g L-1 dose, the efficiency increased to 100, 43, and 100%, respectively. Studies in anoxic and oxic conditions presented degradation rates, respectively, of 100 and 30% for Fe NPs, 90 and 50% for Fe/Cu NPs, and 40% in both reactions for Cu NPs, indicating that the mechanism of dye degradation by NPs is predominantly reducing under the conditions studied. The addition of EDTA decreased the dye removal rate for Fe, Cu, and Fe/Cu NPs at 27, 10, and 35%, respectively. In addition to the degradation, the adsorption phenomena of the by-products formed during the reaction were confirmed by the Fourier transform infrared (FTIR) analysis and verified by the desorption tests. Fe and Fe/Cu NPs showed the highest efficiency in direct black dye reductive degradation and adsorption of by-products, removing 100% of the dye at a dose of 1 g L-1 within 10 min of reaction. Graphical abstracts ᅟ.
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Affiliation(s)
- Mariane F Ourique
- Chemistry Department, Federal University of Viçosa, Viçosa, MG, 36570-000, Brazil
| | - Paloma V F Sousa
- Chemistry Department, Federal University of Viçosa, Viçosa, MG, 36570-000, Brazil
| | - André F Oliveira
- Chemistry Department, Federal University of Viçosa, Viçosa, MG, 36570-000, Brazil
| | - Renata P Lopes
- Chemistry Department, Federal University of Viçosa, Viçosa, MG, 36570-000, Brazil.
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30
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Jin X, Li Q, Yang Q. The reactivity of Fe/Ni colloid stabilized by carboxymethylcellulose (CMC-Fe/Ni) toward chloroform. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2018; 25:21049-21057. [PMID: 29767309 DOI: 10.1007/s11356-018-2030-2] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/02/2018] [Accepted: 04/13/2018] [Indexed: 06/08/2023]
Abstract
The use of stabilizers can prevent the reactivity loss of nanoparticles due to aggregation. In this study, carboxymethylcellulose (CMC) was selected as the stabilizer to synthesize a highly stable CMC-stabilized Fe/Ni colloid (CMC-Fe/Ni) via pre-aggregation stabilization. The reactivity of CMC-Fe/Ni was evaluated via the reaction of chloroform (CF) degradation. The effect of background solution which composition was affected by the preparation of Fe/Ni (Fe/Ni precursors, NaBH4 dosage) and the addition of solute (common ions, sulfur compounds) on the reactivity of CMC-Fe/Ni was also investigated. Additionally, the dried CMC-Fe/Ni was used for characterization in terms of scanning electron microscopy (SEM) and X-ray photoelectron spectroscopy (XPS). The experimental results indicated that CMC stabilization greatly improved the reactivity of Fe/Ni bimetal and CF (10 mg/L) could be completely degraded by CMC-Fe/Ni (0.1 g/L) within 45 min. The use of different Fe/Ni precursors resulting in the variations of background solution seemed to have no obvious influence on the reactivity of CMC-Fe/Ni, whereas the dosage of NaBH4 in background solution showed a negative correlation with the reactivity of CMC-Fe/Ni. Besides, the individual addition of external solutes into background solution all had an adverse effect on the reactivity of CMC-Fe/Ni, of which the poisoning effect of sulfides (Na2S, Na2S2O4) was significant than common ions and sulfite.
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Affiliation(s)
- Xin Jin
- Beijing Key Laboratory of Water Resources & Environmental Engineering, China University of Geosciences (Beijing), Beijing, 100083, People's Republic of China
| | - Qun Li
- Beijing Key Laboratory of Water Resources & Environmental Engineering, China University of Geosciences (Beijing), Beijing, 100083, People's Republic of China
| | - Qi Yang
- Beijing Key Laboratory of Water Resources & Environmental Engineering, China University of Geosciences (Beijing), Beijing, 100083, People's Republic of China.
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31
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Jiang Y, Shang Y, Yu S, Liu J. Dechlorination of Hexachlorobenzene in Contaminated Soils Using a Nanometallic Al/CaO Dispersion Mixture: Optimization through Response Surface Methodology. INTERNATIONAL JOURNAL OF ENVIRONMENTAL RESEARCH AND PUBLIC HEALTH 2018; 15:ijerph15050872. [PMID: 29702570 PMCID: PMC5981911 DOI: 10.3390/ijerph15050872] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 03/29/2018] [Revised: 04/18/2018] [Accepted: 04/18/2018] [Indexed: 11/27/2022]
Abstract
Hexachlorobenzene (HCB) contamination of soils remains a significant environmental challenge all over the world. Reductive stabilization is a developing technology that can decompose the HCB with a dechlorination process. A nanometallic Al/CaO (n-Al/CaO) dispersion mixture was developed utilizing ball-milling technology in this study. The dechlorination efficiency of HCB in contaminated soils by the n-Al/CaO grinding treatment was evaluated. Response surface methodology (RSM) was employed to investigate the effects of three variables (soil moisture content, n-Al/CaO dosage and grinding time) and the interactions between these variables under the Box-Behnken Design (BBD). A high regression coefficient value (R2 = 0.9807) and low p value (<0.0001) of the quadratic model indicated that the model was accurate in predicting the experimental results. The optimal soil moisture content, n-Al/CaO dosage, and grinding time were found to be 7% (m/m), 17.7% (m/m), and 24 h, respectively, in the experimental ranges and levels. Under optimal conditions, the dechlorination efficiency was 80%. The intermediate product analysis indicated that dechlorination was the process by stepwise loss of chloride atoms. The main pathway observed within 24 h was HCB → pentachlorobenzene (PeCB) → 1,2,3,4-tetrachlorobenzene (TeCB) and 1,2,4,5-TeCB. The results indicated that the moderate soil moisture content was crucial for the hydrodechlorination of HCB. A probable mechanism was proposed wherein water acted like a hydrogen donor and promoted the hydrodechlorination process. The potential application of n-Al/CaO is an environmentally-friendly and cost-effective option for decontamination of HCB-contaminated soils.
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Affiliation(s)
- Yuhui Jiang
- Key Laboratory for Solid Waste Management and Environment Safety (Tsinghua University), Ministry of Education of China, Tsinghua University, Beijing 100084, China.
| | - Yixuan Shang
- Key Laboratory for Solid Waste Management and Environment Safety (Tsinghua University), Ministry of Education of China, Tsinghua University, Beijing 100084, China.
| | - Shuyao Yu
- Key Laboratory for Solid Waste Management and Environment Safety (Tsinghua University), Ministry of Education of China, Tsinghua University, Beijing 100084, China.
| | - Jianguo Liu
- Key Laboratory for Solid Waste Management and Environment Safety (Tsinghua University), Ministry of Education of China, Tsinghua University, Beijing 100084, China.
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32
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Tso CP, Shih YH. Effect of carboxylic acids on the properties of zerovalent iron toward adsorption and degradation of trichloroethylene. JOURNAL OF ENVIRONMENTAL MANAGEMENT 2018; 206:817-825. [PMID: 29197807 DOI: 10.1016/j.jenvman.2017.11.070] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/13/2017] [Revised: 11/01/2017] [Accepted: 11/26/2017] [Indexed: 06/07/2023]
Abstract
Zerovalent iron (ZVI) based technology has been applied to remediate contaminated groundwater and has been paid great attention as an economic alternative. But it is still remains highly challenging to remove chlorinated pollutants such as trichloroethylene (TCE) with ZVI. Low molecular weight carboxylic ligands (formic acid (FA), oxalic acid (OA), and citric acid (CA)) were chosen to study the influence on the performance of ZVI in groundwater, including the morphology of Fe surface and the Fe dissolution. The removal rate of TCE with ZVI in the presence of 30 mM carboxylic groups followed an order of FA > OA > pure water ≅ CA. FA provides protons to promote the surface corrosion and generated more magnetite on the ZVI surface, which was further responsible for a high adsorption of TCE. With the strong complexing ability of OA and CA, passive layers could form dissoluble complexes via a ligand-promoted dissolution process. However, high concentration of OA resulted in Fe oxalate reprecipitated back onto the ZVI surface then inhibited the reactivity of ZVI. The Fe-ligand complexes also have ability to transform TCE depending on their redox properties. It is expected that effectiveness of carboxylic ligands on the ZVI: those low molecular weight carboxylic ligands in groundwater and soil may enhance the reaction efficiency of ZVI by altering the surface characteristics of ZVI. Therefore, the carboxylic ligands could increase the reactivity and the longevity of ZVI.
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Affiliation(s)
- Chih-Ping Tso
- Department of Agricultural Chemistry, National Taiwan University, No. 1, Roosevelt Road Sec. 4, Taipei 106, Taiwan, ROC.
| | - Yang-Hsin Shih
- Department of Agricultural Chemistry, National Taiwan University, No. 1, Roosevelt Road Sec. 4, Taipei 106, Taiwan, ROC.
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33
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Wang Y, Liu L, Fang G, Wang L, Kengara FO, Zhu C. The mechanism of 2-chlorobiphenyl oxidative degradation by nanoscale zero-valent iron in the presence of dissolved oxygen. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2018; 25:2265-2272. [PMID: 29119491 DOI: 10.1007/s11356-017-0614-x] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/16/2017] [Accepted: 10/24/2017] [Indexed: 06/07/2023]
Abstract
It has recently been demonstrated that the addition of nanoscale zero-valent iron (nZVI) to oxygen-containing water or soil aquifers results in the oxidation of organic compounds. However, there has been little insight about the generation of the reactive oxygen species (ROS) that play a vital role in the transformation of contaminants in the presence of nZVI. This study investigated (i) the degradation of 2-chlorobiphenyl (2-CB) by nZVI; (ii) the generation and role of ROS in this process. Under anaerobic and aerobic conditions, the removal efficiency of 2-CB was 65.5 and 59.4%, respectively, after 4 h at a pH of 5.0. The results demonstrated that both the reductive and oxidative processes account for 2-CB degradation under aerobic conditions. Hydroxyl radicals (·OH) generated by nZVI at low pH could efficiently degrade 2-CB, the main reductive dechlorination product was biphenyl. Two other hydroxylation products (2-chlorophenol and 2-hydroxybiphenyl) were also examined. There was a higher degradation efficiency of 2-CB under acidic conditions than basic conditions because more ·OH was generated by nZVI. The presence of natural organic matters (NOMs), including humic acid (HA), salicylic acid (SA), galic acid (GA), and tannic acid (TA), increased the degradation efficiency of 2-CB (k values ranged from 0.0041 to 0.0042 min-1), because NOMs can mediate the electron transfer from the nZVI surface to O2, and facilitate the production of Fe2+ and H2O2 that subsequently form ·OH. The mechanisms of these processes have provided new insights into the role of nZVI in the transformation of organic compounds.
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Affiliation(s)
- Yu Wang
- State Key Laboratory of Soil and Sustainable Agriculture, Institute of Soil Science, Chinese Academy of Sciences, Nanjing, 210008, China
| | - Linhao Liu
- State Key Laboratory of Soil and Sustainable Agriculture, Institute of Soil Science, Chinese Academy of Sciences, Nanjing, 210008, China
| | - Guodong Fang
- Key Laboratory of Soil Environment and Pollution Remediation, Institute of Soil Science, Chinese Academy of Sciences, Nanjing, 210008, China.
| | - Lei Wang
- Nanjing Institute of Environmental Sciences, Ministry of Environmental Protection, Nanjing, 210042, China.
- Organic Food Development Center, Ministry of Environmental Protection, Nanjing, 210042, China.
| | | | - Changyin Zhu
- Key Laboratory of Soil Environment and Pollution Remediation, Institute of Soil Science, Chinese Academy of Sciences, Nanjing, 210008, China
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34
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Application of Fe-Cu/Biochar System for Chlorobenzene Remediation of Groundwater in Inhomogeneous Aquifers. WATER 2017. [DOI: 10.3390/w10010013] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Abstract
Chlorobenzene (CB), as a typical Volatile Organic Contaminants (VOC), is toxic, highly persistent and easily migrates in water, posing a significant risk to human health and subsurface ecosystems. Therefore, exploring effective approaches to remediate groundwater contaminated by CB is essential. As an enhanced micro-electrolysis system for CB-contaminated groundwater remediation, this study attempted to couple the iron-copper bimetal with biochar. Two series of columns using sands with different grain diameters were used, consisting of iron, copper and biochar fillings as the permeable reactive barriers (PRBs), to simulate the remediation of CB-contaminated groundwater in homogeneous and heterogeneous aquifers. Regardless of the presence of homogeneous or heterogeneous porous media, the CB concentrations in the effluent from the PRB columns were significantly lower than the natural sandy columns, suggesting that the iron and copper powders coupled with biochar particles could have a significant removal effect compared to the natural sand porous media in the first columns. CB was transported relatively quickly in the heterogeneous porous media, likely due to the fact that the contaminant residence time is proportional to the infiltration velocities in the different types of porous media. The average effluent CB concentrations from the heterogeneous porous media were lower than those from homogeneous porous media. The heterogeneity retarded the vertical infiltration of CB, leading to its extended lateral distribution. During the treatment process, benzene and phenol were observed as the products of CB degradation. The ultimate CB removal efficiency was 61.4% and 68.1%, demonstrating that the simulated PRB system with the mixture of iron, copper and biochar was effective at removing CB from homogeneous and heterogeneous aquifers.
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35
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Simultaneous determination of cadmium, lead and mercury ions at trace level by magnetic solid phase extraction with Fe@Ag@Dimercaptobenzene coupled to high performance liquid chromatography. Talanta 2017; 175:194-199. [DOI: 10.1016/j.talanta.2017.07.043] [Citation(s) in RCA: 58] [Impact Index Per Article: 8.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/28/2017] [Revised: 07/10/2017] [Accepted: 07/13/2017] [Indexed: 11/20/2022]
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36
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Mahdavi R, Ashraf Talesh SS. The effect of ultrasonic irradiation on the structure, morphology and photocatalytic performance of ZnO nanoparticles by sol-gel method. ULTRASONICS SONOCHEMISTRY 2017; 39:504-510. [PMID: 28732974 DOI: 10.1016/j.ultsonch.2017.05.012] [Citation(s) in RCA: 28] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/07/2017] [Revised: 05/07/2017] [Accepted: 05/08/2017] [Indexed: 06/07/2023]
Abstract
In this research, the effect of ultrasonic irradiation power (0, 75, 150 and 200W) and time (0, 5, 15 and 20min) on the structure, morphology and photocatalytic activity of zinc oxide nanoparticles synthesized by sol-gel method was investigated. Crystallographic structures and the morphologies of the resultant powders were determined by X-ray diffraction (XRD) and transmission electron microscopy (TEM). The XRD patterns showed that ZnO samples were crystallized in their pure phase. The purity of samples was increased by increasing the ultrasonic irradiation power and time. Not only did ultrasonic irradiation unify both the structure and the morphology, but also it reduced the size and prohibited particles from aggregation. The optical behavior of the samples was studied by UV-vis spectroscopy. Photocatalytic activity of particles was measured by degradation of methyl orange under radiation of ultraviolet light. Ultrasound nanoparticles represented higher degradation compared to non-ultrasound ones.
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Affiliation(s)
- Reza Mahdavi
- Department of Chemical Engineering, Faculty of Engineering, University of Guilan, Rasht, Iran
| | - S Siamak Ashraf Talesh
- Department of Chemical Engineering, Faculty of Engineering, University of Guilan, Rasht, Iran.
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37
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Rodrigues R, Betelu S, Colombano S, Masselot G, Tzedakis T, Ignatiadis I. Reductive Dechlorination of Hexachlorobutadiene by a Pd/Fe Microparticle Suspension in Dissolved Lactic Acid Polymers: Degradation Mechanism and Kinetics. Ind Eng Chem Res 2017. [DOI: 10.1021/acs.iecr.7b03012] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Romain Rodrigues
- BRGM (French Geological Survey), 3 avenue Claude Guillemin, 45060 Orléans Cedex 2, France
- ADEME (French Environment and Energy Management Agency), 20 avenue du Grésillé, 49000 Angers Cedex 1, France
- LGC (Chemical Engineering Laboratory), 118 route de Narbonne, 31062 Toulouse Cedex 9, France
| | - Stéphanie Betelu
- BRGM (French Geological Survey), 3 avenue Claude Guillemin, 45060 Orléans Cedex 2, France
| | - Stéfan Colombano
- BRGM (French Geological Survey), 3 avenue Claude Guillemin, 45060 Orléans Cedex 2, France
| | - Guillaume Masselot
- ADEME (French Environment and Energy Management Agency), 20 avenue du Grésillé, 49000 Angers Cedex 1, France
| | - Theodore Tzedakis
- LGC (Chemical Engineering Laboratory), 118 route de Narbonne, 31062 Toulouse Cedex 9, France
| | - Ioannis Ignatiadis
- BRGM (French Geological Survey), 3 avenue Claude Guillemin, 45060 Orléans Cedex 2, France
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38
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Silveira JE, Barreto-Rodrigues M, Cardoso TO, Pliego G, Munoz M, Zazo JA, Casas JA. Nanoscale Fe/Ag particles activated persulfate: optimization using response surface methodology. WATER SCIENCE AND TECHNOLOGY : A JOURNAL OF THE INTERNATIONAL ASSOCIATION ON WATER POLLUTION RESEARCH 2017; 75:2216-2224. [PMID: 28498134 DOI: 10.2166/wst.2017.063] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
This work studied the bimetallic nanoparticles Fe-Ag (nZVI-Ag) activated persulfate (PS) in aqueous solution using response surface methodology. The Box-Behnken design (BBD) was employed to optimize three parameters (nZVI-Ag dose, reaction temperature, and PS concentration) using 4-chlorophenol (4-CP) as the target pollutant. The synthesis of nZVI-Ag particles was carried out through a reduction of FeCl2 with NaBH4 followed by reductive deposition of Ag. The catalyst was characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM) and Brunauer-Emmett-Teller (BET) surface area. The BBD was considered a satisfactory model to optimize the process. Confirmatory tests were carried out using predicted and experimental values under the optimal conditions (50 mg L-1 nZVI-Ag, 21 mM PS at 57 °C) and the complete removal of 4-CP achieved experimentally was successfully predicted by the model, whereas the mineralization degree predicted (90%) was slightly overestimated against the measured data (83%).
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Affiliation(s)
- Jefferson E Silveira
- Chemical Engineering, Autonomous University of Madrid, Cantoblanco, 28049 Madrid, Spain E-mail:
| | - Marcio Barreto-Rodrigues
- Department of Chemistry, Postgraduate Programme in Technology of Chemical and Biochemical Processes, Federal Technological University of Paraná, Pato Branco, PR, Brazil
| | - Tais O Cardoso
- Chemical Engineering, Autonomous University of Madrid, Cantoblanco, 28049 Madrid, Spain E-mail:
| | - Gema Pliego
- Chemical Engineering, Autonomous University of Madrid, Cantoblanco, 28049 Madrid, Spain E-mail:
| | - Macarena Munoz
- Chemical Engineering, Autonomous University of Madrid, Cantoblanco, 28049 Madrid, Spain E-mail:
| | - Juan A Zazo
- Chemical Engineering, Autonomous University of Madrid, Cantoblanco, 28049 Madrid, Spain E-mail:
| | - José A Casas
- Chemical Engineering, Autonomous University of Madrid, Cantoblanco, 28049 Madrid, Spain E-mail:
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39
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Shan C, Wang X, Guan X, Liu F, Zhang W, Pan B. Efficient Removal of Trace Se(VI) by Millimeter-Sized Nanocomposite of Zerovalent Iron Confined in Polymeric Anion Exchanger. Ind Eng Chem Res 2017. [DOI: 10.1021/acs.iecr.7b00507] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Chao Shan
- State
Key Laboratory of Pollution Control and Resource Reuse, School of
the Environment, Nanjing University, Nanjing 210023, China
- Research
Center for Environmental Nanotechnology (ReCENT), Nanjing University, Nanjing 210023, China
| | - Xing Wang
- State
Key Laboratory of Pollution Control and Resource Reuse, School of
the Environment, Nanjing University, Nanjing 210023, China
| | - Xiaohong Guan
- State
Key Laboratory of Pollution Control and Resources Reuse, College of
Environmental Science and Engineering, Tongji University, Shanghai 200092, China
| | - Fei Liu
- State
Key Laboratory of Pollution Control and Resource Reuse, School of
the Environment, Nanjing University, Nanjing 210023, China
| | - Weiming Zhang
- State
Key Laboratory of Pollution Control and Resource Reuse, School of
the Environment, Nanjing University, Nanjing 210023, China
- Research
Center for Environmental Nanotechnology (ReCENT), Nanjing University, Nanjing 210023, China
| | - Bingcai Pan
- State
Key Laboratory of Pollution Control and Resource Reuse, School of
the Environment, Nanjing University, Nanjing 210023, China
- Research
Center for Environmental Nanotechnology (ReCENT), Nanjing University, Nanjing 210023, China
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40
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Ji Q, Li J, Xiong Z, Lai B. Enhanced reactivity of microscale Fe/Cu bimetallic particles (mFe/Cu) with persulfate (PS) for p-nitrophenol (PNP) removal in aqueous solution. CHEMOSPHERE 2017; 172:10-20. [PMID: 28061341 DOI: 10.1016/j.chemosphere.2016.12.128] [Citation(s) in RCA: 31] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/15/2016] [Revised: 09/23/2016] [Accepted: 12/26/2016] [Indexed: 06/06/2023]
Abstract
In this study, batch experiments were conducted to examine the enhanced reactivity of microscale Fe/Cu bimetallic particles (mFe/Cu) with persulfate (PS) for p-nitrophenol (PNP) removal in aqueous solution. The key operating parameters (i.e., theoretical Cu mass loadings (TMLCu), mFe/Cu dosage, PS dose, initial pH and temperature) were optimized by the batch experiments, respectively. The experimental data were followed well the pseudo-first-order kinetic model. Result reveals that refractory PNP (500 mg L-1) was effectively degraded by mFe/Cu-PS system with removal of 98.4% and kobs of 1.91 min-1 after only 3 min treatment under the optimal operating conditions. Moreover, compared with control experiments (i.e., mFe/Cu, microscale Fe0 with PS (mFe0-PS), and PS alone), mFe/Cu-PS system exerted better performance for PNP removal due to the strong synergistic effect between PS and mFe/Cu. According to the analysis results of degradation kinetics of PNP, COD (chemical oxygen demand) removal, UV-vis absorption spectra and the intermediates formed, the results reveal that the PNP removal by mFe/Cu-PS system was mainly attributed to reduction accompanied slight oxidation. And based on the analysis of surface characteristics of mFe/Cu particles, it is further demonstrated that PS could enhance the reactivity of mFe/Cu through rapid corrosion of iron surface and decrease of surface passivation of mFe/Cu surface when the low molar ratio of PS to mFe/Cu (i.e., 1:43) was used in this study. These results also illustrates mFe/Cu-PS can be as a high efficient pretreatment technology for the removal of toxic refractory PNP from wastewater.
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Affiliation(s)
- Qingqing Ji
- Department of Environmental Science and Engineering, School of Architecture and Environment, Sichuan University, Chengdu 610065, China
| | - Jun Li
- Department of Environmental Science and Engineering, School of Architecture and Environment, Sichuan University, Chengdu 610065, China
| | - Zhaokun Xiong
- Department of Environmental Science and Engineering, School of Architecture and Environment, Sichuan University, Chengdu 610065, China
| | - Bo Lai
- Department of Environmental Science and Engineering, School of Architecture and Environment, Sichuan University, Chengdu 610065, China.
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41
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Wang X, Cong S, Wang P, Ma J, Liu H, Ning P. Novel green micelles Pluronic F-127 coating performance on nano zero-valent iron: Enhanced reactivity and innovative kinetics. Sep Purif Technol 2017. [DOI: 10.1016/j.seppur.2016.09.009] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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42
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Nanoscale, zero valent iron particles for application as oxygen scavenger in food packaging. Food Packag Shelf Life 2017. [DOI: 10.1016/j.fpsl.2017.01.003] [Citation(s) in RCA: 46] [Impact Index Per Article: 6.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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43
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Zhang X, Wu Y. Application of coupled zero-valent iron/biochar system for degradation of chlorobenzene-contaminated groundwater. WATER SCIENCE AND TECHNOLOGY : A JOURNAL OF THE INTERNATIONAL ASSOCIATION ON WATER POLLUTION RESEARCH 2017; 75:571-580. [PMID: 28192351 DOI: 10.2166/wst.2016.503] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Abstract
A novel iron-carbon micro-electrolysis system, bamboo-derived biochar coupled with zero-valent iron (ZVI), was investigated for chlorobenzene (CB)-contaminated groundwater removal. Influences of initial pH value, mass ratio of the ZVI/Biochar, initial CB concentration and ionic strength of the ZVI/Biochar micro-electrolysis were studied. The results indicated that the increase of initial pH led to the decrease of the CB removal efficiency. While the optimum mass ratio of ZVI to biochar was 2:1, the improved initial concentration and reaction time were 33.68 mg/L and 4 h, respectively. When pH of 2, mass ratio of 2:1 and reaction time of 4 h were applied, the CB removal efficiency was 99.92%. Enhanced degradation of CB was observed with increased Cl- concentration. When the Cl- concentration of 1,000 mg/L and reaction time of 1 h were applied, the CB removal efficiency arrived at 98.2%. Additionally, considering that biochar is cost-effective and readily produced, the coupled ZVI/Biochar micro-electrolysis could represent an effective approach for the treatment of groundwater containing chlorinated organic compounds in the future.
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Affiliation(s)
- Xu Zhang
- School of Environmental Science and Engineering, Shanghai Jiao Tong University, 800 Dongchuan Road, Shanghai 200240, China E-mail:
| | - Yanqing Wu
- School of Environmental Science and Engineering, Shanghai Jiao Tong University, 800 Dongchuan Road, Shanghai 200240, China E-mail:
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44
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Cheng R, Xue X, Shi L, Zhang T, Liu Y, Kang M, Zheng X. Degradation of 4-chlorophenol by mixed Fe 0/Fe 3O 4 nanoparticles: from the perspective of mechanisms. WATER SCIENCE AND TECHNOLOGY : A JOURNAL OF THE INTERNATIONAL ASSOCIATION ON WATER POLLUTION RESEARCH 2017; 75:263-270. [PMID: 28112653 DOI: 10.2166/wst.2016.505] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Abstract
Fe0 nanoparticles have been widely studied for pollution abatement in recent years; however, regarding the mechanism for pollutant degradation, studies have mainly focused on the reductive dechlorination by Fe0, and the dynamic process has not been clarified completely. As reported, some organics could be degraded during the oxidation of Fe0 by O2, and hydrogen peroxide was supposed to be produced. In this study, Fe3O4, an oxidation product of Fe0, was used to treat the pollutant combining with Fe0 nanoparticles, and 4-chlorophenol (4-CP) was used as the model pollutant. The results showed that the addition of Fe3O4 nanoparticles hindered the removal of 4-CP by Fe0 nanoparticles under anoxic conditions. However, the dechlorination efficiency was improved in the initial 6 h. Under aerobic conditions, the reused Fe3O4 nanoparticles would improve the removal and dechlorination of 4-CP. Especially, the dechlorination efficiency was obviously increased. It is proposed that the removal of 4-CP was due to the effects of both nanosized Fe0 and Fe3O4 - reducing action of Fe0 and catalytic oxidation action of Fe3O4. The reducing action of Fe0 was the major factor under anoxic conditions. And the catalytic oxidation action of Fe3O4 became an important reason under aerobic conditions.
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Affiliation(s)
- Rong Cheng
- School of Environment & Natural Resources, Renmin University of China, No. 59 Zhongguancun Street, Haidian District, Beijing 100872, China E-mail:
| | - Xingyan Xue
- School of Environment & Natural Resources, Renmin University of China, No. 59 Zhongguancun Street, Haidian District, Beijing 100872, China E-mail:
| | - Lei Shi
- School of Environment & Natural Resources, Renmin University of China, No. 59 Zhongguancun Street, Haidian District, Beijing 100872, China E-mail:
| | - Tao Zhang
- School of Environment & Natural Resources, Renmin University of China, No. 59 Zhongguancun Street, Haidian District, Beijing 100872, China E-mail:
| | - Yaping Liu
- School of Environment & Natural Resources, Renmin University of China, No. 59 Zhongguancun Street, Haidian District, Beijing 100872, China E-mail:
| | - Mi Kang
- School of Environment & Natural Resources, Renmin University of China, No. 59 Zhongguancun Street, Haidian District, Beijing 100872, China E-mail:
| | - Xiang Zheng
- School of Environment & Natural Resources, Renmin University of China, No. 59 Zhongguancun Street, Haidian District, Beijing 100872, China E-mail:
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45
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Katayama Y, Aoyagi M, Matsumoto T, Harada H, Simion AM, Egashira N, Mitoma Y, Simion C. Hydrodehalogenation of hexachloro- and hexabromobenzene by metallic calcium in ethanol, in the presence of Rh/C catalyst. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2017; 24:591-597. [PMID: 27743324 DOI: 10.1007/s11356-016-7785-8] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/09/2016] [Accepted: 09/26/2016] [Indexed: 06/06/2023]
Abstract
Both hexachlorobenzene and hexabromobenzene were successfully hydrodehalogenated to the monohalogenated derivative and ultimately to benzene (which was subsequently reduced to cyclohexane) using a mixture of metallic Ca, ethanol, and Rh/C, by simple stirring in diethyl ether, at room or mild temperature (60 °C). Various experiments were performed in order to assess the role of the solvent and Rh/C catalyst, as well as for elucidating the reaction pathway.
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Affiliation(s)
- Yumi Katayama
- Department of Biological System Sciences, Graduate School of Comprehensive Scientific Research, Prefectural University of Hiroshima, 562 Nanatsuka-Cho, Shobara City, Hiroshima, 727-0023, Japan
| | - Mitsuru Aoyagi
- Department of Environmental Sciences, Prefectural University of Hiroshima, 562 Nanatsuka-Cho, Shobara City, Hiroshima, 727-0023, Japan
| | - Takuya Matsumoto
- Department of Environmental Sciences, Prefectural University of Hiroshima, 562 Nanatsuka-Cho, Shobara City, Hiroshima, 727-0023, Japan
| | - Hiroyuki Harada
- Department of Environmental Sciences, Prefectural University of Hiroshima, 562 Nanatsuka-Cho, Shobara City, Hiroshima, 727-0023, Japan
| | - Alina M Simion
- Department of Organic Chemistry, Politehnica University of Bucharest, 060042, Bucharest, Romania
| | - Naoyoshi Egashira
- Department of Environmental Sciences, Prefectural University of Hiroshima, 562 Nanatsuka-Cho, Shobara City, Hiroshima, 727-0023, Japan
| | - Yoshiharu Mitoma
- Department of Environmental Sciences, Prefectural University of Hiroshima, 562 Nanatsuka-Cho, Shobara City, Hiroshima, 727-0023, Japan.
| | - Cristian Simion
- Department of Organic Chemistry, Politehnica University of Bucharest, 060042, Bucharest, Romania.
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46
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Liu H, Ruan X, Zhao D, Fan X, Feng T. Enhanced Adsorption of 2,4-Dichlorophenol by Nanoscale Zero-Valent Iron Loaded on Bentonite and Modified with a Cationic Surfactant. Ind Eng Chem Res 2016. [DOI: 10.1021/acs.iecr.6b03864] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Hong Liu
- College
of Resource and Environmental Engineering, Wuhan University of Science and Technology, Wuhan 430081, China
| | - Xia Ruan
- College
of Resource and Environmental Engineering, Wuhan University of Science and Technology, Wuhan 430081, China
| | - Dongye Zhao
- Environmental
Engineering Program, Department of Civil Engineering, Auburn University, Auburn, Alabama 36849, United States
| | - Xianyuan Fan
- College
of Resource and Environmental Engineering, Wuhan University of Science and Technology, Wuhan 430081, China
| | - Tao Feng
- College
of Resource and Environmental Engineering, Wuhan University of Science and Technology, Wuhan 430081, China
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47
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Tan L, Liang B, Cheng W, Fang Z, Tsang EP. Effect of solvent on debromination of decabromodiphenyl ether by Ni/Fe nanoparticles and nano zero-valent iron particles. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2016; 23:22172-22182. [PMID: 27544529 DOI: 10.1007/s11356-016-7285-x] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/06/2016] [Accepted: 07/18/2016] [Indexed: 06/06/2023]
Abstract
Nano zero-valent iron (nZVI) and its modified nanomaterials are widely used in the degradation of some halogenated organic pollutants. In this study, we explored the effects of different proportions of tetrahydrofuran (THF) (50, 60, 70, 80, 90, and 100 %) on the degradation of decabromodiphenyl ether (BDE209) by Ni/Fe and nZVI nanoparticles with reference to the degradation kinetics, products, and pathway. The results illustrated that the effects of solvent on the degradation of BDE209 were similar when the two kinds of nanomaterials were used, although the Ni/Fe bimetallic nanoparticles exhibited a better catalytic activity compared with the pure nZVI during the degradation of BDE209. The apparent reaction rate constant (k obs) increased with the proportion of the water in the system, enhancing the degradation of BDE209. In terms of degradation products, a high proportion of THF led to an accumulation of higher-brominated BDEs, inhibiting the further debromination of BDE209. The inhibitory effect of the solvent (THF) can be explained that water played a role of hydrogen donor during the reductive degradation of BDE209 in the THF/water system. However, the proportion of THF in the degradation system posed no effect on the BDE209 debromination pathway and debromination location. The difficulty of para-debromination was observed in all of the solvent systems.
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Affiliation(s)
- Lei Tan
- School of Chemistry and Environment, South China Normal University, Guangzhou, 51006, China
- Guangdong Technology Research Centre for Ecological Management and Remediation of Water System, Guangzhou, 51006, China
| | - Bin Liang
- School of Chemistry and Environment, South China Normal University, Guangzhou, 51006, China
- Guangdong Technology Research Centre for Ecological Management and Remediation of Water System, Guangzhou, 51006, China
| | - Wen Cheng
- School of Chemistry and Environment, South China Normal University, Guangzhou, 51006, China.
- Guangdong Technology Research Centre for Ecological Management and Remediation of Water System, Guangzhou, 51006, China.
| | - Zhanqiang Fang
- School of Chemistry and Environment, South China Normal University, Guangzhou, 51006, China.
- Guangdong Technology Research Centre for Ecological Management and Remediation of Water System, Guangzhou, 51006, China.
| | - Eric Pokeung Tsang
- Guangdong Technology Research Centre for Ecological Management and Remediation of Water System, Guangzhou, 51006, China
- Department of Science and Environmental Studies, Hong Kong Institute of Education, Hong Kong, 00852, China
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48
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Lama Y, Sinha A, Singh G, Masto RE. Reductive dehalogenation of endosulfan by cast iron: Kinetics, pathways and modeling. CHEMOSPHERE 2016; 150:772-780. [PMID: 26653031 DOI: 10.1016/j.chemosphere.2015.11.034] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/17/2015] [Revised: 11/03/2015] [Accepted: 11/11/2015] [Indexed: 06/05/2023]
Abstract
Cast iron has been a material of choice for in-situ remediation of groundwater. In this study interaction of endosulfan with High Carbon Iron Filings (HCIF) was studied in batch reactors. Decline in total concentration (Ct) could be related to aqueous concentration (Ca) by equation dCt/dt = k1.M.Ca(n), where reaction rate constant (k1) and order (n) were found to be 1.246 × 10(-4) L g(-1) iron h(-1) and 1.47, respectively. Partitioning of endosulfan to HCIF could be explained by Freundlich isotherm. The process of simultaneous reductive dehalogenation and adsorption/desorption was successfully modelled. The reductive dehalogenation of endosulfan resulted in by-products identified as [(3a, alpha,7beta,7a alpha,8s)-4,5,6,7,8 Pentachloro 3a,4,7,7a-tetrahydro] (C9H3Cl5O3) and Benzofuran,4,5,7-trichloro-2,3-dihydro-2-methyl (C9H7Cl3O).
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Affiliation(s)
- Yangdup Lama
- Department of Environmental Science and Engineering, Indian School of Mines, Dhanbad, Jharkhand 826004, India
| | - Alok Sinha
- Department of Environmental Science and Engineering, Indian School of Mines, Dhanbad, Jharkhand 826004, India.
| | - Gurdeep Singh
- Department of Environmental Science and Engineering, Indian School of Mines, Dhanbad, Jharkhand 826004, India
| | - Reginald E Masto
- Environmental Management Division, Central Institute of Mining and Fuel Research (Digwadih Campus), PO: FRI, Dhanbad, Jharkhand 828108, India
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49
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Nascimento MA, Lopes RP, Cruz JC, Silva AA, Lima CF. Sulfentrazone dechlorination by iron-nickel bimetallic nanoparticles. ENVIRONMENTAL POLLUTION (BARKING, ESSEX : 1987) 2016; 211:406-413. [PMID: 26802513 DOI: 10.1016/j.envpol.2015.12.043] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/27/2015] [Revised: 12/19/2015] [Accepted: 12/21/2015] [Indexed: 06/05/2023]
Abstract
The sulfentrazone dechlorination using bimetallic nanoparticles of Fe/Ni was studied. Different variables that could influence the sulfentrazone conversion were investigated, such as nitrogen atmosphere, pH and dosage of the nanoparticles and initial concentration of sulfentrazone. The best results were obtained using controlled pH (pH 4.0) and 1.0 g L(-1) of nanomaterials, resulting in 100 % conversion in only 30 min. Kinetic studies were also conducted, evaluating the influence of different nanoparticle dosages (1.0 to 4.0 g L(-1)), system temperatures (20 to 35 °C) and nickel levels in the composition of the nanomaterials (0.025 to 0.10 gNi/gFe). The mechanism of sulfentrazone conversion has changed due a direct reduction on the catalytic activity sites and indirect reduction by atomic hydrogen. Both mechanisms have followed pseudo-first order models. The conversion rate improved when the dosage of the nanomaterials, system temperature and nickel content in the composition of the nanocomposites were increased. Finally, the conversion products were elucidated by mass spectrometry and toxicity assays were performed using Daphnia Similis. The results showed that the dechlorination product is less toxic than sulfentrazone.
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Affiliation(s)
- Mayra A Nascimento
- Department of Chemistry, Federal University of Viçosa, Viçosa, MG, 36570-000, Brazil
| | - Renata P Lopes
- Department of Chemistry, Federal University of Viçosa, Viçosa, MG, 36570-000, Brazil.
| | - Jean C Cruz
- Department of Chemistry, Federal University of Viçosa, Viçosa, MG, 36570-000, Brazil
| | - Antônio A Silva
- Department of Crop Science, Federal University of Viçosa, Viçosa, MG, 36570-000, Brazil
| | - Claudio F Lima
- Department of Chemistry, Federal University of Viçosa, Viçosa, MG, 36570-000, Brazil
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50
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Xie S, Huang P, Kruzic JJ, Zeng X, Qian H. A highly efficient degradation mechanism of methyl orange using Fe-based metallic glass powders. Sci Rep 2016; 6:21947. [PMID: 26902824 PMCID: PMC4763293 DOI: 10.1038/srep21947] [Citation(s) in RCA: 59] [Impact Index Per Article: 7.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/18/2015] [Accepted: 02/03/2016] [Indexed: 12/24/2022] Open
Abstract
A new Fe-based metallic glass with composition Fe76B12Si9Y3 (at. %) is found to have extraordinary degradation efficiency towards methyl orange (MO, C14H14N3SO3) in strong acidic and near neutral environments compared to crystalline zero-valent iron (ZVI) powders and other Fe-based metallic glasses. The influence of temperature (294–328 K) on the degradation reaction rate was measured using ball-milled metallic glass powders revealing a low thermal activation energy barrier of 22.6 kJ/mol. The excellent properties are mainly attributed to the heterogeneous structure consisting of local Fe-rich and Fe-poor atomic clusters, rather than the large specific surface and strong residual stress in the powders. The metallic glass powders can sustain almost unchanged degradation efficiency after 13 cycles at room temperature, while a drop in degradation efficiency with further cycles is attributed to visible surface oxidation. Triple quadrupole mass spectrometry analysis conducted during the reaction was used to elucidate the underlying degradation mechanism. The present findings may provide a new, highly efficient and low cost commercial method for azo dye wastewater treatment.
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Affiliation(s)
- Shenghui Xie
- College of Materials Science and Engineering, Shenzhen University, Shenzhen Engineering Laboratory for Advanced Technology of Ceramics and Shenzhen Key Laboratory of Special Functional Materials, ShenZhen, 518060, China
| | - Ping Huang
- College of Materials Science and Engineering, Shenzhen University, Shenzhen Engineering Laboratory for Advanced Technology of Ceramics and Shenzhen Key Laboratory of Special Functional Materials, ShenZhen, 518060, China
| | - Jamie J Kruzic
- Materials Science, School of Mechanical, Industrial, and Manufacturing Engineering, Oregon State University, Corvallis, OR 97331, USA
| | - Xierong Zeng
- College of Materials Science and Engineering, Shenzhen University, Shenzhen Engineering Laboratory for Advanced Technology of Ceramics and Shenzhen Key Laboratory of Special Functional Materials, ShenZhen, 518060, China
| | - Haixia Qian
- College of Materials Science and Engineering, Shenzhen University, Shenzhen Engineering Laboratory for Advanced Technology of Ceramics and Shenzhen Key Laboratory of Special Functional Materials, ShenZhen, 518060, China
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