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Kumar S, Kaur P, Brar RS, Babu JN. Nanoscale zerovalent copper (nZVC) catalyzed environmental remediation of organic and inorganic contaminants: A review. Heliyon 2022; 8:e10140. [PMID: 36042719 PMCID: PMC9420493 DOI: 10.1016/j.heliyon.2022.e10140] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/25/2022] [Revised: 07/09/2022] [Accepted: 07/28/2022] [Indexed: 11/23/2022] Open
Abstract
Over the past decade, the nano zerovalent copper has emerged as an effective nano-catalyst for the environment remediation processes due to its ease of synthesis, low cost, controllable particle size and high reactivity despite its release during the remediation process and related concentration dependent toxicities. However, the improvised techniques involving the use of supports or immobilizer for the synthesis of Cu0 has significantly increased its stability and motivated the researchers to explore the applicability of Cu0 for the environment remediation processes, which is evident from access to numerous reports on nano zerovalent copper mediated remediation of contaminants. Initially, this review allows the understanding of the various resources used to synthesize zerovalent copper nanomaterial and the structure of Cu0 nanoparticles, followed by focus on the reaction mechanism and the species involved in the contaminant remediation process. The studies comprehensively presented the application of nano zerovalent copper for remediation of organic/inorganic contaminants in combination with various oxidizing and reducing agents under oxic and anoxic conditions. Further, it was evaluated that the immobilizers or support combined with various irradiation sources originates a synergistic effect and have a significant effect on the stability and the redox properties of nZVC in the remediation process. Therefore, the review proposed that the future scope of research should include rigorous focus on deriving an exact mechanism for synergistic effect for the removal of contaminants by supported nZVC.
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Affiliation(s)
- Sandeep Kumar
- Department of Chemistry, Akal University, Talwandi Sabo, Bathinda, 151302, Punjab, India
| | - Parminder Kaur
- Department of Chemistry, Akal University, Talwandi Sabo, Bathinda, 151302, Punjab, India
| | | | - J Nagendra Babu
- Department of Chemistry, School of Basic and Applied Science, Central University of Punjab, Bathinda, 151001, Punjab, India
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Zhang L, Fu Y, Wang Z, Zhou G, Zhou R, Liu Y. Removal of diclofenac in water using peracetic acid activated by zero valent copper. Sep Purif Technol 2021. [DOI: 10.1016/j.seppur.2021.119319] [Citation(s) in RCA: 12] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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Gushchin AA, Grinevich VI, Izvekova TV, Kvitkova EY, Tyukanova KA, Rybkin VV. Decomposition of сarbon tetrachloride under the action of a dielectric barrier discharge of atmospheric pressure in an oxygen atmosphere. CHEMOSPHERE 2021; 270:129392. [PMID: 33454557 DOI: 10.1016/j.chemosphere.2020.129392] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/29/2020] [Revised: 12/17/2020] [Accepted: 12/19/2020] [Indexed: 06/12/2023]
Abstract
In this study, the process of decomposition of carbon tetrachloride (CCl4) vapor in oxygen DBD at atmospheric pressure and its kinetic regularities have been studied. In the course of the experiments, it was shown that the efficiency of the decomposition of carbon tetrachloride in DBD can reach 100%. Depending on the conditions of the experiments, the effective rate constants were equal to (0.16-0.59) s-1, and the decomposition energy yields were (0.001-0.012) molecules per 100 eV of the inputed energy. The main decomposition products were CO2 and Cl2 molecules. The formation of a solid on the internal electrode of the reactor was also found. The substance contains atoms of carbon, oxygen, chlorine (C:O:Cl) = 1:0.38:0.01, as well as hydrogen atoms. The substance also contains functional groups -CH, -CH2, -OH and dimers of carboxylic (chlorocarboxylic) acids. Based on the solution of the Boltzmann equation for electrons, it is shown that for the compositions of a gas containing O2 molecules, ССl4, and decay products, the kinetic and transport characteristics of electrons are the same as in a pure oxygen discharge. Using the kinetic characteristics of electrons and the reaction rate constants the mechanisms of reactions leading to the found reaction products are proposed. It was shown that the primary reaction of destruction is the reaction of dissociation of CCl4 by electron impact, leading to the formation of CCl3• and Cl and the reaction with the O (1D) atom, as a result of which CCl3• and ClO• are formed.
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Affiliation(s)
- Andreiy A Gushchin
- Department of Industrial Ecology, Ivanovo State University of Chemistry and Technology, Sheremetiev Ave., 7, Ivanovo, 53000, Russia.
| | - Vladimir I Grinevich
- Department of Industrial Ecology, Ivanovo State University of Chemistry and Technology, Sheremetiev Ave., 7, Ivanovo, 53000, Russia
| | - Tatyana V Izvekova
- Department of Industrial Ecology, Ivanovo State University of Chemistry and Technology, Sheremetiev Ave., 7, Ivanovo, 53000, Russia
| | - Elena Yu Kvitkova
- Department of Industrial Ecology, Ivanovo State University of Chemistry and Technology, Sheremetiev Ave., 7, Ivanovo, 53000, Russia
| | - Kseniya A Tyukanova
- Department of Industrial Ecology, Ivanovo State University of Chemistry and Technology, Sheremetiev Ave., 7, Ivanovo, 53000, Russia
| | - Vladimir V Rybkin
- Department of Microelectronic Devices and Materials, Ivanovo State University of Chemistry and Technology, Sheremetiev Ave., 7, Ivanovo, 153000, Russia
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Zhang C, Xuan L, Zhang J, Yuan F, Kong X, Qin C. Degradation of organic contaminants through the activation of oxygen using zero valent copper coupled with sodium tripolyphosphate under neutral conditions. J Environ Sci (China) 2020; 90:375-384. [PMID: 32081333 DOI: 10.1016/j.jes.2020.01.001] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/21/2019] [Revised: 01/01/2020] [Accepted: 01/01/2020] [Indexed: 06/10/2023]
Abstract
In this study, sodium tripolyphosphate (STPP) was used to promote the removal of organic pollutants in a zero-valent copper (ZVC)/O2 system under neutral conditions for the first time. 20 mg/L p-nitrophenol (PNP) can be completely decomposed within 120 min in the ZVC/O2/STPP system. The PNP degradation process followed pseudo-first-order kinetics and the degradation rate of PNP gradually increased upon the decreasing ZVC particle size. The optimal pH of the reaction system was 5.0. Our mechanism investigation showed that Cu+ generated by ZVC corrosion was the main reducing agent for the activation of O2 to produce ROS. ·OH was identified as the only ROS formed during the degradation of PNP and its production pathway was the double-electron activation of O2 (O2→H2O2→·OH). In this process, STPP did not only promote the release of Cu+ through its complexation, but also promoted the production of ·OH by reducing the redox potential of Cu2+/Cu+. In addition, we could initiate and terminate the reaction by controlling the pH. At pH < 8.1, ZVC/O2/STPP could continuously degrade organic pollutants; at pH > 8.1, the reaction was terminated. STPP was recycled to continuously promote the corrosion of ZVC and O2 activation as long as the pH was <8.1. This study provided a new and efficient way for O2 activation and organic contaminants removal.
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Affiliation(s)
- Chengwu Zhang
- Key Laboratory of Groundwater Resources and Environment, Ministry of Education, Jilin University, Changchun 130021, China; Jilin Provincial Key Laboratory of Water Resources and Environment, Jilin University, Changchun 130021, China; National and Local Joint Engineering Laboratory for Petrochemical Contaminated Site Control and Remediation Technology, Jilin University, Changchun 130021, China
| | - Lishuang Xuan
- Key Laboratory of Groundwater Resources and Environment, Ministry of Education, Jilin University, Changchun 130021, China; Jilin Provincial Key Laboratory of Water Resources and Environment, Jilin University, Changchun 130021, China; National and Local Joint Engineering Laboratory for Petrochemical Contaminated Site Control and Remediation Technology, Jilin University, Changchun 130021, China
| | - Jingyi Zhang
- Key Laboratory of Groundwater Resources and Environment, Ministry of Education, Jilin University, Changchun 130021, China; Jilin Provincial Key Laboratory of Water Resources and Environment, Jilin University, Changchun 130021, China; National and Local Joint Engineering Laboratory for Petrochemical Contaminated Site Control and Remediation Technology, Jilin University, Changchun 130021, China
| | - Fang Yuan
- Key Laboratory of Groundwater Resources and Environment, Ministry of Education, Jilin University, Changchun 130021, China; Jilin Provincial Key Laboratory of Water Resources and Environment, Jilin University, Changchun 130021, China; National and Local Joint Engineering Laboratory for Petrochemical Contaminated Site Control and Remediation Technology, Jilin University, Changchun 130021, China
| | - Xianglong Kong
- Key Laboratory of Groundwater Resources and Environment, Ministry of Education, Jilin University, Changchun 130021, China; Jilin Provincial Key Laboratory of Water Resources and Environment, Jilin University, Changchun 130021, China; National and Local Joint Engineering Laboratory for Petrochemical Contaminated Site Control and Remediation Technology, Jilin University, Changchun 130021, China
| | - Chuanyu Qin
- Key Laboratory of Groundwater Resources and Environment, Ministry of Education, Jilin University, Changchun 130021, China; Jilin Provincial Key Laboratory of Water Resources and Environment, Jilin University, Changchun 130021, China; National and Local Joint Engineering Laboratory for Petrochemical Contaminated Site Control and Remediation Technology, Jilin University, Changchun 130021, China.
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Zhao J, Shi R, Quan Y, Liu J, Wang J, Pei Y, Wang X, Li Z, Ren J. Highly efficient synthesis of dimethyl carbonate over copper catalysts supported on resin-derived carbon microspheres. Chem Eng Sci 2019. [DOI: 10.1016/j.ces.2019.07.039] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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de Sousa PVF, de Oliveira AF, da Silva AA, Lopes RP. Environmental remediation processes by zero valence copper: reaction mechanisms. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2019; 26:14883-14903. [PMID: 30972682 DOI: 10.1007/s11356-019-04989-3] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/04/2019] [Accepted: 03/25/2019] [Indexed: 06/09/2023]
Abstract
Recent studies have shown Cu(0) as a promising material for the removal of organic and inorganic pollutants. However, there is no review addressing the studies performed. This fact may be related to the toxicity of the particles and the copper released in solution that has not motivated researchers, which entails in a reduced number of publications. However, studies point out how to solve the problem of Cu deposition in support materials. In this work, a detailed review of Cu(0) applications was performed. The specific focus was the reaction mechanisms related to adsorption, oxidation, and reduction processes. Initially, the resources that allow the understanding of the reaction mechanism, such as characterization techniques and the experimental conditions for investigation of the species involved in the process, were presented. The studies were evaluated separately, showing the mechanisms involved only with the application of Cu(0) in pure and isolated form and in association with oxidizing or reductive agents, combined with irradiation sources and ultrasonic waves and in the form supported in polymer matrices. It was verified that by the proposed reaction mechanisms, the exclusive participation of Cu(0), being the removal process, explained only by the redox behavior of copper. Therefore, the review showed the need for future research regarding the redox behavior of the contaminants.
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Affiliation(s)
| | | | | | - Renata Pereira Lopes
- Chemistry Department, Universidade Federal de Viçosa, Viçosa, MG, 36570-000, Brazil.
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Chiang Hsieh LH, Ou HH, Huang CW. Adsorption of Cu(II) in aqueous solution using microwave-assisted titanate nanotubes. APPLIED NANOSCIENCE 2018. [DOI: 10.1007/s13204-018-0932-4] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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Xu M, Gu X, Lu S, Qiu Z, Sui Q, Miao Z, Zang X, Wu X. Degradation of carbon tetrachloride in aqueous solution in the thermally activated persulfate system. JOURNAL OF HAZARDOUS MATERIALS 2015; 286:7-14. [PMID: 25544995 DOI: 10.1016/j.jhazmat.2014.12.031] [Citation(s) in RCA: 41] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/08/2014] [Revised: 12/10/2014] [Accepted: 12/18/2014] [Indexed: 06/04/2023]
Abstract
Thermal activation of persulfate (PS) has been identified to be effective in the destruction of organic pollutants. The feasibility of carbon tetrachloride (CT) degradation in the thermally activated PS system was evaluated. The experimental results showed that CT could be readily degraded at 50 °C with a PS concentration of 0.5M, and CT degradation and PS consumption followed the pseudo-first order kinetic model. Superoxide radical anion (O2(*-)) was the predominant radical species responsible for CT degradation and the split of CCl was proposed as the possible reaction pathways for CT degradation. The process of CT degradation was accelerated by higher PS dose and lower initial CT concentration. No obvious effect of the initial pH on the degradation of CT was observed in the thermally activated PS system. Cl(*-), HCO3(*-), and humic acid (HA) had negative effects on CT degradation. In addition, the degradation of CT in the thermally activated PS system could be significantly promoted by the solvents addition to the solution. In conclusion, the thermally activated PS process is a promising option in in-situ chemical oxidation/reduction remediation for degrading highly oxidized organic contaminants such as CT that is widely detected in contaminated sites.
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Affiliation(s)
- Minhui Xu
- State Environmental Protection Key Laboratory of Environmental Risk Assessment and Control on Chemical Process, East China University of Science and Technology, Shanghai 200237, China
| | - Xiaogang Gu
- State Environmental Protection Key Laboratory of Environmental Risk Assessment and Control on Chemical Process, East China University of Science and Technology, Shanghai 200237, China
| | - Shuguang Lu
- State Environmental Protection Key Laboratory of Environmental Risk Assessment and Control on Chemical Process, East China University of Science and Technology, Shanghai 200237, China.
| | - Zhaofu Qiu
- State Environmental Protection Key Laboratory of Environmental Risk Assessment and Control on Chemical Process, East China University of Science and Technology, Shanghai 200237, China
| | - Qian Sui
- State Environmental Protection Key Laboratory of Environmental Risk Assessment and Control on Chemical Process, East China University of Science and Technology, Shanghai 200237, China
| | - Zhouwei Miao
- State Environmental Protection Key Laboratory of Environmental Risk Assessment and Control on Chemical Process, East China University of Science and Technology, Shanghai 200237, China
| | - Xueke Zang
- State Environmental Protection Key Laboratory of Environmental Risk Assessment and Control on Chemical Process, East China University of Science and Technology, Shanghai 200237, China
| | - Xiaoliang Wu
- State Environmental Protection Key Laboratory of Environmental Risk Assessment and Control on Chemical Process, East China University of Science and Technology, Shanghai 200237, China
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Synthesis of buoyant metal-coated fly ash cenosphere and its excellent catalytic performance in dye degradation. J Colloid Interface Sci 2015; 444:10-6. [DOI: 10.1016/j.jcis.2014.12.059] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/17/2014] [Revised: 12/11/2014] [Accepted: 12/16/2014] [Indexed: 11/20/2022]
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Wen G, Wang SJ, Ma J, Huang TL, Liu ZQ, Zhao L, Xu JL. Oxidative degradation of organic pollutants in aqueous solution using zero valent copper under aerobic atmosphere condition. JOURNAL OF HAZARDOUS MATERIALS 2014; 275:193-199. [PMID: 24857902 DOI: 10.1016/j.jhazmat.2014.05.002] [Citation(s) in RCA: 58] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/15/2014] [Revised: 04/30/2014] [Accepted: 05/02/2014] [Indexed: 06/03/2023]
Abstract
Oxidative degradation of organic pollutants and its mechanism were investigated in aqueous solution using zero valent copper (ZVC) under aerobic atmosphere condition. Diethyl phthalate (DEP) was completely oxidized after 120 min reaction by ZVC at initial pH 2.5 open to the air. DEP degradation followed the pseudo-first-order kinetics after the lag period, and the degradation rate of DEP increased gradually with the increase of ZVC dosage, and the decrease of initial pH from 5.8 to 2.0. ZVC required a shorter induction time and exhibited persistent oxidation capacity compared to that of zero valent iron and zero valent aluminium. The mechanism investigation showed that remarkable amount of Cu(+)/Cu(2+) and H2O2 were formed in ZVC acidic system, which was due to the corrosive dissolution of ZVC and the concurrent reduction of oxygen. The addition of tert-butanol completely inhibited the degradation of DEP and the addition of Fe(2+) greatly enhanced the degradation rate, which demonstrated that hydroxyl radical was mainly responsible for the degradation of DEP in ZVC acidic system under aerobic atmosphere condition, and the formation of hydroxyl radical was attributed to the Fenton-like reaction of in situ formed Cu(+) with H2O2.
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Affiliation(s)
- Gang Wen
- School of Environmental and Municipal Engineering, Xi'an University of Architecture and Technology, Xi'an 710050, People's Republic of China
| | - Sheng-Jun Wang
- State Key Laboratory of Urban Water Resource and Environment, Harbin Institute of Technology, Harbin 150090, People's Republic of China; Beijing General Municipal Engineering Design and Research Institute, Beijing 100082, People's Republic of China
| | - Jun Ma
- State Key Laboratory of Urban Water Resource and Environment, Harbin Institute of Technology, Harbin 150090, People's Republic of China.
| | - Ting-Lin Huang
- School of Environmental and Municipal Engineering, Xi'an University of Architecture and Technology, Xi'an 710050, People's Republic of China
| | - Zheng-Qian Liu
- School of Environmental Science and Engineering, Huazhong University of Science and Technology, Wuhan 430074, People's Republic of China
| | - Lei Zhao
- Key Laboratory of Structures Dynamic Behavior and Control, Harbin Institute of Technology, Ministry of Education, Harbin 150090, People's Republic of China; School of Civil Engineering, Harbin Institute of Technology, Harbin 150090, People's Republic of China
| | - Jin-Lan Xu
- School of Environmental and Municipal Engineering, Xi'an University of Architecture and Technology, Xi'an 710050, People's Republic of China
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Lee CL, Lin C, Jou CJG. Microwave-induced nanoscale zero-valent iron degradation of perchloroethylene and pentachlorophenol. JOURNAL OF THE AIR & WASTE MANAGEMENT ASSOCIATION (1995) 2012; 62:1443-1448. [PMID: 23362763 DOI: 10.1080/10962247.2012.719579] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/01/2023]
Abstract
UNLABELLED Microwave (MW) is applied to enhance perchloroethylene (PCE) or pentachlorophenol (PCP) removal using zero-valent iron (ZVI; Fe(0)) as the dielectric medium. ZVI has a much higher dielectric loss factor (39.5) than other media; it is capable of absorbing MW radiation rapidly to speed up the release of electrons, leading to rises of the ZVI particle surface temperature. If the MW power is continued, excessive electricity will accumulated inside ZVI particles, resulting in sparks. The results show that during the initial 5 sec (700 W), the linear aliphatic PCE has a faster decomposing rate than the ringed PCP (82.0% vs. 4.8%) because less energy is required for decomposing the linear-chlorine bond (90 kcal mol(-1)) than ring-chlorine bonds (95 kcal mol(-1)). Later the removal rate for either PCE or PCP remains the same when the exposure time is between 5 and 60 sec. Without MW irradiation, linear PCE molecules have larger surface area to contact ZVI, and hence they have better removal efficiencies than PCP molecules. Using Fe(0) as a microwave dielectric medium to treat PCE or PCP is a new and worthwhile treatment technology; it is environmentally friendly, and its use will eliminate the secondary pollution. IMPLICATIONS Nanoscale iron particles are characterized by high surface-area-to-volume ratios, high specific surface area, and high surface reactivity. With a much higher dielectric loss factor, it is capable of absorbing MW radiation rapidly to speed up the release of electrons, leading to rise in temperature. The time needed to achieve a satisfactory treatment is also reduced, leading to significant saving of energy consumption to make this method cost-effective and also environmentally friendly for the industry to pursuit sustainable development.
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Affiliation(s)
- Chien-Li Lee
- Research and Development Center for Water Resource and Conservation, National Kaohsiung First University of Science and Technology, Taiwan, Republic of China
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Chun CL, Baer DR, Matson DW, Amonette JE, Penn RL. Characterization and reactivity of iron nanoparticles prepared with added Cu, Pd, and Ni. ENVIRONMENTAL SCIENCE & TECHNOLOGY 2010; 44:5079-5085. [PMID: 20509654 DOI: 10.1021/es903278e] [Citation(s) in RCA: 58] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/29/2023]
Abstract
The association of a secondary metal with iron particles affects redox reactivity in engineered remediation systems. However, the structural characteristics of the metal additives and mechanism responsible for changes in reactivity have not been fully elucidated. Here, we synthesized iron nanoparticles with Cu, Pd, and Ni content ranging from 0-2 mol % via a solution deposition process (SDP), hydrogen reduction process (HRP), or hydrogen reduction of ferrihydrite coprecipitated with the metal cations (HRCO). Results from solid-state characterization show that the synthesis methods produced similar iron core/magnetite shell particles but produced substantial differences in terms of the distribution of the metal additives. In SDP, the metal additives were heterogeneously distributed on the surface of the particles. The metal additives were clearly discernible in TEM images as spherical nanoparticles (5-20 nm) on the HRP and HRCO particles. Because the metals were integral to the synthesis process, we hypothesize that the metal additive is present as solute within the iron core of the HRCO particles. Kinetic batch experiments of carbon tetrachloride (CT) degradation were performed to quantitatively compare the redox reactivity of the particles. Overall, metal additives resulted in enhanced pseudo-first-order rate constants of CT degradation (k(O,CT)) compared to that of the iron nanoparticles. For the bimetallic iron nanoparticles prepared by SDP and HRP, k(O,CT) increased with the concentration of metal additives. The values of chloroform yield (Y(CF)) were independent of the identity and amount of metal additives. However, both k(O,CT) and Y(CF) of the HRCO iron particles were significantly increased. Results suggest that it is the distribution of the metal additives that most strongly impacts reactivity and product distribution. For example, for materials with ca. 0.9 mol % Ni, reactivity and Y(CF) varied substantially (HRCO > SDP > HRP), and HRCO-NiFe resulted in the lowest final chloroform concentration because chloroform was rapidly dechlorinated. In addition, sequential spike experiments for long-term reactivity demonstrated that the presence of the metal additives facilitated reduction by enabling greater utilization of Fe(0).
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Affiliation(s)
- Chan Lan Chun
- Department of Chemistry, University of Minnesota, Minneapolis, Minnesota 55455, USA
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Rivero-Huguet M, Marshall WD. Reduction of hexavalent chromium mediated by micro- and nano-sized mixed metallic particles. JOURNAL OF HAZARDOUS MATERIALS 2009; 169:1081-1087. [PMID: 19446392 DOI: 10.1016/j.jhazmat.2009.04.062] [Citation(s) in RCA: 28] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/02/2009] [Revised: 03/24/2009] [Accepted: 04/15/2009] [Indexed: 05/27/2023]
Abstract
A variety of micron-scale mixed metallic particles (Pd/Fe, Ag/Fe, Cu/Fe, Zn/Fe, Co/Fe, Mg/Fe, Ni/Fe, Al/Fe, Si/Fe, Pd/Cu and Pd/Zn; and Pd/Cu/Fe, Pd/Zn/Fe and Zn/Cu/Fe) and selected nano-sized bimetallic analogs (Pd/Fe, Cu/Fe and Pd/Cu) were evaluated for reducting activity with Cr(VI) in a surfactant preparation (Tween 20) under a variety of reaction conditions. Relative to the reactivity of the zero-valent iron, the tested bimetallic mixtures (Pd/Fe>Pd/Zn>Ag/Fe>Ni/Fe>Zn/Fe>Pd/Cu>Cu/Fe) appreciably increased the pseudo-first-order rate constant. The Zn/Cu/Fe represented a cost-effective preparation providing comparable or improved kinetic parameters relative to the more expensive palladized bimetallic mixtures. The Pd/Fe, Cu/Fe and Pd/Cu nano-sized particles proved to be more reactive (up to 100-fold) for the reductive remediation of Cr(VI). The results were comparable when working with nano-sized Cu and Fe particles, suggesting that the cementation of a noble metal serves not only as a reaction catalyst but also provides protection to the metallic surface, impeding its rapid inactivation.
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Affiliation(s)
- Mario Rivero-Huguet
- Department of Food Science and Agricultural Chemistry, McGill University, Ste-Anne-de-Bellevue, Qc, Canada
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Choi J, Choi K, Lee W. Effects of transition metal and sulfide on the reductive dechlorination of carbon tetrachloride and 1,1,1-trichloroethane by FeS. JOURNAL OF HAZARDOUS MATERIALS 2009; 162:1151-8. [PMID: 18621480 DOI: 10.1016/j.jhazmat.2008.06.007] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/13/2008] [Revised: 05/29/2008] [Accepted: 06/02/2008] [Indexed: 05/11/2023]
Abstract
Reductive dechlorination of carbon tetrachloride (CT) and 1,1,1-trichloroethane (1,1,1-TCA) by FeS with transition metals (Cu(II), Co(II), and Ni(II)) and hydrosulfide was characterized in this study. The batch kinetic experiments were conducted by spiking each stock solution of CT and 1,1,1-TCA into 33 g/L of FeS suspensions with and without transition metals at pH 7.5. No significant enhancement was observed in the reductive dechlorination of target compounds by FeS with 1mM transition metals. However, except the addition of Cu(II), the reduction rate of 1,1,1-TCA increased with increasing the concentration of transition metals. The rate constants with 10mM Co(II) and Ni(II) were 0.06 and 0.11h(-1), approximately 1.3 and 3.0 times greater than those by FeS alone. The addition of 20mM HS(-) also increased the rate constants of 1,1,1-TCA by FeS by one order of magnitude. SEM analysis showed that the addition of transition metal (Ni(II)) and HS(-) caused a noticeable morphologic change of FeS surface. The transition metal added was substituted by the structural iron resulting in the decrease of iron content of FeS (52.6-46.9%). One third of the transition metal in FeS suspension existed as zero-valent form playing a catalyst role to accelerate the reaction kinetics.
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Affiliation(s)
- Jeongyun Choi
- R&D Center, Samsung Engineering Co., Ltd., 415-10 Wancheon-Dong, Youngtong-Gu, Suwon, Gyeonggi-Do 443-823, Republic of Korea.
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Rivero-Huguet M, Marshall WD. Reduction of hexavalent chromium mediated by micron- and nano-scale zero-valent metallic particles. ACTA ACUST UNITED AC 2009; 11:1072-9. [PMID: 19436867 DOI: 10.1039/b819279k] [Citation(s) in RCA: 52] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A variety of zero-valent metals (Al(0), Cu(0), Fe(0), Mg(0), Ni(0), Si(0) and Zn(0)), and Cu(0) and Fe(0) nano-sized particles were evaluated for reactivity towards the reduction of Cr(VI) in a surfactant preparation (Tween 20) under a selection of reaction conditions. At circum neutral pHs, a rapid inactivation of the surface was observed for almost all of the tested metals and complete reduction of Cr(VI) was achieved at acidic pH only by using Cu(0), Fe(0), Mg(0) or Zn(0). A considerable increase in reactivity (up to 100-fold) was observed for reductive remediation with nano-sized particles. The use of a solid support as a dispersant and stabilizer circumvented the tendency of freshly prepared nano-particles to either react with surrounding media or agglomerate, resulting in the formation of much larger flocs and appreciable loss in reactivity. The formation of clusters by polymeric structures provided an extra protection of the nano-particle surface with a striking improvement in their reactivity mainly at more alkaline conditions. Therefore the incorporation of an innocuous stabilizer can substantially enhance the stability of nano-particles for environmental transformations.
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Affiliation(s)
- Mario Rivero-Huguet
- Department of Food Science and Agricultural Chemistry, McGill University, 21,111 Lakeshore Road, Ste-Anne-de-Bellevue, Qc, Canada H9X 3V9
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Valle-Orta M, Diaz D, Santiago-Jacinto P, Vázquez-Olmos A, Reguera E. Instantaneous Synthesis of Stable Zerovalent Metal Nanoparticles under Standard Reaction Conditions. J Phys Chem B 2008; 112:14427-34. [DOI: 10.1021/jp802773r] [Citation(s) in RCA: 30] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Maiby Valle-Orta
- Facultad de Química, Instituto de Física, and Centro de Ciencias Aplicadas y Desarrollo Tecnológico, Universidad Nacional Autónoma de México, Ciudad Universitaria, Coyoacán, CP 04510, México D. F., México, and CICATA U-Legaria, Instituto Politécnico Nacional, Legaria 694, Colonia Irrigación, Miguel Hidalgo, CP 11500, México D. F., México
| | - David Diaz
- Facultad de Química, Instituto de Física, and Centro de Ciencias Aplicadas y Desarrollo Tecnológico, Universidad Nacional Autónoma de México, Ciudad Universitaria, Coyoacán, CP 04510, México D. F., México, and CICATA U-Legaria, Instituto Politécnico Nacional, Legaria 694, Colonia Irrigación, Miguel Hidalgo, CP 11500, México D. F., México
| | - Patricia Santiago-Jacinto
- Facultad de Química, Instituto de Física, and Centro de Ciencias Aplicadas y Desarrollo Tecnológico, Universidad Nacional Autónoma de México, Ciudad Universitaria, Coyoacán, CP 04510, México D. F., México, and CICATA U-Legaria, Instituto Politécnico Nacional, Legaria 694, Colonia Irrigación, Miguel Hidalgo, CP 11500, México D. F., México
| | - América Vázquez-Olmos
- Facultad de Química, Instituto de Física, and Centro de Ciencias Aplicadas y Desarrollo Tecnológico, Universidad Nacional Autónoma de México, Ciudad Universitaria, Coyoacán, CP 04510, México D. F., México, and CICATA U-Legaria, Instituto Politécnico Nacional, Legaria 694, Colonia Irrigación, Miguel Hidalgo, CP 11500, México D. F., México
| | - Edilso Reguera
- Facultad de Química, Instituto de Física, and Centro de Ciencias Aplicadas y Desarrollo Tecnológico, Universidad Nacional Autónoma de México, Ciudad Universitaria, Coyoacán, CP 04510, México D. F., México, and CICATA U-Legaria, Instituto Politécnico Nacional, Legaria 694, Colonia Irrigación, Miguel Hidalgo, CP 11500, México D. F., México
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Lee CC, Doong RA. Dechlorination of tetrachloroethylene in aqueous solutions using metal-modified zerovalent silicon. ENVIRONMENTAL SCIENCE & TECHNOLOGY 2008; 42:4752-4757. [PMID: 18678001 DOI: 10.1021/es071545x] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/26/2023]
Abstract
The combination of zerovalent metal with a catalytic second metal ion (bimetallic materials) to enhance the dechlorination efficiency and rate of chlorinated compounds has received much attention. Bimetallic materials not only enhance the dechlorination process but also alter the reduction pathway and product distribution. In this study, the efficiency and rate of tetrachloroethylene (PCE) dechlorination by metal-modified zerovalent silicon was investigated as a potential reductant for chlorinated hydrocarbons under anoxic conditions. The X-ray photoelectron spectroscopic (XPS) results showed that metal ions including Ni(II), Cu(II), and Fe(II) could be reduced to their zerovalent forms on the Si surface. The dechlorination of PCE obeyed the pseudo-first-order kinetics, and the pseudo-first-order rate constants (k(obs)) for PCE dechlorination followed the order Ni/Si > Fe/Si > Cu/Si. Addition of Cu(II) lowered the dechlorination efficiency and rate of PCE by Si, while the k(obs) values for PCE dechlorination in the presence of 0.1 mM Fe(II) and Ni(II) were 1.5-3.8 times higher than that by Si alone. In addition, the efficiency and rate of PCE dechlorination increased upon increasing the mass loading of Ni(II) ranging between 0.05 and 0.5 mM and then decreased when the Ni(II) loading was further increased to 1 mM. The scanning electron microscopic (SEM) images and electron probe microanalytical (EPMA) maps showed that the Ni nanoparticles deposited on the Si surface and aggregated to a large particle at 1 mM Ni(II), which clearly depicts that the Ni(II) loading of 0.5 mM is the optimal value to enhance the efficiency and rate of PCE dechlorination by Si. Also, the reaction pathways for PCE dechlorination changed from hydrogenolysis in the absence of Ni(II) to hydrodechlorination when Ni(II) concentrations were higher than 0.05 mM. Results obtained in this study reveal that the metal-deposited zerovalent silicon can serve as an environmentally friendly reductant for the enhanced degradation of chlorinated hydrocarbons for long-term performance.
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Affiliation(s)
- Chun-Chi Lee
- Department of Biomedical Engineering and Environmental Sciences, National Tsing Hua University, 101, Section 2, Kuang Fu Road, Hsinchu 30013, Taiwan
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Han Y, Li W, Zhang M, Tao K. Catalytic dechlorination of monochlorobenzene with a new type of nanoscale Ni(B)/Fe(B) bimetallic catalytic reductant. CHEMOSPHERE 2008; 72:53-58. [PMID: 18378276 DOI: 10.1016/j.chemosphere.2008.02.002] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/27/2007] [Revised: 01/28/2008] [Accepted: 02/03/2008] [Indexed: 05/26/2023]
Abstract
A unique type of nanoscale Ni(B)/Fe(B) bimetallic catalytic reductant was prepared and used for dechlorination of monochlorobenzene (MCB). The sample Ni(B)/Fe(B) was synthesized by an electroless plating method, in which nanoscale Ni(B) was deposited on the surface of nanoscale Fe(B) synthesized by chemical reduction. The results suggest that the nanoscale Ni(B)/Fe(B) bimetallic catalytic reductant has higher dechlorination efficiency than Ni/Fe(B) catalytic reductant prepared by replacing Fe(B) with Ni(2+) in aqueous solution. The Ni content was found to be an important factor in catalytic dechlorination, with the dechlorination rate increasing with Ni content. The electroless plating method improve the efficiency of the Ni(2+) in the solution. Dechlorination takes place with the existence of nanoscale Ni(B)/Fe(B) bimetallic catalytic reductant via a pseudo-first-order reaction.
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Affiliation(s)
- Yi Han
- Institute of New Catalytic Materials Science, College of Chemistry, Nankai University, Tianjin 300071, PR China
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Luo W, Chen Z, Zhu L, Chen F, Wang L, Tang H. A sensitive spectrophotometric method for determination of carbon tetrachloride with the aid of ultrasonic decolorization of methyl orange. Anal Chim Acta 2007; 588:117-22. [PMID: 17386800 DOI: 10.1016/j.aca.2007.01.077] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/13/2007] [Revised: 01/28/2007] [Accepted: 01/31/2007] [Indexed: 11/26/2022]
Abstract
A sensitive method for carbon tetrachloride (CCl(4)) determination has been developed with the aid of ultrasonic oxidation decolorization of methyl orange (MO). It is found that the ultrasonic oxidation decolorization rate of MO can be significantly promoted by adding a little amount of CCl(4). The increased ultrasonic decolorization rate of MO is strongly dependent on the concentration of CCl(4) added, and a linear correlation is observed between the amount of CCl(4) and the decolorization rate of MO in the ultrasonic oxidation process. Thus, the CCl(4) determination is transformed to a simple and direct determination of the decoloration extent of MO solution at a given concentration. As an indirect spectrophotometric determination of CCl(4), the new method is sensitive and easy of operation with a maximum wavelength of 508 nm, molar absorptivity of 3.83 x 10(4) L mol(-1) cm(-1), and a Sandell sensitivity of 7.96 x 10(-3) microg cm(-2). Under optimized conditions, Beer's law is obeyed in the range of 0.4-20 mg L(-1) of CCl(4) (DL=0.19 mg L(-1), r=0.9996). The concentrations of CCl(4) in several practical samples have been determined satisfactorily by using this method.
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Affiliation(s)
- Wei Luo
- Department of Chemistry, Huazhong University of Science and Technology, Wuhan 430074, China
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Feng J, Lim TT. Iron-mediated reduction rates and pathways of halogenated methanes with nanoscale Pd/Fe: analysis of linear free energy relationship. CHEMOSPHERE 2007; 66:1765-74. [PMID: 16899274 DOI: 10.1016/j.chemosphere.2006.06.068] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/27/2006] [Revised: 06/24/2006] [Accepted: 06/26/2006] [Indexed: 05/11/2023]
Abstract
The influence of halogen substitution in chlorinated methanes and brominated methanes on their abiotic reductive dehalogenation with nanoscale Pd/Fe bimetallic particles was investigated in this study. The 0.2% and 1.0% Pd/Fe particles, with particle sizes of less than 100nm, were synthesized in the laboratory. Reduction of the halogenated methanes with the Pd/Fe particles followed pseudo-first-order kinetics. The Pd/Fe bimetallic particles demonstrated at least an order of magnitude higher in reactivity compared to the unpalladized Fe particles of similar particle size. Comparing the 0.2% Pd/Fe and the 1.0% Pd/Fe particles, the latter exhibited higher reduction rates of various halogenated methanes. On the other hand, the reduction rates of chlorinated methanes were consistently lower than those of their brominated counterparts. The compounds with higher number of halogen substitutions were more readily reduced than the lightly halogenated ones. Coupled hydrogenolysis-elimination processes were the important mechanism for complete dehalogenation of the chlorinated and brominated methanes. From the kinetic examination of their transformation rates and mechanistic insight into the associated pathways, an attempt to analyze linear free energy relationship between the observed kinetics and the associated thermodynamic constants was performed. The observed reaction rate constants were analyzed for their correlations with one-electron potential (E(1)), two-electron potential (E(2)), bond dissociation energy (BDE) and the lowest unoccupied molecular orbital (LUMO) energy (E(LUMO)). LUMO energy appeared to be the best descriptor for the kinetic prediction, while E(1) and E(2) might be more suitable for mechanistic analysis.
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Affiliation(s)
- Jing Feng
- Environmental Engineering Research Centre, School of Civil and Environmental Engineering, Nanyang Technological University, 50 Nanyang Avenue, Singapore 639798, Singapore
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