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Lewandowská Š, Vaňková Z, Beesley L, Cajthaml T, Wickramasinghe N, Vojar J, Vítková M, Tsang DCW, Ndungu K, Komárek M. Nano zerovalent Fe did not reduce metal(loid) leaching and ecotoxicity further than conventional Fe grit in contrasting smelter impacted soils: A 1-year field study. THE SCIENCE OF THE TOTAL ENVIRONMENT 2024; 927:171892. [PMID: 38531450 DOI: 10.1016/j.scitotenv.2024.171892] [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: 11/29/2023] [Revised: 03/20/2024] [Accepted: 03/20/2024] [Indexed: 03/28/2024]
Abstract
The majority of the studies on nanoscale zero-valent iron (nZVI) are conducted at a laboratory-scale, while field-scale evidence is scarce. The objective of this study was to compare the metal(loid) immobilization efficiency of selected Fe-based materials under field conditions for a period of one year. Two contrasting metal(loid) (As, Cd, Pb, Zn) enriched soils from a smelter-contaminated area were amended with sulfidized nZVI (S-nZVI) solely or combined with thermally stabilized sewage sludge and compared to amendment with microscale iron grit. In the soil with higher pH (7.5) and organic matter content (TOC = 12.7 %), the application of amendments resulted in a moderate increase in pH and reduced As, Cd, Pb, and Zn leaching after 1-year, with S-nZVI and sludge combined being the most efficient, followed by iron grit and S-nZVI alone. However, the amendments had adverse impacts on microbial biomass quantity, S-nZVI being the least damaging. In the soil with a lower pH (6.0) and organic matter content (TOC = 2.3 %), the results were mixed; 0.01 M CaCl2 extraction data showed only S-nZVI with sludge as remaining effective in reducing extractable concentrations of metals; on the other hand, Cd and Zn concentrations were increased in the extracted soil pore water solutions, in contrast to the two conventional amendments. Despite that, S-nZVI with sludge enhanced the quantity of microbial biomass in this soil. Additional earthworm avoidance data indicated that they generally avoided soil treated with all Fe-based materials, but the presence of sludge impacted their preferences somewhat. In summary, no significant differences between S-nZVI and iron grit were observed for metal(loid) immobilization, though sludge significantly improved the performance of S-nZVI in terms of soil health indicators. Therefore, this study indicates that S-nZVI amendment of soils alone should be avoided, though further field evidence from a broader range of soils is now required.
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Affiliation(s)
- Šárka Lewandowská
- Faculty of Environmental Sciences, Czech University of Life Sciences Prague, Kamýcká 129, 165 00, Prague - Suchdol, Czech Republic
| | - Zuzana Vaňková
- Faculty of Environmental Sciences, Czech University of Life Sciences Prague, Kamýcká 129, 165 00, Prague - Suchdol, Czech Republic
| | - Luke Beesley
- Faculty of Environmental Sciences, Czech University of Life Sciences Prague, Kamýcká 129, 165 00, Prague - Suchdol, Czech Republic; School of Science, Engineering and Environment, Peel Building, University of Salford, Manchester M5 4WT, UK
| | - Tomáš Cajthaml
- Institute of Microbiology of the Czech Academy of Sciences, Vídeňská 1083, 142 20 Prague 4, Czech Republic; Institute for Environmental Studies, Faculty of Science, Charles University in Prague, Benátská 2, 128 01 Prague 2, Czech Republic
| | - Niluka Wickramasinghe
- Faculty of Environmental Sciences, Czech University of Life Sciences Prague, Kamýcká 129, 165 00, Prague - Suchdol, Czech Republic
| | - Jiří Vojar
- Faculty of Environmental Sciences, Czech University of Life Sciences Prague, Kamýcká 129, 165 00, Prague - Suchdol, Czech Republic
| | - Martina Vítková
- Faculty of Environmental Sciences, Czech University of Life Sciences Prague, Kamýcká 129, 165 00, Prague - Suchdol, Czech Republic
| | - Daniel C W Tsang
- Department of Civil and Environmental Engineering, The Hong Kong University of Science and Technology, Clear Water Bay, Hong Kong, China
| | - Kuria Ndungu
- Norwegian Institute for Water Research (NIVA), Økernveien 94, NO-0579 Oslo, Norway
| | - Michael Komárek
- Faculty of Environmental Sciences, Czech University of Life Sciences Prague, Kamýcká 129, 165 00, Prague - Suchdol, Czech Republic.
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Xu Y, Liu H, Wen S, Guo J, Shi X, He Q, Lin W, Gao Y, Wang R, Xue W. High performance self-assembled sulfidized nanoscale zero-valent iron for the immobilization of cadmium in contaminated sediments: Optimization, microbial response, and mechanisms. JOURNAL OF HAZARDOUS MATERIALS 2024; 469:134022. [PMID: 38484662 DOI: 10.1016/j.jhazmat.2024.134022] [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: 12/05/2023] [Revised: 03/01/2024] [Accepted: 03/11/2024] [Indexed: 04/07/2024]
Abstract
Sulfidized nanoscale zero-valent iron (S-nZVI) showed excellent removal capacity for cadmium (Cd) in aqueous phase. However, the remediation effects of S-nZVI on Cd-contaminated sediment and its interactions with microorganisms in relation to Cd fate remain unclear. The complexity of the external environment posed a challenge for Cd remediation. This study synthesized S-nZVI with different S and Fe precursors to investigate the effect of precursors and applied the optimal material to immobilize Cd in sediments. Characterization analysis revealed that the precursor affected the morphology, Fe0 crystallinity, and the degree of oxidation of the material. Incubation experiments demonstrated that the immobilization efficiency of Cd using S-nZVIFe3++S2- (S/Fe = 0.14) reached the peak value of 99.54%. 1% and 5% dosages of S-nZVI significantly reduced Cd concentration in the overlying water, DTPA-extractable Cd content, and exchangeable (EX) Cd speciation (P < 0.05). Cd leaching in sediment and total iron in the overlying water remained at low levels during 90 d of incubation. Notably, each treatment maintained a high Cd immobilization efficiency under different pH, water/sediment ratio, organic acid, and coexisting ion conditions. Sediment physicochemical properties, functional bacteria, and a range of adsorption, complexation and precipitation of CdS effects dominated Cd immobilization.
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Affiliation(s)
- Yiqun Xu
- College of Environmental Science and Engineering, Yangzhou University, Yangzhou 225009, PR China
| | - Hongdou Liu
- College of Environmental Science and Engineering, Yangzhou University, Yangzhou 225009, PR China
| | - Siqi Wen
- College of Environmental Science and Engineering, Yangzhou University, Yangzhou 225009, PR China
| | - Jiaming Guo
- College of Environmental Science and Engineering, Yangzhou University, Yangzhou 225009, PR China
| | - Xiaoyu Shi
- College of Environmental Science and Engineering, Yangzhou University, Yangzhou 225009, PR China
| | - Qi He
- College of Environmental Science and Engineering, Yangzhou University, Yangzhou 225009, PR China
| | - Weilong Lin
- College of Environmental Science and Engineering, Yangzhou University, Yangzhou 225009, PR China
| | - Yang Gao
- School of Hydraulic and Environmental Engineering, Changsha University of Science & Technology, Changsha 410114, PR China
| | - Rongzhong Wang
- School of Resource & Environment and Safety Engineering, University of South China, Hengyang 421001, PR China
| | - Wenjing Xue
- College of Environmental Science and Engineering, Yangzhou University, Yangzhou 225009, PR China.
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Yang Y, Han T, Wang J. Ultrafast and highly efficient Cd(II) and Pb(II) removal by magnetic adsorbents derived from gypsum and corncob: Performances and mechanisms. ECOTOXICOLOGY AND ENVIRONMENTAL SAFETY 2024; 275:116265. [PMID: 38547730 DOI: 10.1016/j.ecoenv.2024.116265] [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: 01/11/2024] [Revised: 02/19/2024] [Accepted: 03/25/2024] [Indexed: 04/12/2024]
Abstract
The utilization of gypsum and biomass in environmental remediation has become a novel approach to promote waste recycling. Generally, raw waste materials exhibit limited adsorption capacity for heavy metal ions (HMIs) and often result in poor solid-liquid separation. In this study, through co-pyrolysis with corncob waste, titanium gypsum (TiG) was transformed into magnetic adsorbents (GCx, where x denotes the proportion of corncob in the gypsum-corncob mixture) for the removal of Cd(II) and Pb(II). GC10, the optimal adsorbent, which was composed primarily of anhydrite, calcium sulfide, and magnetic Fe3O4, exhibited significantly faster adsorption kinetics (rate constant k1 was 218 times and 9 times of raw TiG for Cd(II) and Pb(II)) and higher adsorption capacity (Qe exceeded 200 mg/g for Cd(II) and 400 mg/g for Pb(II)) than raw TiG and previous adsorbents. Cd(II) removal was more profoundly inhibited in a Cd(II) + Pb(II) binary system, suggesting that GC10 showed better selectivity for Pb(II). Moreover, GC10 could be easily separated from purified water for further recovery, due to its high saturation magnetization value (6.3 emu/g). The superior removal capabilities of GC10 were due to adsorption and surface precipitation of metal sulfides and metal sulfates on the adsorbent surface. Overall, these waste-derived magnetic adsorbents provide a novel and sustainable approach to waste recycling and the deep purification of multiple HMIs.
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Affiliation(s)
- Yuhong Yang
- School of Water Conservancy, Henan Key Laboratory of Water Environment Simulation and Treatment, North China University of Water Resources and Electric Power, Zhengzhou, Henan 450046, PR China
| | - Tongtong Han
- School of Water Conservancy, Henan Key Laboratory of Water Environment Simulation and Treatment, North China University of Water Resources and Electric Power, Zhengzhou, Henan 450046, PR China
| | - Jing Wang
- International Joint Laboratory of Henan Province for Environmental Functional Materials, Institute of Chemistry, Henan Academy of Sciences, Zhengzhou, Henan 450002, PR China.
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Zhao X, Xu H, Chen M, Chen Y, Kong X. Enhancement of norfloxacin degradation by citrate in S-nZVI@Ps system: Chelation and FeS layer. ENVIRONMENTAL RESEARCH 2024; 245:117981. [PMID: 38142729 DOI: 10.1016/j.envres.2023.117981] [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: 09/29/2023] [Revised: 12/02/2023] [Accepted: 12/16/2023] [Indexed: 12/26/2023]
Abstract
The degradation of organic pollution by sulfur-modified nano zero-valent iron(S-nZVI) combined with advanced oxidation systems has been extensively studied. However, the low utilization of nZVI and low reactive oxygen species (ROS) yield in the system have limited its wide application. Herein, a natural organic acid commonly found in citrus fruits, citric acid (CA), was combined with the conventional S-nZVI@Ps system to enhance the degradation of norfloxacin (NOR). The addition of CA increased the NOR removal by about 31% compared with the conventional S-nZVI@Ps system under the same experimental conditions. Among them, the enhanced effect of CA is mainly reflected in its ability to promote the release of Fe2+ and accelerate the cycling of Fe2+ and Fe3+ to further improve the utilization of nZVI and the generation of ROS; it also promotes the dissolution of the active substance (FeS) on the surface of S-nZVI to further improve the degradation rate of NOR. More importantly, the chelate of CA and Fe2+ (CA-Fe2+) had higher reactivity than alone Fe2+. Free radical quenching and electron spin resonance (ESR) experiments indicated that the main ROS for the degradation of NOR in the CA/S-nZVI@Ps system were SO4•- and OH•. CA-bound sulfur-modifying effects on NOR degradation was systematically investigated, and the degradation mechanism of NOR in CA/S-nZVI@Ps system was explored by various techniques. Additionally, the effect of common anions in water matrix on the degradation of NOR in CA/S-nZVI@Ps system and its degradation of various pollutants were also studied. This study provides a new perspective to enhance the degradation of pollutants by S-nZVI combined with advanced oxidation system, which can help to solve the application boundary problem of S-nZVI.
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Affiliation(s)
- Xuefang Zhao
- College of Petrochemical Technology, Lanzhou University of Technology, Lanzhou, 730050, China.
| | - Hui Xu
- College of Petrochemical Technology, Lanzhou University of Technology, Lanzhou, 730050, China.
| | - Minzhang Chen
- College of Petrochemical Technology, Lanzhou University of Technology, Lanzhou, 730050, China
| | - Yong Chen
- College of Petrochemical Technology, Lanzhou University of Technology, Lanzhou, 730050, China
| | - Xiuqing Kong
- College of Petrochemical Technology, Lanzhou University of Technology, Lanzhou, 730050, China.
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Yang K, Chi Y, Yang Y, Lou Z, Wang T, Wang D, Miao H, Xu X. Synergistic effect of novel pyrite/N-doped reduced graphene oxide composite with heterojunction structure for enhanced photo-assisted reduction of Cr(VI) in oxic water: Specific role of molecular oxygen. THE SCIENCE OF THE TOTAL ENVIRONMENT 2024; 907:168123. [PMID: 37884135 DOI: 10.1016/j.scitotenv.2023.168123] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/17/2023] [Revised: 10/05/2023] [Accepted: 10/23/2023] [Indexed: 10/28/2023]
Abstract
To avoid severe aggregation and synergistically utilize the intrinsic and photocatalytic reducibility, pyrite (FeS2) was loaded onto N-doped reduced graphene oxides (N-rGO) to fabricate a novel FeS2/N-rGO heterojunction catalyst for enhanced chromium (Cr(VI)) reduction in oxic condition to simultaneously investigate the specific effect and role of dissolved oxygen (DO). Characterization results showed that strong interaction and combination of FeS2 and N-rGO not only achieved the uniform distribution of FeS2, but also increased the defects, and exposed more functional groups. Meanwhile, the Type II heterojunction was formed in FeS2/N-rGO, which facilitated the separation efficiency of photo-generated carriers and electrons, endowing FeS2/N-rGO a superior photocatalytic activity. Cr(VI) was almost completely reduced via FeS2/N-rGO within 60 min under irradiation (Cr(VI) = 10 mg/L, dosage = 0.2 g/L), 3 times that of pristine FeS2 (18.7 %). Trapping and Electron Spin Resonance (ESR) experiments indicated that photo-generated e- and derived O2- species from photoactivation of dioxygen (DO) were the key reactive species for the enhancement of photo-assisted Cr(VI) reduction, rather than reductive Fe2+ and S22- species. Although the photocatalysis of FeS2/N-rGO cannot directly generate hydroxyl radicals (OH), the oxidative OH ascribed to superoxide radicals (O2-), photo-induced holes and free DO preferentially consumed by Fe2+ and S22- with stronger reducibility. Hence, as compared to the anoxic condition, the reduction rate of Cr(VI) was slightly decreased, but still could be totally removed within 60 min in the oxic conditions. Due to the excessive amount of FeS2/N-rGO, Cr(III) after reduction would not be influenced by oxidative species and maintain stability under oxic condition. This study provided a facile modification strategy for FeS2 based composites and uncovered its working mechanism for Cr(VI) decontamination.
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Affiliation(s)
- Kunlun Yang
- School of Environmental and Civil Engineering, Jiangnan University, Wuxi 214122, China; Suzhou Institute of Environmental Sciences, Postdoctoral Innovation and Practice Base of Jiangsu Province, Suzhou 21500, China
| | - Yanxiao Chi
- School of Environmental and Civil Engineering, Jiangnan University, Wuxi 214122, China
| | - Yuxuan Yang
- School of Environmental and Civil Engineering, Jiangnan University, Wuxi 214122, China
| | - Zimo Lou
- Collaborative Innovation Center of Yangtze River Delta Region Green Pharmaceuticals, Zhejiang University of Technology, Hangzhou 310014, China; College of Environment, Zhejiang University of Technology, Hangzhou 310014, China
| | - Tonghui Wang
- School of Environmental and Civil Engineering, Jiangnan University, Wuxi 214122, China
| | - Dengyang Wang
- School of Environmental and Civil Engineering, Jiangnan University, Wuxi 214122, China
| | - Hengfeng Miao
- School of Environmental and Civil Engineering, Jiangnan University, Wuxi 214122, China.
| | - Xinhua Xu
- Department of Environmental Engineering, College of Environmental and Resource Sciences, Zhejiang University, Hangzhou 310058, China
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Xue W, Li J, Chen X, Liu H, Wen S, Shi X, Guo J, Gao Y, Xu J, Xu Y. Recent advances in sulfidized nanoscale zero-valent iron materials for environmental remediation and challenges. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2023; 30:101933-101962. [PMID: 37659023 DOI: 10.1007/s11356-023-29564-9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/14/2023] [Accepted: 08/24/2023] [Indexed: 09/05/2023]
Abstract
Over the past decade, sulfidized nanoscale zero-valent iron (S-nZVI) has been developed as a promising tool for the remediation of contaminated soil, sediment, and water. Although most studies have focused on applying S-nZVI for clean-up purposes, there is still a lack of systematic summary and discussion from its synthesis, application, to toxicity assessment. This review firstly summarized and compared the properties of S-nZVI synthesized from one-step and two-step synthesis methods, and the modification protocols for obtaining better stability and reactivity. In the context of environmental remediation, this review outlined an update on the latest development of S-nZVI for removal of heavy metals, organic pollutants, antibiotic resistance genes (ARGs), and antibiotic resistant bacteria (ARB) and also discussed the underlying removal mechanisms. Environmental factors affecting the remediation performance of S-nZVI (e.g., humic acid, coexisting ions, S/Fe molar ratio, pH, and oxygen condition) were highlighted. Besides, the application potential of S-nZVI in advanced oxidation processes (AOP), especially in activating persulfate, was also evaluated. The toxicity impacts of S-nZVI on the environmental microorganism were described. Finally, the future challenges and remaining restrains to be resolved for better applicability of S-nZVI are also proposed. This review could provide guidance for the environmental remediation with S-nZVI-based technology from theoretical basis and practical perspectives.
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Affiliation(s)
- Wenjing Xue
- College of Environmental Science and Engineering, Yangzhou University, Yangzhou, 225009, China
| | - Jun Li
- College of Environmental Science and Engineering, Yangzhou University, Yangzhou, 225009, China
| | - Xinyu Chen
- College of Environmental Science and Engineering, Yangzhou University, Yangzhou, 225009, China
| | - Hongdou Liu
- College of Environmental Science and Engineering, Yangzhou University, Yangzhou, 225009, China
| | - Siqi Wen
- College of Environmental Science and Engineering, Yangzhou University, Yangzhou, 225009, China
| | - Xiaoyu Shi
- College of Environmental Science and Engineering, Yangzhou University, Yangzhou, 225009, China
| | - Jiaming Guo
- College of Environmental Science and Engineering, Yangzhou University, Yangzhou, 225009, China
| | - Yang Gao
- School of Hydraulic and Environmental Engineering, Changsha University of Science & Technology, Changsha, 410114, China
| | - Jian Xu
- College of Environmental Science and Engineering, Yangzhou University, Yangzhou, 225009, China
| | - Yiqun Xu
- College of Environmental Science and Engineering, Yangzhou University, Yangzhou, 225009, China.
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Xue C, Yi Y, Zhou L, Fang Z. Simultaneous remediation of co-contaminated soil by ball-milled zero-valent iron coupled with persulfate oxidation. JOURNAL OF ENVIRONMENTAL MANAGEMENT 2023; 340:118004. [PMID: 37119628 DOI: 10.1016/j.jenvman.2023.118004] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/18/2023] [Revised: 04/13/2023] [Accepted: 04/21/2023] [Indexed: 05/12/2023]
Abstract
The problem of co-contaminated soil at e-waste dismantling sites is serious and constitutes a critical threat to human health and the ecological environment. Zero-valent iron (ZVI) has been proven to be effective in the stabilization of heavy metals and the removal of halogenated organic compounds (HOCs) from soils. However, for the remediation of co-contamination of heavy metals with HOCs, ZVI has disadvantages such as high remediation cost and inability to take into account both pollutants, which limits its large-scale application. In this paper, boric acid and commercial zero-valent iron (cZVI) were used as raw materials to prepare boric acid-modified zero-valent iron (B-ZVIbm) through a high-energy ball milling strategy. B-ZVIbm coupled with persulfate (PS) to achieve simultaneous remediation of co-contaminated soil. The synergistic treatment of PS and B-ZVIbm resulted in the removal efficiency of 81.3% for decabromodiphenyl ether (BDE209) and the stabilization efficiencies of 96.5%, 99.8%, and 28.8% for Cu, Pb, and Cd respectively in the co-contaminated soil. A series of physical and chemical characterization methods showed that the oxide coat on the surface of B-ZVIbm could be replaced by borides during ball milling. The boride coat facilitated the exposure of the Fe0 core, promoted the corrosion of ZVI and the orderly release of Fe2+. The analysis of the morphological transformation of heavy metals in soils revealed that most of the heavy metals in the exchangeable, carbonate-bound state were transformed into the residue state, which was the key mechanism for the remediation of heavy metal-contaminated soils with B-ZVIbm. The analysis of BDE209 degradation products showed that BDE209 was degraded to lower brominated products and further mineralized by ZVI reduction and free radical oxidation. In general, B-ZVIbm coupled with PS is a good recipe for synergistic remediation of co-contaminated soils with heavy metals and HOCs.
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Affiliation(s)
- Chengjie Xue
- School of Environment, South China Normal University, Guangzhou, 510006, China
| | - Yunqiang Yi
- College of Resources and Environment, Zhongkai University of Agriculture and Engineering, Guangzhou, 510550, China
| | - Long Zhou
- School of Environment, South China Normal University, Guangzhou, 510006, China; Guangdong Technology Research Center for Ecological Management and Remediation of Water System, Guangzhou, 510006, China
| | - Zhanqiang Fang
- School of Environment, South China Normal University, Guangzhou, 510006, China; Guangdong Technology Research Center for Ecological Management and Remediation of Water System, Guangzhou, 510006, China.
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Zhang X, Chen R, Li Z, Yu J, Chen J, Zhang Y, Chen J, Yu Q, Qiu X. The influence of various microplastics on PBDEs contaminated soil remediation by nZVI and sulfide-nZVI: Impedance, electron-accepting/-donating capacity and aging. THE SCIENCE OF THE TOTAL ENVIRONMENT 2023; 880:163233. [PMID: 37019223 DOI: 10.1016/j.scitotenv.2023.163233] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/28/2022] [Revised: 03/13/2023] [Accepted: 03/29/2023] [Indexed: 05/27/2023]
Abstract
The microplastics (MPs) existed in the environment widely has resulted in novel thinking about in-situ remediation techniques, such as nano-zero-valent iron (nZVI) and sulfided nZVI (S-nZVI), which were often compromised by various environmental factors. In this study, three common MPs such as polyvinyl chloride (PVC), polystyrene (PS), and polypropylene (PP) in soil were found to inhibit the degradation rate of decabromodiphenyl ether (BDE209) by nZVI and S-nZVI to different degrees due to MPs inhibiting of electron transfer which is the main way to degrade BDE209. The inhibition strength was related to its impedance (Z) and electron-accepting (EAC)/-donating capacity (EDC). Based on the explanation of the inhibition mechanism, the reason for different aging degrees of nZVI and S-nZVI in different MPs was illustrated, especially in PVC systems. Furthermore, the aging of reacted MPs, functionalization and fragmentation in particular, indicated that they were involved in the degradation process. Moreover, this work provided new insights into the field application of nZVI-based materials for removing persistent organic pollutants (POPs).
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Affiliation(s)
- Xiaoxuan Zhang
- School of Chemistry and Environmental Engineering, Wuhan Institute of Technology, Wuhan 430205, China
| | - Ran Chen
- School of Chemistry and Environmental Engineering, Wuhan Institute of Technology, Wuhan 430205, China
| | - Zhenhui Li
- School of Chemistry and Environmental Engineering, Wuhan Institute of Technology, Wuhan 430205, China
| | - Junxia Yu
- School of Chemistry and Environmental Engineering, Wuhan Institute of Technology, Wuhan 430205, China
| | - Jinyi Chen
- School of Chemistry and Environmental Engineering, Wuhan Institute of Technology, Wuhan 430205, China
| | - Yuanyuan Zhang
- School of Chemistry and Environmental Engineering, Wuhan Institute of Technology, Wuhan 430205, China
| | - Jinhong Chen
- Hainan Provincial Ecological and Environmental Monitoring Centre, Hainan, China
| | - Qianqian Yu
- School of Earth Science, China University of Geosciences, Wuhan 430074, China
| | - Xinhong Qiu
- School of Chemistry and Environmental Engineering, Wuhan Institute of Technology, Wuhan 430205, China; Key Laboratory of Novel Biomass-Based Environmental and Energy Materials in Petroleum and Chemical Industry, Wuhan 430074, China; Hubei Engineering Technology Research Center for Chemical Industry Pollution Control, Wuhan 430205, China.
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Chen Y, Lin Q, Wen X, He J, Luo H, Zhong Q, Wu L, Li J. Simultaneous adsorption of As(III) and Pb(II) by the iron-sulfur codoped biochar composite: Competitive and synergistic effects. J Environ Sci (China) 2023; 125:14-25. [PMID: 36375900 DOI: 10.1016/j.jes.2022.01.023] [Citation(s) in RCA: 6] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/11/2021] [Revised: 01/13/2022] [Accepted: 01/13/2022] [Indexed: 06/16/2023]
Abstract
Simultaneous elimination of As(III) and Pb(II) from wastewater is still a great challenge. In this work, an iron-sulfur codoped biochar (Fe/S-BC) was successfully fabricated in a simplified way and was applied to the remediate the co-pollution of As(III) and Pb(II). The positive enthalpy indicated that the adsorption in As-Pb co-pollution was an endothermic reaction. The mechanism of As(III) removal could be illustrated by surface complexation, oxidation and precipitation. In addition to precipitation and complexation, the elimination mechanism of Pb(II) also contained ion exchange and electrostatic interactions. Competitive and synergistic effects existed simultaneously in the co-contamination system. The suppression of As(III) was ascribed to competitive complexation of the two metals on Fe/S-BC, while the synergy of Pb(II) was attributed to the formation of the PbFe2(AsO4)2(OH)2. Batch experiments revealed that Fe/S-BC had outstanding ability to remove As(III) and Pb(II), regardless of pH dependency and interference by various coexisting ions. The maximum adsorption capacities of the Fe/S-BC for As(III) and Pb(II) were 91.2 mg/g and 631.7 mg/g, respectively. Fe/S-BC could be treated as a novel candidate for the elimination of As(III)-Pb(II) combined pollution.
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Affiliation(s)
- Yijun Chen
- Guangdong Industrial Contaminated Site Remediation Technology and Equipment, Engineering Research Center, School of Environmental Science and Engineering, Guangdong University of Technology, Guangzhou 510006, China
| | - Qintie Lin
- Guangdong Industrial Contaminated Site Remediation Technology and Equipment, Engineering Research Center, School of Environmental Science and Engineering, Guangdong University of Technology, Guangzhou 510006, China.
| | - Xiaoqing Wen
- Guangdong Industrial Contaminated Site Remediation Technology and Equipment, Engineering Research Center, School of Environmental Science and Engineering, Guangdong University of Technology, Guangzhou 510006, China
| | - Jin He
- Guangdong Industrial Contaminated Site Remediation Technology and Equipment, Engineering Research Center, School of Environmental Science and Engineering, Guangdong University of Technology, Guangzhou 510006, China
| | - Haoyu Luo
- Key Lab of Pollution Control and Ecosystem Restoration in Industry Clusters, Ministry of Education; School of Environment and Energy, South China University of Technology, Guangzhou 510006, China
| | - Quanfa Zhong
- Key Laboratory for City Cluster Environmental Safety and Green Development of the Ministry of Education, Institute of Environmental and Ecological Engineering, Guangdong University of Technology, Guangzhou 510006, China
| | - Libin Wu
- Guangdong Industrial Contaminated Site Remediation Technology and Equipment, Engineering Research Center, School of Environmental Science and Engineering, Guangdong University of Technology, Guangzhou 510006, China
| | - Jiaqi Li
- Guangdong Industrial Contaminated Site Remediation Technology and Equipment, Engineering Research Center, School of Environmental Science and Engineering, Guangdong University of Technology, Guangzhou 510006, China
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Sun X, Huang W, Xu H, Qu Z, Wu J, Yan N. Insight into H2S Production from CS2 Hydrolysis for Heavy Metals Treatment: In-situ FT-IR and DFT Studies over Crystalline Phase-dependent ZrO2. Sep Purif Technol 2023. [DOI: 10.1016/j.seppur.2023.123194] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/18/2023]
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Zhang J, Yu H, Xu W, Shi H, Hu X, Xu J, Lou L. Adsorption-reduction coupling mechanism and reductive species during efficient florfenicol removal by modified biochar supported sulfidized nanoscale zerovalent iron. ENVIRONMENTAL RESEARCH 2023; 216:114782. [PMID: 36395864 DOI: 10.1016/j.envres.2022.114782] [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: 09/23/2022] [Revised: 10/27/2022] [Accepted: 11/09/2022] [Indexed: 06/16/2023]
Abstract
Sulfidized nanoscale zerovalent iron (S-nZVI) was a promising material for degrading halogenated contaminants, but the easy aggregation limits its application for in-situ groundwater remediation. Hence, S-nZVI was decorated onto modified biochar (mBC) to obtain better dispersity and reactivity with florfenicol (FF), a widely used antibiotic. Uniform dispersion of S-nZVI particles were achieved on the mBC with plentiful oxygen-containing functional groups and negative surface charge. Thus, the removal rate of FF by S-nZVI@mBC was 2.5 and 3.1 times higher than that by S-nZVI and S-nZVI@BC, respectively. Adsorption and dechlorination of FF showed synergistic effect under appropriate mBC addition (e.g., C/Fe mass ratio = 1:3, 1:1), probably due to the enrichment of FF facilitates its reduction. In contrast, the contact between FF and S-nZVI could be hindered under more mBC addition, significantly decrease the reduction rate of FF and the reduction capacity of per unit Fe0. In addition, sulfur dose altered the surface species of surface Fe and S, and removal rates of FF correlated well with surface reductive species, i.e., FeS (r = 0.90, p < 0.05) and Fe0 (r = 0.98, p < 0.01). These mechanistic insights indicate the importance of rational design for biochar supported S-nZVI, which can lead to more efficient FF degradation.
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Affiliation(s)
- Jin Zhang
- Department of Environmental Engineering, Zhejiang University, Hangzhou 310029, China
| | - Hao Yu
- Department of Environmental Engineering, Zhejiang University, Hangzhou 310029, China
| | - Weijian Xu
- Department of Environmental Engineering, Zhejiang University, Hangzhou 310029, China
| | - Hongyu Shi
- Department of Environmental Engineering, Zhejiang University, Hangzhou 310029, China
| | - Xiaohong Hu
- Department of Environmental Engineering, Zhejiang University, Hangzhou 310029, China
| | - Jiang Xu
- Department of Environmental Engineering, Zhejiang University, Hangzhou 310029, China
| | - Liping Lou
- Department of Environmental Engineering, Zhejiang University, Hangzhou 310029, China; Key Laboratory of Water Pollution Control and Environmental Safety of Zhejiang Province, Hangzhou 310020, China.
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12
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Xu W, Zhang J, Xu T, Hu X, Shen C, Lou L. Could sulfidation enhance the long-term performance of nano-zero valent iron in the peroxymonosulfate activation to degrade 2-chlorobiphenyl? ENVIRONMENTAL POLLUTION (BARKING, ESSEX : 1987) 2023; 316:120631. [PMID: 36370971 DOI: 10.1016/j.envpol.2022.120631] [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: 09/21/2022] [Revised: 11/07/2022] [Accepted: 11/08/2022] [Indexed: 06/16/2023]
Abstract
Sulfidation can enhance the hydrophobicity of nano-zero valent iron (nZVI) and improve its long-term degradation performance in reduction technology. However, whether sulfidation can enhance its long-term performance in sulfate radical-based advanced oxidation processes hasn't been systematically studied. Herein sulfide-modified nZVI (S-nZVI) was prepared by different sulfidation methods and S/Fe ratios. The behavior of S-nZVI on the peroxymonosulfatec (PMS) activation to degrade 2-chlorobiphenyl for continuous 5 rounds was investigated. The results showed that sulfidation couldn't always promote the long-term degradation performance. S-nZVI prepared by one-step sulfidation method with high S/Fe ratio (S-nZVIonestep-7%, S-nZVIonestep-14%) exhibited inferior degradation performance than unmodified nZVI (52.2%). This was because that the electron donor Fe0 was consumed rapidly and the crystalline lepidocrocite accumulated on the surface, thus inhibited PMS activation. In contrast, S-nZVI prepared by post-sulfidation method with high S/Fe ratio (S-nZVIpost-7%, S-nZVIpost-14%) exhibited more Fe0 residual, less FeOx accumulation, and more catalytic Fe2+ regeneration. Consequently, S-nZVIpost exhibited superior degradation capacity (69.3%). Moreover, the radical quenching experiments revealed that the primary free radicals involved in the degradation were transformed from SO4•- to •OH with prolongation of the degradation. Additionally, Fe (IV) contributed to the degradation through non-radical mechanism, especially in the S-nZVIpost-7%/PMS system.
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Affiliation(s)
- Weijian Xu
- Department of Environmental Engineering, Zhejiang University, Hangzhou, 310029, People's Republic of China; Department of Civil and Environmental Engineering, The Hong Kong Polytechnic University, Hung Hom, Kowloon, Hong Kong, China
| | - Jin Zhang
- Department of Environmental Engineering, Zhejiang University, Hangzhou, 310029, People's Republic of China
| | - Tao Xu
- Hangzhou Zetian Chunlai Technology Co., Ltd., Hangzhou, People's Republic of China
| | - Xinyi Hu
- Department of Environmental Engineering, Zhejiang University, Hangzhou, 310029, People's Republic of China
| | - Chaofeng Shen
- Department of Environmental Engineering, Zhejiang University, Hangzhou, 310029, People's Republic of China; Key Laboratory of Water Pollution Control and Environmental Safety of Zhejiang Province, 310020, People's Republic of China
| | - Liping Lou
- Department of Environmental Engineering, Zhejiang University, Hangzhou, 310029, People's Republic of China; Key Laboratory of Water Pollution Control and Environmental Safety of Zhejiang Province, 310020, People's Republic of China.
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13
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Khan R, Saxena A. Potentially toxic elements (PTEs) in Gomti-Ganga Alluvial Plain, associated human health risks assessment and potential remediation using novel-nanomaterials. ENVIRONMENTAL MONITORING AND ASSESSMENT 2022; 195:19. [PMID: 36279024 PMCID: PMC9589610 DOI: 10.1007/s10661-022-10562-2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 11/24/2021] [Accepted: 01/22/2022] [Indexed: 06/16/2023]
Abstract
The health risks associated with consumption of water from river Gomti polluted with potentially toxic elements (PTEs), including As, Fe, Pb, Cd, Mn, Cr, Ni, and Hg were investigated at the initiation of unlocking of COVID-19 lockdown and compared with pre-COVID-19 lockdown status. In the current investigation, the total hazard index (THI) values exceeded the acceptable limit of "unity" at all sampling stations. The use of river water for drinking and domestic purposes by millions of people with high THI values has emerged as a matter of huge concern. The individual hazard quotients associated with Cd and Pb were found to be most severe (> 1). A vivid difference between the THI values during the two study phases indicated the positive impact of COVID-19 lockdown signifying the prominent impact of anthropogenic activities on the PTE concentrations. The closure of local manufacturing units (textile, battery, etc.) emerged as a potential reason for decreased health risks associated with PTE levels. The higher susceptibility of children to health risks in comparison with adults through the values of THI and HQs was interpreted across the study area. Potential remedial measures for PTE contamination have also been suggested in the study.
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Affiliation(s)
- Ramsha Khan
- Faculty of Civil Engineering, Institute of Technology, Shri Ramswaroop Memorial University, Barabanki, India.
| | - Abhishek Saxena
- Faculty of Civil Engineering, Institute of Technology, Shri Ramswaroop Memorial University, Barabanki, India.
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14
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Zhao R, Cao X, Li T, Cui X, Cui Z. Co-Removal Effect and Mechanism of Cr(VI) and Cd(II) by Biochar-Supported Sulfide-Modified Nanoscale Zero-Valent Iron in a Binary System. MOLECULES (BASEL, SWITZERLAND) 2022; 27:molecules27154742. [PMID: 35897924 PMCID: PMC9331559 DOI: 10.3390/molecules27154742] [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: 07/04/2022] [Revised: 07/19/2022] [Accepted: 07/21/2022] [Indexed: 11/16/2022]
Abstract
This study aimed to explore the co-removal effect and mechanism of Cr(VI) and Cd(II) with an optimized synthetic material. The toxicity and accumulation characteristics of Cr(VI) and Cd(II) encountered in wastewater treatment areas present significant challenges. In this work, a rational assembly of sulfide-modified nanoscale zero-valent iron (SnZVI) was introduced into a biochar (BC), and a Cr(VI)–Cd(II) binary system adsorbent with high efficiency was synthesized. When the preparation temperature of the BC was 600 °C, the molar ratio of S/Fe was 0.3, the mass ratio of BC/SnZVI was 1, and the best adsorption capacities of BC-SnZVI for Cr(VI) and Cd(II) in the binary system were 58.87 mg/g and 32.55 mg/g, respectively. In addition, the adsorption mechanism of BC-SnZVI on the Cr(VI)-Cd(II) binary system was revealed in depth by co-removal experiments, indicating that the coexistence of Cd(II) could promote the removal of Cr(VI) by 9.20%, while the coexistence of Cr(VI) could inhibit the removal of Cd(II) by 43.47%. This work provides a new pathway for the adsorption of Cr(VI) and Cd(II) in binary systems, suggesting that BC-SnZVI shows great potential for the co-removal of Cr(VI) and Cd(II) in wastewater.
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Affiliation(s)
- Rui Zhao
- School of Environmental Science and Engineering, Shandong University, 72 Binhai Road, Jimo District, Qingdao 266237, China; (R.Z.); (X.C.); (T.L.)
| | - Xiufeng Cao
- School of Environmental Science and Engineering, Shandong University, 72 Binhai Road, Jimo District, Qingdao 266237, China; (R.Z.); (X.C.); (T.L.)
- School of Municipal and Environmental Engineering, Shandong Jianzhu University, 1000 Fengming Road, Lingang Development Zone, Jinan 250101, China;
| | - Tao Li
- School of Environmental Science and Engineering, Shandong University, 72 Binhai Road, Jimo District, Qingdao 266237, China; (R.Z.); (X.C.); (T.L.)
| | - Xiaowei Cui
- School of Municipal and Environmental Engineering, Shandong Jianzhu University, 1000 Fengming Road, Lingang Development Zone, Jinan 250101, China;
| | - Zhaojie Cui
- School of Environmental Science and Engineering, Shandong University, 72 Binhai Road, Jimo District, Qingdao 266237, China; (R.Z.); (X.C.); (T.L.)
- Correspondence:
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15
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Xu R, Li Q, Yang Y, Jin S, Liao L, Wu Z, Yin Z, Xu B, Nan X, He Y, Zhu B, Jiang T. Removal of heavy metal(loid)s from aqueous solution by biogenic FeS-kaolin composite: Behaviors and mechanisms. CHEMOSPHERE 2022; 299:134382. [PMID: 35318021 DOI: 10.1016/j.chemosphere.2022.134382] [Citation(s) in RCA: 11] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/20/2021] [Revised: 02/28/2022] [Accepted: 03/18/2022] [Indexed: 05/16/2023]
Abstract
In this work, a green adsorbent, biogenic FeS-kaolin composite (KL-FeS) was synthesized by sulfate-reducing bacteria (SRB) mediation, and its potential for Cd(II), Pb(II), Cu(II), Zn(II), As(III) and Sb(III) removal was evaluated. Among prepared composites, the KL-FeS synthesized at a concentration of 2 g/L kaolin performed a better removal efficiency on heavy metal(loid)s and the adsorption results followed the pseudo-second-order and Redlich-Peterson models, indicating that the adsorption was a hybrid chemical reaction-adsorption process. Additionally, the maximum adsorption capacities of Cd(II), Pb(II), Cu(II), Zn(II), As(III) and Sb(III) on KL-FeS in monocomponent system were 71.71, 133.54, 51.90, 54.41, 38.71 and 96.38 mg/g, respectively (pH = 5.0 ± 0.1, T = 25 °C). In addition, the increase of pH and ionic strength promoted the adsorption capacities of KL-FeS for metal-(loid)s. Moreover, FTIR, XPS and XRD analyses supported that surface complexation, hydrogen bonding, ion exchange, electrostatic interaction and chemical precipitation were predominately mechanisms involved in the adsorption process. Furthermore, KL-FeS displayed higher affinity for Pb(II), Sb(III) and Cu(II) in the multi-component system. This work highlighted the potential of biogenic FeS-kaolin composite for simultaneous removal of multiple heavy metal(loid)s under aerobic conditions.
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Affiliation(s)
- Rui Xu
- School of Minerals Processing and Bioengineering, Central South University, Changsha, 410083, China
| | - Qian Li
- School of Minerals Processing and Bioengineering, Central South University, Changsha, 410083, China.
| | - Yongbin Yang
- School of Minerals Processing and Bioengineering, Central South University, Changsha, 410083, China
| | - Shengming Jin
- School of Minerals Processing and Bioengineering, Central South University, Changsha, 410083, China
| | - Lang Liao
- School of Minerals Processing and Bioengineering, Central South University, Changsha, 410083, China
| | - Zhenguo Wu
- School of Minerals Processing and Bioengineering, Central South University, Changsha, 410083, China
| | - Zhe Yin
- School of Minerals Processing and Bioengineering, Central South University, Changsha, 410083, China
| | - Bin Xu
- School of Minerals Processing and Bioengineering, Central South University, Changsha, 410083, China
| | - Xiaolong Nan
- 306 Bridge of Hunan Nuclear Geology, Changsha, 410083, China
| | - Youyu He
- 306 Bridge of Hunan Nuclear Geology, Changsha, 410083, China
| | - Bing Zhu
- 306 Bridge of Hunan Nuclear Geology, Changsha, 410083, China
| | - Tao Jiang
- School of Minerals Processing and Bioengineering, Central South University, Changsha, 410083, China
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16
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Song Y, Tang H, Yan Y, Guo Y, Wang H, Bian Z. Combining electrokinetic treatment with modified zero-valent iron nanoparticles for rapid and thorough dechlorination of trichloroethene. CHEMOSPHERE 2022; 292:133443. [PMID: 34973257 DOI: 10.1016/j.chemosphere.2021.133443] [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: 11/16/2021] [Revised: 12/22/2021] [Accepted: 12/23/2021] [Indexed: 06/14/2023]
Abstract
In situ injection of nanoscale zero-valent iron (nZVI) slurry is a promising method to treat chlorinated solvents represented by trichloroethylene (TCE) in groundwater. In this study, the effects of sulfidation and emulsification treatment on the performance of nZVI reductive dechlorination of TCE under enhancement by an external electric field were evaluated. The hydrophobic oil film on the surface of sulfidized and emulsified zero-valent iron (S-EZVI) can sequestrate more than one-fifth of the unreacted TCE in the early stage of the experiment (at 5 min). The FeS layer formed on the surface of S-EZVI can facilitate the electron-transfer process and reduce the degree of corrosion of Fe0 with water by 94.0%. Electric-field-enhanced S-EZVI technology can remove more than 93.1% of TCE in the pH range 6.0-9.0, and the performances in overly acid and overly alkali environments both improved. Under the optimal conditions, the TCE removal rate and reaction constant of the applied electric field group reached 96.7% and 1.6 × 10-2 L g-1 min-1, respectively, which were much higher than those of the group without an electric field (53.2% and 3.3 × 10-3 L g-1 min-1) owing to rapid concurrent hydrogenolysis of dichloroethenes and vinyl chloride, or another transformation pathway, such as direct oxidation by the anode. Thereby, this method avoids accumulation of chlorinated intermediates, especially toxic vinyl chloride. This work shows that combination technology has many characteristics that are favorable for field application, and it is expected to provide a new reference and have application value for development of in situ efficient and thorough treatment of TCE-contaminated groundwater.
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Affiliation(s)
- Yuchao Song
- College of Environmental Science and Engineering, Beijing Forestry University, Beijing, 100083, PR China
| | - Hanyu Tang
- College of Water Sciences, Beijing Normal University, Beijing, 100875, PR China
| | - Yanjun Yan
- College of Environmental Science and Engineering, Beijing Forestry University, Beijing, 100083, PR China
| | - Yajie Guo
- College of Environmental Science and Engineering, Beijing Forestry University, Beijing, 100083, PR China
| | - Hui Wang
- College of Environmental Science and Engineering, Beijing Forestry University, Beijing, 100083, PR China.
| | - Zhaoyong Bian
- College of Water Sciences, Beijing Normal University, Beijing, 100875, PR China.
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17
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Li W, Liang L, Li Y, Tian Y, Chen J, Chen S, Zhang J. Individual effects of different co-existing ions and polystyrene (PS) microplastics on the reactivity of sulfidated nanoscale zero-valent iron (S-nZVI) toward EDTA-chelated CdII removal. Sep Purif Technol 2022. [DOI: 10.1016/j.seppur.2021.120374] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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18
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Wu L, Lin Q, Fu H, Luo H, Zhong Q, Li J, Chen Y. Role of sulfide-modified nanoscale zero-valent iron on carbon nanotubes in nonradical activation of peroxydisulfate. JOURNAL OF HAZARDOUS MATERIALS 2022; 422:126949. [PMID: 34523474 DOI: 10.1016/j.jhazmat.2021.126949] [Citation(s) in RCA: 29] [Impact Index Per Article: 14.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/09/2021] [Revised: 08/06/2021] [Accepted: 08/16/2021] [Indexed: 06/13/2023]
Abstract
Sulfamethoxazole (SMX) is highly persistent and difficult to remove, making it urgent to find an efficient method for alleviating the enormous environmental pressure of SMX. In this study, sulfide-modified nanoscale zero-valent iron on carbon nanotubes (S-nZVI@CNTs) was prepared to activate peroxydisulfate (PDS) for the degradation of SMX. The results showed that SMX was completely removed within 40 min (kobs=0.1058 min-1) in the S-nZVI@CNTs/PDS system. By analyzing quenching experiments and electron paramagnetic resonance (EPR), singlet oxygen (1O2) was the main active species of the S-nZVI@CNTs/PDS system. 1O2 might be mediated by the abundant carbonyl groups (CO) on carbon nanotubes through spectroscopic analyses. In addition, sulfur doping transitioned the activation pathway to a nonradical pathway. Spectroscopic analyses and electrochemical experiments confirmed that the formation of CNTs-PDS complexes and S-nZVI could promote electron transfer on the catalyst surface. Furthermore, the main degradation intermediates of SMX were identified, and five possible transformation pathways were proposed. The S-nZVI@CNTs/PDS system possessed advantages including high anti-interference (Cl-, NO3-, HA), a strong applicability, recyclability and a low PDS consumption, offering new insight into the degradation of antibiotic wastewater.
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Affiliation(s)
- Libin Wu
- Guangdong Industrial Contaminated Site Remediation Technology and Equipment, Engineering Research Center, School of Environmental Science and Engineering, Guangdong University of Technology, Guangzhou 510006, China
| | - Qintie Lin
- Guangdong Industrial Contaminated Site Remediation Technology and Equipment, Engineering Research Center, School of Environmental Science and Engineering, Guangdong University of Technology, Guangzhou 510006, China.
| | - Hengyi Fu
- Guangdong Industrial Contaminated Site Remediation Technology and Equipment, Engineering Research Center, School of Environmental Science and Engineering, Guangdong University of Technology, Guangzhou 510006, China
| | - Haoyu Luo
- Key Laboratory of Ministry of Education on Pollution Control and Ecosystem Restoration in Industry Clusters, Guangdong Provincial Key Laboratory of Solid Wastes Pollution Control and Recycling, School of Environment and Energy, South China University of Technology, Guangzhou 510006, China
| | - Quanfa Zhong
- Guangdong Industrial Contaminated Site Remediation Technology and Equipment, Engineering Research Center, School of Environmental Science and Engineering, Guangdong University of Technology, Guangzhou 510006, China
| | - Jiaqi Li
- Guangdong Industrial Contaminated Site Remediation Technology and Equipment, Engineering Research Center, School of Environmental Science and Engineering, Guangdong University of Technology, Guangzhou 510006, China
| | - Yijun Chen
- Guangdong Industrial Contaminated Site Remediation Technology and Equipment, Engineering Research Center, School of Environmental Science and Engineering, Guangdong University of Technology, Guangzhou 510006, China
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19
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Yang S, Liu A, Liu J, Liu Z, Zhang W. Advance of Sulfidated Nanoscale Zero-Valent Iron: Synthesis, Properties and Environmental Application. ACTA CHIMICA SINICA 2022. [DOI: 10.6023/a22080345] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
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20
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Yang D, Yang S, Yuan H, Wang F, Wang H, Xu J, Liu X. Co-benefits of biochar-supported nanoscale zero-valent iron in simultaneously stabilizing soil heavy metals and reducing their bioaccessibility. JOURNAL OF HAZARDOUS MATERIALS 2021; 418:126292. [PMID: 34118546 DOI: 10.1016/j.jhazmat.2021.126292] [Citation(s) in RCA: 19] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/23/2021] [Revised: 05/20/2021] [Accepted: 05/31/2021] [Indexed: 06/12/2023]
Abstract
We investigated the performance and encapsulation mechanisms of novel biochar-supported nanoscale zero-valent iron (nZVI-BC) used for the remediation of soil co-contaminated with arsenic (As), cadmium (Cd), and lead (Pb) via incubation and column experiments. Compared with the control, 0.50% of nZVI-BC significantly decreased the leakage of As, Cd, and Pb by 97.94-98.45%, 42.86-81.12%, and 82.14-92.49%, respectively. In addition, 0.50% of nZVI-BC could transform the fraction of unstable heavy metals into a stable form, which substantially decreased the availability, leachability, and bioaccessibility of the heavy metals and hence greatly reduced the human health exposure risk. Column experiments showed that 0.50% of nZVI-BC effectively restrained the leaching of As, Cd, and Pb by 95.60-99.84%, 70.82-84.18%, and 91.68-99.81%, respectively. The predominant encapsulation mechanisms of nZVI-BC included complexation, precipitation/co-precipitation, reduction, and the formation of ternary surface complexes. Based on these insights, we can devise new strategies for the remediation of soil co-contaminated with As, Cd, and Pb.
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Affiliation(s)
- Dong Yang
- College of Environmental & Resource Sciences, Zhejiang Provincial Key Laboratory of Agricultural Resources and Environment, Zhejiang University, Hangzhou 310058, China
| | - Shiyan Yang
- College of Environmental & Resource Sciences, Zhejiang Provincial Key Laboratory of Agricultural Resources and Environment, Zhejiang University, Hangzhou 310058, China
| | - Honghong Yuan
- College of Environmental & Resource Sciences, Zhejiang Provincial Key Laboratory of Agricultural Resources and Environment, Zhejiang University, Hangzhou 310058, China
| | - Fan Wang
- College of Life & Environmental Sciences, Hangzhou Normal University, Hangzhou 310036, China
| | - Hailong Wang
- Biochar Engineering Technology Research Center of Guangdong Province, School of Environmental and Chemical Engineering, Foshan University, Foshan, Guangdong 528000, China; Key Laboratory of Soil Contamination Bioremediation of Zhejiang Province, Zhejiang A&F University, Hangzhou, Zhejiang 311300, China
| | - Jianming Xu
- College of Environmental & Resource Sciences, Zhejiang Provincial Key Laboratory of Agricultural Resources and Environment, Zhejiang University, Hangzhou 310058, China
| | - Xingmei Liu
- College of Environmental & Resource Sciences, Zhejiang Provincial Key Laboratory of Agricultural Resources and Environment, Zhejiang University, Hangzhou 310058, China.
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21
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Xu H, Gao M, Hu X, Chen Y, Li Y, Xu X, Zhang R, Yang X, Tang C, Hu X. A novel preparation of S-nZVI and its high efficient removal of Cr(VI) in aqueous solution. JOURNAL OF HAZARDOUS MATERIALS 2021; 416:125924. [PMID: 34492856 DOI: 10.1016/j.jhazmat.2021.125924] [Citation(s) in RCA: 45] [Impact Index Per Article: 15.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/25/2021] [Revised: 04/15/2021] [Accepted: 04/16/2021] [Indexed: 06/13/2023]
Abstract
The chitosan-stabilized biochar supported S-nZVI (CS@BC/S-nZVI) composite with low aggregation and superior antioxidation were successfully synthesized by liquid-phase reduction method for the outstanding removal of Cr(VI) from wastewater and characterized by SEM, BET, FTIR, XRD, and XPS. The optimized synthesis parameters of CS@BC/S-nZVI were determined as a 0.14 molar ratio of S/Fe and a 0.25 mass ratio of BC/Fe. The CS@BC/S-nZVI possessed a specific surface area of 199.246 m2/g and an average pore size and pore volume of 1.186 nm and 0.272 cc/g. The CS@BC/S-nZVI could remain reductive activity after Cr(VI) removal and present a remarkable tolerance to the coexisting ions during Cr(VI) removal. The adsorption data were fitted well by the pseudo-second order model and the Langmuir model. The removal of Cr(VI) by CS@BC/S-nZVI was an exothermic process with prominent Cr(VI) removal capacities of 244.07 mg/g at 120 min and 221.84 mg/g at 15 min at 25 ℃. Further mechanism analysis proved that the binding of Cr(VI) to CS@BC/S-nZVI was mainly a synergistic effect of reduction and electrostatic attraction. Overall, these findings shed new light on the research of a novel S-nZVI compound and revealed the potential practical application of CS@BC/S-nZVI in the future heavy metal removal from wastewater.
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Affiliation(s)
- Hao Xu
- College of Environmental Science and Engineering, Central South University of Forestry and Technology, Changsha 410004, China
| | - Mengxi Gao
- College of Environmental Science and Engineering, Central South University of Forestry and Technology, Changsha 410004, China
| | - Xi Hu
- College of Environmental Science and Engineering, Central South University of Forestry and Technology, Changsha 410004, China
| | - Yonghua Chen
- College of Environmental Science and Engineering, Central South University of Forestry and Technology, Changsha 410004, China
| | - Yan Li
- College of Environmental Science and Engineering, Central South University of Forestry and Technology, Changsha 410004, China
| | - Xinyu Xu
- College of Environmental Science and Engineering, Central South University of Forestry and Technology, Changsha 410004, China
| | - Riqing Zhang
- College of Forestry, Central South University of Forestry and Technology, Changsha 410004, China
| | - Xiong Yang
- College of Environmental Science and Engineering, Central South University of Forestry and Technology, Changsha 410004, China
| | - Chunfang Tang
- College of Environmental Science and Engineering, Central South University of Forestry and Technology, Changsha 410004, China.
| | - Xinjiang Hu
- College of Environmental Science and Engineering, Central South University of Forestry and Technology, Changsha 410004, China.
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22
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Ahmed T, Noman M, Manzoor N, Shahid M, Abdullah M, Ali L, Wang G, Hashem A, Al-Arjani ABF, Alqarawi AA, Abd Allah EF, Li B. Nanoparticle-based amelioration of drought stress and cadmium toxicity in rice via triggering the stress responsive genetic mechanisms and nutrient acquisition. ECOTOXICOLOGY AND ENVIRONMENTAL SAFETY 2021; 209:111829. [PMID: 33383335 DOI: 10.1016/j.ecoenv.2020.111829] [Citation(s) in RCA: 50] [Impact Index Per Article: 16.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/28/2020] [Revised: 11/23/2020] [Accepted: 12/17/2020] [Indexed: 05/20/2023]
Abstract
Cadmium and drought are the most destructive of the abiotic stresses with negative consequences in terms of impaired metabolism, restricted nutrient use efficiency and disruptive photosynthesis of plants. The present study investigated the mitigation strategy of both aforementioned stresses by the application of iron oxide (IONPs) and hydrogel nanoparticles (HGNPs) simultaneously probably for the first time. IONPs were biofabricated by using a locally identified Bacillus strain RNT1, while HGNPs were produced chemically followed by the confirmation and characterization of both NPs through nanomaterials characterization techniques. Results of FTIR and XRD showed the capping of NPs by different functional groups together with their crystalline structure, respectively. SEM and TEM analysis showed the spherical shape along with the particle size ranging from 18 to 94 nm of both NPs, while EDS analysis confirmed the elemental purity of NPs. The results revealed that IONPs-treated rice plants increased biomass, antioxidant enzyme contents, photosynthesis efficiency, nutrient acquisition together with the decrease in reactive oxygen species and acropetal Cd translocation under normal and drought stress conditions as compared with control plants. Furthermore, the expression of the Cd transporter genes, OsHMA2, OsHMA3 and OsLCT1 were curtailed in NPs-treated rice plants under normal and drought stress conditions. The overall significance of the study lies in devising the NPs-based solutions of increasing heavy metal pollution and water availability challenges being faced the farmers around the world.
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Affiliation(s)
- Temoor Ahmed
- State Key Laboratory of Rice Biology and Ministry of Agriculture Key Laboratory of Molecular Biology of Crop Pathogens and Insects, Institute of Biotechnology, Zhejiang University, 310058 Hangzhou, China
| | - Muhammad Noman
- State Key Laboratory of Rice Biology and Ministry of Agriculture Key Laboratory of Molecular Biology of Crop Pathogens and Insects, Institute of Biotechnology, Zhejiang University, 310058 Hangzhou, China
| | - Natasha Manzoor
- Department of Soil and Water Sciences, China Agricultural University, Beijing 100083, China
| | - Muhammad Shahid
- Department of Bioinformatics and Biotechnology, Government College University, Faisalabad 38000, Pakistan.
| | - Muhammad Abdullah
- Agronomy Department, College of Agriculture and Biotechnology, Zhejiang University, Hangzhou 310058, China
| | - Liaqat Ali
- Department of Soil and Environmental Sciences, University of Agriculture Faisalabad, Sub-campus Burewala, Vehari, Punjab, Pakistan
| | - Gang Wang
- Department of Soil and Water Sciences, China Agricultural University, Beijing 100083, China
| | - Abeer Hashem
- Botany and Microbiology Department, College of Science, King Saud University, P.O. Box. 2460, Riyadh 11451, Saudi Arabia; Mycology and Plant Disease Survey Department, Plant Pathology Research Institute, ARC, Giza 12511, Egypt
| | - Al-Bandari Fahad Al-Arjani
- Botany and Microbiology Department, College of Science, King Saud University, P.O. Box. 2460, Riyadh 11451, Saudi Arabia
| | - Abdulaziz A Alqarawi
- Plant Production Department, College of Food and Agricultural Sciences, King Saud University, P.O. Box. 2460, Riyadh 11451, Saudi Arabia
| | - Elsayed Fathi Abd Allah
- Plant Production Department, College of Food and Agricultural Sciences, King Saud University, P.O. Box. 2460, Riyadh 11451, Saudi Arabia
| | - Bin Li
- State Key Laboratory of Rice Biology and Ministry of Agriculture Key Laboratory of Molecular Biology of Crop Pathogens and Insects, Institute of Biotechnology, Zhejiang University, 310058 Hangzhou, China.
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Diao ZH, Yan L, Dong FX, Chen ZL, Guo PR, Qian W, Zhang WX, Liang JY, Huang ST, Chu W. Ultrasound-assisted catalytic reduction of Cr(VI) by an acid mine drainage based nZVI coupling with FeS 2 system from aqueous solutions: Performance and mechanism. JOURNAL OF ENVIRONMENTAL MANAGEMENT 2021; 278:111518. [PMID: 33113397 DOI: 10.1016/j.jenvman.2020.111518] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/07/2020] [Revised: 09/30/2020] [Accepted: 10/12/2020] [Indexed: 05/22/2023]
Abstract
Nowadays, nanoscale zero valent iron (nZVI) has been extensively applied for the decontamination of various pollutants, but passivation of nZVI severely affects its reactivity in use. In this study, ultrasound (US)-assisted catalytic reduction of Cr(VI) by an acid mine drainage based nZVI (AMD-nZVI) coupling with FeS2 system was systematically examined. Results show that the presence of FeS2 and US induced a synergistic enhancement of Cr(VI) removal by AMD-nZVI. Nearly 98% of Cr(VI) removal was achieved by AMD-nZVI/FeS2/US process within 60 min under optimal reaction conditions. Several coexisting substances with lower concentration including Pb(II), Ni(II), bisphenol A (BPA) and 2,4-diclorophenol (2,4-DCP) could be effectively removed in simultaneous manner with Cr(VI) removal. The inhibitory order of water matrix species on Cr(VI) removal was NO3- > PO43- > HCO3- > Ca2+ > Mg2+ > Cl-, and a serious suppression effect was induced by humic acid (HA). Addition of ethylene diamine tetra-acetic acid (EDTA) and citric acid (CA) could enhance Cr(VI) removal rate. An enhanced reaction mechanism was proposed, which involved the regeneration of more Fe2+ and H+ by AMD-nZVI/FeS2/US process, leading to the reduction of Cr(VI) by AMD-nZVI and FeS2 into Cr(III) species inculding Cr2O3 and Cr(OH)3. This study well demonstrates that AMD-nZVI/FeS2/US process is considered as a potential candidate for the remediation of Cr(VI) in real wasterwater.
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Affiliation(s)
- Zeng-Hui Diao
- Zhongkai University of Agriculture and Engineering, Guangzhou, 510225, China; Hong Kong Polytechnic University, Hong Kong; Engineering and Technology Research Center for Agricultural Land Pollution Prevention and Control of Guangdong Higher Education Institutes, Guangzhou, 510225, China.
| | - Liu Yan
- Zhongkai University of Agriculture and Engineering, Guangzhou, 510225, China
| | - Fu-Xin Dong
- Zhongkai University of Agriculture and Engineering, Guangzhou, 510225, China
| | - Zhi-Liang Chen
- South China Institute of Environmental Sciences, Guangzhou, 510635, China
| | - Peng-Ran Guo
- Guangdong Engineering Technology Research Center of On-line Monitoring of Water Environmental Pollution, Guangdong Institute of Analysis, Guangzhou, 510070, China
| | - Wei Qian
- Zhongkai University of Agriculture and Engineering, Guangzhou, 510225, China
| | - Wen-Xuan Zhang
- Zhongkai University of Agriculture and Engineering, Guangzhou, 510225, China
| | - Jing-Yi Liang
- Zhongkai University of Agriculture and Engineering, Guangzhou, 510225, China
| | - Shi-Ting Huang
- Zhongkai University of Agriculture and Engineering, Guangzhou, 510225, China
| | - Wei Chu
- Hong Kong Polytechnic University, Hong Kong.
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Xu J, Avellan A, Li H, Clark EA, Henkelman G, Kaegi R, Lowry GV. Iron and Sulfur Precursors Affect Crystalline Structure, Speciation, and Reactivity of Sulfidized Nanoscale Zerovalent Iron. ENVIRONMENTAL SCIENCE & TECHNOLOGY 2020; 54:13294-13303. [PMID: 32966049 DOI: 10.1021/acs.est.0c03879] [Citation(s) in RCA: 88] [Impact Index Per Article: 22.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
The reactivity of sulfidized nanoscale zerovalent iron (SNZVI) is affected by the amount and species of sulfur in the materials. Here, we assess the impact of the Fe (Fe2+ and Fe3+) and S (S2O42-, S2-, and S62-) precursors used to synthesize both NZVI and SNZVI on the resulting physicochemical properties and reactivity and selectivity with water and trichloroethene (TCE). X-ray diffraction indicated that the Fe precursors altered the crystalline structure of both NZVI and SNZVI. The materials made from the Fe3+ precursor had an expanded lattice in the Fe0 body-centered-cubic (BCC) structure and lower electron-transfer resistance, providing higher reactivity with water (∼2-3 fold) and TCE (∼5-13 fold) than those made from an Fe2+ precursor. The choice of the S precursor controlled the S speciation in the SNZVI particles, as indicated by X-ray absorption spectroscopy. Iron disulfide (FeS2) was the main S species of SNZVI made from S2O42-, whereas iron sulfide (FeS) was the main S species of SNZVI made from S2-/S62-. The former SNZVI was more hydrophobic, reactive with, and selective for TCE compared to the latter SNZVI. These results suggest that the Fe and S precursors can be used to select the conditions of the synthesis process and provide selected physicochemical properties (e.g., S speciation, hydrophobicity, and crystalline structure), reactivity, and selectivity of the SNZVI materials.
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Affiliation(s)
- Jiang Xu
- Department of Civil and Environmental Engineering, Carnegie Mellon University, Pittsburgh, Pennsylvania 15213, United States
- Center for Environmental Implications of NanoTechnology, Carnegie Mellon University, Pittsburgh, Pennsylvania 15213, United States
| | - Astrid Avellan
- Department of Civil and Environmental Engineering, Carnegie Mellon University, Pittsburgh, Pennsylvania 15213, United States
- Center for Environmental Implications of NanoTechnology, Carnegie Mellon University, Pittsburgh, Pennsylvania 15213, United States
| | - Hao Li
- Department of Chemistry and the Oden Institute for Computational Engineering and Sciences, The University of Texas at Austin, Austin, Texas 78712, United States
| | - Elizabeth A Clark
- Department of Materials Science and Engineering, Carnegie Mellon University, Pittsburgh, Pennsylvania 15213, United States
| | - Graeme Henkelman
- Department of Chemistry and the Oden Institute for Computational Engineering and Sciences, The University of Texas at Austin, Austin, Texas 78712, United States
| | - Rälf Kaegi
- Eawag, Swiss Federal Institute of Aquatic Science and Technology, Überlandstrasse 133, 8600 Dübendorf, Switzerland
| | - Gregory V Lowry
- Department of Civil and Environmental Engineering, Carnegie Mellon University, Pittsburgh, Pennsylvania 15213, United States
- Center for Environmental Implications of NanoTechnology, Carnegie Mellon University, Pittsburgh, Pennsylvania 15213, United States
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25
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Recent Advances in Magnetic Nanoparticles and Nanocomposites for the Remediation of Water Resources. MAGNETOCHEMISTRY 2020. [DOI: 10.3390/magnetochemistry6040049] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Abstract
Water resources are of extreme importance for both human society and the environment. However, human activity has increasingly resulted in the contamination of these resources with a wide range of materials that can prevent their use. Nanomaterials provide a possible means to reduce this contamination, but their removal from water after use may be difficult. The addition of a magnetic character to nanomaterials makes their retrieval after use much easier. The following review comprises a short survey of the most recent reports in this field. It comprises five sections, an introduction into the theme, reports on single magnetic nanoparticles, magnetic nanocomposites containing two of more nanomaterials, magnetic nanocomposites containing material of a biologic origin and finally, observations about the reported research with a view to future developments. This review should provide a snapshot of developments in what is a vibrant and fast-moving area of research.
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