1
|
Zhang L, Wang Y, Xu Y. Highly efficient degradation of tetracycline in groundwater by nanoscale zero-valent iron-copper bimetallic biochar: active [H] attack and direct electron transfer mechanism. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2024; 31:43941-43955. [PMID: 38913261 DOI: 10.1007/s11356-024-33976-6] [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: 03/23/2024] [Accepted: 06/08/2024] [Indexed: 06/25/2024]
Abstract
Development of carbon materials with high activity was important for rapid degradation of emerging pollutants. In this paper, a novel nanoscale zero-valent iron-copper bimetallic biochar (nZVIC-BC) was synthesized by carbothermal reduction of waste pine wood and copper-iron layered double hydroxides (LDHs). Characterization and analysis of its structural, elemental, crystalline, and compositional aspects using XRD, FT-IR, SEM, and TEM confirmed the successful preparation of nZVIC-BC and the high dispersion of Fe-Cu nanoparticles in an ordered carbon matrix. The experimental results showed that the catalytic activity of nZVIC-BC (Kobs of 0.0219 min-1) in the degradation of tetracycline (TC) in anoxic water environment was much higher than that of Fe-BC and Cu-BC; the effective degradation rate reached 85%. It was worth noting that the negative effects of Ca2+, Mg2+, and H2PO4- on TC degradation at ionic strengths greater than 15 mg/L were due to competition for active sites. Good stability and reusability were demonstrated in five consecutive cycle tests for low leaching of iron and copper. Combined with free radical quenching experiments and XPS analyses, the degradation of TC under air conditions was only 62%, with hydroxyl radicals (·OH) playing a dominant role. The synergistic interaction between Fe2+/Fe3+ and Cu0/Cu+/Cu2+ under nitrogen atmosphere enhances the redox cycling process; π-π adsorption, electron transfer processes, and active [H] were crucial for the degradation of TC; and possible degradation pathways of TC were deduced by LC-MS, which identified seven major aromatic degradation by-products. This study will provide new ideas and materials for the treatment of TC.
Collapse
Affiliation(s)
- Lingling Zhang
- Department of Environment, College of Environment and Resources, Xiangtan University, Xiangtan, Hunan, 411105, P. R. China
| | - Yujiao Wang
- Department of Environment, College of Environment and Resources, Xiangtan University, Xiangtan, Hunan, 411105, P. R. China
- Hunan Key Lab for Environmental Behavior of New Pollutants and Control Principle, Hunan, 411105, P. R. China
| | - Yin Xu
- Department of Environment, College of Environment and Resources, Xiangtan University, Xiangtan, Hunan, 411105, P. R. China.
- Hunan Key Lab for Environmental Behavior of New Pollutants and Control Principle, Hunan, 411105, P. R. China.
| |
Collapse
|
2
|
Yu N, Ma H, Wen Z, Zhang W, Chen J, Yuan Y, Zhou L. Bacteria-based biochar as a persulfate activator to degrade organic pollutants. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2023; 30:83289-83301. [PMID: 37338679 DOI: 10.1007/s11356-023-28202-8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/15/2022] [Accepted: 06/06/2023] [Indexed: 06/21/2023]
Abstract
Carbon-based catalysts for activating persulfate to drive advanced oxidation processes (AOPs) are widely used in wastewater treatment. In this study, Shewanella oneidensis MR-1, a typical ferric reducing electroactive microorganism, was utilized as the raw material of biochar (BC) to prepare a novel green catalyst (MBC). The effect of MBC on activating persulfate (PS) to degrade rhodamine B (RhB) was evaluated. Experimental results showed that MBC could effectively activate PS to degrade RhB to reach 91.70% within 270 min, which was 47.4% higher than that of pure strain MR-1. The increasing dosage of PS and MBC could improve the removal of RhB. Meanwhile, MBC/PS can well perform in a wide pH range, and MBC showed good stability, achieving 72.07% removal of RhB with MBC/PS after 5 cycles. Furthermore, the free radical quenching test and EPR experiments confirmed the presence of both free radical and non-free radical mechanisms in the MBC/PS system, with •OH, SO4•- and 1O2 contributing to the effective degradation of RhB. This study successfully provided a new application for bacteria to be used in the biochar field.
Collapse
Affiliation(s)
- Na Yu
- School of Biomedical and Pharmaceutical Sciences, Guangdong University of Technology, Guangzhou, 510006, China
| | - Hanyu Ma
- School of Biomedical and Pharmaceutical Sciences, Guangdong University of Technology, Guangzhou, 510006, China
| | - Zhihong Wen
- School of Biomedical and Pharmaceutical Sciences, Guangdong University of Technology, Guangzhou, 510006, China
| | - Wenbin Zhang
- School of Biomedical and Pharmaceutical Sciences, Guangdong University of Technology, Guangzhou, 510006, China
| | - Jiahao Chen
- School of Biomedical and Pharmaceutical Sciences, Guangdong University of Technology, Guangzhou, 510006, China
| | - Yong Yuan
- Guangdong Key Laboratory of Environmental Catalysis and Health Risk Control, School of Environmental Science and Engineering, Institute of Environmental Health and Pollution Control, Guangdong University of Technology, Guangzhou, 510006, China
| | - Lihua Zhou
- School of Biomedical and Pharmaceutical Sciences, Guangdong University of Technology, Guangzhou, 510006, China.
| |
Collapse
|
3
|
Jin Y, Wang Y, Li X, Luo T, Ma Y, Wang B, Liang H. Remediation and its biological responses to Cd(II)-Cr(VI)-Pb(II) multi-contaminated soil by supported nano zero-valent iron composites. THE SCIENCE OF THE TOTAL ENVIRONMENT 2023; 867:161344. [PMID: 36610630 DOI: 10.1016/j.scitotenv.2022.161344] [Citation(s) in RCA: 17] [Impact Index Per Article: 17.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/27/2022] [Revised: 11/18/2022] [Accepted: 12/29/2022] [Indexed: 06/17/2023]
Abstract
Multi-metal contaminated soil has received extensive attention. The biochar and bentonite-supported nano zero-valent iron (nZVI) (BC-BE-nZVI) composite was synthesized in this study by the liquid-phase reduction method. Subsequently, the BC-BE-nZVI composite was applied to immobilize cadmium (Cd), chromium (Cr), and lead (Pb) in simulated contaminated soil. The simultaneous immobilization efficiencies of Cd, Cr(VI), Crtotal, and Pb were achieved at 70.95 %, 100 %, 86.21 %, and 100 %, respectively. In addition, mobility and bioavailabilities of Cd, Cr, and Pb were significantly decreased and the risk of iron toxicity was reduced. Stabilized metal species in the contaminated soil (e.g., Cd(OH)2, Cd-Fe-(OH)2, CrxFe1-xOOH, CrxFe1-x(OH)3, PbO, PbCrO4, and Pb(OH)2) were formed after the BC-BE-nZVI treatment. Thus, the immobilization mechanisms of Cd, Cr, and Pb, including adsorption, reduction, co-precipitation, and complexation co-exist with the metals. More importantly, bacterial richness, bacterial diversity, soil enzyme activities (dehydrogenase, urease, and fluorescein diacetate hydrolase), and microbial activity were enhanced by applying the BC-BE-nZVI composite, thus increasing the soil metabolic function. Over all, this work applied a promising procedure for remediating multi- metal contaminated soil by using the BC-BE-nZVI composite.
Collapse
Affiliation(s)
- Yi Jin
- School of Chemistry and Chemical Engineering, Southwest Petroleum University, Chengdu, Sichuan 610500, PR China
| | - Yaxuan Wang
- School of Chemistry and Chemical Engineering, Southwest Petroleum University, Chengdu, Sichuan 610500, PR China
| | - Xi Li
- School of Chemistry and Chemical Engineering, Southwest Petroleum University, Chengdu, Sichuan 610500, PR China; Oil & Gas Field Applied Chemistry Key Laboratory of Sichuan Province, Chengdu, Sichuan 610500, PR China.
| | - Ting Luo
- School of Chemistry and Chemical Engineering, Southwest Petroleum University, Chengdu, Sichuan 610500, PR China
| | - Yongsong Ma
- School of Resource and Environmental Sciences, Wuhan University, Wuhan 430072, PR China
| | - Bing Wang
- School of Chemistry and Chemical Engineering, Southwest Petroleum University, Chengdu, Sichuan 610500, PR China; Oil & Gas Field Applied Chemistry Key Laboratory of Sichuan Province, Chengdu, Sichuan 610500, PR China
| | - Hong Liang
- School of Chemistry and Chemical Engineering, Southwest Petroleum University, Chengdu, Sichuan 610500, PR China; Oil & Gas Field Applied Chemistry Key Laboratory of Sichuan Province, Chengdu, Sichuan 610500, PR China
| |
Collapse
|
4
|
Yu H, Zhang D, Gu L, Wen H, Zhu N. Coupling sludge-based biochar and electrolysis for conditioning and dewatering of sewage sludge: Effect of char properties. ENVIRONMENTAL RESEARCH 2022; 214:113974. [PMID: 35952734 DOI: 10.1016/j.envres.2022.113974] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/03/2022] [Revised: 07/07/2022] [Accepted: 07/20/2022] [Indexed: 06/15/2023]
Abstract
The addition of sludge-based biochar during electrochemical pretreatment of sewage sludge, as an efficient hybrid technology, is potentially to be applied in sludge deep-dewatering. The chars functioned as conductors, catalysts and skeleton particles could enhance the sludge dewaterability and increase the calorific value of the dewatered sludge cake. However, the effect of synthesis conditions on the char properties and further on the dewatering performance is still unknown. Herein, the sludge-based particle electrodes (SPEs) under three main synthesis conditions, including liquid-solid ratio, pyrolysis temperature and time, were prepared. The sludge-based biochars (i.e., SPE-400, SPE-600, and SPE-800 pyrolyzed under 400, 600 and 800 °C, respectively) were characterized and utilized as three-dimensional electrodes during sludge electrolysis. The increased pyrolysis temperature (within 400-800 °C) resulted in the enrichment of metallic ions and increment of specific surface area and pore volume of SPE, which led to the increased catalysis and adsorption sites for viscous proteins (PNs). Particularly, the pores of SPE-800 provided more drainage channels as skeleton builders. Compared with raw sludge, the capillary suction time (CST) and the specific resistance of filtration (SRF) of the treated sludge with 3D-SPE-800 were reduced by 58.12% and 81.01%, respectively, but the net sludge solids yield (YN) was increased by 87.05%. The highest decrease of hydrophilic α-Helix content in PNs (from 9.93% to 7.30%) was observed when using SPE-800 as particle electrode, revealing the crucial role of char characteristics on protein reduction and subsequent dewatering enhancement. The synergistic effects of electrolysis and sludge-based biochar provided a new insight for a closed-loop pretreatment of sewage sludge in the wastewater treatment plant.
Collapse
Affiliation(s)
- Haixiang Yu
- School of Environment and Architecture, University of Shanghai for Science and Technology, Shanghai, 200093, PR China
| | - Daofang Zhang
- School of Environment and Architecture, University of Shanghai for Science and Technology, Shanghai, 200093, PR China
| | - Lin Gu
- School of Environment and Architecture, University of Shanghai for Science and Technology, Shanghai, 200093, PR China; School of Environment Engineering, Shanghai Jiao Tong University, Shanghai, 200240, PR China.
| | - Haifeng Wen
- School of Environment and Architecture, University of Shanghai for Science and Technology, Shanghai, 200093, PR China
| | - Nanwen Zhu
- School of Environment Engineering, Shanghai Jiao Tong University, Shanghai, 200240, PR China
| |
Collapse
|
5
|
Recent Development in Sludge Biochar-Based Catalysts for Advanced Oxidation Processes of Wastewater. Catalysts 2021. [DOI: 10.3390/catal11111275] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
Abstract
Sewage sludge as waste of the wastewater treatment process contains toxic substances, and its conversion into sludge biochar-based catalysts is a promising strategy that merges the merits of waste reutilization and environmental cleanup. This study aims to systematically recapitulate the published articles on the development of sludge biochar-based catalysts in different advanced oxidation processes of wastewater, including sulfate-based system, Fenton-like systems, photocatalysis, and ozonation systems. Due to abundant functional groups, metal phases and unique structures, sludge biochar-based catalysts exhibit excellent catalytic behavior for decontamination in advanced oxidation systems. In particular, the combination of sludge and pollutant dopants manifests a synergistic effect. The catalytic mechanisms of as-prepared catalysts in these systems are also investigated. Furthermore, initial solution pH, catalyst dosage, reaction temperature, and coexisting anions have a vital role in advanced oxidation processes, and these parameters are systematically summarized. In summary, this study could provide relatively comprehensive and up-to-date messages for the application of sludge biochar-based catalysts in the advanced oxidation processes of wastewater treatment.
Collapse
|
6
|
Tan W, Ruan Y, Diao Z, Song G, Su M, Hou L, Chen D, Kong L, Deng H. Removal of levofloxacin through adsorption and peroxymonosulfate activation using carbothermal reduction synthesized nZVI/carbon fiber. CHEMOSPHERE 2021; 280:130626. [PMID: 34162068 DOI: 10.1016/j.chemosphere.2021.130626] [Citation(s) in RCA: 12] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/26/2021] [Revised: 03/26/2021] [Accepted: 04/18/2021] [Indexed: 06/13/2023]
Abstract
Nano zero-valent iron (nZVI) is widely used for decontamination. The main issues associated with nZVI are agglomeration and oxidation in the long term. In this study, the carbothermal reduction of cotton fiber was conducted for the synthesis of nZVI supported on cotton carbon fiber (nZVI/CF) to address the agglomeration and oxidation of nZVI. Synergistic adsorption and peroxymonosulfate (PMS) activation using nZVI/CF for removing levofloxacin (LEV) are reported herein. The nZVI concentration and morphology were conveniently adjusted by soaking cotton fiber in ferric nitrate solutions of various Fe3+ concentrations. The carbothermal reduction of the cotton fiber at 900 °C contributed to the reduction of Fe3+ into nZVI. A nZVI/CF-900-0.3 system was obtained through the carbothermal reduction of cotton fiber soaked in 0.3 M ferric nitrate. Favorable adsorption of nZVI/CF-900-0.3 to LEV facilitated LEV degradation under PMS activation. Approximately 93.83% of LEV (C0 = 20 ppm) was removed within 60 min with 0.2 g/L of the catalyst and 1 mM PMS. It was preferable to use nZVI + CF-900 to activate PMS for degrading LEV, thus confirming the favorable effect of LEV adsorption on further degradation. The nZVI/CF-900-0.3 exhibited excellent long-term stability given that it was able to activate PMS after it was stored for 6 months. ·SO4- played an important role in LEV degradation in the presence of PMS.
Collapse
Affiliation(s)
- Weitong Tan
- Guangdong Provincial Key Laboratory of Radionuclides Pollution Control and Resources, School of Environmental Science and Engineering, Guangzhou University, Guangzhou, 510006, China
| | - Yang Ruan
- Guangdong Provincial Key Laboratory of Radionuclides Pollution Control and Resources, School of Environmental Science and Engineering, Guangzhou University, Guangzhou, 510006, China
| | - Zenghui Diao
- School of Environmental Science and Engineering, Zhongkai University of Agriculture and Engineering, Guangzhou, 510225, China
| | - Gang Song
- Guangdong Provincial Key Laboratory of Radionuclides Pollution Control and Resources, School of Environmental Science and Engineering, Guangzhou University, Guangzhou, 510006, China
| | - Minhua Su
- Guangdong Provincial Key Laboratory of Radionuclides Pollution Control and Resources, School of Environmental Science and Engineering, Guangzhou University, Guangzhou, 510006, China
| | - Li'an Hou
- Guangdong Provincial Key Laboratory of Radionuclides Pollution Control and Resources, School of Environmental Science and Engineering, Guangzhou University, Guangzhou, 510006, China
| | - Diyun Chen
- Guangdong Provincial Key Laboratory of Radionuclides Pollution Control and Resources, School of Environmental Science and Engineering, Guangzhou University, Guangzhou, 510006, China
| | - Lingjun Kong
- Guangdong Provincial Key Laboratory of Radionuclides Pollution Control and Resources, School of Environmental Science and Engineering, Guangzhou University, Guangzhou, 510006, China; Guangdong Key Laboratory of Environmental Catalysis and Health Risk Control, School of Environmental Science and Engineering, Institute of Environmental Health and Pollution Control, Guangdong University of Technology, Guangzhou, 510006, China.
| | - Hongmei Deng
- Guangdong Provincial Key Laboratory of Radionuclides Pollution Control and Resources, School of Environmental Science and Engineering, Guangzhou University, Guangzhou, 510006, China.
| |
Collapse
|
7
|
Li J, Zhou Q, Li M, Liu Y, Song Q. Monodisperse amino-modified nanosized zero-valent iron for selective and recyclable removal of TNT: Synthesis, characterization, and removal mechanism. J Environ Sci (China) 2021; 103:69-79. [PMID: 33743920 DOI: 10.1016/j.jes.2020.10.009] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/08/2020] [Revised: 10/07/2020] [Accepted: 10/14/2020] [Indexed: 06/12/2023]
Abstract
Nitroaromatic explosives are major pollutants produced during wars that cause serious environmental and health problems. The removal of a typical nitroaromatic explosive, 2,4,6-trinitrotoluene (TNT), from aqueous solution, was conducted using a new recyclable magnetic nano-adsorbent (Fe@SiO2NH2). This adsorbent was prepared by grafting amino groups onto Fe@SiO2 particles with a well-defined core-shell structure and demonstrated monodispersity in solution. The removal performance of the nano-adsorbent towards TNT was found to be 2.57 and 4.92 times higher than that towards two analogous explosives, 2,4-dinitrotoluene (2,4-DNT) and 2-nitrotoluene (2-NT), respectively, under neutral conditions. The difference in the removal performance among the three compounds was further compared in terms of the effects of different conditions (pH value, ionic strength, humic acid concentration, adsorbent modification degree and dosage, etc.) and the electrostatic potential distributions of the three compounds. The most significant elevation is owing to modification of amino on Fe@SiO2 which made a 20.7% increase in adsorption efficiency of TNT. The experimental data were well fit by the pseudo-second-order kinetic model and the Freundlich adsorption isotherm model, indicating multilayer adsorption on a heterogeneous surface. The experimental results and theoretical considerations show that the interactions between Fe@SiO2NH2 NPs and TNT correspond to dipole-dipole and hydrophobic interactions. These interactions should be considered in the design of an adsorbent. Furthermore, the adaptability to aqueous environment and excellent regeneration capacity of Fe@SiO2NH2 NPs makes these remediation materials promising for applications.
Collapse
Affiliation(s)
- Jing Li
- School of Environment, Tsinghua University, Beijing 100084, China; State Key Laboratory of Heavy Oil Processing, State Key Laboratory of Petroleum Pollution Control, College of Chemical Engineering and Environment, China University of Petroleum Beijing, Beijing 102249, China
| | - Qingxiang Zhou
- State Key Laboratory of Heavy Oil Processing, State Key Laboratory of Petroleum Pollution Control, College of Chemical Engineering and Environment, China University of Petroleum Beijing, Beijing 102249, China.
| | - Miao Li
- School of Environment, Tsinghua University, Beijing 100084, China.
| | - Yongli Liu
- School of Environment, Henan Normal University, Xinxiang, Henan 453007, China
| | - Qinan Song
- School of Environment, Tsinghua University, Beijing 100084, China
| |
Collapse
|
8
|
Wu W, Zhu S, Huang X, Wei W, Ni BJ. Mechanisms of persulfate activation on biochar derived from two different sludges: Dominance of their intrinsic compositions. JOURNAL OF HAZARDOUS MATERIALS 2021; 408:124454. [PMID: 33168308 DOI: 10.1016/j.jhazmat.2020.124454] [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: 08/01/2020] [Revised: 10/12/2020] [Accepted: 10/30/2020] [Indexed: 06/11/2023]
Abstract
Sludge-derived biochar (SDBC) has been regarded as persulfate (PS) activator during the remediation of organic contamination. However, the complexity of sludge composition makes it difficult to predict the activity of SDBC and the efficacy of PS. To improve the understanding of how the composition of sludge regulated activity of its parent SDBC towards PS activation, we used two SDBCs derived from different sludges with significantly different organic compositions and metals. Results indicated the higher content of organic and nitrogen content in sludge led to higher polymerization and condensation of carbon layer and more moieties in SDBC1, whereas more Fe species (e.g. Fe-O, Fe2+ and Fe3+) formed in SDBC2. According to the results of phenol (PN) degradation in SDBC/PS, the apparent rate constants (kobs) of SDBC2-700 (0.0037 min-1) was 2 folds higher than that of SDBC1-700 (0.0016 min-1), whereas the SDBC1-500 (6.0 ×10-4 min-1) exhibited higher kobs than that of SDBC2-500 (4.9 ×10-4 min-1). The difference of PS activation by different SDBCs mainly relied on generated reactive oxygen species (ROS). The persistent free radicals (PFRs) and Fe species acted as redox sites for generated ROS, which were depended on the organic compositions and involved metals in used sludges.
Collapse
Affiliation(s)
- Wei Wu
- State Key Laboratory of Pollution Control and Resources Reuse, College of Environmental Science and Engineering, Tongji University, Shanghai 200092, PR China; Shanghai Institute of Pollution Control and Ecological Security, Shanghai 200092, PR China
| | - Shishu Zhu
- School of Environmental Science and Engineering, Sun Yat-Sen University, Guangzhou 510275, PR China.
| | - Xiaochen Huang
- School of Environment, Jinan University, Guangzhou 510632, PR China
| | - Wei Wei
- State Key Laboratory of Pollution Control and Resources Reuse, College of Environmental Science and Engineering, Tongji University, Shanghai 200092, PR China
| | - Bing-Jie Ni
- State Key Laboratory of Pollution Control and Resources Reuse, College of Environmental Science and Engineering, Tongji University, Shanghai 200092, PR China; Shanghai Institute of Pollution Control and Ecological Security, Shanghai 200092, PR China.
| |
Collapse
|
9
|
Meng G, Liu B, Sun M, Miao Q, Ding S, Zhang J, Liu Z. Sludge-based activated carbon catalyzed H 2O 2 oxidation of reactive azo dyes. ENVIRONMENTAL TECHNOLOGY 2021; 42:682-693. [PMID: 31293221 DOI: 10.1080/09593330.2019.1643409] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/24/2019] [Accepted: 07/05/2019] [Indexed: 06/09/2023]
Abstract
Sludge-based activated carbon (ZAC) was successfully employed as both adsorbent and catalyst for the oxidation process of reactive yellow 86 (RY86) and reactive black 5 (RB5). Physicochemical properties of the prepared sewage sludge-derived activated carbon were evaluated by N2 adsorption/desorption, Fourier transform infrared spectroscopy (FT-IR) and scanning electron microscopy (SEM). The effects of parameters such as initial pH, H2O2 concentrations, ZAC dosages, dye concentrations and temperature on the removal of RY86 and RB5 were investigated. Kinetics results showed that the adsorption rates of RY86 and RB5 by ZAC can be approximated by the pseudo-first order model, and that the oxidation rates by Behnajady-Modirshahla-Ghanbery (BMG) model. Under the optimum conditions in the experiment, i.e. pH = 6.0, T = 303 K, [H2O2] = 49.5 mmol/L, [ZAC] = 4 g/L, [dyes] = 300 mg/L and t = 150 min, 99%, 88% and 84% of colour, COD and TOC were removed by Fenton -like oxidation for RY86, while for RB5, the three removal rates were 90%, 70% and 62%, respectively, indicating that sludge-based activated carbon can be used as an effective catalyst to oxidation of dyes by H2O2 from coloured wastewater.
Collapse
Affiliation(s)
- Guanhua Meng
- School of Energy and Environment, Anhui University of Technology, Ma'anshan, People's Republic of China
- Ministry of Education, Engineering Research Center of Biomembrane Water Purification and Utilization Technology, Ma'anshan, People's Republic of China
| | - Baohe Liu
- School of Energy and Environment, Anhui University of Technology, Ma'anshan, People's Republic of China
- Ministry of Education, Engineering Research Center of Biomembrane Water Purification and Utilization Technology, Ma'anshan, People's Republic of China
| | - Man Sun
- School of Energy and Environment, Anhui University of Technology, Ma'anshan, People's Republic of China
| | - Qianqian Miao
- School of Energy and Environment, Anhui University of Technology, Ma'anshan, People's Republic of China
| | - Suyun Ding
- School of Energy and Environment, Anhui University of Technology, Ma'anshan, People's Republic of China
| | - Jiangling Zhang
- School of Energy and Environment, Anhui University of Technology, Ma'anshan, People's Republic of China
| | - Zailiang Liu
- School of Energy and Environment, Anhui University of Technology, Ma'anshan, People's Republic of China
- Ministry of Education, Engineering Research Center of Biomembrane Water Purification and Utilization Technology, Ma'anshan, People's Republic of China
| |
Collapse
|
10
|
Gao JM, Ma S, Du Z, Cheng F, Li P. Zinc-bearing dust derived non-toxic mixed iron oxides as magnetically recyclable photo-Fenton catalyst for degradation of dye. WATER SCIENCE AND TECHNOLOGY : A JOURNAL OF THE INTERNATIONAL ASSOCIATION ON WATER POLLUTION RESEARCH 2021; 83:425-434. [PMID: 33504705 DOI: 10.2166/wst.2020.590] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/12/2023]
Abstract
In this paper, comprehensive utilization of hazardous zinc-bearing dust for preparation of non-toxic mixed iron oxides as a magnetically recyclable photo-Fenton catalyst for degradation of dye by a facile solid state reaction process was proposed. The as-prepared samples were characterized by X-ray diffraction (XRD), Raman spectra, ultraviolet and visible (UV-Vis) spectra and Physical Property Measurement System (PPMS), and the degradation performance of as-prepared catalysts was also tested and analyzed. The results show that spinel ferrite coexisting with or without Fe2O3 was the predominant phase in the as-prepared samples, which were confirmed by Raman analysis. The as-prepared samples presented high degradation efficiency (about 90%) of rhodamine B (RhB) in the presence of hydrogen peroxide (H2O2) with visible light irradiation, owing to the synergistic effect of photocatalyst reaction and Fenton-like catalyst reaction during the degradation process. The mixed iron oxides also presented stable structure and exhibited excellent reusability with a degradation efficiency of 87% after the fifth cycle of reuse. Importantly, the heavy metals in the zinc-bearing dust could be fixed in the stable spinel structure. This paper could provide a simple approach for comprehensive utilization of zinc-bearing dust to synthesize non-toxic mixed iron oxides as a magnetically recyclable photo-Fenton catalyst for degradation of dye.
Collapse
Affiliation(s)
- Jian-Ming Gao
- State Environmental Protection Key Laboratory of Efficient Utilization Technology of Coal Waste Resources, Shanxi Collaborative Innovation Center of High Value-added Utilization of Coal-related Wastes, Shanxi University, Taiyuan 030006, China E-mail:
| | - ShuJia Ma
- State Environmental Protection Key Laboratory of Efficient Utilization Technology of Coal Waste Resources, Shanxi Collaborative Innovation Center of High Value-added Utilization of Coal-related Wastes, Shanxi University, Taiyuan 030006, China E-mail:
| | - Zongyuan Du
- State Environmental Protection Key Laboratory of Efficient Utilization Technology of Coal Waste Resources, Shanxi Collaborative Innovation Center of High Value-added Utilization of Coal-related Wastes, Shanxi University, Taiyuan 030006, China E-mail:
| | - Fangqin Cheng
- State Environmental Protection Key Laboratory of Efficient Utilization Technology of Coal Waste Resources, Shanxi Collaborative Innovation Center of High Value-added Utilization of Coal-related Wastes, Shanxi University, Taiyuan 030006, China E-mail:
| | - Peng Li
- Shagang School of Iron and Steel, Soochow University, Suzhou, 215021, China
| |
Collapse
|
11
|
Li S, Tang J, Liu Q, Liu X, Gao B. A novel stabilized carbon-coated nZVI as heterogeneous persulfate catalyst for enhanced degradation of 4-chlorophenol. ENVIRONMENT INTERNATIONAL 2020; 138:105639. [PMID: 32179320 DOI: 10.1016/j.envint.2020.105639] [Citation(s) in RCA: 36] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/18/2019] [Revised: 02/07/2020] [Accepted: 03/04/2020] [Indexed: 06/10/2023]
Abstract
Nano zero-valent iron (nZVI) and its composite materials have been extensively studied in the field of environmental remediation. However, the oxidation and agglomeration of nZVI limits the large-scale application of nZVI in environmental remediation. This study developed a two-step method to prepare stable carbon-coated nZVI (Fe0@C) which combined hydrothermal carbonization and carbothermal reduction methods and used glucose and iron oxide (Fe3O4) as precursors. When the carbothermal reduction temperature was 700 °C and the elemental molar ratio of carbon to iron was 22:1, stable Fe0@C can be generated. The nZVI particles are encapsulated by mesoporous carbon and embedded in the carbon spheres. The unique structure of carbon coating not only inhibits the agglomeration of nZVI, but also makes nZVI stable in air for more than 120 days. Not only that, the as-synthesized Fe0@C exhibited high catalytic activity toward the degradation of 4-chlorophenol (4-CP) by activating persulfate. Different from conventional nZVI catalysts in generation of sulfate radicals, Fe0@C selectively induced hydroxyl radicals for 4-CP degradation. Moreover, Fe0@C has been shown to efficiently degrade 4-CP by using the dissolved oxygen in water to form hydroxyl radicals. This study not only provides a simple, green method for the preparation of stabilized nZVI, but also provides the possibility of large-scale application of nZVI in the field of environmental remediation.
Collapse
Affiliation(s)
- Song Li
- College of Environmental Science and Engineering, Nankai University, Tianjin 300350, China
| | - Jingchun Tang
- College of Environmental Science and Engineering, Nankai University, Tianjin 300350, China; Key Laboratory of Pollution Processes and Environmental Criteria (Ministry of Education), Tianjin 300350, China; Tianjin Engineering Center of Environmental Diagnosis and Contamination Remediation, Tianjin 300350, China.
| | - Qinglong Liu
- College of Environmental Science and Engineering, Nankai University, Tianjin 300350, China; Tianjin Engineering Center of Environmental Diagnosis and Contamination Remediation, Tianjin 300350, China
| | - Xiaomei Liu
- College of Environmental Science and Engineering, Nankai University, Tianjin 300350, China; Key Laboratory of Pollution Processes and Environmental Criteria (Ministry of Education), Tianjin 300350, China
| | - Bin Gao
- Department of Agricultural and Biological Engineering, University of Florida, Gainesville, FL 32611, United States
| |
Collapse
|
12
|
Mansas C, Mendret J, Brosillon S, Ayral A. Coupling catalytic ozonation and membrane separation: A review. Sep Purif Technol 2020. [DOI: 10.1016/j.seppur.2019.116221] [Citation(s) in RCA: 45] [Impact Index Per Article: 11.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
|
13
|
Liu X, Yang L, Zhao H, Wang W. Pyrolytic production of zerovalent iron nanoparticles supported on rice husk-derived biochar: simple, in situ synthesis and use for remediation of Cr(VI)-polluted soils. THE SCIENCE OF THE TOTAL ENVIRONMENT 2020; 708:134479. [PMID: 31796288 DOI: 10.1016/j.scitotenv.2019.134479] [Citation(s) in RCA: 46] [Impact Index Per Article: 11.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/13/2019] [Revised: 09/12/2019] [Accepted: 09/14/2019] [Indexed: 05/22/2023]
Abstract
The pollution of hexavalent chromium (Cr(VI)) in soil is a serious environmental issue. Herein, nanoscale zero-valent iron (NZVI) supported on rice husk-derived biochar (RBC) was employed as an efficient remediation material to minimize the harm of Cr(VI) in soil. A one-step carbothermal reduction method was used instead of the conventional wet chemistry method for material preparation in this study. Rice husk, an agricultural waste, was adopted as the carbon source (reductant) and support for nanometal synthesis simultaneously, so that the NZVI could be in-situ generated on the acquired biochar during the pyrolysis process. By pyrolyzing at 800 °C, the obtained biochar-supported nanoscale zerovalent iron (NZVI-RBC) exhibited high thermal stability and oxidation resistance. In the treatment of contaminated soil, the Cr(VI) no longer leached out from the soil after a complete removal of Cr(VI) (62.4 mg/L) from soil leachate in 120 min when the used NZVI-RBC dosage was above 8% of the soil in weight. This long-term remediation effect of NZVI-RBC may be related to the electron shuttle function of biochar. Furthermore, the bioavailability of Cr in the contaminated soil was significantly decreased. The present study provided a simple, feasible, and sustainable alternative to make full use of the agricultural waste resource to synthesize composite remediation agent containing NZVI and remediate Cr(VI) contaminated groundwater and soil.
Collapse
Affiliation(s)
- Xingyu Liu
- MOE Key Laboratory of Pollution Processes and Environmental Criteria, Tianjin Key Laboratory of Environmental Remediation and Pollution Control, Tianjin Advanced Water Treatment Technology International Joint Research Center, College of Environmental Science and Engineering, Nankai University, Tianjin 300350, China
| | - Lei Yang
- MOE Key Laboratory of Pollution Processes and Environmental Criteria, Tianjin Key Laboratory of Environmental Remediation and Pollution Control, Tianjin Advanced Water Treatment Technology International Joint Research Center, College of Environmental Science and Engineering, Nankai University, Tianjin 300350, China
| | - Haitong Zhao
- MOE Key Laboratory of Pollution Processes and Environmental Criteria, Tianjin Key Laboratory of Environmental Remediation and Pollution Control, Tianjin Advanced Water Treatment Technology International Joint Research Center, College of Environmental Science and Engineering, Nankai University, Tianjin 300350, China
| | - Wei Wang
- MOE Key Laboratory of Pollution Processes and Environmental Criteria, Tianjin Key Laboratory of Environmental Remediation and Pollution Control, Tianjin Advanced Water Treatment Technology International Joint Research Center, College of Environmental Science and Engineering, Nankai University, Tianjin 300350, China.
| |
Collapse
|
14
|
Tu Y, Peng Z, Huang J, Wu X, Kong L, Liang Z, Yang L, Lin Z. Preparation and Characterization of Magnetic Biochar Nanocomposites via a Modified Solvothermal Method and Their Use as Efficient Heterogeneous Fenton-like Catalysts. Ind Eng Chem Res 2020. [DOI: 10.1021/acs.iecr.9b04590] [Citation(s) in RCA: 17] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Yuting Tu
- Institute of Agricultural Resources and Environment, Guangdong Academy of Agricultural Sciences, Guangzhou 510640, China
- Key Laboratory of Plant Nutrition and Fertilizer in South Region, Ministry of Agriculture, Guangzhou 510640, China
- Guangdong Key Laboratory of Nutrient Cycling and Farmland Conservation, Guangzhou 510640, China
| | - Zhiping Peng
- Institute of Agricultural Resources and Environment, Guangdong Academy of Agricultural Sciences, Guangzhou 510640, China
- Key Laboratory of Plant Nutrition and Fertilizer in South Region, Ministry of Agriculture, Guangzhou 510640, China
- Guangdong Key Laboratory of Nutrient Cycling and Farmland Conservation, Guangzhou 510640, China
| | - Jichuan Huang
- Institute of Agricultural Resources and Environment, Guangdong Academy of Agricultural Sciences, Guangzhou 510640, China
- Key Laboratory of Plant Nutrition and Fertilizer in South Region, Ministry of Agriculture, Guangzhou 510640, China
- Guangdong Key Laboratory of Nutrient Cycling and Farmland Conservation, Guangzhou 510640, China
| | - Xuena Wu
- Institute of Agricultural Resources and Environment, Guangdong Academy of Agricultural Sciences, Guangzhou 510640, China
- Key Laboratory of Plant Nutrition and Fertilizer in South Region, Ministry of Agriculture, Guangzhou 510640, China
- Guangdong Key Laboratory of Nutrient Cycling and Farmland Conservation, Guangzhou 510640, China
| | - Lingjun Kong
- Guangdong Provincial Key Laboratory of Radionuclides Pollution Control and Resources, School of Environmental Science and Engineering, Guangzhou University, Guangzhou 510006, China
| | - Zhixiong Liang
- Institute of Agricultural Resources and Environment, Guangdong Academy of Agricultural Sciences, Guangzhou 510640, China
- Key Laboratory of Plant Nutrition and Fertilizer in South Region, Ministry of Agriculture, Guangzhou 510640, China
- Guangdong Key Laboratory of Nutrient Cycling and Farmland Conservation, Guangzhou 510640, China
| | - Linxiang Yang
- Institute of Agricultural Resources and Environment, Guangdong Academy of Agricultural Sciences, Guangzhou 510640, China
- Key Laboratory of Plant Nutrition and Fertilizer in South Region, Ministry of Agriculture, Guangzhou 510640, China
- Guangdong Key Laboratory of Nutrient Cycling and Farmland Conservation, Guangzhou 510640, China
| | - Zhijun Lin
- Institute of Agricultural Resources and Environment, Guangdong Academy of Agricultural Sciences, Guangzhou 510640, China
- Key Laboratory of Plant Nutrition and Fertilizer in South Region, Ministry of Agriculture, Guangzhou 510640, China
- Guangdong Key Laboratory of Nutrient Cycling and Farmland Conservation, Guangzhou 510640, China
| |
Collapse
|
15
|
Li K, Chen J, Peng J, Ruan R, Srinivasakannan C, Chen G. Pilot-scale study on enhanced carbothermal reduction of low-grade pyrolusite using microwave heating. POWDER TECHNOL 2020. [DOI: 10.1016/j.powtec.2019.11.015] [Citation(s) in RCA: 51] [Impact Index Per Article: 12.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
|
16
|
Deng J, Dong H, Li L, Wang Y, Ning Q, Wang B, Zeng G. Ca(OH)2 coated nanoscale zero-valent iron as a persulfate activator for the degradation of sulfamethazine in aqueous solution. Sep Purif Technol 2019. [DOI: 10.1016/j.seppur.2019.115731] [Citation(s) in RCA: 23] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
|
17
|
Kong L, Hu X, Xie Z, Ren X, Long J, Su M, Diao Z, Chen D, Shih K, Hou L. Accelerated phosphorus recovery from aqueous solution onto decorated sewage sludge carbon. Sci Rep 2018; 8:13421. [PMID: 30194435 PMCID: PMC6128935 DOI: 10.1038/s41598-018-31750-6] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/28/2018] [Accepted: 08/20/2018] [Indexed: 11/13/2022] Open
Abstract
In search of efficient phosphorus resource recovery and pollution remediation should be highly concerned due to the view of phosphorus nonrenewable and eutrophication. This work presented a new insight into conversion of sewage sludge into favorable carbonaceous adsorbent for accelerated removing and recovering phosphorus from aqueous solution, what addressed the issues of phosphorus recovery and pollution remediation as well as sludge disposal. Ca and water hyacinth were evolved to decorate sludge derived carbon. Effect of mass ratio of sludge, water hyacinth and calcium carbonate on the morphologies and adsorption kinetics was investigated. The adsorbents (SW-Ca-112) resulted from sludge in the presence of water hyacinth and CaCO3 in a mass ratio of 1:1:2 had the highest adsorption capacity of 49.50 mg/g P and adsorption rate. Decoration of Ca favored adsorption ability and the presence of water hyacinth accelerated the adsorption rate due to the enhanced porosity. Formation of acicular Ca5(PO4)3OH nanoparticles contributed to the favorable adsorption process. Thus, the contribution of decorated Ca and water hyacinth to the adsorption ability and rate to phosphorus was understand, providing important information on resource utilization of sewage sludge as efficient adsorbent for immobilizing phosphorus from aqueous solution.
Collapse
Affiliation(s)
- Lingjun Kong
- Guangdong Provincial Key Laboratory of Radioactive Contamination Control and Resources, School of Environmental Science and Engineering, Guangzhou University, Guangzhou, 510006, P.R. China. .,Department of Civil Engineering, The University of Hong Kong, Pokfulam Road, Hong Kong, P.R. China.
| | - Xingliang Hu
- Guangdong Provincial Key Laboratory of Radioactive Contamination Control and Resources, School of Environmental Science and Engineering, Guangzhou University, Guangzhou, 510006, P.R. China
| | - Ziying Xie
- Guangdong Provincial Key Laboratory of Radioactive Contamination Control and Resources, School of Environmental Science and Engineering, Guangzhou University, Guangzhou, 510006, P.R. China
| | - Xinyong Ren
- Guangdong Provincial Key Laboratory of Radioactive Contamination Control and Resources, School of Environmental Science and Engineering, Guangzhou University, Guangzhou, 510006, P.R. China
| | - Jianyou Long
- Guangdong Provincial Key Laboratory of Radioactive Contamination Control and Resources, School of Environmental Science and Engineering, Guangzhou University, Guangzhou, 510006, P.R. China
| | - Minhua Su
- Guangdong Provincial Key Laboratory of Radioactive Contamination Control and Resources, School of Environmental Science and Engineering, Guangzhou University, Guangzhou, 510006, P.R. China
| | - Zenghui Diao
- School of Environmental Science and Engineering, Zhongkai University of Agriculture and Engineering, Guangzhou, 510225, China
| | - Diyun Chen
- Guangdong Provincial Key Laboratory of Radioactive Contamination Control and Resources, School of Environmental Science and Engineering, Guangzhou University, Guangzhou, 510006, P.R. China
| | - Kaimin Shih
- Department of Civil Engineering, The University of Hong Kong, Pokfulam Road, Hong Kong, P.R. China
| | - Li'an Hou
- Guangdong Provincial Key Laboratory of Radioactive Contamination Control and Resources, School of Environmental Science and Engineering, Guangzhou University, Guangzhou, 510006, P.R. China
| |
Collapse
|
18
|
Kong L, Zhang H, Shih K, Su M, Diao Z, Long J, Hou L, Song G, Chen D. Synthesis of FC-supported Fe through a carbothermal process for immobilizing uranium. JOURNAL OF HAZARDOUS MATERIALS 2018; 357:168-174. [PMID: 29886361 DOI: 10.1016/j.jhazmat.2018.05.067] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/15/2017] [Revised: 04/15/2018] [Accepted: 05/30/2018] [Indexed: 06/08/2023]
Abstract
The abundant generation of uranium (U), a radioactive nuclide, engenders a severe hazard to the environment. Iron based materials were used to immobilize U from water, however, the immobilization is limited by the agglomeration of nanoparticle Fe. In this study, a novel carbothermal process was proposed to synthesize flour carbon (FC) supported nano-flake Fe (Fe-FC). Scanning electron microscopy (SEM) and nitrogen isotherm adsorption-desorption analysis were conducted to characterize Fe-FC. The immobilization characteristics were investigated through batch sorption experiments. Results indicated that nano-flake was appropriately dispersed on the surface. The sorption capacity reached 19.12 mg/g when the initial concentration of U and the dosage of Fe-FC were 20 mg/L and 1 g/L, respectively. Langmuir isotherm sorption and pseudo-second-order models were fitted well to sorption experimental data. The sorption mechanism is ascribed to surface chemisorptions between U(VI) and Fe-FC. Subsequently, X-ray diffraction (XRD) analysis validated that formation of Fe2UO3 contributed to the favorable immobilization of U and that Fe2UO3 was the fate of U.
Collapse
Affiliation(s)
- Lingjun Kong
- Guangdong Provincial Key Laboratory of Radionuclides Pollution Control and Resources, School of Environmental Science and Engineering, Guangzhou University, Guangzhou 510006, China; Department of Civil Engineering, The University of Hong Kong, Pokfulam Road, Hong Kong, China
| | - Huimin Zhang
- Guangdong Provincial Key Laboratory of Radionuclides Pollution Control and Resources, School of Environmental Science and Engineering, Guangzhou University, Guangzhou 510006, China
| | - Kaimin Shih
- Department of Civil Engineering, The University of Hong Kong, Pokfulam Road, Hong Kong, China
| | - Minhua Su
- Guangdong Provincial Key Laboratory of Radionuclides Pollution Control and Resources, School of Environmental Science and Engineering, Guangzhou University, Guangzhou 510006, China
| | - Zenghui Diao
- South China Sea Institute of Oceanology, Chinese Academy of Sciences, Guangzhou, 510301, China
| | - Jianyou Long
- Guangdong Provincial Key Laboratory of Radionuclides Pollution Control and Resources, School of Environmental Science and Engineering, Guangzhou University, Guangzhou 510006, China
| | - Li'an Hou
- Guangdong Provincial Key Laboratory of Radionuclides Pollution Control and Resources, School of Environmental Science and Engineering, Guangzhou University, Guangzhou 510006, China
| | - Gang Song
- Guangdong Provincial Key Laboratory of Radionuclides Pollution Control and Resources, School of Environmental Science and Engineering, Guangzhou University, Guangzhou 510006, China
| | - Diyun Chen
- Guangdong Provincial Key Laboratory of Radionuclides Pollution Control and Resources, School of Environmental Science and Engineering, Guangzhou University, Guangzhou 510006, China.
| |
Collapse
|
19
|
Kong L, Han M, Shih K, Su M, Diao Z, Long J, Chen D, Hou L, Peng Y. Nano-rod Ca-decorated sludge derived carbon for removal of phosphorus. ENVIRONMENTAL POLLUTION (BARKING, ESSEX : 1987) 2018; 233:698-705. [PMID: 29121605 DOI: 10.1016/j.envpol.2017.10.099] [Citation(s) in RCA: 37] [Impact Index Per Article: 6.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/02/2017] [Revised: 10/08/2017] [Accepted: 10/22/2017] [Indexed: 06/07/2023]
Abstract
Recovering phosphorus (P) from waste streams takes the unique advantage in simultaneously addressing the crisis of eutrophication and the shortage of P resource. A novel calcium decorated sludge carbon (Ca-SC) was developed from dyeing industry wastewater treatment sludge by decorating calcium (Ca) to effectively adsorb phosphorus from solution. The X-ray diffraction (XRD) and Fourier transform infrared (FTIR) techniques were used to characterize the Ca-SCs, followed by isotherm and kinetic sorption experiments. A preferred design with CaCO3 to sludge mass ratio of 1:2 was found to have a sorption capacity of 116.82 mg/g for phosphorus. This work reveals the crucial role of well-dispersed nano-rod calcium on the Ca-SC surface for the sorption of phosphorus. Moreover, the decoration of nano-rod calcium was found to further promote the uptake of phosphorus through the formation of hydroxylapatite (Ca5(PO4)3(OH)). Thus, the development of decorated Ca-SC for sorption of phosphorus is very important in solving the P pollution and resource loss.
Collapse
Affiliation(s)
- Lingjun Kong
- School of Environmental Science and Engineering, Guangzhou University, Guangzhou 510006, PR China; Guangdong Provincial Key Laboratory of Radioactive Contamination Control and Resources, Guangzhou 5100056, PR China; Department of Civil Engineering, The University of Hong Kong, Pokfulam Road, Hong Kong, PR China
| | - Meina Han
- School of Environmental Science and Engineering, Guangzhou University, Guangzhou 510006, PR China
| | - Kaimin Shih
- Department of Civil Engineering, The University of Hong Kong, Pokfulam Road, Hong Kong, PR China.
| | - Minhua Su
- School of Environmental Science and Engineering, Guangzhou University, Guangzhou 510006, PR China
| | - Zenghui Diao
- South China Sea Institute of Oceanology, Chinese Academy of Sciences, Guangzhou 510301, PR China
| | - Jianyou Long
- School of Environmental Science and Engineering, Guangzhou University, Guangzhou 510006, PR China; Guangdong Provincial Key Laboratory of Radioactive Contamination Control and Resources, Guangzhou 5100056, PR China
| | - Diyun Chen
- School of Environmental Science and Engineering, Guangzhou University, Guangzhou 510006, PR China; Guangdong Provincial Key Laboratory of Radioactive Contamination Control and Resources, Guangzhou 5100056, PR China.
| | - Li'an Hou
- School of Environmental Science and Engineering, Guangzhou University, Guangzhou 510006, PR China; Guangdong Provincial Key Laboratory of Radioactive Contamination Control and Resources, Guangzhou 5100056, PR China
| | - Yan Peng
- School of Environmental Science and Engineering, Guangzhou University, Guangzhou 510006, PR China; Guangdong Provincial Key Laboratory of Radioactive Contamination Control and Resources, Guangzhou 5100056, PR China
| |
Collapse
|
20
|
Gu L, Li C, Wen H, Zhou P, Zhang D, Zhu N, Tao H. Facile synthesis of magnetic sludge-based carbons by using Electro-Fenton activation and its performance in dye degradation. BIORESOURCE TECHNOLOGY 2017; 241:391-396. [PMID: 28582761 DOI: 10.1016/j.biortech.2017.05.115] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/18/2017] [Revised: 05/16/2017] [Accepted: 05/18/2017] [Indexed: 06/07/2023]
Abstract
Highly stable iron based magnetic carbon were prepared by sequential Electro-Fenton (EF) activation and pyrolysis of sewage sludge. The applied voltage exerts great influence on EF treated sludge flocs and thus poses significant effect on physiochemical properties of the as-prepared carbons. High insertion rate of iron into sludge from EF activation resulted in carbons with highly dispersed iron oxides, which had average size of iron nanoparticles being 4.77nm. The carbon also presented well developed porosity which had Brunauer-Emmett-Teller (BET) surface area attaining 341m2/g. Carbons prepared by traditional Iron Impregnation (IM) were used as comparison to gain further insight into their catalytic role as Fenton-like catalyst. Results showed that EF-activated sludge carbon could yield 96.1% of Methyl Orange (MO) removal in 60min together with only 1.4% of iron leaching. After three cycles, the MO removal can still reach 80% with EF-activated carbons.
Collapse
Affiliation(s)
- Lin Gu
- School of Environment and Architecture, University of Shanghai for Science and Technology, Shanghai 200093, PR China; College of Environmental Science and Technology, Shanghai Jiao Tong University, Shanghai 200240, PR China; China United Northwest Institute for Engineering Design & Research Co., Ltd, Xi'an 710077, PR China
| | - Chengxu Li
- School of Environment and Architecture, University of Shanghai for Science and Technology, Shanghai 200093, PR China
| | - Haifeng Wen
- School of Environment and Architecture, University of Shanghai for Science and Technology, Shanghai 200093, PR China
| | - Pin Zhou
- College of Environmental Science and Technology, Shanghai Jiao Tong University, Shanghai 200240, PR China
| | - Daofang Zhang
- School of Environment and Architecture, University of Shanghai for Science and Technology, Shanghai 200093, PR China.
| | - Nanwen Zhu
- College of Environmental Science and Technology, Shanghai Jiao Tong University, Shanghai 200240, PR China
| | - Hong Tao
- School of Environment and Architecture, University of Shanghai for Science and Technology, Shanghai 200093, PR China
| |
Collapse
|