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Fei YH, Li M, Ye Z, Guan J, Huang Z, Xiao T, Zhang P. The pH-sensitive sorption governed reduction of Cr(VI) by sludge derived biochar and the accelerating effect of organic acids. JOURNAL OF HAZARDOUS MATERIALS 2022; 423:127205. [PMID: 34844345 DOI: 10.1016/j.jhazmat.2021.127205] [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: 06/02/2021] [Revised: 08/25/2021] [Accepted: 09/08/2021] [Indexed: 06/13/2023]
Abstract
Reduction coupling immobilization is one of the most commonly adopted strategies for the remediation of Cr(VI) contamination. Biochar is a carbon-rich material with abundant active functional groups for sorption and reduction reactions. In previous reports, phytomass derived biochars and organic functional groups have been emphasized, while the performance of sludge derived biochar (SBC) has often been understated. In the present study, a 30 d kinetic study proved that the removal route involved the sorption of Cr(VI), reduction to Cr(III) and immobilization of Cr(III), and that the sorption process was the primary and rate determining step. As a result of the SBC alkalinity, the solution pH increased, and sorption was largely inhibited, which then governed the overall removal ratio. The FTIR spectra suggested the involvement of hydroxyls in these processes. Low molecular weight organic acids accelerated the removal process in the early phase and improved the reduction process.
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Affiliation(s)
- Ying-Heng Fei
- School of Environment Science and Engineering, Guangzhou University, Guangzhou 510006, China.
| | - Manzhi Li
- School of Environment Science and Engineering, Guangzhou University, Guangzhou 510006, China
| | - Zhuofeng Ye
- School of Environment Science and Engineering, Guangzhou University, Guangzhou 510006, China
| | - Jieyang Guan
- School of Environment Science and Engineering, Guangzhou University, Guangzhou 510006, China
| | - Zhenhong Huang
- School of Environment Science and Engineering, Guangzhou University, Guangzhou 510006, China
| | - Tangfu Xiao
- School of Environment Science and Engineering, Guangzhou University, Guangzhou 510006, China
| | - Ping Zhang
- School of Chemical Engineering, Guangzhou University, Guangzhou 510006, China.
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52
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Zhou L, Zhu X, Chi T, Liu B, Du C, Yu G, Wu H, Chen H. Reutilization of manganese enriched biochar derived from Phytolacca acinosa Roxb. residue after phytoremediation for lead and tetracycline removal. BIORESOURCE TECHNOLOGY 2022; 345:126546. [PMID: 34906706 DOI: 10.1016/j.biortech.2021.126546] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/29/2021] [Revised: 12/05/2021] [Accepted: 12/06/2021] [Indexed: 06/14/2023]
Abstract
This study aimed to evaluate the chemical form variation of Mn in Phytolacca acinosa Roxb. residue under different pyrolysis temperatures and its contribution to decontamination efficacy of lead (Pb(II)) and tetracycline (TC). The results illuminated that pyrolysis temperature is a crucial factor of fraction and bioavailability of Mn and other heavy metals in the resultant biochar and pyrolysis temperature under 450 °C may be most suitable for reutilization without potential risk. The Mn-enriched phytolaccaceae biochar (PSB450) exhibited more preferential sorption toward Pb(II) (279.33 mg/g) and TC (47.51 mg/g) than pristine phytolaccaceae biochar in the single system, mainly due to the formation of MnOx and Mn minerals via pyrolysis. Binary adsorption showed that Pb(II) would serve as a bridge between PSB450 and TC by complexation within a limited concentration range, thus facilitating their joint decontamination. This study provided an efficient alternative approach for reutilization of Mn-contaminated biomass.
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Affiliation(s)
- Lu Zhou
- School of Hydraulic and Environmental Engineering, Changsha University of Science and Technology, Changsha 410114, PR China; Key Laboratory of Water-Sediment Sciences and Water Disaster Prevention of Hunan Province, Changsha 410114, PR China
| | - Xiaofang Zhu
- School of Hydraulic and Environmental Engineering, Changsha University of Science and Technology, Changsha 410114, PR China; Key Laboratory of Dongting Lake Aquatic Eco-Environmental Control and Restoration of Hunan Province, Changsha 410114, PR China
| | - Tianying Chi
- School of Hydraulic and Environmental Engineering, Changsha University of Science and Technology, Changsha 410114, PR China; Key Laboratory of Dongting Lake Aquatic Eco-Environmental Control and Restoration of Hunan Province, Changsha 410114, PR China
| | - Bei Liu
- School of Hydraulic and Environmental Engineering, Changsha University of Science and Technology, Changsha 410114, PR China; Key Laboratory of Dongting Lake Aquatic Eco-Environmental Control and Restoration of Hunan Province, Changsha 410114, PR China
| | - Chunyan Du
- School of Hydraulic and Environmental Engineering, Changsha University of Science and Technology, Changsha 410114, PR China; Key Laboratory of Water-Sediment Sciences and Water Disaster Prevention of Hunan Province, Changsha 410114, PR China
| | - Guanlong Yu
- School of Hydraulic and Environmental Engineering, Changsha University of Science and Technology, Changsha 410114, PR China; Key Laboratory of Water-Sediment Sciences and Water Disaster Prevention of Hunan Province, Changsha 410114, PR China
| | - Haipeng Wu
- School of Hydraulic and Environmental Engineering, Changsha University of Science and Technology, Changsha 410114, PR China; Key Laboratory of Water-Sediment Sciences and Water Disaster Prevention of Hunan Province, Changsha 410114, PR China
| | - Hong Chen
- School of Hydraulic and Environmental Engineering, Changsha University of Science and Technology, Changsha 410114, PR China; Key Laboratory of Water-Sediment Sciences and Water Disaster Prevention of Hunan Province, Changsha 410114, PR China.
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53
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Liu M, Almatrafi E, Zhang Y, Xu P, Song B, Zhou C, Zeng G, Zhu Y. A critical review of biochar-based materials for the remediation of heavy metal contaminated environment: Applications and practical evaluations. THE SCIENCE OF THE TOTAL ENVIRONMENT 2022; 806:150531. [PMID: 34844313 DOI: 10.1016/j.scitotenv.2021.150531] [Citation(s) in RCA: 7] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/29/2021] [Revised: 09/18/2021] [Accepted: 09/19/2021] [Indexed: 06/13/2023]
Abstract
The contamination of heavy metals (HMs) in the environment has aroused a global concern. The valid remediation of HM contaminated environment is a highly significant issue. As alternative to carbon materials, biochar has been vastly documented for the remediation of HM contaminated environment. However, there are some possible imperfections to meet the actual remediation tasks as the finite properties of raw biochar, and the remediation process is complex and unexpectedly. This review focuses on the progress made on environmental HM remediation by biochar-based materials within the past six years. The property analysis and key modifications of biochar are summarized inspired by their applicability or necessity for HM decontamination, and the environmental remediation as well as the implicated mechanisms are thoroughly elaborated from multiple pivotal sides. The evaluations of practical application associated with biochar amendment are also presented. Finally, some pertinent improvements and research directions are proposed. To our knowledge, this article is the first time to make a systematic summary on the reliability and practicability of biochar-based materials for environmental HM remediation, and critically pointed out the existing issues to facilitate the judicious design of biochar-based materials and understanding the research trends. It is also aims to provide reference for subsequent research and propel the practical applications.
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Affiliation(s)
- Mengsi Liu
- College of Environmental Science and Engineering, Key Laboratory of Environmental Biology and Pollution Control, Ministry of Education, Hunan University, Changsha, Hunan 410082, PR China; Center of Research Excellence in Renewable Energy and Power Systems, Center of Excellence in Desalination Technology, Department of Mechanical Engineering, Faculty of Engineering-Rabigh, King Abdulaziz University, Jeddah 21589, Saudi Arabia
| | - Eydhah Almatrafi
- Center of Research Excellence in Renewable Energy and Power Systems, Center of Excellence in Desalination Technology, Department of Mechanical Engineering, Faculty of Engineering-Rabigh, King Abdulaziz University, Jeddah 21589, Saudi Arabia
| | - Yi Zhang
- College of Environmental Science and Engineering, Key Laboratory of Environmental Biology and Pollution Control, Ministry of Education, Hunan University, Changsha, Hunan 410082, PR China
| | - Piao Xu
- College of Environmental Science and Engineering, Key Laboratory of Environmental Biology and Pollution Control, Ministry of Education, Hunan University, Changsha, Hunan 410082, PR China
| | - Biao Song
- College of Environmental Science and Engineering, Key Laboratory of Environmental Biology and Pollution Control, Ministry of Education, Hunan University, Changsha, Hunan 410082, PR China; Center of Research Excellence in Renewable Energy and Power Systems, Center of Excellence in Desalination Technology, Department of Mechanical Engineering, Faculty of Engineering-Rabigh, King Abdulaziz University, Jeddah 21589, Saudi Arabia
| | - Chengyun Zhou
- College of Environmental Science and Engineering, Key Laboratory of Environmental Biology and Pollution Control, Ministry of Education, Hunan University, Changsha, Hunan 410082, PR China; Center of Research Excellence in Renewable Energy and Power Systems, Center of Excellence in Desalination Technology, Department of Mechanical Engineering, Faculty of Engineering-Rabigh, King Abdulaziz University, Jeddah 21589, Saudi Arabia
| | - Guangming Zeng
- College of Environmental Science and Engineering, Key Laboratory of Environmental Biology and Pollution Control, Ministry of Education, Hunan University, Changsha, Hunan 410082, PR China; Center of Research Excellence in Renewable Energy and Power Systems, Center of Excellence in Desalination Technology, Department of Mechanical Engineering, Faculty of Engineering-Rabigh, King Abdulaziz University, Jeddah 21589, Saudi Arabia.
| | - Yuan Zhu
- College of Environmental Science and Engineering, Key Laboratory of Environmental Biology and Pollution Control, Ministry of Education, Hunan University, Changsha, Hunan 410082, PR China; Center of Research Excellence in Renewable Energy and Power Systems, Center of Excellence in Desalination Technology, Department of Mechanical Engineering, Faculty of Engineering-Rabigh, King Abdulaziz University, Jeddah 21589, Saudi Arabia.
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54
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A Statistical Modeling and Optimization for Cr(VI) Adsorption from Aqueous Media via Teff Straw-Based Activated Carbon: Isotherm, Kinetics, and Thermodynamic Studies. ADSORPT SCI TECHNOL 2022. [DOI: 10.1155/2022/7998069] [Citation(s) in RCA: 12] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022] Open
Abstract
Currently, the growth of tannery industries causes a significant volume of waste disposal to the environment due to harmful Cr(VI). Long-time exposure to Cr(VI) imposes serious hazards on all living organisms. Hence, the treatment of tannery waste to remove Cr(VI) is not a choice but mandatory. Therefore, this study focused on the removal of Cr(VI) from the aqueous solutions via a teff (Eragrostis tef) straw based-activated carbon (TSAC) which was derived from locally available agricultural solid waste, teff straw (TS). The prepared TSAC was characterized using BET, FTIR, SEM, and XRD. A central composite approach-based RSM analysis was undertaken for statistical modeling and optimization for maximized Cr(VI) removal with respect to four important factors, namely, initial concentration of Cr(VI), the dosage of TSAC, pH, and adsorption time. Optimized values for maximizing adsorption of Cr(VI) (95% of removal) were acquired to be initial Cr(VI) concentration: 87.57 mg/L, TSAC dosage: 2.742 g/100 mL, pH: 2.2, and contact time:109 min. The results from the design of the experiment were also analyzed for the significance of the interaction between the selected process parameters. In addition, the pseudo-second-order kinetic and Langmuir isotherm models were found suitable for describing the adsorption data. The adsorption capacity of Cr(VI) on TSAC was 19.48 mg/g. The observed thermodynamic characteristics reveal that Cr(VI) adsorption on TASC is endothermic in nature. From the results, TSAC had shown a potential Cr(VI) efficiency on optimized process conditions that can be exploited effectively as adsorbent for removal of Cr(VI)-contaminated wastes.
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55
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Campagnolo MA, Celso Gonçalves A, Schwantes D, Dragunski DC, Demetrio T, Deminski LH. Cr(total) Removal Using Chicken Feathers Derived Materials: A Laboratory Study with Adsorption-precipitation in Electroplating Effluents. SEP SCI TECHNOL 2022. [DOI: 10.1080/01496395.2021.2008439] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
Affiliation(s)
- Marcelo Angelo Campagnolo
- Faculdade Educacional de Medianeira (UDC - Medianeira), Curso de Agronomia, Medianeira, Rua Rio Branco, nº 1820, Centro, State of Paraná, Brazil
| | - Affonso Celso Gonçalves
- Universidade Estadual do Oeste do Paraná (Unioeste). Centro de Ciências Médicas e Farmacêuticas. Rua Universitaria, nº 1619, Universitário, Cascavel, State of Paraná, Brazil
| | - Daniel Schwantes
- Pontificia Universidad Católica de Chile (PUC-Chile), Facultad de Agronomía e Ingeniería Forestal. Vicuña Mackenna nº 4860, Macul, Región Metropolitana, Chile
| | - Douglas Cardoso Dragunski
- Universidade Estadual do Oeste do Paraná (Unioeste), Centro de Engenharias e Ciências Exatas. Rua da Faculdade, nº 645, Jardim La Salle, Toledo, State of Paraná, Brazil
| | - Tanicler Demetrio
- Universidade Estadual do Oeste do Paraná (Unioeste). Programa de Pós-graduação em Engenharia de Energia na Agricultura. Rua Universitária, nº 1619, Universitário, Cascavel, State of Paraná, Brazil
| | - Leonardo Henrique Deminski
- Universidade Estadual do Oeste do Paraná (Unioeste). Programa de Pós-graduação em Engenharia de Energia na Agricultura. Rua Universitária, nº 1619, Universitário, Cascavel, State of Paraná, Brazil
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56
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Zhao W, Huang X, Gong J, Ma L, Qian J. Influence of aquifer heterogeneity on Cr(VI) diffusion and removal from groundwater. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2022; 29:3918-3929. [PMID: 34402009 DOI: 10.1007/s11356-021-15803-4] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/30/2021] [Accepted: 07/30/2021] [Indexed: 06/13/2023]
Abstract
Previous studies have indicated aquifer heterogeneity has an important influence on the removal of Cr(VI) in groundwater, but little attention is paid to the effects of aquifer heterogeneity during the process especially under conditions like actual groundwater temperature and hydraulic gradient in the field. Thus, in this study, in situ remediation of Cr(VI)-contaminated shallow groundwater in a sandbox was conducted, and the influences of the heterogeneous aquifer composed of coarse, medium, and fine sand on Cr(VI) diffusion and removal before and after emulsified vegetable oil (EVO) injection were investigated, under the conditions of 19±0.5 °C and hydraulic gradient 3‰. The results show that Cr(VI) diffused consistently with groundwater from top left to bottom right; Cr(VI) spread faster in the horizontal direction than in vertical direction, and the horizontal diffusion of Cr(VI) in coarse, medium, and fine sand was 0.054 m/day, 0.036 m/day, and 0.018 m/day, respectively; a high performance of EVO toward Cr(VI) removal by over 95% was mainly because different concentrations of microorganisms migrated among heterogeneous aquifers vertically and horizontally; compared with coarse and medium sand, fine sand, with a better adsorption capacity and a lower permeability, retained relatively more microorganisms, providing favorable conditions during the remediation; a stable and unified effective removal zone, similar to the shape of Ʃ (approximately 1357.87 cm2), was ultimately formed downstream of the injection well.
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Affiliation(s)
- Weidong Zhao
- School of Resources and Environmental Engineering, Hefei University of Technology, Hefei, 230009, China
| | - Xinxiang Huang
- School of Resources and Environmental Engineering, Hefei University of Technology, Hefei, 230009, China
| | - Jianshi Gong
- Nanjing Geological Survey Center, China Geological Survey, Nanjing, 210016, China
| | - Lei Ma
- School of Resources and Environmental Engineering, Hefei University of Technology, Hefei, 230009, China.
| | - Jiazhong Qian
- School of Resources and Environmental Engineering, Hefei University of Technology, Hefei, 230009, China
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57
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Chen J, Dong X, Cao S, Chen Z, Yang X, Jin J. Multiple chemical modifications and Cd 2+ adsorption characteristics of sludge-based activated carbon. RSC Adv 2022; 12:18559-18571. [PMID: 35799929 PMCID: PMC9219043 DOI: 10.1039/d2ra03268f] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/25/2022] [Accepted: 06/13/2022] [Indexed: 11/21/2022] Open
Abstract
The multiple chemical modifications were carried out to achieve N-doping and pore-making to modify sludge-based activated carbon (SACU–PF′). SACU–PF′ possessed abundant functional groups and high adsorption capacity of Cd2+.
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Affiliation(s)
- Jun Chen
- School of Biology, Food and Environment, Anhui Key Laboratory of Sewage Purification and Eco-restoration Materials, Hefei University, Hefei 230601, P. R. China
- Anhui Guoke Testing Technology Co., LTD, Hefei 230041, P. R. China
| | - Xiaowan Dong
- School of Biology, Food and Environment, Anhui Key Laboratory of Sewage Purification and Eco-restoration Materials, Hefei University, Hefei 230601, P. R. China
| | - Sisi Cao
- School of Biology, Food and Environment, Anhui Key Laboratory of Sewage Purification and Eco-restoration Materials, Hefei University, Hefei 230601, P. R. China
| | - Zhaoming Chen
- School of Biology, Food and Environment, Anhui Key Laboratory of Sewage Purification and Eco-restoration Materials, Hefei University, Hefei 230601, P. R. China
| | - Xiaohong Yang
- School of Biology, Food and Environment, Anhui Key Laboratory of Sewage Purification and Eco-restoration Materials, Hefei University, Hefei 230601, P. R. China
| | - Jie Jin
- School of Biology, Food and Environment, Anhui Key Laboratory of Sewage Purification and Eco-restoration Materials, Hefei University, Hefei 230601, P. R. China
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58
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Iron-Loaded Carbon Aerogels Derived from Bamboo Cellulose Fibers as Efficient Adsorbents for Cr(VI) Removal. Polymers (Basel) 2021; 13:polym13244338. [PMID: 34960889 PMCID: PMC8703939 DOI: 10.3390/polym13244338] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/11/2021] [Revised: 11/30/2021] [Accepted: 12/06/2021] [Indexed: 11/24/2022] Open
Abstract
A unique iron/carbon aerogel (Fe/CA) was prepared via pyrolysis using ferric nitrate and bamboo cellulose fibers as the precursors, which could be used for high-efficiency removal of toxic Cr(VI) from wastewaters. Its composition and crystalline structures were characterized by FTIR, XPS, and XRD. In SEM images, the aerogel was highly porous with abundant interconnected pores, and its carbon-fiber skeleton was evenly covered by iron particles. Such structures greatly promoted both adsorption and redox reaction of Cr(VI) and endowed Fe/CA with a superb adsorption capacity of Cr(VI) (182 mg/g) with a fast adsorption rate (only 8 min to reach adsorption equilibrium), which outperformed many other adsorbents. Furthermore, the adsorption kinetics and isotherms were also investigated. The experiment data could be much better fitted by the pseudo-second-order kinetics model with a high correlating coefficient, suggesting that the Cr(VI) adsorption of Fe/CA was a chemical adsorption process. Meanwhile, the Langmuir model was found to better describe the isotherm curves, which implied the possible monolayer adsorption mechanism. It is noteworthy that the aerogel adsorbent as a bulk material could be easily separated from the water after adsorption, showing high potential in real-world water treatment.
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59
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Li SY, Teng HJ, Guo JZ, Wang YX, Li B. Enhanced removal of Cr(VI) by nitrogen-doped hydrochar prepared from bamboo and ammonium chloride. BIORESOURCE TECHNOLOGY 2021; 342:126028. [PMID: 34582986 DOI: 10.1016/j.biortech.2021.126028] [Citation(s) in RCA: 22] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/29/2021] [Revised: 09/21/2021] [Accepted: 09/23/2021] [Indexed: 06/13/2023]
Abstract
N-doped biochar can effectively eliminate toxic Cr(VI). Here, N-doped hydrochar (NHC) was successfully synthesized by one-pot hydrothermal carbonization (HTC) of NH4Cl and bamboo, and employed to adsorb Cr(VI). The specific surface area, pore volume, and carbon and nitrogen contents of NHC all increase compared with the undoped hydrochar (HC). NH4Cl acts as a cheap nitrogen source to enhance the nitrogen content of hydrochar and as an acid catalyst to accelerate hydrochar carbonization. Adsorption experiments show NHC has higher adsorption capacity than HC for Cr(VI). XPS and FTIR imply the dominant mechanisms of adsorbing Cr(VI) onto two hydrochars are electrostatic attraction, reduction and complexation, but the contributions of surface functional groups in two hydrochars for elimination of Cr(VI) differ. The doped nitrogen in NHC is pivotal in adsorbing and reducing Cr(VI). Hence, NHC prepared from bamboo and NH4Cl by one-step HTC is a cheap and efficient adsorbent to eliminate aqueous Cr(VI).
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Affiliation(s)
- Si-Yuan Li
- Department of Chemistry, Zhejiang A&F University, Hangzhou, Zhejiang 311300, PR China
| | - Hua-Jing Teng
- Department of Chemistry, Zhejiang A&F University, Hangzhou, Zhejiang 311300, PR China
| | - Jian-Zhong Guo
- Department of Chemistry, Zhejiang A&F University, Hangzhou, Zhejiang 311300, PR China
| | - Yu-Xuan Wang
- Department of Chemistry, Zhejiang A&F University, Hangzhou, Zhejiang 311300, PR China
| | - Bing Li
- Department of Chemistry, Zhejiang A&F University, Hangzhou, Zhejiang 311300, PR China.
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60
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Chen Y, Ning P, Miao R, He L, Guan Q. Resource utilization of agricultural residues: one-step preparation of biochar derived from Pennisetum giganteum for efficiently removing chromium from water in a wide pH range. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2021; 28:69381-69392. [PMID: 34302250 DOI: 10.1007/s11356-021-15388-y] [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: 05/26/2021] [Accepted: 07/05/2021] [Indexed: 06/13/2023]
Abstract
Biochars derived from agricultural residues, Pennisetum giganteum, were prepared by a one-step activation method after impregnated with H3PO4. The effects of activation temperature and the H3PO4 impregnation method on the structure and performance of biochar were investigated. The characterization results of XPS, FTIR, and N2 adsorption-desorption showed that the P-containing biochar prepared by the one-step method had a large specific surface area, large pores, and abundant surface functional groups. And, the groups including C-P, O-P, and C-O participated in the adsorption of Cr(VI). Moreover, the target adsorbent has a good removal effect on Cr (VI) in a wide range of pH. The Cr(VI) removal efficiency was more than 55.92% at pH≤9. Interestingly, the adsorption results also showed that the adsorbent could offer acid groups for regulating the pH of the bulk solution and thus keep the adsorption surroundings in a narrow pH range. In addition, the target adsorbent has been proved to have good selective removal of Cr(VI). Even after repeated use for 5 times, the removal capacity of Cr(VI) is still 77.4%. This work provides a simple scheme for the high-value utilization of Pennisetum agricultural solid waste, and also confirms that the biochar activated by phosphoric acid can effectively remove Cr(VI) in the solution with wide pH range.
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Affiliation(s)
- Yao Chen
- Faculty of Civil Engineering and Mechanics, Kunming University of Science and Technology, Kunming, China
- Faculty of Environmental Science and Engineering, Kunming University of Science and Technology, Kunming, China
| | - Ping Ning
- Faculty of Environmental Science and Engineering, Kunming University of Science and Technology, Kunming, China.
| | - Rongrong Miao
- Faculty of Civil Engineering and Mechanics, Kunming University of Science and Technology, Kunming, China
- Faculty of Environmental Science and Engineering, Kunming University of Science and Technology, Kunming, China
| | - Liang He
- Faculty of Chemical Engineering, Kunming University of Science and Technology, Kunming, 650500, Yunnan, China.
| | - Qingqing Guan
- Faculty of Civil Engineering and Mechanics, Kunming University of Science and Technology, Kunming, China.
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61
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Liu YP, Lv YT, Guan JF, Khoso FM, Jiang XY, Chen J, Li WJ, Yu JG. Rational design of three-dimensional graphene/graphene oxide-based architectures for the efficient adsorption of contaminants from aqueous solutions. J Mol Liq 2021. [DOI: 10.1016/j.molliq.2021.117709] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/06/2023]
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62
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Zhou X, Speer RM, Volk L, Hudson LG, Liu KJ. Arsenic co-carcinogenesis: Inhibition of DNA repair and interaction with zinc finger proteins. Semin Cancer Biol 2021; 76:86-98. [PMID: 33984503 PMCID: PMC8578584 DOI: 10.1016/j.semcancer.2021.05.009] [Citation(s) in RCA: 27] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/28/2021] [Revised: 05/05/2021] [Accepted: 05/06/2021] [Indexed: 12/17/2022]
Abstract
Arsenic is widely present in the environment and is associated with various population health risks including cancers. Arsenic exposure at environmentally relevant levels enhances the mutagenic effect of other carcinogens such as ultraviolet radiation. Investigation on the molecular mechanisms could inform the prevention and intervention strategies of arsenic carcinogenesis and co-carcinogenesis. Arsenic inhibition of DNA repair has been demonstrated to be an important mechanism, and certain DNA repair proteins have been identified to be extremely sensitive to arsenic exposure. This review will summarize the recent advances in understanding the mechanisms of arsenic carcinogenesis and co-carcinogenesis, including DNA damage induction and ROS generation, particularly how arsenic inhibits DNA repair through an integrated molecular mechanism which includes its interactions with sensitive zinc finger DNA repair proteins.
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Affiliation(s)
- Xixi Zhou
- Department of Pharmaceutical Sciences, University of New Mexico Health Sciences Center, Albuquerque, NM, 87131, USA
| | - Rachel M Speer
- Department of Pharmaceutical Sciences, University of New Mexico Health Sciences Center, Albuquerque, NM, 87131, USA
| | - Lindsay Volk
- Department of Pharmaceutical Sciences, University of New Mexico Health Sciences Center, Albuquerque, NM, 87131, USA
| | - Laurie G Hudson
- Department of Pharmaceutical Sciences, University of New Mexico Health Sciences Center, Albuquerque, NM, 87131, USA.
| | - Ke Jian Liu
- Department of Pharmaceutical Sciences, University of New Mexico Health Sciences Center, Albuquerque, NM, 87131, USA.
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63
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Fang Y, Yang K, Zhang Y, Peng C, Robledo-Cabrera A, López-Valdivieso A. A new insight into the restriction of Cr(VI) removal performance of activated carbon under neutral pH condition. WATER SCIENCE AND TECHNOLOGY : A JOURNAL OF THE INTERNATIONAL ASSOCIATION ON WATER POLLUTION RESEARCH 2021; 84:2304-2317. [PMID: 34810313 DOI: 10.2166/wst.2021.449] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/13/2023]
Abstract
Activated carbon has been widely used to remove hazardous Cr(VI); however, the impact of Cr2O3 precipitate on gradually declining removal ability as pH increases has received little attention. Herein, to investigate the effect of Cr2O3, SEM-EDX (scanning electron microscope-energy dispersive X-ray analysis) coupling elements mapping of chromium-loaded powdered activated carbon (PAC) revealed that a chromium layer was formed on the PAC exterior after being treated with Cr(VI) at pH 7. XPS (X-ray photoelectron spectroscopy) study confirmed that 69.93% and 39.91% Cr2O3 precipitated on the PAC surface at pH 7 and pH 3, respectively, corresponding to 17.77 mg/g and 20 mg/g removal capacity. Exhausted PAC had a removal efficiency of 92.43% after Cr2O3 being washed by H2SO4 solution, which was much higher than the removal efficiency of 51.27 % after NaOH washing. This further verified that the intrinsically developed Cr2O3 precipitate on PAC under neutral conditions limited the durability of PAC as an adsorbent. Consecutive elution assessments confirmed that adsorption and reduction ability both declined as pH increased. Raman spectroscopy and C 1s spectra of materials demonstrated two distinct Cr(VI) removal mechanisms under pH 3 and pH 7. In conclusion, the exhausted AC after Cr(VI) adsorption can be rejuvenated after the surface coated Cr2O3 is washed by the acid solution, which can expand the longevity of AC and recover Cr(III).
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Affiliation(s)
- Yi Fang
- Instituto de metalurgia, Universidad Autónoma de San Luis Potosí, Av. Sierra Leona 550 C.P. 78210, San Luis Potosí, Mexico; Guangdong Provincial Key Laboratory of Environmental Health and Land Resource, Zhaoqing University, Zhaoqing 526061, China E-mail:
| | - Ke Yang
- Instituto de metalurgia, Universidad Autónoma de San Luis Potosí, Av. Sierra Leona 550 C.P. 78210, San Luis Potosí, Mexico
| | - Yipeng Zhang
- Instituto de metalurgia, Universidad Autónoma de San Luis Potosí, Av. Sierra Leona 550 C.P. 78210, San Luis Potosí, Mexico
| | - Changsheng Peng
- Guangdong Provincial Key Laboratory of Environmental Health and Land Resource, Zhaoqing University, Zhaoqing 526061, China E-mail: ; The Key Lab of Marine Environmental Science and Ecology, Ministry of Education, Ocean University of China, Qingdao 266100, China
| | - Aurora Robledo-Cabrera
- Instituto de metalurgia, Universidad Autónoma de San Luis Potosí, Av. Sierra Leona 550 C.P. 78210, San Luis Potosí, Mexico
| | - Alejandro López-Valdivieso
- Instituto de metalurgia, Universidad Autónoma de San Luis Potosí, Av. Sierra Leona 550 C.P. 78210, San Luis Potosí, Mexico
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64
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Liu X, Wang D, Tang J, Liu F, Wang L. Effect of dissolved biochar on the transfer of antibiotic resistance genes between bacteria. ENVIRONMENTAL POLLUTION (BARKING, ESSEX : 1987) 2021; 288:117718. [PMID: 34274650 DOI: 10.1016/j.envpol.2021.117718] [Citation(s) in RCA: 18] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/06/2021] [Revised: 05/25/2021] [Accepted: 07/03/2021] [Indexed: 06/13/2023]
Abstract
The spread of antibiotic resistance genes (ARGs) is a global environmental issue. Dissolved biochar is more likely to contact bacteria in water, producing ecological risks. This study explored the effects of dissolved biochar on ARGs transfer in bacteria. Conjugative transfer efficiency was significantly different following treatment with different types of dissolved biochar. Typically, humic acid-like substance in dissolved biochar can significantly improve the transfer efficiency of ARGs between bacteria. When the concentration of dissolved biochar was ≤10 mg biochar/mL, humic acid-like substance substantially promoted ARGs transfer. An increase in dissolved biochar concentration weakened the ARGs transfer from humic acid-like substance. The inhibitory effects of small-molecule matters dominated, decreasing conjugative transfer frequency. At a concentration of 100 mg biochar/mL, the conjugative transfer efficiency of all treatments was lower than that of control. Compared with corn straw dissolved biochar, there were more transconjugants in pine sawdust dissolved biochar. Following treatment with 10 mg biochar/mL pine sawdust dissolved biochar, the number of transconjugants was at its maximum; approximately 7.3 folds higher than the control. We also explored mechanisms by which dissolved biochar impacts conjugative transfer. Due to the complex composition of dissolved biochar, its effects on the expression of conjugative transfer-related genes were also dynamic. This study investigates the ecological risk of biochar and guides its scientific application.
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Affiliation(s)
- Xiaomei Liu
- Key Laboratory of Pollution Processes and Environmental Criteria (Ministry of Education), Tianjin Engineering Center of Environmental Diagnosis and Contamination Remediation, College of Environmental Science and Engineering, Nankai University, Tianjin, 300350, China
| | - Dan Wang
- Key Laboratory of Pollution Processes and Environmental Criteria (Ministry of Education), Tianjin Engineering Center of Environmental Diagnosis and Contamination Remediation, College of Environmental Science and Engineering, Nankai University, Tianjin, 300350, China
| | - Jingchun Tang
- Key Laboratory of Pollution Processes and Environmental Criteria (Ministry of Education), Tianjin Engineering Center of Environmental Diagnosis and Contamination Remediation, College of Environmental Science and Engineering, Nankai University, Tianjin, 300350, China.
| | - Feng Liu
- Tianjin Eco-Environmental Comprehensive Support Center, Tianjin, 300191, China
| | - Lan Wang
- Key Laboratory of Pollution Processes and Environmental Criteria (Ministry of Education), Tianjin Engineering Center of Environmental Diagnosis and Contamination Remediation, College of Environmental Science and Engineering, Nankai University, Tianjin, 300350, China
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65
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Wan J, Liu F, Wang G, Liang W, Peng C, Zhang W, Lin K, Yang J. Exploring different mechanisms of biochars in removing hexavalent chromium: Sorption, reduction and electron shuttle. BIORESOURCE TECHNOLOGY 2021; 337:125382. [PMID: 34126357 DOI: 10.1016/j.biortech.2021.125382] [Citation(s) in RCA: 17] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/14/2021] [Revised: 06/01/2021] [Accepted: 06/03/2021] [Indexed: 06/12/2023]
Abstract
The role of different biochars in Cr(VI) removal process is not clear. Two raw materials with distinct components were prepared into biochars at various pyrolysis temperatures. The biochar derived from cotton stark (with less lignin than walnut shell) always had more surface functional groups. The pyrolysis temperature had a significant effect on the biochar. In the sorption experiments, the fitting results of two compartment models showed that slow compartment dominated by surface functional groups plays a leading role in the Cr(VI) removal by low-temperature char, while the contribution of the rapid or slow compartment to the process of high-temperature char was equal. In the experiment of biochar mediated the lactate to reduce Cr(VI), the biochar derived from walnut shell (richer lignin) had better conductivity due to its highly aromatic structure, which could directly transfer electrons. This study indicated that various biochars may play different roles in the Cr(VI) removal process.
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Affiliation(s)
- Jiang Wan
- State Environmental Protection Key Laboratory of Environmental Risk Assessment and Control on Chemical Process, School of Resource and Environmental Engineering, East China University of Science and Technology, Shanghai 200237, China
| | - Fang Liu
- State Environmental Protection Engineering Center for Urban Soil Contamination Control and Remediation, Shanghai Academy of Environmental Sciences, Shanghai 200233, China
| | - Gehui Wang
- State Environmental Protection Key Laboratory of Environmental Risk Assessment and Control on Chemical Process, School of Resource and Environmental Engineering, East China University of Science and Technology, Shanghai 200237, China
| | - Weiyu Liang
- State Environmental Protection Key Laboratory of Environmental Risk Assessment and Control on Chemical Process, School of Resource and Environmental Engineering, East China University of Science and Technology, Shanghai 200237, China
| | - Cheng Peng
- State Environmental Protection Key Laboratory of Environmental Risk Assessment and Control on Chemical Process, School of Resource and Environmental Engineering, East China University of Science and Technology, Shanghai 200237, China
| | - Wei Zhang
- State Environmental Protection Key Laboratory of Environmental Risk Assessment and Control on Chemical Process, School of Resource and Environmental Engineering, East China University of Science and Technology, Shanghai 200237, China.
| | - Kuangfei Lin
- State Environmental Protection Key Laboratory of Environmental Risk Assessment and Control on Chemical Process, School of Resource and Environmental Engineering, East China University of Science and Technology, Shanghai 200237, China
| | - Jie Yang
- State Environmental Protection Engineering Center for Urban Soil Contamination Control and Remediation, Shanghai Academy of Environmental Sciences, Shanghai 200233, China
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66
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Liang L, Xi F, Tan W, Meng X, Hu B, Wang X. Review of organic and inorganic pollutants removal by biochar and biochar-based composites. BIOCHAR 2021; 3:255-281. [DOI: doi.org/10.1007/s42773-021-00101-6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/22/2021] [Accepted: 05/11/2021] [Indexed: 06/25/2023]
Abstract
AbstractBiochar (BC) has exhibited a great potential to remove water contaminants due to its wide availability of raw materials, high surface area, developed pore structure, and low cost. However, the application of BC for water remediation has many limitations. Driven by the intense desire of overcoming unfavorable factors, a growing number of researchers have carried out to produce BC-based composite materials, which not only improved the physicochemical properties of BC, but also obtained a new composite material which combined the advantages of BC and other materials. This article reviewed previous researches on BC and BC-based composite materials, and discussed in terms of the preparation methods, the physicochemical properties, the performance of contaminant removal, and underlying adsorption mechanisms. Then the recent research progress in the removal of inorganic and organic contaminants by BC and BC-based materials was also systematically reviewed. Although BC-based composite materials have shown high performance in inorganic or organic pollutants removal, the potential risks (such as stability and biological toxicity) still need to be noticed and further study. At the end of this review, future prospects for the synthesis and application of BC and BC-based materials were proposed. This review will help the new researchers systematically understand the research progress of BC and BC-based composite materials in environmental remediation.
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67
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Chen N, Cao S, Zhang L, Peng X, Wang X, Ai Z, Zhang L. Structural dependent Cr(VI) adsorption and reduction of biochar: hydrochar versus pyrochar. THE SCIENCE OF THE TOTAL ENVIRONMENT 2021; 783:147084. [PMID: 34088126 DOI: 10.1016/j.scitotenv.2021.147084] [Citation(s) in RCA: 38] [Impact Index Per Article: 12.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/09/2021] [Revised: 04/06/2021] [Accepted: 04/07/2021] [Indexed: 06/12/2023]
Abstract
Hydrochar and pyrochar are two typical biochars, and possess different intrinsic structures and chemical properties as well as pollutant removal abilities. However, their structural dependent pollutant removal performances and the related mechanisms are far less studied. In this study, we systematically compared the Cr(VI) removal processes of hydrochar and pyrochar in dark and under simulated sunlight at pH 5.7 ± 0.1, aiming to clarify the structural dependent Cr(VI) removal of biochar. In dark, hydrochar could remove 19.0% of Cr(VI) only via adsorption within 8 h, less than that (23.5%) of pyrochar via both adsorption and indirect solution •O2- reduction pathway. Although simulated sunlight irradiation could significantly promote the Cr(VI) reduction performances of both hydrochar and pyrochar, the Cr(VI) reduction percentage (88.1%) of hydrochar via both direct surface electron reduction and indirect solution •O2- reduction pathways, was much higher than that (30.2%) of pyrochar only via indirect solution •O2- reduction pathway. This different Cr(VI) reduction pathway of hydrochar and pyrochar was arisen from their structural dependent Cr(VI) adsorption models, as revealed by ATR-FTIR characterization and DFT calculation. More phenolic -OH group on hydrochar surface provided abundant sites for Cr(VI) chemical adsorption to form a strong inner-sphere complex, favoring the interfacial electron transfer for the direct surface Cr(VI) reduction. In contrast, more micropores in pyrochar were responsible for the Cr(VI) physical adsorption via intra-particle and boundary layer diffusion, which hampered the surface Cr(VI) direct reduction because of the weak interfacial interaction between Cr(VI) and pyrochar. This study clarifies the influence of surface structure on the Cr(VI) adsorption and reduction pathways of biochar, and also provides an efficient Cr(VI) removal strategy with sunlight and hydrochar.
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Affiliation(s)
- Na Chen
- Key Laboratory of Pesticide & Chemical Biology of Ministry of Education, Institute of Environmental & Applied Chemistry, College of Chemistry, Central China Normal University, Wuhan 430079, People's Republic of China
| | - Shiyu Cao
- Key Laboratory of Pesticide & Chemical Biology of Ministry of Education, Institute of Environmental & Applied Chemistry, College of Chemistry, Central China Normal University, Wuhan 430079, People's Republic of China
| | - Lin Zhang
- Key Laboratory of Pesticide & Chemical Biology of Ministry of Education, Institute of Environmental & Applied Chemistry, College of Chemistry, Central China Normal University, Wuhan 430079, People's Republic of China
| | - Xing Peng
- Key Laboratory of Pesticide & Chemical Biology of Ministry of Education, Institute of Environmental & Applied Chemistry, College of Chemistry, Central China Normal University, Wuhan 430079, People's Republic of China
| | - Xiaobing Wang
- Key Laboratory of Pesticide & Chemical Biology of Ministry of Education, Institute of Environmental & Applied Chemistry, College of Chemistry, Central China Normal University, Wuhan 430079, People's Republic of China
| | - Zhihui Ai
- Key Laboratory of Pesticide & Chemical Biology of Ministry of Education, Institute of Environmental & Applied Chemistry, College of Chemistry, Central China Normal University, Wuhan 430079, People's Republic of China
| | - Lizhi Zhang
- Key Laboratory of Pesticide & Chemical Biology of Ministry of Education, Institute of Environmental & Applied Chemistry, College of Chemistry, Central China Normal University, Wuhan 430079, People's Republic of China.
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68
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A Novel Manganese-Rich Pokeweed Biochar for Highly Efficient Adsorption of Heavy Metals from Wastewater: Performance, Mechanisms, and Potential Risk Analysis. Processes (Basel) 2021. [DOI: 10.3390/pr9071209] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022] Open
Abstract
A novel manganese-rich pokeweed biochar was prepared at different temperatures from manganese-rich pokeweed plants collected at manganese tailings, resulting in materials identified as BC300, BC400, and BC500. The synthetized biochar materials were investigated as regards their potential for removing Cu2+, Pb2+, and Cd2+, specifically in terms of adsorption performances, adsorption kinetics, adsorption isotherms, and potential environmental pollution risk. The results showed that the sorption process fitted well to the pseudo-second-order kinetic and Langmuir models, and the maximum adsorption capacities of BC500 were 246, 326, and 310 mg·g−1 for Cu2+, Pb2+, and Cd2+ respectively. The physicochemical characteristics of the biochars, and the adsorption mechanisms, were revealed by using scanning electron microscopy-energy spectrometer, elemental analysis, Brunauer–Emmett–Teller techniques, X-ray diffraction, X-ray photoelectron spectroscopy, and Fourier transform infrared spectroscopy. The sorption mechanism of these three heavy metal ions onto biochars included ion exchange, electrostatic adsorption, chemical adsorption, and precipitation. Besides, the potential pollution risk of manganese-rich pokeweed biochars was significantly reduced after pyrolysis. Therefore, it is feasible to transform manganese-rich pokeweed biomass into manganese-rich pokeweed biochar with potential for heavy metals removal, showing high adsorption capacity, recyclability, and low environmental pollution.
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69
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Jayathilake M, Rudra S, Akhtar N, Christy AA. Characterization and Evaluation of Hydrothermal Liquefaction Char from Alkali Lignin in Subcritical Temperatures. MATERIALS 2021; 14:ma14113024. [PMID: 34199518 PMCID: PMC8199676 DOI: 10.3390/ma14113024] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 04/27/2021] [Revised: 05/23/2021] [Accepted: 05/31/2021] [Indexed: 11/23/2022]
Abstract
An evaluation of hydrothermal liquefaction (HTL) char is investigated in this work. Morphological studies, N2 adsorption behavior, FTIR analysis, thermal behavior, and elemental composition are studied. The HTL char yield showed an increase with higher operating temperatures. It increased from 11.02% to 33% when the temperature increased from 573 K to 623 K. At lower temperatures, the residence time showed an impact on the yield, while close to the critical point, residence time became less impactful. Elemental analysis showed that both higher operating temperatures and longer residence times increased the nitrogen content of the chars from 0.32% to 0.51%. FTIR analysis suggested the char became more aromatic with the higher temperatures. The aliphatic groups present diminished drastically with the increasing temperature. Residence time did not show a significant impact as much as the temperature when considering the functional group elimination. An increase in operating temperatures and residence times produced thermally stable chars. HTL char produced at the lowest operating temperature and showed both the highest surface area and pore volume. When temperature and residence time increase, more polyaromatic char is produced due to carbonization.
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Affiliation(s)
- Madhawa Jayathilake
- Department of Engineering and Science, Faculty of Engineering Sciences, University of Agder, 4879 Grimstad, Norway; (M.J.); (N.A.)
| | - Souman Rudra
- Department of Engineering and Science, Faculty of Engineering Sciences, University of Agder, 4879 Grimstad, Norway; (M.J.); (N.A.)
- Correspondence: ; Tel.: +47-37233036
| | - Naureen Akhtar
- Department of Engineering and Science, Faculty of Engineering Sciences, University of Agder, 4879 Grimstad, Norway; (M.J.); (N.A.)
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70
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Bekchanov D, Mukhamediev M, Lieberzeit P, Babojonova G, Botirov S. Polyvinylсhloride‐based anion exchanger for efficient removal of chromium (
VI
) from aqueous solutions. POLYM ADVAN TECHNOL 2021. [DOI: 10.1002/pat.5403] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Affiliation(s)
- Davron Bekchanov
- Faculty for Chemistry, Department of Polymer Chemistry National University of Uzbekistan Tashkent Uzbekistan
| | - Mukhtar Mukhamediev
- Faculty for Chemistry, Department of Polymer Chemistry National University of Uzbekistan Tashkent Uzbekistan
| | - Peter Lieberzeit
- Faculty for Chemistry, Department of Physical Chemistry University of Vienna Vienna Austria
| | - Gulbakhor Babojonova
- Faculty for Chemistry, Department of Polymer Chemistry National University of Uzbekistan Tashkent Uzbekistan
| | - Sunnat Botirov
- Faculty for Chemistry, Department of Polymer Chemistry National University of Uzbekistan Tashkent Uzbekistan
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71
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Medha I, Chandra S, Vanapalli KR, Samal B, Bhattacharya J, Das BK. (3-Aminopropyl)triethoxysilane and iron rice straw biochar composites for the sorption of Cr (VI) and Zn (II) using the extract of heavy metals contaminated soil. THE SCIENCE OF THE TOTAL ENVIRONMENT 2021; 771:144764. [PMID: 33736157 DOI: 10.1016/j.scitotenv.2020.144764] [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: 09/29/2020] [Revised: 12/19/2020] [Accepted: 12/19/2020] [Indexed: 05/04/2023]
Abstract
Heavy metals like Cr (VI), when released into the environment, pose a serious threat to animal and human health. In this study, iron and (3-Aminopropyl)triethoxysilane (APTES) biochar composites were prepared from the biochar, which was produced through the pyrolysis of rice straw at 400 and 600 °C, using the chemical processes with an aim that the doping of pristine biochar structure with the Fe and NH2 radicals would enhance the removal of Cr (VI) and Zn (II) adsorption in both aqueous solution and soil. Both biochar composites were mixed at a rate of 3% (w/w) with the mine soil for the soil incubation test, and after completion of the test, a soil fertility index (SFI) was calculated. Results showed that both iron and APTES biochar composites followed the Langmuir-Freundlich isotherm showing the maximum removal capacity of 100.59 mg/g for Cr (VI) by APTES/SiBC 600 and maximum adsorption capacity of 83.92 mg/g for Zn2+ by Fe/BC 400. The SFI of the mine-soil amended with both Fe and APTES biochar composites were 16.67 and 13.04%, respectively higher than the controlled study. The mitotic index of the A. cepa cells that grew up in the soil amended with Fe/BC and APTES/SiBC were 40.47 and 44.45%, respectively, higher than the controlled study. The results indicated that the incorporation of the Fe and APTES biochar composites in the soil effectively reduced the metal toxicity and improved the soil physicochemical properties. This study opens up the prospects of using biochar composites in contaminated soil and water treatments.
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Affiliation(s)
- Isha Medha
- Department of Mining Engineering, Indian Institute of Technology Kharagpur, West Bengal 721302, India
| | - Subhash Chandra
- School of Environmental Science and Engineering, Indian Institute of Technology Kharagpur, West Bengal 721302, India
| | - Kumar Raja Vanapalli
- School of Environmental Science and Engineering, Indian Institute of Technology Kharagpur, West Bengal 721302, India
| | - Biswajit Samal
- School of Environmental Science and Engineering, Indian Institute of Technology Kharagpur, West Bengal 721302, India
| | - Jayanta Bhattacharya
- Department of Mining Engineering, Indian Institute of Technology Kharagpur, West Bengal 721302, India; School of Environmental Science and Engineering, Indian Institute of Technology Kharagpur, West Bengal 721302, India; Zelence Industries Private Limited, India.
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72
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Jin Y, Zhang M, Jin Z, Wang G, Li R, Zhang X, Liu X, Qu J, Wang H. Characterization of biochars derived from various spent mushroom substrates and evaluation of their adsorption performance of Cu(II) ions from aqueous solution. ENVIRONMENTAL RESEARCH 2021; 196:110323. [PMID: 33098819 DOI: 10.1016/j.envres.2020.110323] [Citation(s) in RCA: 26] [Impact Index Per Article: 8.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/18/2020] [Revised: 10/08/2020] [Accepted: 10/11/2020] [Indexed: 05/22/2023]
Abstract
A total of 16 biochar adsorbents were produced from four types of spent mushroom substrates to investigate the effect of pyrolysis temperature and raw material composition on the Cu(II) adsorption performance of the resulting biochars. It was determined that the pyrolysis temperature and substrate composition markedly influenced the thermal stability, the degree of carbonization, surface functional group content, and structural morphology of the biochars, but did not affect the adsorption isotherms or kinetics. Optimal results were obtained with an initial pH of 5, adsorbent dosage of 1 g/L, Cu(II) concentration of 50 mg/L, and temperature of 25 °C. The four best-performing biochars conformed to the Langmuir isotherm model and followed pseudo-second-order kinetics with maximum Cu(II) adsorption between 52.6 and 65.6 mg/g. Precipitation was the dominant mechanism for Cu(II) adsorption onto Lentinus edodes spent substrate-derived biochar pyrolyzed at 600 °C (LESS600), whereas complexation with surface functional groups was the prominent mechanism of Cu(II) removal by Auricularia auricula spent substrate-derived biochar pyrolyzed at 500 °C (AASS500). The Flammulina velutipes and Pleurotus ostreatus spent substrate-derived biochars pyrolyzed at 600 °C (FVSS600 and POSS600, respectively) removed Cu(II) ions using both precipitation and Cu2+-π complexation interactions. The findings indicate that biochar derived from spent mushroom substrates containing abundant lignin and pyrolyzed at high temperatures (500 or 600 °C) demonstrate effective Cu(II) removal because of the various physico-chemical properties discussed herein.
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Affiliation(s)
- Yu Jin
- School of Resources and Environment, Northeast Agricultural University, Harbin, 150030, China
| | - Meng Zhang
- School of Resources and Environment, Northeast Agricultural University, Harbin, 150030, China
| | - Zonghui Jin
- School of Resources and Environment, Northeast Agricultural University, Harbin, 150030, China
| | - Guoliang Wang
- School of Resources and Environment, Northeast Agricultural University, Harbin, 150030, China
| | - Rui Li
- School of Resources and Environment, Northeast Agricultural University, Harbin, 150030, China
| | - Xu Zhang
- School of Resources and Environment, Northeast Agricultural University, Harbin, 150030, China
| | - Xuesheng Liu
- School of Resources and Environment, Northeast Agricultural University, Harbin, 150030, China
| | - Juanjuan Qu
- School of Resources and Environment, Northeast Agricultural University, Harbin, 150030, China.
| | - Hongmei Wang
- College of Life Science, Shandong Normal University, Jinan, 250014, China
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73
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Jia D, Cai H, Duan Y, Xia J, Guo J. Efficient adsorption to hexavalent chromium by iron oxalate modified D301: Characterization, performance and mechanisms. Chin J Chem Eng 2021. [DOI: 10.1016/j.cjche.2020.06.031] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
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74
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Zheng C, Yang Z, Si M, Zhu F, Yang W, Zhao F, Shi Y. Application of biochars in the remediation of chromium contamination: Fabrication, mechanisms, and interfering species. JOURNAL OF HAZARDOUS MATERIALS 2021; 407:124376. [PMID: 33144008 DOI: 10.1016/j.jhazmat.2020.124376] [Citation(s) in RCA: 57] [Impact Index Per Article: 19.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/20/2020] [Revised: 10/21/2020] [Accepted: 10/22/2020] [Indexed: 05/22/2023]
Abstract
Chromium (Cr) is one of the most toxic pollutants that has accumulated in terrestrial and aqueous systems, posing serious risks towards living beings on a worldwide scale. The immobilization, removal, and detoxification of active Cr from natural environment can be accomplished using multiple advanced materials. Biochar, a carbonaceous pyrolytic product made from biomass waste, is considered as a promising material for the elimination of Cr contamination. The preparation and properties of biochar as well as its remediation process for Cr ions have been well investigated. However, the distinct correlation of the manufacturing, characteristics, and mechanisms involved in the remediation of Cr contamination by various designed biochars is not summarized. Herein, this review provides information about the production, modification, and characteristics of biochars along with their corresponding effects on Cr stabilization. Biochar could be modified via physical, hybrid, chemical, and biological methods. The remediating mechanisms of Cr contamination using biochars involve adsorption, reduction, electron shuttle, and photocatalysis. Moreover, the coexisting ions and organic pollutants change the pattern of the remediating process of biochar in actual Cr contaminated water and soil. Finally, the present limitations and future perspectives are proposed.
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Affiliation(s)
- Chujing Zheng
- School of Metallurgy and Environment, Central South University, Changsha 410083, China
| | - Zhihui Yang
- School of Metallurgy and Environment, Central South University, Changsha 410083, China; Chinese National Engineering Research Center for Control & Treatment of Heavy Metal Pollution, Changsha 410083, China
| | - Mengying Si
- School of Metallurgy and Environment, Central South University, Changsha 410083, China
| | - Feng Zhu
- School of Metallurgy and Environment, Central South University, Changsha 410083, China; Chinese National Engineering Research Center for Control & Treatment of Heavy Metal Pollution, Changsha 410083, China
| | - Weichun Yang
- School of Metallurgy and Environment, Central South University, Changsha 410083, China; Chinese National Engineering Research Center for Control & Treatment of Heavy Metal Pollution, Changsha 410083, China
| | - Feiping Zhao
- School of Metallurgy and Environment, Central South University, Changsha 410083, China; Chinese National Engineering Research Center for Control & Treatment of Heavy Metal Pollution, Changsha 410083, China; School of Engineering Science, LUT University, Sammonkatu 12, FI-50130, Mikkeli, Finland
| | - Yan Shi
- School of Metallurgy and Environment, Central South University, Changsha 410083, China; Chinese National Engineering Research Center for Control & Treatment of Heavy Metal Pollution, Changsha 410083, China.
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Yin Z, Zhu L, Mo F, Li S, Hu D, Chu R, Liu C, Hu C. Preparation of biochar grafted with amino-riched dendrimer by carbonization, magnetization and functional modification for enhanced copper removal. J Taiwan Inst Chem Eng 2021. [DOI: 10.1016/j.jtice.2021.04.014] [Citation(s) in RCA: 13] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/22/2023]
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76
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Herath A, Layne CA, Perez F, Hassan EB, Pittman CU, Mlsna TE. KOH-activated high surface area Douglas Fir biochar for adsorbing aqueous Cr(VI), Pb(II) and Cd(II). CHEMOSPHERE 2021; 269:128409. [PMID: 33069440 DOI: 10.1016/j.chemosphere.2020.128409] [Citation(s) in RCA: 60] [Impact Index Per Article: 20.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/04/2020] [Revised: 09/17/2020] [Accepted: 09/18/2020] [Indexed: 06/11/2023]
Abstract
Biochar has become a popular research topic in sustainable chemistry for use both in agriculture and pollution abatement. To enhance aqueous Cr(VI), Pb(II) and Cd(II) removal efficiency, high surface area (535 m2/g) byproduct Douglas fir biochar (DFBC) from commercial syn-gas production obtained by fast pyrolysis (900-1000 °C, 1-10 s), was subjected to a KOH activation. KOH-activated biochar (KOHBC) underwent a remarkable surface area increase to 1049 m2/g and a three-fold increase in pore volume (BET analysis). Batch sorption studies on KOHBC verses pH revealed that the highest chromium, lead and cadmium removal capacities occurred at pH 2.0, 5.0 and 6.0, respectively. KOHBC exhibited much higher adsorption capacities than unactivated DFBC. Heavy metal loadings onto KOHBC were characterized by scanning electron microscopy, transmission electron microscopy and X-ray photoelectron spectroscopy. Sorption of Cr(VI), Pb(II) and Cd(II) all followed pseudo-second order kinetics and the Langmuir adsorption model. The highest Langmuir adsorption capacities at the respective pH's of maximum adsorption were 140.0 mg g-1 Pb(II), 127.2 mg g-1 Cr(VI) and 29.0 mg g-1 Cd(II). Metal ions spiked into natural and laboratory waste water systems exhibited high sorption capacities. Desorption studies carried out using 0.1 M HCl revealed that Pb(II) adsorption onto the KOHBC surface is reversible. Portions of Cd(II) and Cr(VI) adsorbed strongly onto KOHBC were unable to be desorbed by 0.1 M HCl and 0.1 M NaOH.
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Affiliation(s)
- Amali Herath
- Department of Chemistry, Mississippi State University, Mississippi State, MS, 39762, USA
| | - Cody A Layne
- Department of Chemistry, Mississippi State University, Mississippi State, MS, 39762, USA
| | - Felio Perez
- Material Science Lab, Integrated Microscopy Center, University of Memphis, Memphis, TN, 38152, USA
| | - Ei Barbary Hassan
- Department of Sustainable Biproducts, Mississippi State University, Box 98420, Mississippi State, MS, 39762, USA
| | - Charles U Pittman
- Department of Chemistry, Mississippi State University, Mississippi State, MS, 39762, USA
| | - Todd E Mlsna
- Department of Chemistry, Mississippi State University, Mississippi State, MS, 39762, USA.
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77
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Qiu Y, Zhang Q, Wang Z, Gao B, Fan Z, Li M, Hao H, Wei X, Zhong M. Degradation of anthraquinone dye reactive blue 19 using persulfate activated with Fe/Mn modified biochar: Radical/non-radical mechanisms and fixed-bed reactor study. THE SCIENCE OF THE TOTAL ENVIRONMENT 2021; 758:143584. [PMID: 33272600 DOI: 10.1016/j.scitotenv.2020.143584] [Citation(s) in RCA: 37] [Impact Index Per Article: 12.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/30/2020] [Revised: 10/16/2020] [Accepted: 10/30/2020] [Indexed: 06/12/2023]
Abstract
In this study, a heterogeneous activator was prepared via the Fe/Mn modification of sludge-derived biochar (Fe/MnBC) to achieve high-efficiency activation of persulfate (PS) for reactive blue 19 (RB19) degradation. The morphologies and chemical states of Fe/MnBC were examined by various characterizations. A comprehensive assessment was conducted to reveal the effects of biochar preparation conditions and system reaction conditions. According to the results of scavenger quenching experiments and electron paramagnetic resonance (EPR) testing, the mechanisms of Fe/MnBC combined PS system on RB19 degradation were proposed, including radical and non-radical mechanisms. The formation and involvement of sulfate radical (SO4·-), hydroxyl radical (OH·), and singlet oxygen (1O2) were proved in this system, and Fe(IV)/Mn(VII) was also speculated to participate in the non-radical degradation process. These findings give a new insight into the mechanisms of PS activated by metal-biochar composite. Besides, fixed-bed reactor (FBR) experiments indicated that the Fe/MnBC has considerable PS activation potential for dyes removal. The degradation process was further modeled by the central composite design (CCD-RSM) and artificial neural networks (ANN) methods. The statistical metrics and prediction indicated that the prediction results of ANN model were better than CCD-RSM model, and the ANN model could perfectly predict the reaction process of Fe/MnBC FBR for engineering applications.
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Affiliation(s)
- Yue Qiu
- School of Civil Engineering and Architecture, Wuhan University of Technology, Wuhan 430070, PR China
| | - Qian Zhang
- School of Civil Engineering and Architecture, Wuhan University of Technology, Wuhan 430070, PR China.
| | - Zhihao Wang
- School of Mechanical Engineering and Automation, Harbin Institute of Technology, Shenzhen, Shenzhen 518055, PR China
| | - Bin Gao
- Department of Agricultural and Biological Engineering, University of Florida, Gainesville, FL 32611, United States
| | - Zixi Fan
- Department of Chemical and Environmental Engineering, University of Cincinnati, Cincinnati, OH 45221, United States
| | - Meng Li
- School of Civil Engineering and Architecture, Wuhan University of Technology, Wuhan 430070, PR China
| | - Huiru Hao
- School of Civil Engineering and Architecture, Wuhan University of Technology, Wuhan 430070, PR China
| | - Xiaonan Wei
- School of Civil Engineering and Architecture, Wuhan University of Technology, Wuhan 430070, PR China
| | - Min Zhong
- School of Civil Engineering and Architecture, Wuhan University of Technology, Wuhan 430070, PR China
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78
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Arslanoğlu H, Çiftçi H. Use of sulfuric acid-carbonization materials from grape pulp for the removal of hexavalent chromium (Cr(VI)): mechanism and characterization. INTERNATIONAL JOURNAL OF PHYTOREMEDIATION 2021; 23:1145-1156. [PMID: 33587683 DOI: 10.1080/15226514.2021.1880368] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/12/2023]
Abstract
This study investigated the reduction of hexavalent chromium (Cr(VI)) with sulfur dioxide (SO2) and adsorption of Cr(VI) onto dried grape pulp carbonized with sulfuric acid. Cr(VI) reduction capacities of SO2 were determined. The filtrate was titrated with NaOH solution after shaking and filtering the carbonized material to retain unreacted sulfuric acid (H2SO4). Simple washing recovered 25-38% of the experimental acid at low concentrations. The carbonized material was washed twice with distilled water and then dried at 105 °C and weighed. The carbonized material had a yield of 56.6% (grape pulp/sulfuric acid ratios of 1:2), and the lower the H2SO4 content, the better the yield, suggesting that the higher the acid content, the lower the Cr(VI) content per unit grape pulp. Cr(VI) reduction capacities were 219.5, 195.3, and 190.9 mg Cr(VI)/g-H2SO4 for the grape pulp/sulfuric acid ratios of 1:1, 1:2, and 1:3, respectively. Novelty statement: A carbonaceous material was obtained from grape pulp by carbonizing with concentrated sulfuric acid. The main objective of this study was to evaluate gas, liquid, and solid products or co-products obtained during carbonization process for hexavalent chromium treatment in aqueous solutions. In this context, (a) hexavalent chromium reduction capability of the gas evolved during carbonization was determined, (b) characterization of unreacted acid recovered by washing the carbonized product left after carbonization step was done, (c) carbonaceous adsorbent obtained was characterized and (d) hexavalent chromium adsorption characteristics of carbonaceous material obtained was determined.HIGHLIGHTSReduction and adsorption mechanisms of hexavalent chromium were investigated.A waste recycling method was proposed.The effects of sulfuric acid on carbonization were assessed.The structures and chemical compositions of a carbonized material were evaluated.The carbonized material is a cost-effective porous adsorbent for a clean environment.
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Affiliation(s)
- Hasan Arslanoğlu
- Department of Chemical and Process Engineering, Faculty of Engineering and Architecture, Kırşehir Ahi Evran University, Kırşehir, Turkey
| | - Harun Çiftçi
- Department of Medical Biochemistry, Faculty of Medicine, Kırşehir Ahi Evran University, Kırşehir, Turkey
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79
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Effective sequestration of Congo red dye with ZnO/cotton stalks biochar nanocomposite: MODELING, reusability and stability. JOURNAL OF SAUDI CHEMICAL SOCIETY 2021. [DOI: 10.1016/j.jscs.2020.101176] [Citation(s) in RCA: 25] [Impact Index Per Article: 8.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
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80
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Wu F, Chen L, Hu P, Wang Y, Deng J, Mi B. Industrial alkali lignin-derived biochar as highly efficient and low-cost adsorption material for Pb(II) from aquatic environment. BIORESOURCE TECHNOLOGY 2021; 322:124539. [PMID: 33340951 DOI: 10.1016/j.biortech.2020.124539] [Citation(s) in RCA: 37] [Impact Index Per Article: 12.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/26/2020] [Revised: 12/06/2020] [Accepted: 12/08/2020] [Indexed: 05/06/2023]
Abstract
Developing a cost-effective and high-efficiency biochar is critical in various environmental applications. Lignin-based materials are natural and abundant adsorbents to heavy metals benefited from their special polyphenol structure and physicochemical properties. In this study, adsorption capacities to Pb(II) by alkali lignin (AL) and its biochar derivative (ALB) were comparatively discussed, and the latter exhibited superior adsorption performance, with a maximum adsorption capacity almost twice that of the former, and a much faster absorption rate. The qm value of ALB was significantly superior to that of other reported biochar materials. Pb(II) was mainly adsorbed into ALB in three forms: mineral precipitation, ion exchange, and surface complexation, with complexation and mineral precipitation being the dominant mechanisms of adsorption. This study demonstrates that alkali-lignin derived biochar is a promising material for the remediation of polluted by Pb(II).
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Affiliation(s)
- Fangfang Wu
- School of Chemistry and Materials Science, Hunan Agricultural University, Changsha 410128, China
| | - Long Chen
- School of Chemistry and Materials Science, Hunan Agricultural University, Changsha 410128, China
| | - Peng Hu
- School of Chemistry and Materials Science, Hunan Agricultural University, Changsha 410128, China
| | - Yunxiao Wang
- School of Chemistry and Materials Science, Hunan Agricultural University, Changsha 410128, China
| | - Jie Deng
- School of Chemistry and Materials Science, Hunan Agricultural University, Changsha 410128, China
| | - Baobin Mi
- Research Institute of Vegetables, Hunan Academy of Agriculture Sciences, Changsha 410125, China.
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81
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Surface Functionalization of Biochar from Oil Palm Empty Fruit Bunch through Hydrothermal Process. Processes (Basel) 2021. [DOI: 10.3390/pr9010149] [Citation(s) in RCA: 12] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
Abstract
The use of biochar as an adsorbent for wastewater treatment purposes has been hindered due to its lower surface area compared to activated carbon. Current research on increasing surface functional groups on biochar surfaces to improve its adsorption performance suggests using high chemical concentration and long period of modification. This study solves these problems by focusing on improving surface functionalities of biochar via the hydrothermal functionalization process. Oil palm empty fruit bunch biochar was functionalized using autoclave with nitric acid as the functionalization agent. Functionalized biochar properties such as Brunauer–Emmett–Teller (BET) surface area and surface functional groups were analyzed and compared with untreated biochar. Fourier Transform Infrared (FTIR) spectroscopic analysis shows a significant increase in absorption by oxygen functional groups and is corroborated with energy dispersive X-ray (EDX) analysis. The process does not result in any major change in surface morphology and reduction in surface area value. Methylene blue (MB) adsorption test shows 7 times increase in adsorption performance. These results show that the simple hydrothermal functionalization process successfully functionalizes the biochar surface and improves its performance without affecting its surface area at lower concentration, and shorter time compared to previous studies. This result, with future large-scale experimentation using real-life equipment in palm oil mills, would provide a better technology that can be implemented in the industry.
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82
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Imran M, Iqbal MM, Iqbal J, Shah NS, Khan ZUH, Murtaza B, Amjad M, Ali S, Rizwan M. Synthesis, characterization and application of novel MnO and CuO impregnated biochar composites to sequester arsenic (As) from water: Modeling, thermodynamics and reusability. JOURNAL OF HAZARDOUS MATERIALS 2021; 401:123338. [PMID: 32634661 DOI: 10.1016/j.jhazmat.2020.123338] [Citation(s) in RCA: 63] [Impact Index Per Article: 21.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/15/2020] [Revised: 06/16/2020] [Accepted: 06/27/2020] [Indexed: 06/11/2023]
Abstract
The present study aimed at enhancing the adsorption potential of novel nanocomposites of Sesbania bispinosa biochar (SBC) with copper oxide (SBC/CuO) and manganese oxide nanoparticles (SBC/MnO) for the efficient and inexpensive removal of environmentally concerned contaminant arsenic (As) from contaminated water at batch scale. The scanning electron microscopy (SEM), Fourier transform infrared (FTIR) spectroscopy, energy dispersive X-ray (EDX), X-ray diffraction (XRD) and point of zero charge (PZC) analyses proved successful impregnation of the metallic nanoparticles on SBC surface. The results revealed the maximum As removal (96 %) and adsorption (12.47 mg/g) by SBC/CuO composite at 10 mg As/L, optimum pH-4, dose 1.0 g/L and ambient temperature (25 ± 1.5 °C) as compared with SBC (7.33 mg/g) and SBC/MnO (7.34 mg/g). Among four types of adsorption isotherms, Freundlich isotherm demonstrated best fit with R2 > 0.997. While pseudo second-order kinetic model revealed better agreement with kinetic experimental data as matched with other kinetic models. The thermodynamic results depicted that As adsorption on the as-synthesized adsorbents was endothermic and spontaneous in nature with increased randomness. The SBC/CuO displayed excellent reusability and stability over four adsorption/desorption cycles and proved that the as-synthesized SBC/CuO composite may be the efficient adsorbent for practical removal of As from contaminated water.
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Affiliation(s)
- Muhammad Imran
- Department of Environmental Sciences, COMSATS University Islamabad, Vehari Campus, Vehari 61100, Pakistan
| | - Muhammad Mohsin Iqbal
- Department of Environmental Sciences, COMSATS University Islamabad, Vehari Campus, Vehari 61100, Pakistan
| | - Jibran Iqbal
- College of Natural and Health Sciences, Zayed University, Abu Dhabi, United Arab Emirates
| | - Noor Samad Shah
- Department of Environmental Sciences, COMSATS University Islamabad, Vehari Campus, Vehari 61100, Pakistan
| | - Zia Ul Haq Khan
- Department of Environmental Sciences, COMSATS University Islamabad, Vehari Campus, Vehari 61100, Pakistan
| | - Behzad Murtaza
- Department of Environmental Sciences, COMSATS University Islamabad, Vehari Campus, Vehari 61100, Pakistan
| | - Muhammad Amjad
- Department of Environmental Sciences, COMSATS University Islamabad, Vehari Campus, Vehari 61100, Pakistan
| | - Shafaqat Ali
- Department of Environmental Sciences and Engineering, Government College University, Faisalabad, 38000, Pakistan; Department of Biological Sciences and Technology, China Medical University, Taichung, 40402, Taiwan
| | - Muhammad Rizwan
- Department of Environmental Sciences and Engineering, Government College University, Faisalabad, 38000, Pakistan.
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83
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Yılmaz C, Güzel F. Sorptive removal of copper(II) from water by biochar produced from a novel sustainable feedstock: wild herbs. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2021; 28:995-1005. [PMID: 32827295 DOI: 10.1007/s11356-020-10560-2] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/28/2020] [Accepted: 08/17/2020] [Indexed: 06/11/2023]
Abstract
We have reported the removal performance from the synthetic aqueous solution of copper of a low-cost and eco-friendly biochar (WHC) produced by facile thermal pyrolysis of wild herbs (WH), a new feedstock, at 550 °C under anoxic conditions. The characteristics of WHC were determined by physicochemical techniques. It exhibited a low BET surface area, total pore volume, and mean pore size of 16.45 m2/g, 0.01 cm3/g, and, 2.34 nm respectively. Batch sorption studies were performed by examining the effects of varying pH, WHC dosage, initial Cu(II) concentrations, interaction time, and temperature to determine optimum removal conditions. In modeling of sorption, data were used the pseudo-first- and pseudo-second-order kinetics and the Langmuir and Freundlich isotherm models. The maximum Cu(II) sorption capacity of WHC was 24.21 mg/g. Thermodynamic parameters were computed for predicting the nature of WHC-Cu(II) sorption system.
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Affiliation(s)
- Cumali Yılmaz
- Department of Chemistry, Institute of Science and Technology, Dicle University, 21280, Diyarbakir, Turkey
| | - Fuat Güzel
- Department of Chemistry, Faculty of Education, Dicle University, 21280, Diyarbakır, Turkey.
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84
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Din SU, Khan MS, Hussain S, Imran M, Haq S, Hafeez M, Zain-ul-Abdin, Rehman FU, Chen X. Adsorptive Mechanism of Chromium Adsorption on Siltstone–Nanomagnetite–Biochar Composite. J Inorg Organomet Polym Mater 2021. [DOI: 10.1007/s10904-020-01829-7] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
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85
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Sustainable Chromium (VI) Removal from Contaminated Groundwater Using Nano-Magnetite-Modified Biochar via Rapid Microwave Synthesis. Molecules 2020; 26:molecules26010103. [PMID: 33379377 PMCID: PMC7795963 DOI: 10.3390/molecules26010103] [Citation(s) in RCA: 14] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/20/2020] [Revised: 12/18/2020] [Accepted: 12/22/2020] [Indexed: 11/17/2022] Open
Abstract
This study developed a nano-magnetite-modified biochar material (m-biochar) using a simple and rapid in situ synthesis method via microwave treatment, and systematically investigated the removal capability and mechanism of chromium (VI) by this m-biochar from contaminated groundwater. The m-biochar was fabricated from reed residues and magnetically modified by nano-Fe3O4. The results from scanning electron microscopy (SEM) and X-ray diffraction (XRD) characterisations confirmed the successful doping of nano-Fe3O4 on the biochar with an improved porous structure. The synthesised m-biochar exhibited significantly higher maximum adsorption capacity of 9.92 mg/g compared with that (8.03 mg/g) of the pristine biochar. The adsorption kinetics followed the pseudo-second-order model and the intraparticle diffusion model, which indicated that the overall adsorption rate of Cr(VI) was governed by the processes of chemical adsorption, liquid film diffusion and intramolecular diffusion. The increasing of the pH from 3 to 11 significantly affected the Cr(VI) adsorption, where the capabilities decreased from 9.92 mg/g to 0.435 mg/g and 8.03 mg/g to 0.095 mg/g for the m-biochar and pristine biochar, respectively. Moreover, the adsorption mechanisms of Cr(VI) by m-biochar were evaluated and confirmed to include the pathways of electrostatic adsorption, reduction and complexation. This study highlighted an effective synthesis method to prepare a superior Cr(VI) adsorbent, which could contribute to the effective remediation of heavy metal contaminations in the groundwater.
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86
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Xu S, Li J, Yin Z, Liu S, Bian S, Zhang Y. A highly efficient strategy for enhancing the adsorptive and magnetic capabilities of biochar using Fenton oxidation. BIORESOURCE TECHNOLOGY 2020; 315:123797. [PMID: 32683288 DOI: 10.1016/j.biortech.2020.123797] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/17/2020] [Revised: 07/01/2020] [Accepted: 07/04/2020] [Indexed: 06/11/2023]
Abstract
Fenton modification, involving iron-promoted pyrolysis followed by H2O2 oxidation, was first employed to improve the adsorptive and magnetic capabilities of biochar. Modified biochars were prepared from rubber tree bark and coconut shell through iron-promoted pyrolysis and subsequent H2O2 oxidation, and their adsorption behaviors toward Cr (VI) and MB were evaluated in aqueous solution. The modified biochars pyrolyzed at 300 and 400 ˚C displayed much higher adsorption capabilities than corresponding pristine biochars for Cr (VI) and MB, respectively, ascribing to introduction of COOH, CO and C-O groups by Fenton oxidation. More importantly, saturation magnetization could be enhanced by transforming nonmagnetic iron oxides into γ-Fe2O3 through H2O2 oxidation. The removal of Cr (VI) and MB could be primarily contributed to the adsorption of biochar matrix by reduction/hydrogen bonding/cation exchange/electrostatic interaction and hydrogen bonding/cation exchange/electrostatic interaction, respectively. This would provide a novel and efficient strategy for making highly adsorptive magnetic biochar.
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Affiliation(s)
- Shuang Xu
- Key Laboratory of Ministry of Education for Advanced Materials in Tropical Island Resources, School of Chemical Engineering and Technology, Hainan University, Haikou 570228, PR China
| | - Jihui Li
- Key Laboratory of Ministry of Education for Advanced Materials in Tropical Island Resources, School of Chemical Engineering and Technology, Hainan University, Haikou 570228, PR China; School of Science, Hainan University, Haikou 570228, PR China; Hainan Provincial Key Lab of Fine Chem, School of Chemical Engineering and Technology, Hainan University, Haikou 7570228, PR China.
| | - Zhibing Yin
- Key Laboratory of Ministry of Education for Advanced Materials in Tropical Island Resources, School of Chemical Engineering and Technology, Hainan University, Haikou 570228, PR China
| | - Sen Liu
- Key Laboratory of Ministry of Education for Advanced Materials in Tropical Island Resources, School of Chemical Engineering and Technology, Hainan University, Haikou 570228, PR China
| | - Siyao Bian
- Key Laboratory of Ministry of Education for Advanced Materials in Tropical Island Resources, School of Chemical Engineering and Technology, Hainan University, Haikou 570228, PR China
| | - Yucang Zhang
- Key Laboratory of Ministry of Education for Advanced Materials in Tropical Island Resources, School of Chemical Engineering and Technology, Hainan University, Haikou 570228, PR China
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87
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Hu H, Lv C, Hu A, Wang T, Lu H. Influence of torrefaction intensities on bamboo (Acidosasa longiligula) shoot shell-derived biochar and its application for Tc(VII) reductive immobilization. J Taiwan Inst Chem Eng 2020. [DOI: 10.1016/j.jtice.2020.11.011] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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88
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Li J, He F, Shen X, Hu D, Huang Q. Pyrolyzed fabrication of N/P co-doped biochars from (NH 4) 3PO 4-pretreated coffee shells and appraisement for remedying aqueous Cr(VI) contaminants. BIORESOURCE TECHNOLOGY 2020; 315:123840. [PMID: 32693347 DOI: 10.1016/j.biortech.2020.123840] [Citation(s) in RCA: 33] [Impact Index Per Article: 8.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/01/2020] [Revised: 07/08/2020] [Accepted: 07/10/2020] [Indexed: 06/11/2023]
Abstract
In this study, an agricultural residue-derived biochar was fabricated by pyrolyzing coffee shells using (NH4)3PO4 pretreatment. The influence of pyrolysis temperature on the structure and properties of biochars was investigated. The elemental analysis, spectroscopic and textural studies showed that the biochars were endued sufficient N and P co-doping and large specific surface area by (NH4)3PO4-pretreatment. The appraisement for remedying aqueous Cr(VI) contaminants demonstrated that the N/P co-doped biochars offered high efficiencies above 95% for aqueous Cr(VI) removal. The mechanism investigation displayed that the adsorption and reduction of Cr(VI) were boosted by the synergistic effect between the hierarchical pore structure and the groups related to oxygen, nitrogen and phosphorus. Moreover, the biochar can be readily regenerated by HCl solution soaking for reuses several times. This work should permit for providing a convenient utilization of coffee shell agricultural residues, and the coffee shell-derived biochars supplied potential for remedying Cr(VI) in effluents.
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Affiliation(s)
- Jianqiu Li
- School of Materials and Energy, Yunnan University, Kunming 650091, PR China
| | - Feifei He
- School of Agriculture, Yunnan University, Kunming 650091, PR China
| | - Xiaoyang Shen
- School of Materials and Energy, Yunnan University, Kunming 650091, PR China
| | - Dongwen Hu
- School of Materials and Energy, Yunnan University, Kunming 650091, PR China
| | - Qiang Huang
- School of Materials and Energy, Yunnan University, Kunming 650091, PR China.
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89
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Han TU, Kim J, Kim K. Freezing-accelerated removal of chromate by biochar synthesized from waste rice husk. Sep Purif Technol 2020. [DOI: 10.1016/j.seppur.2020.117233] [Citation(s) in RCA: 17] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
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90
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Guo X, Liu A, Lu J, Niu X, Jiang M, Ma Y, Liu X, Li M. Adsorption Mechanism of Hexavalent Chromium on Biochar: Kinetic, Thermodynamic, and Characterization Studies. ACS OMEGA 2020; 5:27323-27331. [PMID: 33134695 PMCID: PMC7594145 DOI: 10.1021/acsomega.0c03652] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/30/2020] [Accepted: 10/08/2020] [Indexed: 05/04/2023]
Abstract
The adsorption mechanism of Cr6+ on biochar prepared from corn stalks (raw carbon) was studied by extracting the organic components (OC) and inorganic components (IC). Scanning electron microscopy, X-ray diffraction, Fourier transform infrared spectroscopy, and X-ray photoelectron spectroscopy were used to characterize the properties of three kinds of carbon. Kinetic and thermodynamic experiments were performed. The results showed that the experimental data were fitted well by the Freundlich model and the pseudo-second-order kinetic model, and the adsorptions on the three kinds of carbon were all spontaneous, endothermic processes. The adsorption of Cr6+ by biochar was in accordance with a chemisorption process. The adsorption contribution rate of the OC was 97%, which was much higher than that of the IC. Electrostatic attraction and redox reaction were the main mechanisms of adsorption, and among them, the contribution rate of the redox reaction accounted for 61.49%. The reduced Cr3+ could both exchange ions with K+ and dissociate into solution by electrostatic repulsion; the amount of Cr3+ released into the solution was approximately 17.07 mg/g, and the amount of Cr3+ ions exchanged with K+ was 0.29 mg/g. These results further elucidate the adsorption mechanism of Cr6+ by biochar.
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91
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Yi Y, Wang X, Ma J, Ning P. An efficient Egeria najas-derived biochar supported nZVI composite for Cr(VI) removal: Characterization and mechanism investigation based on visual MINTEQ model. ENVIRONMENTAL RESEARCH 2020; 189:109912. [PMID: 32980006 DOI: 10.1016/j.envres.2020.109912] [Citation(s) in RCA: 39] [Impact Index Per Article: 9.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/21/2020] [Revised: 06/29/2020] [Accepted: 07/02/2020] [Indexed: 05/22/2023]
Abstract
Egeria najas is a submerged aquatic plant, and the literatures on resourcification of submerged aquatic plant biochar remain limited. Until now, there has been no study on submerged aquatic plant biochar supported nZVI that is widely applied for removal of diversified contaminants in solution. In this study, an efficient approach to the preparation of Egeria najas-derived biochar supported nZVI composite is first developed for Cr(VI) removal in wastewater. The adsorption behavior and mechanism of Cr(VI) removal on the as-prepared Egeria najas-derived biochar/nZVI (EN@nZVI) composite were investigated. The results of FTIR and XPS indicate that the EN@nZVI surface had many functional groups such as R-COOH, R-OH, R-NH2 and R-C-O-C, etc, which could provide active sites during the adsorption process. The BET results showed that the EN@nZVI had large specific surface area and average pore, which were 142.49 m2/g and 9.85 nm, respectively. EN@nZVI demonstrated high reactivity for Cr(VI) removal. Compared with nZVI, Cr(VI) removal efficiency by EN@nZVI is 50% higher than that of nZVI within 0.5 h. Furthermore, the maximum adsorption capacity of Cr (VI) was 56.79 mg/g and the energy of activation (Ea) was 31.30 kJ/mol. The adsorption process was well described by the pseudo-second order model and Sips adsorption isotherm model. The reaction mechanism of Cr(VI) removal was a multi-step removal mechanism, involving adsorption, surface complex formation, reduction and ion exchange reaction.
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Affiliation(s)
- Yan Yi
- Faculty of Environmental Science and Engineering, Kunming University of Science and Technology, Kunming, 650500, China
| | - Xiangyu Wang
- Faculty of Environmental Science and Engineering, Kunming University of Science and Technology, Kunming, 650500, China.
| | - Jun Ma
- State Key Laboratory of Urban Water Resource and Environment, School of Environment, Harbin Institute of Technology, Harbin, 150090, China
| | - Ping Ning
- Faculty of Environmental Science and Engineering, Kunming University of Science and Technology, Kunming, 650500, China
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92
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Chen J, Gao G, Chen P, Chen K, Wang X, Bai L, Yu C, Zhu A. Integrative Transcriptome and Proteome Analysis Identifies Major Molecular Regulation Pathways Involved in Ramie ( Boehmeria nivea (L.) Gaudich) under Nitrogen and Water Co-Limitation. PLANTS 2020; 9:plants9101267. [PMID: 32992865 PMCID: PMC7650756 DOI: 10.3390/plants9101267] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 09/01/2020] [Revised: 09/22/2020] [Accepted: 09/22/2020] [Indexed: 11/21/2022]
Abstract
Water and N are the most important factors affecting ramie (Boehmeria nivea (L.) Gaudich) growth. In this study, de novo transcriptome assembly and Tandem Mass Tags (TMT) based quantitative proteome analysis of ramie under nitrogen and water co-limitation conditions were performed, and exposed to treatments, including drought and N-deficit (WdNd), proper water but N-deficit (WNd), proper N but drought (WdN), and proper N and water (CK), respectively. A total of 64,848 unigenes (41.92% of total unigenes) were annotated in at least one database, including NCBI non-redundant protein sequences (Nr), Swiss-Prot, Protein family (Pfam), Gene Ontology (GO) and KEGG Orthology (KO), and 4268 protein groups were identified. Most significant changes in transcript levels happened under water-limited conditions, but most significant changes in protein level happened under water-limited conditions only with proper N. Poor correlation between differentially expressed genes (DEGs) and differentially expressed proteins (DEPs) was observed in ramie responding to the treatments. DEG/DEP regulation patterns related to major metabolic processes responding to water and N deficiency were analyzed, including photosynthesis, ethylene responding, glycolysis, and nitrogen metabolism. Moreover, 41 DEGs and 61 DEPs involved in regulating adaptation of ramie under water and N stresses were provided in the study, including DEGs/DEPs related to UDP—glucuronosyhransferase (UGT), ATP synthase, and carbonate dehydratase. The strong dependency of N-response of ramie on water conditions at the gene and protein levels was highlighted. Advices for simultaneously improving water and N efficiency in ramie were also provided, especially in breeding N efficient varieties with drought resistance. This study provided extensive new information on the transcriptome, proteome, their correlation, and diversification in ramie responding to water and N co-limitation.
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Affiliation(s)
- Jikang Chen
- Longping Branch, Graduate School of Hunan University, Changsha 410082, China;
- Institute of Bast Fiber Crops, Chinese Academy of Agricultural Sciences, Changsha 410205, China; (G.G.); (P.C.); (K.C.); (X.W.)
- National Breeding Center for Bast Fiber Crops, Changsha 410125, China
| | - Gang Gao
- Institute of Bast Fiber Crops, Chinese Academy of Agricultural Sciences, Changsha 410205, China; (G.G.); (P.C.); (K.C.); (X.W.)
- National Breeding Center for Bast Fiber Crops, Changsha 410125, China
| | - Ping Chen
- Institute of Bast Fiber Crops, Chinese Academy of Agricultural Sciences, Changsha 410205, China; (G.G.); (P.C.); (K.C.); (X.W.)
- National Breeding Center for Bast Fiber Crops, Changsha 410125, China
| | - Kunmei Chen
- Institute of Bast Fiber Crops, Chinese Academy of Agricultural Sciences, Changsha 410205, China; (G.G.); (P.C.); (K.C.); (X.W.)
- National Breeding Center for Bast Fiber Crops, Changsha 410125, China
| | - Xiaofei Wang
- Institute of Bast Fiber Crops, Chinese Academy of Agricultural Sciences, Changsha 410205, China; (G.G.); (P.C.); (K.C.); (X.W.)
- National Breeding Center for Bast Fiber Crops, Changsha 410125, China
| | - Lianyang Bai
- Longping Branch, Graduate School of Hunan University, Changsha 410082, China;
- Hunan Academy of Agricultural Sciences, Changsha 410125, China
- Correspondence: (L.B.); (C.Y.); (A.Z.); Tel.: +86-0731-84692799 (L.B.); +86-0731-88998511 (C.Y.); +86-0731-88998586 (A.Z.)
| | - Chunming Yu
- Institute of Bast Fiber Crops, Chinese Academy of Agricultural Sciences, Changsha 410205, China; (G.G.); (P.C.); (K.C.); (X.W.)
- National Breeding Center for Bast Fiber Crops, Changsha 410125, China
- Correspondence: (L.B.); (C.Y.); (A.Z.); Tel.: +86-0731-84692799 (L.B.); +86-0731-88998511 (C.Y.); +86-0731-88998586 (A.Z.)
| | - Aiguo Zhu
- Institute of Bast Fiber Crops, Chinese Academy of Agricultural Sciences, Changsha 410205, China; (G.G.); (P.C.); (K.C.); (X.W.)
- National Breeding Center for Bast Fiber Crops, Changsha 410125, China
- Correspondence: (L.B.); (C.Y.); (A.Z.); Tel.: +86-0731-84692799 (L.B.); +86-0731-88998511 (C.Y.); +86-0731-88998586 (A.Z.)
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93
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Nnadozie EC, Ajibade PA. Multifunctional Magnetic Oxide Nanoparticle (MNP) Core-Shell: Review of Synthesis, Structural Studies and Application for Wastewater Treatment. Molecules 2020; 25:E4110. [PMID: 32916776 PMCID: PMC7571024 DOI: 10.3390/molecules25184110] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/13/2020] [Revised: 08/10/2020] [Accepted: 08/14/2020] [Indexed: 12/23/2022] Open
Abstract
The demand for water is predicted to increase significantly over the coming decades; thus, there is a need to develop an inclusive wastewater decontaminator for the effective management and conservation of water. Magnetic oxide nanocomposites have great potentials as global and novel remediators for wastewater treatment, with robust environmental and economic gains. Environment-responsive nanocomposites would offer wide flexibility to harvest and utilize massive untapped natural energy sources to drive a green economy in tandem with the United Nations Sustainable Development Goals. Recent attempts to engineer smart magnetic oxide nanocomposites for wastewater treatment has been reported by several researchers. However, the magnetic properties of superparamagnetic nanocomposite materials and their adsorption properties nexus as fundamental to the design of recyclable nanomaterials are desirable for industrial application. The potentials of facile magnetic recovery, ease of functionalization, reusability, solar responsiveness, biocompatibility and ergonomic design promote the application of magnetic oxide nanocomposites in wastewater treatment. The review makes a holistic attempt to explore magnetic oxide nanocomposites for wastewater treatment; futuristic smart magnetic oxides as an elixir to global water scarcity is expounded. Desirable adsorption parameters and properties of magnetic oxides nanocomposites are explored while considering their fate in biological and environmental media.
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Affiliation(s)
| | - Peter A. Ajibade
- School of Chemistry and Physics, University of Kwazulu-Natal, Private Bag X01, Scottsville Pietermaritzburg 3209, South Africa;
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94
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Seo YD, Oh SY, Rajagopal R, Ryu KS. FeS-biochar and Zn(0)-biochar for remediation of redox-reactive contaminants. RSC Adv 2020; 10:30203-30213. [PMID: 35518218 PMCID: PMC9056297 DOI: 10.1039/d0ra05571a] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/25/2020] [Accepted: 08/06/2020] [Indexed: 01/26/2023] Open
Abstract
To enhance the removal of redox-reactive contaminants, biochars including FeS and Zn(0) were developed via pyrolysis. These biochars significantly promoted the removal of 2,4-dichlorophenol (DCP) by means of sorption and reduction. Compared to direct reduction with FeS and Zn(0), the formation of reduction intermediates and product was enhanced from 21% and 22% of initial DCP concentration to 41% and 52%, respectively. 2,4-Dinitrotoluene (DNT), chromate (CrO42−) and selenate (SeO42−) were also reductively transformed to reduction products (e.g., 2,4-diaminotoluene [DAT], Cr3+, and selenite [SeO32−]) after they sorbed onto the biochars including FeS and Zn(0). Mass recovery as DAT, Cr3+ and selenite was 4–20%, 1–3%, and 10–30% under the given conditions. Electrochemical and X-ray analyses confirmed the reduction capability of the biochars including FeS and Zn(0). Fe and S in the FeS–biochar did not effectively promote the reductive transformation of the contaminants. Contrastingly, the stronger reducer Zn(0) yielded faster reductive transformation of contaminants over the Zn(0)-containing biochar, while not releasing high concentrations of Zn2+ into the aqueous phase. Our results suggest that biochars including Zn(0) may be suitable as dual sorbents/reductants to remediate redox-reactive contaminants in natural environments. To enhance the removal of redox-reactive contaminants, biochars including FeS and Zn(0) were developed via pyrolysis.![]()
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Affiliation(s)
- Yong-Deuk Seo
- Department of Civil and Environmental Engineering, University of Ulsan 93 Daehak-ro, Nam-gu Ulsan 44610 South Korea +82-52-259-2629 +82-52-259-2752
| | - Seok-Young Oh
- Department of Civil and Environmental Engineering, University of Ulsan 93 Daehak-ro, Nam-gu Ulsan 44610 South Korea +82-52-259-2629 +82-52-259-2752
| | - Rajesh Rajagopal
- Department of Chemistry, University of Ulsan Ulsan 44610 South Korea
| | - Kwang-Sun Ryu
- Department of Chemistry, University of Ulsan Ulsan 44610 South Korea
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95
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Wang Y, Yang Q, Chen J, Yang J, Zhang Y, Chen Y, Li X, Du W, Liang A, Ho SH, Chang JS. Adsorption behavior of Cr(VI) by magnetically modified Enteromorpha prolifera based biochar and the toxicity analysis. JOURNAL OF HAZARDOUS MATERIALS 2020; 395:122658. [PMID: 32305719 DOI: 10.1016/j.jhazmat.2020.122658] [Citation(s) in RCA: 44] [Impact Index Per Article: 11.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/25/2020] [Revised: 03/31/2020] [Accepted: 04/03/2020] [Indexed: 05/18/2023]
Abstract
Enteromorpha prolifera (EP) biomass collected from a lake in China was employed for biochar production. The EP biochar was magnetically modified by loading γ-Fe2O3 particles on the surface, and Cr(VI) adsorption behavior and mechanism were evaluated. The magnetic biochar had higher surface polarity, specific surface area and exhibited a higher Cr(VI) adsorption capacity of 95.23 mg/g biochar compared with pristine EP biochar. The pronounced electron spin resonance (ESR) signals showed that the environmental persistent free radicals (EPFRs) preferred to form at lower pyrolysis temperature and lower transition metal concentration. The g factors of BC400, BC800 and BCF400 were 1.8959, 1.7955 and 1.7954, respectively, indicating that the EPFRs mainly used carbon atom as center. In addition, biological toxicity of magnetic EP biochar was tested using the microalga Scenedesmus obliquus. Exposure of S. obliquus cells to magnetic biochar led to the accumulation of reactive oxygen species (ROS) and oxidative stress. The leaching solution toxicity of BCF400 was stronger than BCF800. Thus, the magnetic EP biochar prepared at higher temperature (such as BCF800) provide better Cr (VI) performance with low biologic toxicity. And the EP biomass could be a promising low-cost feedstock for biochar production.
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Affiliation(s)
- Yue Wang
- School of Materials and environmental engineering, Yantai University, Yantai, China
| | - Qixia Yang
- School of Materials and environmental engineering, Yantai University, Yantai, China
| | - Jiacheng Chen
- School of Materials and environmental engineering, Yantai University, Yantai, China
| | - Jingjie Yang
- School of Materials and environmental engineering, Yantai University, Yantai, China
| | - Yuping Zhang
- School of Materials and environmental engineering, Yantai University, Yantai, China
| | - Yidi Chen
- School of Civil and Environmental Engineering, Harbin Institute of Technology (Shenzhen), Shenzhen, Guangdong, 518055, China
| | - Xiaoqiang Li
- School of Materials and environmental engineering, Yantai University, Yantai, China
| | - Wei Du
- School of Materials and environmental engineering, Yantai University, Yantai, China
| | - Aiping Liang
- School of Materials and environmental engineering, Yantai University, Yantai, China
| | - Shih-Hsin Ho
- State Key Laboratory of Urban Water Resource and Environment, Harbin Institute of Technology, Harbin, China
| | - Jo-Shu Chang
- Department of Chemical and Materials Engineering, College of Engineering, Tunghai University, Taichung, Taiwan; Center for Nanotechnology, Tunghai University, Taichung, Taiwan; Department of Chemical Engineering, National Cheng Kung University, Tainan, Taiwan.
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96
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Wang Y, Liu H, Wang S, Li X, Wang X, Jia Y. Simultaneous removal and oxidation of arsenic from water by δ-MnO 2 modified activated carbon. J Environ Sci (China) 2020; 94:147-160. [PMID: 32563479 DOI: 10.1016/j.jes.2020.03.006] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/08/2020] [Revised: 03/06/2020] [Accepted: 03/06/2020] [Indexed: 06/11/2023]
Abstract
The ubiquitous arsenic in groundwater poses a great risk to human health due to its environmental toxicity and carcinogenicity. In the present work, a new adsorbent, δ-MnO2 modified activated carbon, was prepared, and its performance for the uptake of arsenate and arsenite species from aqueous solutions was investigated by batch experiments. Various techniques, including FESEM-EDX, p-XRD, XPS and BET surface area analysis, were employed to characterize the properties of the adsorbent and the arsenic adsorption mechanisms. The results showed that δ-MnO2 covered on the surface and padded in the pores of the activated carbon. Adsorption kinetic studies revealed that approximately 90.1% and 76.8% of As(III) and As(V), respectively, were removed by the adsorbent in the first 9 hr, and adsorption achieved equilibrium within 48 hr. The maximum adsorption capacities of As(V) and As(III) at pH 4.0 calculated from Langmuir adsorption isotherms were 13.30 and 12.56 mg/g, respectively. The effect of pH on As(V) and As(III) removal was similar, and the removal efficiency significantly reduced with the increase of solution pH. Arsenite oxidation and adsorption kinetics showed that the As(V) concentration in solution due to As(III) oxidation and reductive dissolution of MnO2 increased rapidly during the first 12 min, and then gradually decreased. Based on the XPS analysis, nearly 93.3% of As(III) had been oxidized to As(V) on the adsorbent surface and around 38.9% of Mn(IV) had been reduced to Mn(II) after As(III) adsorption. This approach provides a possible method for the purification of arsenic-contaminated groundwater.
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Affiliation(s)
- Yulong Wang
- Key Laboratory of Geospatial Technology for the Middle and Lower Yellow River Regions, College of Environment and Planning, Henan University, Kaifeng 475004, China; Key Laboratory of Pollution Ecology and Environmental Engineering, Institute of Applied Ecology, Chinese Academy of Sciences, Shenyang 110016, China; National Demonstration Center for Environmental and Planning, Henan University, Kaifeng 475004, China.
| | - Hupeng Liu
- Key Laboratory of Geospatial Technology for the Middle and Lower Yellow River Regions, College of Environment and Planning, Henan University, Kaifeng 475004, China
| | - Shaofeng Wang
- Key Laboratory of Pollution Ecology and Environmental Engineering, Institute of Applied Ecology, Chinese Academy of Sciences, Shenyang 110016, China.
| | - Xuhui Li
- Key Laboratory of Geospatial Technology for the Middle and Lower Yellow River Regions, College of Environment and Planning, Henan University, Kaifeng 475004, China; National Demonstration Center for Environmental and Planning, Henan University, Kaifeng 475004, China.
| | - Xin Wang
- Key Laboratory of Pollution Ecology and Environmental Engineering, Institute of Applied Ecology, Chinese Academy of Sciences, Shenyang 110016, China
| | - Yongfeng Jia
- Key Laboratory of Pollution Ecology and Environmental Engineering, Institute of Applied Ecology, Chinese Academy of Sciences, Shenyang 110016, China
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97
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Li F, Duan F, Ji W, Gui X. Biochar-activated persulfate for organic contaminants removal: Efficiency, mechanisms and influencing factors. ECOTOXICOLOGY AND ENVIRONMENTAL SAFETY 2020; 198:110653. [PMID: 32325258 DOI: 10.1016/j.ecoenv.2020.110653] [Citation(s) in RCA: 28] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/02/2020] [Revised: 03/09/2020] [Accepted: 04/15/2020] [Indexed: 06/11/2023]
Abstract
Turning biomass into biochar as a multifunctional carbon-based material for water remediation has attracted much research attention. Sawdust and rice husk were selected as feedstock for biochar (BC) production, aiming to explore their performance as a catalyst to activate persulfate (PS) for degrading acid orange 7 (AO7). There was an excellent synergistic effect in the combined BC/PS system. Sawdust biochar (MX) showed a faster and more efficient performance for the AO7 degradation due to its abundant oxygen functional groups, compared to rice husk biochar (DK). In the BC/PS system, AO7 was well decolorized and mineralized. Based on the two-dimensional correlation analysis method, the azo conjugation structure and naphthalene ring of AO7 molecule changed first then benzene ring changed during the reaction. Moreover, AO7 decolorization efficiency increased with the increase of PS concentration and biochar dosage, and the deacrease of pH. Biochar deactivated after used twice. When the biochar reached its adsorption equilibrium of AO7, the AO7 could not be degraded in the BC/PS system. SO4- and OH participated in the reaction together and OH played the main role in activating PS to AO7 decolorization based on the radical scavengers experiment. All of results indicate using biochar to activate PS for degradation of AO7 contaminated water is a promising method.
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Affiliation(s)
- Feiyue Li
- College of Resources and Environment Science, Anhui Science and Technology University, Fengyang, 233100, China.
| | - Fanglei Duan
- School of Chemical and Environmental Engineering, Shanghai Institute of Technology, Shanghai, 201418, China
| | - Wenchao Ji
- College of Resources and Environment Science, Anhui Science and Technology University, Fengyang, 233100, China; Anhui Province Key Laboratory of Biochar and Cropland Pollution Prevention, Anhui Laimujia Biotechnology Co., Ltd., Huaiyuan, 233000, China
| | - Xiangyang Gui
- College of Resources and Environment Science, Anhui Science and Technology University, Fengyang, 233100, China
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98
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Zhu S, Huang X, Yang X, Peng P, Li Z, Jin C. Enhanced Transformation of Cr(VI) by Heterocyclic-N within Nitrogen-Doped Biochar: Impact of Surface Modulatory Persistent Free Radicals (PFRs). ENVIRONMENTAL SCIENCE & TECHNOLOGY 2020; 54:8123-8132. [PMID: 32491842 DOI: 10.1021/acs.est.0c02713] [Citation(s) in RCA: 54] [Impact Index Per Article: 13.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/28/2023]
Abstract
Redox processes mediated by biochar(BC) enhanced the transformation of Cr(VI), which is largely dependent on the presence of PFRs as electron donors. Natural or artificial dopants in BC's could regulate inherent carbon configuration and PFRs. Until recently, the modulation of PFRs and transformation of Cr(VI) in BC by nonmetal-heterocyclic dopants was barely studied. In this study, changes in PFRs introduced by various nitrogen-dopants within BC are presented and the capacity for Cr(VI) transformation without light was investigated. It was found N-dopants were effectively embedded in carbon lattices through activated-Maillard reaction thus altering their charge and PFRs. Transformation of Cr(VI) in N doped biochar relied on mediated direct reduction by surface modulatory PFRs. The kinetic rate of transformation of Cr(VI) was increased 1.4-5 fold in N-BCs compared to nondoped BCs. Theortical calculation suggested a deficiency in surface electrons induced Lewis acid-base bonding which could acted as a bridge for electron transfer. Results of PCA and orbital energy indicated a colinear relationship between PFRs and pyrrolic N, as well as its dual-mode transformation of Cr(VI). This study provides an improved understanding of how N-doped BC contributes to the evolution of PFRs and their corresponding impacts on the transformation of Cr(VI) in environments.
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Affiliation(s)
- Shishu Zhu
- School of Environmental Science and Engineering, Sun Yat-Sen University, Guangzhou 510275, PR China
- Guangdong Provincial Key Laboratory of Environmental Pollution Control and Remediation Technology, Sun Yat-Sen University, Guangzhou 510275, PR China
| | - Xiaochen Huang
- School of Environment, Guangdong Key Laboratory of Environmental Pollution and Health, Jinan University, Guangzhou, 510632, China
| | - Xiaobao Yang
- Department of Physics, South China University of Technology, Guangzhou 510640, P. R. China
| | - Peng Peng
- Department of Mechanics and Mechatronics Engineering, University of Waterloo, Waterloo, Ontario N2L 3G1, Canada
| | - Zhipeng Li
- School of Marine Science and Technology, Harbin Institute of Technology at Weihai, Weihai 264209, China
| | - Chao Jin
- School of Environmental Science and Engineering, Sun Yat-Sen University, Guangzhou 510275, PR China
- Guangdong Provincial Key Laboratory of Environmental Pollution Control and Remediation Technology, Sun Yat-Sen University, Guangzhou 510275, PR China
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99
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Wang Z, Li T, Fu Q, Liu D, Hou R, Li Q, Guo X. Regulation of Cu and Zn migration in soil by biochar during snowmelt. ENVIRONMENTAL RESEARCH 2020; 186:109566. [PMID: 32344212 DOI: 10.1016/j.envres.2020.109566] [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: 02/16/2020] [Revised: 04/16/2020] [Accepted: 04/20/2020] [Indexed: 06/11/2023]
Abstract
To study the migration characteristics of the heavy metals Cu and Zn carried by snowmelt water infiltrating soil during snowmelt periods and the regulation of this process by biochar, field experiments were carried out in which the variation in the Cu and Zn contents in soils on bare land (S1) and in soils with biochar coverage (S2) were analysed before snowfall and during snowmelt periods, and the degree of Cu and Zn pollution was determined on the basis of the enrichment factor (EF) and index of geoaccumulation (Igeo). The migration characteristics of Cu and Zn in soil were studied by combining the migration coefficient and leaching ratio. During the snowmelt period, the use of biochar reduced the migration coefficients of Cu and Zn carried by snowmelt water in shallow soil. The transport coefficients (Tj) of Cu and Zn in shallow soil (0-30 cm) in the S2 treatment were 0.89 and 0.81, respectively, lower than those in the S1 treatment. In addition, during the snowmelt period, the leaching ratios (Cij) of Cu and Zn in the 0-10 cm soil layer of the S2 treatment were 0.22 and 0.24 less than those of the S1 treatment, the index of geoaccumulation (Igeo) was 0.52 and 0.23 less, and the enrichment factor (EF) was 1.20 and 0.09 less, respectively. This study provides practical and theoretical guidance for future research on soil heavy metal pollution mitigation.
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Affiliation(s)
- Zhen Wang
- School of Water Conservancy & Civil Engineering, Northeast Agricultural University, Harbin, 150030, China
| | - Tianxiao Li
- School of Water Conservancy & Civil Engineering, Northeast Agricultural University, Harbin, 150030, China; Key Laboratory of Effective Utilization of Agricultural Water Resources of Ministry of Agriculture, Northeast Agricultural University, Harbin, Heilongjiang, 150030, China; Heilongjiang Provincial Key Laboratory of Water Resources and Water Conservancy Engineering in Cold Region, Northeast Agricultural University, Harbin, Heilongjiang, 150030, China
| | - Qiang Fu
- School of Water Conservancy & Civil Engineering, Northeast Agricultural University, Harbin, 150030, China; Key Laboratory of Effective Utilization of Agricultural Water Resources of Ministry of Agriculture, Northeast Agricultural University, Harbin, Heilongjiang, 150030, China; Heilongjiang Provincial Key Laboratory of Water Resources and Water Conservancy Engineering in Cold Region, Northeast Agricultural University, Harbin, Heilongjiang, 150030, China.
| | - Dong Liu
- School of Water Conservancy & Civil Engineering, Northeast Agricultural University, Harbin, 150030, China; Key Laboratory of Effective Utilization of Agricultural Water Resources of Ministry of Agriculture, Northeast Agricultural University, Harbin, Heilongjiang, 150030, China; Heilongjiang Provincial Key Laboratory of Water Resources and Water Conservancy Engineering in Cold Region, Northeast Agricultural University, Harbin, Heilongjiang, 150030, China
| | - Renjie Hou
- School of Environment, Tsinghua University, Beijing, 100875, China
| | - Qinglin Li
- School of Water Conservancy & Civil Engineering, Northeast Agricultural University, Harbin, 150030, China
| | - Xinxin Guo
- School of Public Administration and Law, Northeast Agricultural University, Harbin, 150030, China
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100
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Jin R, Liu Y, Liu G, Liu L, Zhou J. Influence of chromate adsorption and reduction on transport and retention of biochar colloids in saturated porous media. Colloids Surf A Physicochem Eng Asp 2020. [DOI: 10.1016/j.colsurfa.2020.124791] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
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