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Peng J, Xiao Q, Wang Z, Zhou F, Yu J, Chi R, Xiao C. Mechanistic investigation of Pb 2+ adsorption on biochar modified with sodium alginate composite zeolitic imidazolate framework-8. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2024:10.1007/s11356-024-33320-y. [PMID: 38637484 DOI: 10.1007/s11356-024-33320-y] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/06/2023] [Accepted: 04/10/2024] [Indexed: 04/20/2024]
Abstract
For the serious situation of heavy metal pollution, the use of cheap, clean, and efficient biochar to immobilize heavy metals is a good treatment method. In this paper, SA@ZIF-8/BC was prepared for the adsorption of Pb2+ in solution using sodium alginate (SA) and zeolitic imidazolate framework-8 (ZIF-8) modified corn cob biochar. The results showed that the specific surface area of modified biochar was greatly improved, with good adsorption capacity for Pb2+, strong anti-interference ability, and good economy. At the optimal adsorption pH of 5, the adsorption model of Pb2+ by SA@ZIF-8/BC was more consistent with the pseudo-second-order kinetic model and Langmuir isotherm model. This indicates that the adsorption of Pb2+ by SA@ZIF-8/BC is chemisorption and monolayer adsorption. The maximum adsorption of modified biochar was 300 mg g-1, which was 2.38 times higher than that of before modified BC (126 mg g-1). The shift in binding energy of functional groups before and after adsorption of SA@ZIF-8/BC was studied by XPS, and it was found that hydroxyl and carboxyl groups played an important role in the adsorption of Pb2+. It was demonstrated that this novel adsorbent can be effectively used for the treatment of Pb pollution in wastewater.
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Affiliation(s)
- Jun Peng
- Key Laboratory of Novel Biomass-Based Environmental and Energy Materials in Petroleum and Chemical Industry, School of Environmental Ecology and Biological Engineering, Donghu New & High Technology Development Zone, Wuhan Institute of Technology, No. 206, Guanggu 1st Road, Wuhan, 430205, Hubei Province, People's Republic of China
| | - Qian Xiao
- Key Laboratory of Novel Biomass-Based Environmental and Energy Materials in Petroleum and Chemical Industry, School of Environmental Ecology and Biological Engineering, Donghu New & High Technology Development Zone, Wuhan Institute of Technology, No. 206, Guanggu 1st Road, Wuhan, 430205, Hubei Province, People's Republic of China
| | - Ziwei Wang
- Key Laboratory of Novel Biomass-Based Environmental and Energy Materials in Petroleum and Chemical Industry, School of Environmental Ecology and Biological Engineering, Donghu New & High Technology Development Zone, Wuhan Institute of Technology, No. 206, Guanggu 1st Road, Wuhan, 430205, Hubei Province, People's Republic of China
| | - Fang Zhou
- Key Laboratory of Novel Biomass-Based Environmental and Energy Materials in Petroleum and Chemical Industry, School of Environmental Ecology and Biological Engineering, Donghu New & High Technology Development Zone, Wuhan Institute of Technology, No. 206, Guanggu 1st Road, Wuhan, 430205, Hubei Province, People's Republic of China
| | - Junxia Yu
- Key Laboratory of Novel Biomass-Based Environmental and Energy Materials in Petroleum and Chemical Industry, School of Environmental Ecology and Biological Engineering, Donghu New & High Technology Development Zone, Wuhan Institute of Technology, No. 206, Guanggu 1st Road, Wuhan, 430205, Hubei Province, People's Republic of China
| | - Ruan Chi
- Key Laboratory of Novel Biomass-Based Environmental and Energy Materials in Petroleum and Chemical Industry, School of Environmental Ecology and Biological Engineering, Donghu New & High Technology Development Zone, Wuhan Institute of Technology, No. 206, Guanggu 1st Road, Wuhan, 430205, Hubei Province, People's Republic of China
- Hubei Three Gorges Laboratory, Yichang, 443007, China
| | - Chunqiao Xiao
- Key Laboratory of Novel Biomass-Based Environmental and Energy Materials in Petroleum and Chemical Industry, School of Environmental Ecology and Biological Engineering, Donghu New & High Technology Development Zone, Wuhan Institute of Technology, No. 206, Guanggu 1st Road, Wuhan, 430205, Hubei Province, People's Republic of China.
- Hubei Three Gorges Laboratory, Yichang, 443007, China.
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Loc NX, Tuyen PTT, Mai LC, Phuong DTM. Chitosan-Modified Biochar and Unmodified Biochar for Methyl Orange: Adsorption Characteristics and Mechanism Exploration. TOXICS 2022; 10:500. [PMID: 36136465 PMCID: PMC9501881 DOI: 10.3390/toxics10090500] [Citation(s) in RCA: 7] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 08/02/2022] [Revised: 08/16/2022] [Accepted: 08/24/2022] [Indexed: 06/16/2023]
Abstract
In this study, shrimp shell-derived chitosan (CS) and rice husk-derived biochar (RHB) were produced; CS and RHB were then used to synthesize chitosan-modified biochar (CSBC) hydrogel beads. N2 adsorption (77K), SEM-EDX and FT-IR techniques were used to evaluate the physicochemical properties of the adsorbents. A batch experiment was conducted to test the methyl orange (MO) adsorption performance of RHB and CSBC. The results showed that the MO adsorption process was strongly pH-dependent. The kinetics were well described by the pseudo-second-order and intra-particle diffusion models, assuming the chemisorption and intraparticle diffusion mechanisms govern the adsorption process. Homogeneous adsorption for MO on the surface of RHB and CSBC was also assumed since the isotherm data showed the best-fit to the Langmuir model. Under the experimental conditions of initial pH 3, dosage 0.2 g, contact time 240 min and temperature 298 K, the maximum adsorption capacity of CSBC and RHB for MO dye adsorption was 38.75 mg.g-1 and 31.63 mg.g-1, respectively. This result demonstrated that biochar had better performance after modification with chitosan, which provided more functional groups (i.e., -NH2 and -OH groups) for enhanced electrostatic interactions and complexation between MO and CSBC. Overall, CSBC is an effective adsorbent for the removal of MO from aqueous solution.
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Affiliation(s)
- Nguyen Xuan Loc
- Department of Environmental Sciences, College of the Environment and Natural Resources, Can Tho University, Can Tho 900000, Vietnam
| | - Phan Thi Thanh Tuyen
- Department of Environmental Sciences, College of the Environment and Natural Resources, Can Tho University, Can Tho 900000, Vietnam
| | - Le Chi Mai
- Department of Environmental Engineering, College of the Environment and Natural Resources, Can Tho University, Can Tho 900000, Vietnam
| | - Do Thi My Phuong
- Department of Environmental Engineering, College of the Environment and Natural Resources, Can Tho University, Can Tho 900000, Vietnam
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