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Feng M, Li M, Zhang L, Luo Y, Zhao D, Yuan M, Zhang K, Wang F. Oyster Shell Modified Tobacco Straw Biochar: Efficient Phosphate Adsorption at Wide Range of pH Values. INTERNATIONAL JOURNAL OF ENVIRONMENTAL RESEARCH AND PUBLIC HEALTH 2022; 19:7227. [PMID: 35742476 PMCID: PMC9223713 DOI: 10.3390/ijerph19127227] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 05/12/2022] [Revised: 06/05/2022] [Accepted: 06/07/2022] [Indexed: 02/04/2023]
Abstract
In order to improve the phosphate adsorption capacity of Ca-loaded biochar at a wide range of pH values, Ca (oyster shell) was loaded as Ca(OH)2 on the tobacco stalk biochar (Ca-BC), which was prepared by high-temperature calcination, ultrasonic treatment, and stirring impregnation method. The phosphorus removal performance of Ca-BC adsorption was studied by batch adsorption experiments, and the mechanism of Ca-BC adsorption and phosphorus removal was investigated by SEM-EDS, FTIR, and XRD. The results showed that after high-temperature calcination, oyster shells became CaO, then converted into Ca(OH)2 in the process of stirring impregnation and had activated the pore expansion effect of biochar. According to the Langmuir model, the adsorption capacity of Ca-BC for phosphate was 88.64 mg P/g, and the adsorption process followed pseudo-second-order kinetics. The Ca(OH)2 on the surface of biochar under the initial pH acidic condition preferentially neutralizes with H+ acid-base in solution, so that Ca-BC chemically precipitates with phosphate under alkaline conditions, which increases the adsorption capacity by 3-15 times compared with other Ca-loaded biochar. Ca-BC phosphate removal rate of livestock wastewater (pig and cattle farms) is 91~95%, whereas pond and domestic wastewater can be quantitatively removed. This study provides an experimental basis for efficient phosphorus removal by Ca-modified biochar and suggesting possible applications in real wastewater.
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Affiliation(s)
- Menghan Feng
- Agro-Environmental Protection Institute, Ministry of Agriculture and Rural Affairs, Tianjin 300191, China; (M.F.); (M.L.); (L.Z.); (Y.L.); (D.Z.); (M.Y.); (K.Z.)
- Erhai Watershed Ecological Environment Quality Testing Engineering Research Center of Yunnan Provincial Universities, West Yunnan University of Applied Sciences, Dali 671004, China
- Dali Comprehensive Experimental Station of Environmental Protection Research and Monitoring Institute, Ministry of Agriculture and Rural Affairs, Dali 671004, China
| | - Mengmeng Li
- Agro-Environmental Protection Institute, Ministry of Agriculture and Rural Affairs, Tianjin 300191, China; (M.F.); (M.L.); (L.Z.); (Y.L.); (D.Z.); (M.Y.); (K.Z.)
- Dali Comprehensive Experimental Station of Environmental Protection Research and Monitoring Institute, Ministry of Agriculture and Rural Affairs, Dali 671004, China
| | - Lisheng Zhang
- Agro-Environmental Protection Institute, Ministry of Agriculture and Rural Affairs, Tianjin 300191, China; (M.F.); (M.L.); (L.Z.); (Y.L.); (D.Z.); (M.Y.); (K.Z.)
- Erhai Watershed Ecological Environment Quality Testing Engineering Research Center of Yunnan Provincial Universities, West Yunnan University of Applied Sciences, Dali 671004, China
- Dali Comprehensive Experimental Station of Environmental Protection Research and Monitoring Institute, Ministry of Agriculture and Rural Affairs, Dali 671004, China
| | - Yuan Luo
- Agro-Environmental Protection Institute, Ministry of Agriculture and Rural Affairs, Tianjin 300191, China; (M.F.); (M.L.); (L.Z.); (Y.L.); (D.Z.); (M.Y.); (K.Z.)
- Dali Comprehensive Experimental Station of Environmental Protection Research and Monitoring Institute, Ministry of Agriculture and Rural Affairs, Dali 671004, China
| | - Di Zhao
- Agro-Environmental Protection Institute, Ministry of Agriculture and Rural Affairs, Tianjin 300191, China; (M.F.); (M.L.); (L.Z.); (Y.L.); (D.Z.); (M.Y.); (K.Z.)
- Erhai Watershed Ecological Environment Quality Testing Engineering Research Center of Yunnan Provincial Universities, West Yunnan University of Applied Sciences, Dali 671004, China
- Dali Comprehensive Experimental Station of Environmental Protection Research and Monitoring Institute, Ministry of Agriculture and Rural Affairs, Dali 671004, China
| | - Mingyao Yuan
- Agro-Environmental Protection Institute, Ministry of Agriculture and Rural Affairs, Tianjin 300191, China; (M.F.); (M.L.); (L.Z.); (Y.L.); (D.Z.); (M.Y.); (K.Z.)
- Dali Comprehensive Experimental Station of Environmental Protection Research and Monitoring Institute, Ministry of Agriculture and Rural Affairs, Dali 671004, China
- College of Resources and Environment, Yunnan Agricultural University, Kunming 650201, China
| | - Keqiang Zhang
- Agro-Environmental Protection Institute, Ministry of Agriculture and Rural Affairs, Tianjin 300191, China; (M.F.); (M.L.); (L.Z.); (Y.L.); (D.Z.); (M.Y.); (K.Z.)
- Dali Comprehensive Experimental Station of Environmental Protection Research and Monitoring Institute, Ministry of Agriculture and Rural Affairs, Dali 671004, China
| | - Feng Wang
- Agro-Environmental Protection Institute, Ministry of Agriculture and Rural Affairs, Tianjin 300191, China; (M.F.); (M.L.); (L.Z.); (Y.L.); (D.Z.); (M.Y.); (K.Z.)
- Erhai Watershed Ecological Environment Quality Testing Engineering Research Center of Yunnan Provincial Universities, West Yunnan University of Applied Sciences, Dali 671004, China
- Dali Comprehensive Experimental Station of Environmental Protection Research and Monitoring Institute, Ministry of Agriculture and Rural Affairs, Dali 671004, China
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Wang Z, Miao R, Ning P, He L, Guan Q. From wastes to functions: A paper mill sludge-based calcium-containing porous biochar adsorbent for phosphorus removal. J Colloid Interface Sci 2021; 593:434-446. [PMID: 33765625 DOI: 10.1016/j.jcis.2021.02.118] [Citation(s) in RCA: 29] [Impact Index Per Article: 9.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/14/2020] [Revised: 02/08/2021] [Accepted: 02/25/2021] [Indexed: 12/17/2022]
Abstract
With the increased awareness of reusing solid wastes for higher sustainability and the concern of water pollution associated with phosphorus over-emission, there are strong interests in developing solid waste based adsorbents for purifying phosphorus-containing wastewater. As a rich calcium resource, paper mill sludge (i.e., a major solid waste from pulping industry) can be used as phosphorus removal adsorbent after calcination. Thus, in this work, a simple and clean thermally treating route has been proposed for preparing calcium-containing biochar from paper mill sludge. The effect of the physicochemical properties of paper mill sludge and its carbonization condition on phosphorus adsorption has been analyzed. Moreover, the influence of some key adsorption parameters, e.g., biochar dosage, initial pH of solution, co-existing anions, initial phosphorus concentration and contact time has also been investigated. The results showed that the phosphorus adsorption data could be fitted well with pseudo-second-order kinetic and Langmuir isothermal models. The calculated maximum adsorption capacity of the as-prepared optimal calcium-containing biochar could reach to 68.49 mg·g-1 at 25 °C. Combined with the characterization results, it can be reasonably inferred that the adsorption process was chemisorption-dominated. Lastly, the application of this spent adsorbent in agriculture field has also been discussed. In brief, this work provided a feasible strategy for converting paper mill solid waste to an environmental functional material (i.e., calcium-rich biochar) for remediation of eutrophic water.
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Affiliation(s)
- Zhijuan Wang
- Faculty of Environmental Science and Engineering, Kunming University of Science and Technology, 650500 Kunming, China; Faculty of Civil Engineering and Mechanics, Kunming University of Science and Technology, Kunming, China; College of Chemistry and Environmental Science, Qujing Normal University, 655011 Qujing, China
| | - Rongrong Miao
- Faculty of Environmental Science and Engineering, Kunming University of Science and Technology, 650500 Kunming, China
| | - Ping Ning
- Faculty of Environmental Science and Engineering, Kunming University of Science and Technology, 650500 Kunming, China
| | - Liang He
- Faculty of Chemical Engineering, Kunming University of Science and Technology, Kunming, China; The State Key Laboratory of Pulp and Paper Engineering of China, South China University of Technology, 510000 Guangzhou, China.
| | - Qingqing Guan
- Faculty of Environmental Science and Engineering, Kunming University of Science and Technology, 650500 Kunming, China; Faculty of Civil Engineering and Mechanics, Kunming University of Science and Technology, Kunming, China.
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