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Comparative study of calcium alginate, ball-milled biochar, and their composites on aqueousmethylene blue adsorption
Bing Wang;  Bin Gao;  Yongshan Wan
2019
Source PublicationEnvironmental Science and Pollution Research
Volume26Issue:12Pages:11524-11530
Abstract

In this work, a novel composite, ball-milled biochar (BMB) encapsulated in calcium-alginate (CA) beads (CA-BMB), was synthesized as an alternative adsorbent for the removal of methylene blue (MB) from an aqueous solution. Sorption performance was compared among CA, BMB, and CA-BMB composite with batch adsorption experiments. With 25% BMB and 75% alginate, the new composite resembled CA in MB adsorption. With an initial MB concentration of 50 mg L−1, kinetics studies showed that 74% MB removal by CA-BMB was achieved within 8 h, followed by slow kinetics reaching 91% removal in 16 h. The adsorption kinetics was well explained by the Ritchie’s kinetic model, indicative of energetically heterogeneous solid surface of the composite. Adsorption isotherms of BMB, CA, and CA-BMB can all be fitted with the Langmuir models; the adsorption capacity of CA-BMB (1210.7 mg g−1) was close to that of CA (1282.2 mg g−1) and much higher than that of BMB alone (184.1 mg g−1). The outstanding adsorption performance suggested that CA-BMB can serve as a low-cost and eco-friendly adsorbent for MB removal from an aqueous solution.

KeywordBall Mill Biochar Sodium Alginate Methylene Blue Wastewater Adsorption
Indexed BySCI
Language英语
Document Type期刊论文
Identifierhttp://ir.gyig.ac.cn/handle/42920512-1/10231
Collection环境地球化学国家重点实验室
Affiliation1.State Key Laboratory of Environmental Geochemistry, Institute of Geochemistry, Chinese Academy of Sciences, Guiyang 550081, China
2.Department of Agricultural and Biological Engineering, University of Florida, Gainesville, FL 32611, USA
3.Puding Karst Ecosystem Research Station, State Key Laboratory of Environmental Geochemistry, Institute of Geochemistry, Chinese Academy of Sciences, Puding 562100, China
4.National Health and Environmental Effects Research Laboratory, US EPA, Gulf Breeze, FL 32561, USA
Recommended Citation
GB/T 7714
Bing Wang;Bin Gao;Yongshan Wan. Comparative study of calcium alginate, ball-milled biochar, and their composites on aqueousmethylene blue adsorption[J]. Environmental Science and Pollution Research,2019,26(12):11524-11530.
APA Bing Wang;Bin Gao;Yongshan Wan.(2019).Comparative study of calcium alginate, ball-milled biochar, and their composites on aqueousmethylene blue adsorption.Environmental Science and Pollution Research,26(12),11524-11530.
MLA Bing Wang;Bin Gao;Yongshan Wan."Comparative study of calcium alginate, ball-milled biochar, and their composites on aqueousmethylene blue adsorption".Environmental Science and Pollution Research 26.12(2019):11524-11530.
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