SCI和EI收录∣中国化工学会会刊

中国化学工程学报 ›› 2024, Vol. 72 ›› Issue (8): 141-152.DOI: 10.1016/j.cjche.2024.06.005

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Characteristics and mechanism of Ni2+ and Cd2+ adsorption by recovered perlite from agar extraction residue

Juan Wang1, Yanbing Zhu1,2,3, Zedong Jiang1,2,3, Xiping Du1,2,3, Mingjing Zheng1,2,3, Lijun Li1,2,3, Hui Ni1,2,3,4, Yuanpeng Wang5, Zhipeng Li1,2,3, Qingbiao Li1,2,3   

  1. 1 College of Ocean Food and Biological Engineering, Jimei University, Xiamen 361021, China;
    2 Fujian Provincial Key Laboratory of Food Microbiology and Enzyme Engineering, Xiamen 361021, China;
    3 Research Center of Food Biotechnology of Xiamen City, Xiamen 361021, China;
    4 Xiamen Ocean Vocational College, Xiamen 361021, China;
    5 College of Chemistry and Chemical Engineering, Xiamen University, Xiamen 361021, China
  • 收稿日期:2023-11-28 修回日期:2024-05-21 出版日期:2024-08-28 发布日期:2024-10-17
  • 通讯作者: Zhipeng Li,E-mail:lzp2019@jmu.edu.cn;Qingbiao Li,E-mail:qbli@jmu.edu.cn
  • 基金资助:
    This work was financially supported by National Natural Science Foundation of China (22038012, 32172339, and 22178142) and National Key Research and Development Program (2023YFD2100603).

Characteristics and mechanism of Ni2+ and Cd2+ adsorption by recovered perlite from agar extraction residue

Juan Wang1, Yanbing Zhu1,2,3, Zedong Jiang1,2,3, Xiping Du1,2,3, Mingjing Zheng1,2,3, Lijun Li1,2,3, Hui Ni1,2,3,4, Yuanpeng Wang5, Zhipeng Li1,2,3, Qingbiao Li1,2,3   

  1. 1 College of Ocean Food and Biological Engineering, Jimei University, Xiamen 361021, China;
    2 Fujian Provincial Key Laboratory of Food Microbiology and Enzyme Engineering, Xiamen 361021, China;
    3 Research Center of Food Biotechnology of Xiamen City, Xiamen 361021, China;
    4 Xiamen Ocean Vocational College, Xiamen 361021, China;
    5 College of Chemistry and Chemical Engineering, Xiamen University, Xiamen 361021, China
  • Received:2023-11-28 Revised:2024-05-21 Online:2024-08-28 Published:2024-10-17
  • Contact: Zhipeng Li,E-mail:lzp2019@jmu.edu.cn;Qingbiao Li,E-mail:qbli@jmu.edu.cn
  • Supported by:
    This work was financially supported by National Natural Science Foundation of China (22038012, 32172339, and 22178142) and National Key Research and Development Program (2023YFD2100603).

摘要: Ni2+ and Cd2+ in wastewater accumulated through the ecological chain and could jeopardize human health. Adsorption of Ni2+ and Cd2+ from wastewater using recovered perlite was an important way to solve the problem of resource utilization of solid waste from agar production. Our previous study confirmed that recovered perlite from agar extraction residue had better pore size and specific surface area than commercial perlite. However, the adsorption efficiency and adsorption mechanism of recovered perlite were the main factors limiting its adsorption application. The adsorption process of Ni2+ and Cd2+ by recovered perlite in aqueous solution was described by the pseudo-second-order kinetic equation, and the relevant adsorption mechanism was mainly chemisorption. Compared with commercial perlite, the adsorption removal rate of Ni2+ and Cd2+ by enzymatic recovered perlite could reach 92.9% and 89.2%, respectively, and were improved by 12.63% and 13.03%. Langmuir isothermal adsorption model could better describe the isothermal adsorption process of recovered perlite on heavy metal Ni2+ and Cd2+, and the relevant adsorption mechanism was mainly monolayer adsorption. The X-ray photoelectron spectroscopy (XPS) results indicated that the decrease of Si-O Si2+ hydroxyl coordination bond and the increase of C-Si bond might make the binding effect of recovered perlite with heavy metals stronger. The competitive adsorption of Ni2+ and Cd2+ by recovered perlite was still dominated by chemisorption and monolayer adsorption. This study was expected to provide a theoretical basis and technical support for the removal of Ni2+ and Cd2+ from wastewater using recovered perlite from seaweed residue.

关键词: Agar extraction residue, Recovered perlite, Heavy metal ion, Adsorption property

Abstract: Ni2+ and Cd2+ in wastewater accumulated through the ecological chain and could jeopardize human health. Adsorption of Ni2+ and Cd2+ from wastewater using recovered perlite was an important way to solve the problem of resource utilization of solid waste from agar production. Our previous study confirmed that recovered perlite from agar extraction residue had better pore size and specific surface area than commercial perlite. However, the adsorption efficiency and adsorption mechanism of recovered perlite were the main factors limiting its adsorption application. The adsorption process of Ni2+ and Cd2+ by recovered perlite in aqueous solution was described by the pseudo-second-order kinetic equation, and the relevant adsorption mechanism was mainly chemisorption. Compared with commercial perlite, the adsorption removal rate of Ni2+ and Cd2+ by enzymatic recovered perlite could reach 92.9% and 89.2%, respectively, and were improved by 12.63% and 13.03%. Langmuir isothermal adsorption model could better describe the isothermal adsorption process of recovered perlite on heavy metal Ni2+ and Cd2+, and the relevant adsorption mechanism was mainly monolayer adsorption. The X-ray photoelectron spectroscopy (XPS) results indicated that the decrease of Si-O Si2+ hydroxyl coordination bond and the increase of C-Si bond might make the binding effect of recovered perlite with heavy metals stronger. The competitive adsorption of Ni2+ and Cd2+ by recovered perlite was still dominated by chemisorption and monolayer adsorption. This study was expected to provide a theoretical basis and technical support for the removal of Ni2+ and Cd2+ from wastewater using recovered perlite from seaweed residue.

Key words: Agar extraction residue, Recovered perlite, Heavy metal ion, Adsorption property