标题: Adsorption of natural composite sandwich-like nanofibrous mats for heavy metals in aquatic environment
作者: Wu, Y (Wu, Yang); Qiu, XD (Qiu, Xiaodan); Cao, SY (Cao, Shiyi); Chen, JJ (Chen, Jiajia); Shi, XW (Shi, Xiaowen); Du, YM (Du, Yumin); Deng, HB (Deng, Hongbing)
来源出版物: JOURNAL OF COLLOID AND INTERFACE SCIENCE 卷: 539 页: 533-544 DOI: 10.1016/j.jcis.2018.12.099 出版年: MAR 15 2019
摘要: Natural polymer cellulose acetate (CA) and natural rectorite (REC) were employed to fabricate nanofibrous mats and then immobilized with biosorbent saccharomyces cerevisiae (SCV) to construct a sandwich-like structure. The hydroxyl and carbonyl groups in the CA endowed the nanofibrous mats with a strong affinity for removing heavy metals, allowing them to act as an adsorbent for heavy metals. The REC, which was blended with CA to fabricate the CA/REC nanofibrous mats, increased the specific surface area of the nanofibers and provided ideal scaffolds for the attachment of SCV, resulting in more contact reactions between the nanofibrous mats and heavy metal ions. The adsorption equilibrium was reached within 30 min at the optimum pH of 7, and the saturated adsorption capacities of Zn (II) and Cd (II) were 104.31 and 99.33 mg/g, respectively. The adsorption for Zn (II) and Cd (II) decreased to 47.44 and 62.11 mg/g in the co-system, but the total amount of adsorption (111.36 mg/g) was remarkably higher than that for the single system, indicating that the all-natural composite mats had great potential to simultaneously adsorb multiple heavy metals. After three cycles adsorption-desorption, the composite mats maintained a high adsorption efficiency. (C) 2019 Elsevier Inc. All rights reserved.
作者关键词: Cellulose acetate/rectorite; Saccharomyces cerevisiae; Sandwich-like nanofibrous mats; All-natural composite; Heavy metals adsorption
KeyWords Plus: AQUEOUS-SOLUTION; SACCHAROMYCES-CEREVISIAE; CELLULOSE-ACETATE; BIOSORPTION; WATER; CHITOSAN; REMOVAL; EQUILIBRIUM; SORPTION; IONS
地址: [Wu, Yang; Qiu, Xiaodan; Cao, Shiyi; Chen, Jiajia; Shi, Xiaowen; Du, Yumin; Deng, Hongbing] Wuhan Univ, Sch Resource & Environm Sci, Hubei Key Lab Biomass Resource Chem & Environm Bi, Hubei Int Sci & Technol Cooperat Base Sustainable, Wuhan 430079, Hubei, Peoples R China.
通讯作者地址: Deng, HB (通讯作者)，Wuhan Univ, Sch Resource & Environm Sci, Hubei Key Lab Biomass Resource Chem & Environm Bi, Hubei Int Sci & Technol Cooperat Base Sustainable, Wuhan 430079, Hubei, Peoples R China.
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