Synthesis and characterization of a novel Ca-alginate-biochar composite as efficient zinc (Zn2+) adsorbent: Thermodynamics, process design, mass transfer and isotherm modeling

被引：43

作者：

Biswas, Subrata ^{[1
,2
]}

Sen, Tushar Kanti ^{[2
]}

Yeneneh, Anteneh Mesfin ^{[2
]}

Meikap, Bhim Charan ^{[1
,2
]}

机构：

[1] Indian Inst Technol, Dept Chem Engn, Kharagpur, W Bengal, India

[2] Curtin Univ, Chem Engn, Perth, WA 6845, Australia

来源：

SEPARATION SCIENCE AND TECHNOLOGY | 2019年 / 54卷 / 07期

关键词：

Ca-alginate-biochar composite; adsorption mass transfer model; metal ions; isotherm; AQUEOUS-SOLUTION; ACTIVATED CARBON; METHYLENE-BLUE; HEAVY-METALS; NICKEL(II) IONS; WASTE-WATER; LOW-COST; ADSORPTION; REMOVAL; EQUILIBRIUM;

D O I：

10.1080/01496395.2018.1527353

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

In this present work, Ca-alginate-biochar adsorbent has been synthesized, characterized and tested its effectiveness in the removal of aqueous phase Zn2+ metal. The removal efficiency was studied under various physicochemical process parameters. External mass transfer model, intraparticle diffusion model and pseudo-first-order and pseudo-second-order models were used to fit the experimental Zn2+ adoption kinetic results and to identify the mechanism of adsorption. The desorption studies indicate the possibilities of ion-exchange and physical-chemical adsorption of Zn2+. The adsorption was best described by Langmuir isotherm model. Thermodynamic parameters suggested that the adsorption process becomes spontaneous, endothermic and irreversible in nature. [GRAPHICS] .

引用

页码：1106 / 1124

页数：19

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