Biosorption behavior of Sr2+ using straw-derived biochar: equilibrium and isotherm study

被引：3
作者：
Yakout, Sobhy M. [1 ,2 ]
Elsherif, Eman [2 ]
机构：
[1] King Saud Univ, Coll Sci, Dept Biochem, POB 2455, Riyadh 11451, Saudi Arabia
[2] Atom Energy Author, Hot Labs Ctr, Cairo 13759, Egypt
来源：
DESALINATION AND WATER TREATMENT | 2016年 / 57卷 / 16期
关键词：
Biochars; Sorption equilibrium; Sr2+; Kinetics; Rice straw; AQUEOUS-SOLUTIONS; ACTIVATED CARBON; P-XYLENE; ADSORPTION; REMOVAL; URANIUM(VI); STRONTIUM; SORPTION; SORBENT; BENZENE;
D O I：
10.1080/19443994.2015.1019362
中图分类号：
TQ [化学工业];
学科分类号：
0817 ;
摘要：
Rice straw-derived biochars carbonize at different temperature (550, 650, 750 degrees C) used for Sr2+ removal. Experimental parameters affecting the sorption process like pH, contact time, sorbent concentration, and temperature were investigated. Sorption profile showed an initial rapid uptake which decreased and became almost constant after one hour. Optimum Sr2+ sorption was achieved at pH 6. Sorption kinetics good correlated with both pseudo-secondorder and Elovich kinetic equations. Isotherm model of Dubinin-Radushkevich provides the best correlation of Sr2+ sorption. The present biochar shows better sorption performance (198 mg/g) of Sr2+ than many types of sorbents. Adsorption of Sr2+ on biochar was endothermic and increase upon solution temperature rises from 25 to 55 degrees C. Present investigation emphasized that the rice straw-based biochar exhibited a high potential for Sr2+ removal from aqueous solution.
引用
收藏
页码：7262 / 7269
页数：8
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