Effect of porosity and surface chemistry on the adsorption-desorption of uranium(VI) from aqueous solution and groundwater

被引：37
|
作者：
Yakout, S. M. [1 ,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：
JOURNAL OF RADIOANALYTICAL AND NUCLEAR CHEMISTRY | 2016年 / 308卷 / 02期
关键词：
Biochar; Rice straw; Characterization; Surface modification; Uranium adsorption; ACTIVATED CARBON; URANYL IONS; HUMIC-ACID; SELECTIVE EXTRACTION; WASTE-WATER; SORPTION; REMOVAL; U(VI); PH; BIOSORPTION;
D O I：
10.1007/s10967-015-4408-7
中图分类号：
O65 [分析化学];
学科分类号：
070302 ; 081704 ;
摘要：
Rice straw-based biochars modified with different chemical regents were used as an adsorbent for uranium(VI). Effect of pyrolysis temperature and nature of modifying agent's as well as surface chemistry, surface charge, and pore structure on U(VI) removal was investigated. Amount and nature of the surface groups has, in general, more influence than its porosity on U(VI) adsorption. The adsorption was maximum for the initial pH of 5.5. Rice straw derived biochars had comparable U(VI) adsorption as compared to other adsorbents. The U(VI) removal was 90 % from groundwater. NaHCO3 was found to be the most efficient desorbent eluent for U(VI).
引用
收藏
页码：555 / 565
页数：11
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