Sol-gel synthesis of a humic acid-silica gel composite material as low-cost adsorbent for thorium and uranium removal

被引：11

作者：

Prasetyo, Erik ^{[1
,2
]}

Toyoda, Kazuhiro ^{[1
,3
]}

机构：

[1] Hokkaido Univ, Grad Sch Environm Sci, Kita Ku, N10W5, Sapporo, Hokkaido 0600810, Japan

[2] Indonesian Inst Sci, Res Unit Mineral Technol, Jl Ir Sutami Km 15, Tanjung Bintang 35361, Bandar Lampung, Indonesia

[3] Hokkaido Univ, Fac Environm Earth Sci, Kita Ku, N10W5, Sapporo, Hokkaido 0600810, Japan

来源：

JOURNAL OF RADIOANALYTICAL AND NUCLEAR CHEMISTRY | 2016年 / 310卷 / 01期

关键词：

Adsorption; Humic acid; Silica gel; Thorium; Uranium; Sol-gel; AQUEOUS-SOLUTIONS; FUNCTIONAL-GROUPS; ACTIVATED CARBON; ADSORPTION; SURFACE; PRECONCENTRATION; IMMOBILIZATION; SORPTION; IONS; VI;

D O I：

10.1007/s10967-016-4861-y

中图分类号：

O65 [分析化学];

学科分类号：

070302 ; 081704 ;

摘要：

A new humic acid-silica gel composite (HASi) to serve as an adsorbent was synthesized via a single-pot method, and its formation via the sol-gel process was confirmed by FTIR and SEM-EDS characterization. The adsorbent effectively removed Th and U at low pH (2.5-3), and the Langmuir model yielded a maximum sorption capacity of 32.3 and 33.2 mg/g for Th and U, respectively. The removal process was rapid (85 % removal within 5 min) and followed a pseudo-second-order model. The salinity of the solution had little effect on the removal efficiency, which continued throughout the adsorbent's repeated use up to nine times.

引用

页码：69 / 80

页数：12

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