Removal of arsenate and arsenite from aqueous solution by waste cast iron

作     者：Nag-Choul Choi Song-Bae Kim Soon-Oh Kim Jae-Won Lee Jun-Boum Park 

作者机构：Department of Rural Systems EngineeringSeoul National UniversitySeoul 151-921Republic of Korea Department of Earth and Environmental Sciences and Research Institute of Natural ScienceGyeongsang National UniversityJinju 660-701Republic of Korea JIU Corporation154-3 Samsung-dongGangnam-guSeoul 135-879Republic of Korea Department of Civil and Environmental EngineeringSeoul National UniversitySeoul 151-742Republic of Korea 

出 版 物：《Journal of Environmental Sciences》 (环境科学学报（英文版）)

年 卷 期：2012年第24卷第4期

页      面：589-595页

核心收录：

学科分类：083002[工学-环境工程] 0830[工学-环境科学与工程（可授工学、理学、农学学位）] 08[工学] 

基　　金：supported by the Brain Korea 21 of Safe Sustainable Infrastructure Research Group,Seoul National University 

主　　题：waste cast iron arsenic removal sorption batch experiment 

摘      要：The removal of As（III） and As（V） from aqueous solution was investigated using waste cast iron, which is a byproduct of the iron casting process in foundries. Two types of waste cast iron were used in the experiment： grind precipitate dust （GPD） and cast iron shot （CIS）. The X-ray diffraction analysis indicated the presence of Fe~ on GPD and CIS. Batch experiments were performed under different concentrations of As（III） and As（V） and at various initial pH levels. Results showed that waste cast iron was effective in the removal of arsenic. The adsorption isotherm study indicated that the Langmuir isotherm was better than the Freundlich isotherm at describing the experimental result. In the adsorption of both As（III） and As（V）, the adsorption capacity of GPD was greater than CIS, mainly due to the fact that GPD had higher surface area and weight percent of Fe than CIS. Results also indicated the removal of As（III） and As（V） by GPD and CIS was influenced by the initial solution pH, generally decreasing with increasing pH from 3.0 to 10.5. In addition, both GPD and CIS were more effective at the removal of As（III） than As（V） under given experimental conditions. This study demonstrates that waste cast iron has potential as a reactive material to treat wastewater and groundwater containing arsenic.