环境工程学报2017，Vol.11Issue(4)：2137-2144,8.DOI:10.12030/j.cjee.201510231
FeCl3改性柚子皮吸附去除水中的砷
Adsorption removal of arsenic in aqueous solution by FeCl3-modified pomelo peel
摘要
Abstract
A newly modified biomass adsorbent of powdered pomelo peel-FeCl3has been synthesized and shows great potential as a treatment for arsenic polluted water.The presynthesized powder mixture of the pomelo peel and FeCl3 at a mass ratio of 50∶1 was stirred in the water under the room temperature for a few minutes and then dried at 85 ℃ for 24 h.The adsorbent experiment was conducted under the following conditions:an arsenic concentration of 1.5 to 30 mg · L-1,a pH value of 2 to 9,an adsorbent dosage of 10 g · L-1,a temperature of 20 ℃,and a maximal balance time of 30 min.The result shows the highest adsorption efficiency of 96.19％ and the maximum unit adsorption capacity (q) of 1.86 mg · g-1,which could be explained by the isothermal equations of Freundlich.The discussed reaction mechanism may consist of the main chemical adsorption and some physical adsorptions in the water,such as complexation,flocculation,and precipitation.Due to our adsorbent's obvious advantages of an automatic-control of the pH value,an ease of operation,and a lack of secondary pollutants,the FeCl3-modified pomelo peel adsorbent is likely to be an ideal material in the treatment of moderately arsenic-polluted waste and in the resource utilization of biomass materials.关键词
柚子皮/FeCl3/砷/吸附/改性Key words
pomelo peel/FeCl3/arsenic/adsorption/modified分类
资源环境引用本文复制引用
王琼,付宏渊,何忠明,蒋朝晖,王平..FeCl3改性柚子皮吸附去除水中的砷[J].环境工程学报,2017,11(4):2137-2144,8.基金项目
国家科技支撑计划课题(2014BAC09B01-02) （2014BAC09B01-02）
国家自然科学基金资助项目(21307008) （21307008）
