期刊论文

Adsorption removal of arsenic in aqueous solution by FeCl_3-modified pomelo peel

Wang, P.

中文

环境工程学报

1673-9108

2017

11

4

2137-2144

10.12030/j.cjee.201510231

国家科技支撑计划课题(2014BAC09B01-02)； 国家自然科学基金资助项目(21307008)；

本校为其他机构

以生物质废弃物柚子皮为主要原料,通过在柚子皮粉中加入FeCl_3进行改性,将该改性产物用于吸附去除水中的砷。该改性柚子皮的制备条件为柚子皮粉:FeCl_3质量比为50:1,常温下加水混合均匀,在(85±2)℃条件下烘24 h后粉碎。当水中砷离子浓度为1.5~30 mg·L~(-1),pH值为2~9,吸附剂投加量为10 g·L~(-1),吸附反应温度为20 ℃的条件下,吸附反应30 min后达到平衡,去除率最高达到96.19%,单位吸附量q最大值为1.86 mg·g~(-1)。该吸附反应符合Freundlich等温方程,该去除机制可能以金属沉淀、静电吸附、絮凝作用和共沉淀作用为主。研究表明该改性吸附材料可自动调节废水pH值,操作简单,无二次污染,考虑用作...

A newly modified biomass adsorbent of powdered pomelo peel-FeCl 3 has been synthesized and shows great potential as a treatment for arsenic polluted water. The presynthesized powder mixture of the pomelo peel and FeCl 3 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℃, an...