期刊论文

Zhang, P.

中文

环境工程学报

1673-9108

2015

9

4

1675-1679

(农办财函[2014]28号):农业部 财政部重大专项子课题 (2015BAD05B02):国家科技支撑计划项目 (2006180):湖南省重点学科建设项目 :湖南省土水污染控制与资源化技术重点实验室资助项目

本校为第一且通讯机构

以玉米秸秆、稻壳在350~500℃制成的生物质炭作为吸附剂,研究其对溶液中Cd~(2+)的吸附特性。通过模拟实验,考察了初始pH、生物质炭用量、吸附时间和Cd~(2+)的起始浓度对吸附的影响。结果表明,2种生物质炭对Cd~(2+)的吸附反应适应pH范围较宽(4.0~7.0);玉米秸秆炭和稻壳炭对Cd~(2+)的吸附速度较快,分别在10和20 min时达到吸附平衡;玉米秸秆炭对溶液中Cd~(2+)的吸附遵循Langmuir等温线模型,而稻壳炭对Cd~(2+)的吸附遵循Freundlich等温线模型。在实验设定的条件下,玉米秸秆炭对溶液中Cd~(2+)的吸附能力强于稻壳炭。

Biochars were produced from corn straw, rice husk respectively, at 350~500℃. Through simulation experiments, adsorpions of Cd2+ in aqueous solution by two biochars were investigated, and effects of pH values, biochars doses, contact time and initial concentrations of Cd2+ on the adsorptions were investigated. The results indicated that the adsorption reactions for Cd2+ removal could be carried by wide adaption range of pH(from 4 to 7). The adsorption reactions were quick and the adsorption equilibrium times were 10 minutes and 20 minutes on co...