小麦秸秆和小麦秸秆生物质炭对低质量浓度Cd2+的吸附特性研究

高 青; 齐学斌; 赵志娟; 李中阳; 樊 涛

引用本文:	高青,齐学斌,赵志娟,等.小麦秸秆和小麦秸秆生物质炭对低质量浓度Cd2+的吸附特性研究[J].灌溉排水学报,2017,36(2):.
	GAO Qing,QI Xuebin,ZHAO Zhijuan,et al.小麦秸秆和小麦秸秆生物质炭对低质量浓度Cd2+的吸附特性研究[J].灌溉排水学报,2017,36(2):.

【打印本页】【下载PDF全文】【查看/发表评论】【EndNote】【RefMan】【BibTex】

←前一篇|后一篇→

过刊浏览高级检索

本文已被：浏览 1794次下载 2427次
分享到：微信更多字体:加大+\|默认\|缩小-
小麦秸秆和小麦秸秆生物质炭对低质量浓度Cd2+的吸附特性研究
高青，齐学斌，赵志娟，李中阳，樊涛
中国农业科学院农田灌溉研究所，河南新乡 453002；.中国农业科学院河南新乡农业水土环境野外科学观测试验站，河南新乡 453002；中国农业科学院农业水资源高效安全利用重点开放实验室，河南新乡 453002

摘要:

针对再生水灌溉镉污染问题，研发新型低成本高效重金属吸附材料。以农业废弃小麦秸秆和小麦秸秆生物质炭为研究对象，研究了麦秆和小麦秸秆生物质炭对低质量浓度Cd2+的吸附性能及影响因素。结果表明，麦秆和小麦秸秆生物质炭对Cd2+的吸附特性符合Langmuir方程，且吸附作用主要发生在吸附开始的10 min，试验条件下，生物质炭对Cd2+去除率达90%以上，麦秆对Cd2+去除率为70%左右；pH值对麦秆吸附Cd2+影响显著，对生物质炭吸附Cd2+影响极显著，pH值为3～6时生物质炭对Cd2+的吸附效果较好。温度显著影响麦秆对Cd2+的吸附，温度对生物质炭吸附Cd2+无显著影响，当吸附材料投加量大于0.5 g/L即固液比大于0.45 g/mg时，增大二者投加量对其吸附Cd2+没有显著影响。

关键词: 小麦秸秆；生物质炭；吸附； Cd2+

DOI：

分类号:

基金项目:

Absorption of Cd2+ at Low Concentration by Wheat Straw and Wheat Straw Derived-biochar

GAO Qing, QI Xuebin, ZHAO Zhijuan, LI Zhongyang, FAN Tao

Farmland Irrigation Research Institute of CAAS, Xinxiang 453002, China; Agriculture Water and Soil Environmental Field Science Station of Xinxiang City He’nan Province of CAAS, Xinxiang 453002, China; Key Laboratory of High-efficient and Safe Utilization of Agriculture Water Resource of CAAS, Xinxiang 453002, China

Abstract:

Wheat straw and wheat straw derived-biochar were taken as the research object. Adsorption property and its influential factors of Cd2+ at low concentration to the wheat straw and wheat straw derived-biochar in aqueous solution were investigated. The results indicated that adsorption isotherm fit well with Langmiur equation, adsorption equilibrium of Cd2+on wheat straw and wheat straw derived-biochar almost reached in 10 minutes. Under the experimental condition, the removal rate of Cd2+ on biochar was over 90%, which was 70% on wheat straw. There was significant effect of pH values on adsorption of Cd2+ by the biochar and wheat straw, temperature had effects on adsorption of Cd2+ by wheat straw, but there was no significant effect of temperature on adsorption of Cd2+ by the biochar. When 0.5 g/L wheat straw or biochar were used, there was no effect of different dosing quantity on adsorption of Cd2+ by wheat straw and its derived-biochar.

Key words: wheat straw; absorption; biochar; Cd2+