| 小麦秸秆和小麦秸秆生物质炭对低质量浓度Cd~(2+)的吸附特性研究 |
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| 引用本文： | 高青,齐学斌,赵志娟,李中阳,樊涛.小麦秸秆和小麦秸秆生物质炭对低质量浓度Cd~(2+)的吸附特性研究[J].灌溉排水学报,2017,36(2). |
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| 作者姓名： | 高青 齐学斌 赵志娟 李中阳 樊涛 |
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| 作者单位： | 1. 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;2. 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;3. 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 农业水资源高效安全利用重点开放实验室,河南 新乡 453002 |
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| 基金项目： | 公益性行业(农业)科研专项经费资助项目，国家863计划项目，中央级公益性科研院所基本科研业务费专项 |
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| 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Cd~(2+)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Cd~(2+)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Cd~(2+)去除率达90%以上,麦秆对Cd~(2+)去除率为70%左右;pH值对麦秆吸附Cd~(2+)影响显著,对生物质炭吸附Cd~(2+)影响极显著,pH值为3~6时生物质炭对Cd~(2+)的吸附效果较好。温度显著影响麦秆对Cd~(2+)的吸附,温度对生物质炭吸附Cd~(2+)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Cd~(2+)没有显著影响。
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| 关 键 词： | 小麦秸秆 生物质炭 吸附 Cd2+ |
Absorption ofCd2+at Low Concentration by Wheat Straw and Wheat Straw Derived-biochar |
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| 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 aque-ous solution were investigated.The results indicated that adsorption isotherm fit well with Langmiur equation,ad-sorption 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 quan-tity on adsorption of Cd2+by wheat straw and its derived-biochar. |
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| Keywords: | wheat straw absorption biochar Cd2+ |
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