| 不同原料生物炭对NH4+-N、PO43--P吸附性能的差异性及其成因分析 |
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| 引用本文： | 鲁小娟,田小平,王磊.不同原料生物炭对NH4+-N、PO43--P吸附性能的差异性及其成因分析[J].化工环保,2019,39(2):196-201. |
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| 作者姓名： | 鲁小娟 田小平 王磊 |
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| 作者单位： | 同济大学 环境科学与工程学院 污染控制与资源化研究国家重点实验室,上海,200092;同济大学 环境科学与工程学院 污染控制与资源化研究国家重点实验室,上海,200092;同济大学 环境科学与工程学院 污染控制与资源化研究国家重点实验室,上海,200092 |
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| 基金项目： | 国家重点研发计划项目（2017YFC0506004）; 浦东新区科技发展基金项目（PKJ2015-C11）; 浦东新区环保局科研课题 （2016012 ） |
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| 摘 要： | 以芦苇、小麦秸秆和竹子为原料,利用回流式炭化工艺制备3种生物炭。比较三者对NH_4~+-N、PO_4~(3-)-P的吸附性能,并对三者吸附性能差异的成因进行分析。实验结果表明:3种生物炭对PO_4~(3-)-P的吸附效果整体上优于NH_4~+-N,因为3种生物炭的阳离子交换容量CEC值和Zeta电位绝对值的水平均较低,不利于阳离子的吸附;竹炭Z-C对NH_4~+-N的吸附效果最佳,6 h去除率为3.59%,低的N含量、pH及Zeta电位绝对值对NH_4~+-N的吸附有利;芦苇炭LW-C中的O更多地与K、Mg等结合,形成能够与PO_4~(3-)反应生成磷酸盐沉淀或者晶体物质的金属氧化物,从而具有最好的PO_4~(3-)-P的吸附效果,6 h时去除率达16.91%。
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| 关 键 词： | 芦苇 小麦秸秆 竹子 生物炭 吸附 氨氮 磷酸盐 |
| 收稿时间： | 2018-09-25 |
Different absorption abilities of biochars from different raw materials to NH4+-N and PO43--P and their mechanisms |
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| LU Xiaojuan,TIAN Xiaoping,WANG Lei.Different absorption abilities of biochars from different raw materials to NH4+-N and PO43--P and their mechanisms[J].Environmental Protection of Chemical Industry,2019,39(2):196-201. |
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| Authors: | LU Xiaojuan TIAN Xiaoping WANG Lei |
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| Affiliation: | State Key Laboratory of Pollution Control and Resource Reuse,College of Environmental Science and Engineering,Tongji University,Shanghai 200092,China |
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| Abstract: | Using reed,wheat straw and bamboo as raw materials,three kinds of biochars were prepared by reflux carbonization process. The adsorption abilities of the 3 biochars to NH4+-N and PO43--P were compared,and the causes of the differences were analyzed. The results showed that：The adsorption abilities of the 3 biochars to PO43--P were better than that to NH4+-N on the whole,because of the low CEC and absolute values of Zeta potential of biochars,which were not conducive to the adsorption of cations;Bamboo charcoal Z-C had the best adsorption ability to NH4+-N with 3.59% of removal rate at 6 h,because its low TN content,pH and absolute value of Zeta potential were beneficial to NH4+-N adsorption;Reed charcoal LW-C had the best adsorption ability to PO43-P with 16.91% of removal rate at 6 h,because O in LW-C was most combined with K and Mg to form metal oxides which could react with PO43- to form phosphate precipitates or crystalline substances. |
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| Keywords: | reed wheat straw bamboo biochar adsorption ammonia-nitrogen phosphate |
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