| 水热炭对水土环境中重金属铅的固持 |
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| 引用本文： | 杨婷婷,孟莉蓉,吴继阳,李响玲,尹微琴,王圣森,王小治. 水热炭对水土环境中重金属铅的固持[J]. 环境工程, 2017, 35(7): 1-6. DOI: 10.13205/j.hjgc.201707001 |
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| 作者姓名： | 杨婷婷 孟莉蓉 吴继阳 李响玲 尹微琴 王圣森 王小治 |
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| 作者单位： | 1. 扬州大学环境科学与工程学院,江苏扬州,225127;2. 扬州大学环境科学与工程学院,江苏扬州225127;江苏省有机固体废弃物资源化协同创新中心,南京210095 |
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| 基金项目： | 江苏省社会发展项目，江苏省六大人才高峰项目，江苏省环境材料与环境工程重点实验室项目，江苏省研究生科研创新计划项目 |
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| 摘 要： | 以纯米糠为前体制备水热炭,通过扫描电子显微镜、傅里叶红外光谱仪和元素分析仪等手段表征其物理化学性质;研究时间、p H、Pb~(2+)初始浓度等因素对其吸附Pb~(2+)的影响,以及其对污染土壤中Pb存在形态的影响。结果表明,纯米糠水热炭表面呈现多孔和网状结构,且含有丰富的表面含氧官能团,对溶液中Pb~(2+)有很强的吸附作用,p H=5时吸附效果最好,吸附24 h基本达到平衡。当Pb~(2+)初始浓度为80 mg/L,水热炭投加量为0.75 g/L时,水热炭对Pb~(2+)的吸附量可达72.44 mg/g。将水热炭投加到Pb污染土壤中,能有效降低弱酸提取态Pb含量,提高残渣态Pb含量,使Pb向更加稳定的状态转化。
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| 关 键 词： | 纯米糠 水热炭 吸附 土壤污染 Pb |
IMMOBILIZATION OF Pb IN CONTAMINATED WATER AND SOIL BY HYDROTHERMAL CARBON |
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| YANG Ting-ting,MENG Li-rong,WU Ji-yang,LI Xiang-ling,YIN Wei-qin,WANG Sheng-sen,WANG Xiao-zhi. IMMOBILIZATION OF Pb IN CONTAMINATED WATER AND SOIL BY HYDROTHERMAL CARBON[J]. Environmental Engineering, 2017, 35(7): 1-6. DOI: 10.13205/j.hjgc.201707001 |
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| Authors: | YANG Ting-ting MENG Li-rong WU Ji-yang LI Xiang-ling YIN Wei-qin WANG Sheng-sen WANG Xiao-zhi |
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| Abstract: | Hydrothermal carbon using pure rice bran as a material was synthesized,characterized by SEM,FT-IR and Vario-EL to represent physical and chemical properties.The hydrothermal carbon was used as an adsorbent to remove Pb2+ from aqueous solution.The influence of pH values,contact time and initial Pb2+ concentration on Pb2+ removal was investigated.And hydrothermal carbon was added to Pb contaminated soil to observe heavy metals formation in soil.The result showed that hydrothermal carbon had porous structure and contained a large amount of oxygen-containing functional groups;it had high adsorption ability to remove Pb2+ from aqueous solution.The efficient removal occurred at pH 5 and reached equilibrium within 24 hours.When using 0.75 g/L hydrothermal carbon to adsorb Pb2 + from aqueous solution that the initial concentration of Pb2 + was 80 mg/L,adsorption quantity could reach 72.44 mg/g.Adding hydrothermal carbon to Pb-contaminated soil,the content of weak acid extractable Pb reduced,while the residual fraction Pb significantly increased when compared with control group,this showed that Pb transformed to a more stable state. |
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| Keywords: | pure rice bran hydrothermal carbon adsorption soil contamination Pb |
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