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题名: 氨基化生物质炭吸附水中汞离子性能研究
作者: 刘明灯 ; 王传义
会议名称: 2013重金属污染防治及污染场地调查、评估与修复新技术、新设备交流研讨会
会议日期: 2013
出版日期: 2013
会议地点: 长沙;上海
关键词: 氨基化生物质炭 ; 汞离子 ; 吸附 ; 实际废水
其他题名: Biomass derived amino-functionalized carbonaceous materials for Hg2+ removal
收录类别: CSCD
ISSN: 1671-3206
部门归属: 中国科学院新疆理化技术研究所 环境科学与技术研究室 新疆 乌鲁木齐 830011
摘要: 采用生物废弃物石榴皮,通过水热法制备氨基化生物质炭.通过傅里叶变换红外光谱仪(FT-IR)、扫描电镜(SEM)、BET及元素分析仪对所制备的生物质炭材料进行表征.以该氨基化生物质碳为吸附剂,研究水中汞离子在其上的吸附性能.考察了溶液pH值、时间及汞离子初始浓度对吸附的影响.实验结果表明,氨水作为溶剂可明显增加生物质炭的氮含量,吸附能力显著提高;吸附动力学数据符合准二级速率方程.pH值对吸附影响较大.吸附等温线可用Langmuir方程进行拟合;在pH=4.0时,氨基化生物质炭对汞离子的最大吸附容量为483.5mg/g,几乎为未进行氨基化改性碳材料(123.0mg/g)的4倍.该氨基化生物质炭用于PVC工业的实际废水处理,废水中汞离子的去除率达99.7%,处理后的废水可达排放标准.结果表明,该氨基化生物质炭在环境保护中显示出潜在的应用前景.
英文摘要: Preparation of biomass carbon from pomegranate peel amino system by hydrothermal method, used for the adsorption of Hg~(2+) in water.Removal efficiencies of the as-prepared carbonaceous material were tested as a function of initial pH and initial metal concentrations.The results show that the ammonia as the solvent can be significantly increased biomass char nitrogen content to significantly increase in the adsorption capacity.Adsorption kinetics can be elucidated by pseudo-second-order model.The maximum adsorption capacity for Hg~(2+) by amino-functionalized carbonaceous materials is 483.5 mg/g, about 4 times higher than that of unmodified carbonaceous materials.Moreover, as-prepared carbonaceous adsorbent can remove 99.7% of Hg~(2+) ions from practical wastewater generated in chlor-alkali industry, thus reaching the discharge permission standard.The results suggested that the amino-functionalized carbonaceous materials might be promising adsorbents for the removal of Hg~(2+) ions from aqueous solution.
语种: 中文
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内容类型: 会议论文
URI标识: http://ir.xjipc.cas.cn/handle/365002/3598
Appears in Collections:环境科学与技术研究室_会议论文

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