改性竹活性炭去除汞离子  

Removal of mercury ion with modified bamboo activated carbon

作　　者：谢新苹[1] 蒋剑春[1,2] 孙康[1,2] 卢辛成[1] 王金表[1] 

机构地区：[1]中国林业科学研究院林产化学工业研究所,南京210042 [2]中国林业科学研究院林业新技术研究所,北京100091

出　　处：《环境工程学报》2014年第4期1285-1289,共5页Chinese Journal of Environmental Engineering

基　　金：中央级公益性科研院所基本科研业务费专项资金(CAF-INT2013C02);"十二五"国家科技支撑计划项目(2012BAD30B03);江苏省自然科学基金资助项目(BK2012514)

摘　　要：采用溴化钾、碘化钾和硫磺对竹活性炭掺杂改性,利用电感耦合等离子体发射光谱仪测定滤液中汞离子浓度,用除汞效率和吸附容量评价活性炭对溶液中汞离子的吸附性能,探讨其吸附机理。结果表明,掺杂改性明显提高了竹活性炭的除汞性能。原竹活性炭的除汞效率为78.6%,吸附容量为2.210 mg/g;经碘化钾、溴化钾和硫磺掺杂改性后的竹活性炭除汞效率分别为94.3%、93.8%和88.8%,吸附容量分别为2.830、2.813和2.663 mg/g;经溴化钾(碘化钾)和硫磺联合改性的竹活性炭对水溶液中汞离子的吸附性能性能又有提高,其中以先载硫后载溴化钾的方法除汞效果最好,除汞效率达96.6%,吸附容量为2.898 mg/g。Bamboo activated carbons were modified with KBr, KI and S. The concentration of mercury ion in the solution was determined by inductively coupled plasma emission spectrometer. Adsorption properties of activa- ted carbons were evaluated by removal efficiency and adsorption capacity. Adsorption mechanism was discussed. Results showed that adsorption properties of bamboo activated carbon were largely improved after modification. Compared with raw bamboo activated carbon,the removal efficiency respectively rises to 94.3% ,93.8% and 88.8 % after modification with KBr, KI and S from 78.6%. Meanwhile, the adsorption capacity of the three adsor- bents increases to 2. 830,2. 813 and 2. 663 mg/g from 2. 210 mg/g. The adsorption properties of bamboo activa- ted carbons modified with KBr （KI） and S have a further increase. And the load method of first S next KBr has the best results,whose removal efficiency and adsorption capacity are 96.6% and 2. 898 mg/g.

关 键 词：竹活性炭 改性 汞离子 去除 

分 类 号：X703[环境科学与工程—环境工程] TQ424.1[化学工程]