煤基活性炭的氧化改性及其对Cd^(2+)的吸附性能  

Adsorptive Properties and Oxidized Modification of Coal-Based Activated Carbons for Cd^(2+)

作　　者：王娅娅[1,2] 唐亚昆 高莎莎[1,2] 周蓉[3] 刘浪[1,2] 

机构地区：[1]新疆大学化学化工学院,新疆乌鲁木齐830046 [2]能源材料化学教育部重点实验室,新疆乌鲁木齐830046 [3]新疆大学学报编辑部,新疆乌鲁木齐830046

出　　处：《新疆大学学报（自然科学版）》2016年第2期134-140,共7页Journal of Xinjiang University(Natural Science Edition)

基　　金：新疆维吾尔自治区青年科技创新人才培养工程项目(2014721005);新疆维吾尔自治区重点实验室开放课题(2015KL010);NSFC-新疆联合基金(U1303391);乌鲁木齐市人才工程培养项目(P111310010)

摘　　要：本文以新疆库车煤为原料,采用KOH活化法,在低碱碳比(1:2)条件下制备了比表面积超过1000m^2/g的煤基活性炭.并用不同浓度的硝酸对活性炭进行表面氧化改性,比较了不同氧化程度的活性炭对Cd吸附性能的影响,同时考察了溶液初始浓度、溶液pH值和吸附时间对吸附性能的影响.研究结果表明:采用浓硝酸溶液处理的活性炭具有丰富的含氧官能团、吸附位点多、孔径大,为金属离子的吸附提供了有利条件.由于含氧官能团与金属离子的螯合作用,此氧化改性煤基活性炭对Cd^(2+)的吸附量最大可达到88 mg/g,是未改性前活性炭吸附量的16倍,此材料具有一定的工业应用前景.In this study,coal from Xinjiang kuche was used as raw materials.Coal-based activated carbons with the high surface area（1 000m^2/g） were prepared through the chemical activation of KOH in a low proportion of alkali/carbon（1：2）.Activated carbons were treated with different concentration of HNO3,leading to abundant oxidation functional groups and special pore structure,rich active sites on the surface of modified activated carbons.The effect of different parameters such as contact time,initial concentrations,solution pH value on the adsorption of Cd2＋ was studied in batch experiments.Owing to functional group interact with metal ions,maximum adsorption capacity of Cd2＋ on coal-based activated carbons modified with nitric acid reached to 88 mg/g,which was about 16 times than that of the original activated carbon.The results indicated that the modified activated carbon is a high efficient adsorbent for Cd^（2＋）,which has a promising prospect for industrial application.

关 键 词：吸附 氧化改性 煤基活性炭 重金属离子 

分 类 号：TB383[一般工业技术—材料科学与工程]