摘要
以粉末活性炭为主要原料,采用普通硅酸盐水泥熟料作胶凝剂,制备成型无机胶凝炭,重点研究其对水溶液中二价镉离子(Cd^(2+))的吸附特性。用BET对无机胶凝炭试样的孔隙结构进行表征,采用原子吸收分光光度计分析Cd^(2+)溶液浓度,并探讨Cd^(2+)初始浓度、pH值、作用时间等因素对试样吸附效果的影响。实验结果表明:试样对水中Cd^(2+)的吸附比单纯的粉末活性炭效果更好,在相同条件下,试样除镉率提高了13%,平衡吸附时间缩短了20min;试样还具备良好的循环使用特性,循环使用50次时,平均除镉率仍高达77.95%。
Activated carbon monoliths with inorganic cement binder, made by using powder activated carbon as main raw materials and ordinary portland cement clinker as cement binder, was employed for the removal of Cd^2+ from aqueous solution, and the adsorption properties was investigated. The pore structure of the activated carbon monoliths was characterized by BET specific surface area. The concentration of Cd^2 + was detected with all atomic absorption spectrophotometer, the effects of the initial concentration of Cd^2+ , pH, adsorption time on adsorption capability were discussed. The results showed that activated carbon monoliths had better removal effect of Cd^2+ compared with the pure powder activated carbon under the same conditions, the removal rate increased 13% and the adsorption equilibrium time shortened by 20 min. The results also demonstrated that activated carbon monoliths have excellent recycling adsorption performance of Cd^2+, the average removal rate was up to 77. 95% after the adsorption of 50 times.
出处
《硅酸盐通报》
CAS
CSCD
北大核心
2014年第6期1562-1566,共5页
Bulletin of the Chinese Ceramic Society
关键词
无机胶凝剂
成型活性炭
CD^2+
吸附
inorganic cement binder
activated carbon monoliths
Cd^2+
adsorption