CAJ | 학술논문

以花生壳生物质炭( PSB)为原料,采用KOH活化法制备了比表面积为461 m2·g-1的花生壳活性炭( K-PSB ),利用氮气吸附脱附等温线、SEM等对样品进行了表征,并将孔隙结构发达的花生壳活性炭用于重金属Cd2+的吸附,考察反应时间、溶液pH值、花生壳活性炭的投加量等对Cd2+吸附的影响.结果表明:随着吸附时间的推移,Cd2+的吸附量逐渐增加直至达到平衡,当Cd2+浓度为50 mg· L-1,PH值等于6,投加量为1 g· L-1时,花生壳活性炭对Cd2+的吸附效果最佳;该吸附是一个吸热反应,随着温度的增加,吸附量逐渐增大.
이화생각생물질탄( PSB)위원료,채용KOH활화법제비료비표면적위461 m2·g-1적화생각활성탄( K-PSB ),이용담기흡부탈부등온선、SEM등대양품진행료표정,병장공극결구발체적화생각활성탄용우중금속Cd2+적흡부,고찰반응시간、용액pH치、화생각활성탄적투가량등대Cd2+흡부적영향.결과표명:수착흡부시간적추이,Cd2+적흡부량축점증가직지체도평형,당Cd2+농도위50 mg· L-1,PH치등우6,투가량위1 g· L-1시,화생각활성탄대Cd2+적흡부효과최가;해흡부시일개흡열반응,수착온도적증가,흡부량축점증대.
The activated carbon ( K-PSB) was prepared from peanut shell biomass carbon ( PSB) as raw material whose specific surface area is 461 m2 · g-1 by using the KOH activation method.The samples were characterized by nitrogen adsorption desorp-tion isotherms and SEM.And the porous structure of peanut shell activated carbon was used for the adsorption of heavy metal Cd2+.The effects of reaction time,pH value of solution,and the dosage of Cd 2+on the adsorption of the activated carbon were investigated.The results show that,with the adsorption time,the adsorption capacity of Cd 2+gradually increased until it reached equilibrium.When the Cd2+concentration is 50 mg· L-1,the pH value is 6.When the dosage is 1 g· L-1,the adsorption effect of activated carbon on the adsorption of Cd 2+was the best.This adsorption is an endothermic reaction,with the increase of temperature,the adsorption capacity increased gradually.