CAJ | 학술논문

用十二烷基磺酸钠对天然硅藻土进行改性，改性后硅藻土的吸附效果明显优于天然硅藻土，吸附量由4．973mg／g增加到17．045mg／g。通过静态吸附实验探讨了改性硅藻土对废水中Cd2＋的吸附主要影响因素和动力学。在本实验条件下，吸附量随温度与Cd2＋浓度的增加而增加，但随改性硅藻土用量的增加而减少。在pH值为3～6时，吸附量随pH值的增加而增加。吸附动力学符合Imgergren准二级方程。
용십이완기광산납대천연규조토진행개성，개성후규조토적흡부효과명현우우천연규조토，흡부량유4．973mg／g증가도17．045mg／g。통과정태흡부실험탐토료개성규조토대폐수중Cd2＋적흡부주요영향인소화동역학。재본실험조건하，흡부량수온도여Cd2＋농도적증가이증가，단수개성규조토용량적증가이감소。재pH치위3～6시，흡부량수pH치적증가이증가。흡부동역학부합Imgergren준이급방정。
Natural diatomite was modified by twelve sodium dodecyl sulfate and the adsorption effects of modified diatomite were better than natural diatomite. The adsorption quantity from 4.973mg/g increased to 17. 045mg/g. The mainly affecting factors and the kinetics hade been investigated under through batch experinents of adsorbing Cd2＋ in wastewater by modified diatomite. Under the experiment conditions, the adsorption capacity was increased with the increasing temperature and the Cd2 ＋ initial concentration. But the adsorption capacity was decreased with the increasing amounts of modified diatomite. When pH was between 3 and 6, the adsorption capacity was increasd with increasing pH. The adsorption kinetics fitted well to the Lagergren psedo -second order equation.