MODELING CADMIUM ADSORPTION BY ACTIVATED CARBON USING THE LANGMUIR AND FREUNDLICH ISOTHERM EXPRESSIONS

被引：312

作者：

REED, BE ^{[1
]}

MATSUMOTO, MR ^{[1
]}

机构：

[1] SUNY Buffalo, DEPT CIVIL ENGN, BUFFALO, NY 14215 USA

来源：

SEPARATION SCIENCE AND TECHNOLOGY | 1993年 / 28卷 / 13-14期

关键词：

D O I：

10.1080/01496399308016742

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

Cadmium adsorption isotherms were conducted using two commercially available powdered activated carbons (PACs). Isotherms were conducted at several pH values and metal and carbon concentrations. Both PACs removed significant amounts of cadmium, and removal was a strong function of solution pH: increasing the solution pH increased cadmium adsorption. Adsorption data at a specific pH were successfully modeled using both the Langmuir and Freundlich isotherms. Adsorption and surface precipitation were hypothesized to be the operative removal mechanisms. Cadmium removal is strongly related to the carbon's pH(zpc), acid-base characteristics, and surface charge-pH relationship, Surface area, an important adsorption parameter for organic adsorbates, does not appear to influence metal removal strongly.

引用

页码：2179 / 2195

页数：17

共 15 条

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