Adsorption Studies of Heavy Metals by Low-Cost Adsorbents

Journal of Applied Sciences and Environmental Management

EZUMA, IBE¹  OKOLI, JU¹ 

关键词: Adsorption;    isotherm;    kinetics;    heavy metals;   

DOI  :  

学科分类：环境科学（综合）

来源: University of Port Harcourt * Department of Pure and Industrial Chemistry

【 摘 要 】

In this study, removal of toxic metals Cr(VI) from artificially contaminatedwater has been investigated with the aim of detoxifying industrial effluents before their safedisposal onto land or into the river. Two low-cost natural adsorbents, Palm Kernel fiber andCoconut husks, were used to remove Cr(VI) ion from synthesized waste water. The effects of,initial concentration, contact time, on adsorption efficiency were investigated. Adsorptionisotherm and kinetics were also studied. Generally, the result showed an increase in removalefficiency with increase in contact time and decrease of initial concentration. Kinetic studyrevealed that pseudo-second order model is suitable to explain all our experimental data. Theadsorption equilibrium data correlate well with Freundlich model, with regression coefficient,R2. The results showed that efficiencies of ACNH and APKF for Cr(vi) ion removal were91.14%, and 84.89% respectively. High adsorption capacity of the tested adsorbents makes itpreferable and very cheap and environmental-friendly alternative adsorption material.

【 授权许可】

Unknown