Utilization of Chemically Activated Coconut Shells for Removal of Chromium （VI） from Aqueous Solution  

作　　者：K. Qureshil I. Bhatti R.F. Ashraf 

机构地区：[1]Chemical Department, Mehran University of Engineering and Technology, Jamshoro 76062, Pakistan [2]Textile Engineering Department, Mehran University of Engineering and Technology, Jamshoro 76062, Pakistan

出　　处：《Journal of Environmental Science and Engineering》2010年第12期1-5,共5页环境科学与工程（英文版）

摘　　要：The purpose of this study is to develop low cost adsorbing materials to remove the heavy metals from waste waters. The outer covering of coconut, coconut shell, is the most abundant in the countries of its plantation and enormous use. Utilization of agricultural waste （coconut shell） in the production of activated carbon potentially leads to produce a highly effective adsorbent generated from low cost raw materials that are available in huge quantity as renewable resources. At present coconut shell is not in use as valuable entity due to which disposal and ultimate environmental problems are faced. In this study coconut shells were impregnated with phosphoric acid and chemically activated at 450 C. The potential to remove chromium （VI） from aqueous solution by using activated coconut shells was investigated by batch experiment. The various sorption parameters i.e pH, sorbent dose, sorbate concentration, agitation time and agitation speed were optimized. The sorption of Cr （VI） onto activated carbon, developed from coconut shell, at pH 2 was achieved 81.25%. The best optimum conditions were obtained when 0.75 gm of sorbent was agitated at 150 rpm with 60 mg/L of sorbate for 40 min. Activated coconut shells has potential to be a good resource material for effective removal of chromium （VI） of low concentration from wastewater.

关 键 词：Adsorption SORPTION SORBATE SORBENT activated carbon activation 

分 类 号：X783.03[环境科学与工程—环境工程] O614.611[理学—无机化学]