Adsorption of Cr (Ⅲ) by Sodium Alginate in Aqueous Solution

摘要：

The present study was undertaken to develop a cheap effective adsorbent and adsorption process involved in the adsorption of heavy mental-contaminated industrial wastewater using the developed adsorbent. Sodium alginate is the excellent adsorbent for the adsorption efficiency of the chromium (Ⅲ). Operational parameters such as pH, agitation time and adsorbent dosage, initial ion concentration and temperature were also studied. The optimal pH value for Cr3+ adsorption was 6.0. The maximum adsorption capacity of sodium alginate for Cr3+ was 3.12 mmol/g. Adsorption data fitted well with the Langmuir and Freundlich models. However, Langmuir isotherm displayed a better fitting model than Freundlich isotherm because of the higher correlation coefficient than the former exhibited. Desorption studies were carried out with HCl, HNO3, EDTA, Sodium carbonate and deionization water, and quantitative recovery of the metal was evident. The result shows sodium alginate is the excellent adsorbent for Cr3+.

关键词： sodium alginate heavy metals adsorption isotherms

作者: CHEN Wenbin WANG Liping YANG Yunqiong

作者单位: School of Environment Science and Spatial Informatics,China University of Mining and Technology,Xuzh School of Environment Science and Spatial Informatics,China University of Mining and Technology,Xuzh School of Chemistry Engineering,Huaihai Institute of Technology,liangyungang 222005,Jiangsu,China

会议类型: 国际会议

会议名称: 2009 International Symposium on Environmental Science and Technology(2009环境科学与技术国际会议)

会议地点: 上海

会议语种:英文

页码: 1413-1417

在线出版日期: 2009-06-02（万方平台首次上网日期，不代表论文的发表时间）