Analysis of Heavy Metal in Electrocoagulated Metal Hydroxide Sludge (EMHS) from the Textile Industry by Energy Dispersive X-Ray Fluorescence (EDXRF)

Metals

Tanveer Mehedi Adyel¹  Syed Hafizur Rahman³  Mala Khan² 

[1] School of Environmental Systems Engineering, The University of Western Australia, 35 Stirling Highway, Crawley, WA 6009, AustraliaInstrumentation and Calibration Service Laboratory (ICSL), Bangladesh Council of Scientific and Industrial Research (BCSIR), Dhaka 1205, Bangladesh;Department of Environmental Sciences, Jahangirnagar University, Savar, Dhaka 1342, Bangladesh;

关键词: electrocoagulation;    textile sludge;    X-ray optics;    landfill;    Bangladesh;   

DOI  :  10.3390/met2040478

来源: mdpi

【 摘 要 】

Environmental pollution due to discharges of heavy metal containing sludge from textile industries is a common nuisance in Bangladesh, where no treatment of sludge is carried out before final disposals. Energy Dispersive X-ray Fluorescence (EDXRF) was employed in the present study to analyze the heavy metal content of Electrocoagulated Metal Hydroxide Sludge (EMHS) collected from a composite textile industry. Thirteen heavy metals, viz., Mn, Ti, Cu, Zn, Ni, Sr, V, Cr, Zr, Hg, Cd, Nb and Ga, were detected. Mn, Ni, Cu, Zn and Cd exceeded the permissible limit to apply the EMHS in agricultural land. Cr, Ni, Cu and Zn were compared to the values of the European legislation to evaluate the environmental risk and to classify the wastes as inert wastes or as wastes that have to be control landfilled. EMHS was categorized as class I and needs to be deposited in controlled landfills.

【 授权许可】

CC BY   
© 2012 by the authors; licensee MDPI, Basel, Switzerland.