Teawaste as An Adsorbent for Heavy Metal Removal from Industrial Wastewaters | Science Publications

American Journal of Applied Sciences

Shahrokh Nazmara¹  Forugh Vaezi¹  Amir H.A. Mahvi¹  Dariush Naghipour¹ 

关键词: Teawaste;    Heavy Metals;    Adsorption;    Industrial Wastewaters;   

DOI  :  10.3844/ajassp.2005.372.375

学科分类：自然科学（综合）

来源: Science Publications

【 摘 要 】

Water used in industries creates a wastewater that has a potential hazard for ourenvironment because of introducing various contaminants such as heavy metals into soil and waterresources. In this study, removal of cadmium, lead and nickel from industrial wastewaters has beeninvestigated by using teawaste as a natural adsorbent. The research is a bench scale experimental typeand analyses have performed by using different amounts of adsorbent in solutions with 5 differentconcentrations of each metal and also in a mixed combination. Besides, the effect of various amountsof teawaste used in adsorption efficiency experiments has been investigated. Results indicate that theremoval efficiency is highest for lead and is minimum for cadmium. About 94 and 100% lead removalwere achieved by using 0.5 and 1.5g adsorbent for solutions having concentrations of 5 and 10 mg/LPb. Whereas, 1.5g teawaste can treat nickel solution of 5 mg/L concentration with an efficiency of notmore that 85.7%. For cadmium, the efficiency was only 77.2% in the same conditions. On the otherhand, for mixtures of metals and by applying 0.5 g teawaste, we considered a 3.5% decrease in leadremoval efficiency and a 13.2% decrease in nickel adsorption for a mixed solution of 5 mg/L.

【 授权许可】

Unknown