Volume 18, Issue 6 (2018)                   MCEJ 2018, 18(6): 27-37 | Back to browse issues page

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Asrari E, bazrafcan M. Study of possibility using modified concrete with Kaolin absorbent for removeing heavy metal of Chromium (VI) from wastewater bent. MCEJ 2018; 18 (6) :27-37
URL: http://mcej.modares.ac.ir/article-16-21003-en.html
Study of possibility using modified concrete with Kaolin absorbent for removeing heavy metal of Chromium (VI) from wastewater bent
Elham Asrari * 1, Mohsen Bazrafcan2
1- Payame Noor University , e_asrari@pnu.ac.ir
2- Payame Noor University
Abstract:   (8350 Views)
Nowadays, heavy metals are one of the greatest environmental problems. This problem intensifies by development of great industries and increasing of pollutant and contaminant resources daily. Increasing of population and reduction of water resources detect importance of waste treatment and reuse of water resources. Studies on treatment of effluents containing heavy metals have showed that adsorption to be a highly effective technique for removing heavy metals from aqueous solutions. The aim of this research was to use of absorbent materials (kaolin clay) to remove chromium (VI) from the wastewater in discontinuous system According to the results, optimum conditions of chromium removal were, pH=5, primary concentration of pollutant: 1000(mg/l), fine grained weight of consumed kaolin in constructing concrete: 30%, equilibrium time: 360 minutes, absorbing capacity: 3.06 mg/g absorbent. Covering the concrete surface with kaolin absorbent can be an innovative and useful solution for increasing the rate of elimination of pollutant and contaminants, cost reduction and accelerating the absorption process. Absorbing capacity of chromium is 29.5 mg/g absorbent in this condition respectively. Real waste sample are used for confirming the application of concrete in ordinary conditions of wastewater basin in accordance of optimum conditions of kinetics wastewater. Elimination rates of heavy metal of chromium were 90.3% in optimum condition with real samples that has been got from industrial factory. Therefore, it could be concluded that modified concert presents a good potential for treatment of Cr in wastewater. However, further research should be applied for continuous removal of heavy metal in large-scale. According to the result , mixing Kaolin in the concrete could be used to increase the Durability and adsorption efficiency of Chromium .
 
Keywords: Chromium, kaolin, Modified concrete, Industrial wastewater
Full-Text [PDF 813 kb]   (3541 Downloads)    
Article Type: Original Research | Subject: Environment
Received: 2018/05/18 | Accepted: 2018/12/4 | Published: 2019/03/15
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