Application of zeolites in removal of hazardous metal ions from drilling mud wastewater
 
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Faculty of Environmental Engineering, Lublin University of Technology, Nadbystrzycka 40B, Lublin, Poland
CORRESPONDING AUTHOR
Justyna Kujawska   

Faculty of Environmental Engineering, Lublin University of Technology, Nadbystrzycka 40B, Lublin, Poland
Publication date: 2019-10-09
 
Physicochem. Probl. Miner. Process. 2019;55(6):1467–1474
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ABSTRACT
In this study, the adsorption behavior of natural and activated zeolites with respect to Cd2+, Cr3+, Pb2+and Zn2+, was studied in order to consider their ability to remove hazardous metals from drilling mud. The batch method was employed, using initial metal concentrations in solution in the range of 0.1 to 2.5 mg/dm3. It was determined that independently of the concentration, the adsorption ratios of zeolite towards metal cations match the Langmuir and Freundlich isotherms. The results of the research on the reduction of concentration of hazardous metals from drilling mud wastewater by means of natural and activated zeolites were presented in the further part of this work. Natural and activated zeolites were introduced in portions (from 0.2 to 10 g) to 100 cm3 of wastewater; then, the content of metal ions was determined using an inductively coupled plasma spectrometer. The experimental data showed that the application of activated zeolite enabled the removal rate of Cr3+, Pb2+, Zn2+and Cd2+ close to 93%, 45%, 56% and 84%, respectively. In the case of the natural zeolite, the degree of hazardous metals removal was lower by only a few percent, but still high enough to be interesting from the practical point of view. Satisfactory effects of hazardous metal ions removal from drilling muds were achieved using 2 to 5 g of zeolite. The obtained results proved that the natural zeolite constitutes an important material for efficient removal of hazardous metal ions from drilling mud wastewater.
eISSN:2084-4735
ISSN:1643-1049