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APA Citation
Ruziwa, D., Chaukura, N., Gwenzi, W., & Pumure, I. (n.d.). removal of Zn2+ and Pb2+ ions from aqueous solution using sulphonated waste polystyrene. Journal of environmental chemical engineering, 3(4), 2528–2537. http://access.bl.uk/ark:/81055/vdc_100029859333.0x000013