%0 Journal Article %T A comparative study of different materials (drinking water treatment sludge, nanoclay, and modified nanoclay) for simultaneous removal of hexavalent chromium and lead %A Heiari, Ava %A M. H. Sayadi %A Biglari Quchan Atigh, Zahra %J International journal of Environmental Science and Technology %@ 1735-1472 %D 2021