Removal of lead by using Raschig rings manufactured with mixture of cement kiln dust, zeolite and bentonite

► The low cost adsorbents were manufactured by using cement kiln dust, zeolite and bentonite. ► The strength, reliability and lead sorption was optimized to fabricate reliable adsorbents. ► The removal of lead by manufactured ring without using filtration is the novelty of study. The obtained results can be useful in industrial practice