Paper Details

Environmental contamination of water due to toxic heavy metal ions is becoming a serious threat to theenvironment and human health in particular due to their detrimental accumulation in living tissues, soil and waterbodies. Utilization of one waste material to control pollution caused by another is of high significance in the remediationof environmental problems. Clays are abundantly available natural material which has remarkable ability to adsorbheavy metals either in their natural form or after treating with some suitable chemicals. Many types of clays have beenemployed in removing heavy metals from industrial effluent. Researchers have studied the extent of uptake of differentmetals with the tested clays under different conditions such as pH, time of clay residence in solution with differentconcentration of metal and clay’s mass. Langmuir, Freundlich adsorption isotherms are commonly used for fittingexperimental data. Conventional technologies for the removal of heavy metals from wastewater are proving expensivedue to non-regenerable materials used and high costs. Adsorption is an emerging technique offering the use ofeconomical alternative materials as adsorbents for the removal of heavy metals from waste water. Roasted china clay isa waste of ceramic industry which is available free of cost in bulk. It has great potential to remove heavy metals ionsfrom wastewaters. This paper is a review for the use of various clays to exhibit different affinities towards differentmetals and hence its importance to be employed as an effective adsorbent. For commercial use of roasted china clay toremove metal ions from wastewater, emphasis should be given to the selection of metal to get high sorption capacity.Adequate understanding of sorption mechanism and development of low cost methods facilitate better prediction of metalsorption.

Shamim Ahmad, Anwer Ali, Ahmad Ashfaq, “ROASTED CHINA CLAY AS A POTENTIAL ADSORBENT FOR THE REMOVAL OF HEAVY METALS FROM WATER AND WASTE WATER”, International Journal of Advance Engineering and Research Development (IJAERD), Vol. 3, Issue 6, pp. 392-400, June 2016.