Aşağıda İngilizce özeti verilen diğer bir çalışmada, ağır metal içeren sızıntı suları ile yeraltı ve yeraltı kirlenmesini önlemek için dolgu alanlarında engel olarak yaygın bir şekilde kullanılan Monmorillonitin ağır metalleri tutma kabiliyeti incelenmiş, elde edilen sonuçlar neticesinde,

Montmorillonitin Manganez, Kurşun, Kadmiyum, Çinko, Bakır ve Krom gibi ağır metallerine karşı etkili bir bağlayıcı olduğu tespit edilmiştir.

Adsorption Of Heavy Metals On Na-montmorillonite. Effect Of Ph And Organic Substances
Abollino O, Aceto M, Malandrino M, Sarzanini C, Mentasti E.
Department of Analytical Chemistry, University of Torino, Via Giuria 5, 10125 Torino, Italy.
PMID: 12600390 [PUBMED – indexed for MEDLINE] Water Res. 2003 Apr;37(7):1619-27.

Abstract: Clays (especially montmorillonite and bentonite) are widely used as barriers in landfills to prevent contamination of subsoil and groundwater by leachates containing heavy metals. For this reason it is important to study the adsorption of metals by these clays. The sorption of seven metals (Cd, Cr, Cu, Mn, Ni, Pb and Zn) on Na-montmorillonite was studied as a function of pH and in the presence of ligands, forming complexes of different stabilities with the metals of interest. The continuous column method was used as it better simulates natural conditions. The total capacity of Na-montmorillonite towards these metals was determined. The pH variations influence to a higher extent the concentrations of Cu, Pb and Cd in the effluent. Moreover the results suggest that complex formation hinders the sorption of the metals on the clay, with an increasing influence in the order: Mn < or = Pb < or = Cd < or = Zn < Ni < Cu < Cr. The evaluation of the total capacity of Na-montmorillonite shows that this clay is a good sorbent towards all examined metals.