Bentonitin Ağır Metallere Karşı Üstün Emme Kabiliyeti

Yakın tarihli bir literatur taraması çalışmasında, montmorillonit ve kaolin gibi killerin su arıtmada kullanımı ve ağır metal ile buna bağlı oluşan toksik ortamın uzaklaştırılmasındaki etkileri incelenmiştir. Çalışmada ;

Montmorillonit ve diğer modifiye formlarının kadmiyum, kromiyum, kurşun vs. gibi ağır metallere karşı emme kabiliyetinin çok daha iyi olduğu vurgulanmıştır.

Çalışmanın İngilizce özetine aşağıda yer verilmiştir

Adsorption of heavy metals on kaolinite and montmorillonite: a review.
Sen Gupta S, Bhattacharyya KG.
Department of Chemistry, B N College, Dhubri 783324, Assam, India. susmita2101@yahoo.co.in.
PMID: 22499238 [PUBMED ] Phys Chem Chem Phys. 2012 Apr 12.
The process of adsorption is considered to be one of the best water treatment technologies around the world. Different heavy metals, due to their toxic and hazardous nature, are possibly the most widespread groundwater contaminants imposing a serious threat to human health. In this review, an attempt has been made to discuss the use of two common clay materials, namely kaolinite and montmorillonite, along with their modified forms for heavy metal removal on the basis of published reports (2008 onwards). The modifications of clays have been attempted by the process of pillaring, intercalation, acid/base activation, functionalization, etc. The adsorption of toxic metals, viz., As, Cd, Cr, Co, Cu, Fe, Pb, Mn, Ni, Zn, etc., has been studied predominantly. Montmorillonite and its modified forms have much higher metal adsorption capacity compared to that of kaolinite as well as modified-kaolinite. The modification often boosted the adsorption capacities of the clays, however, reverse trends are also reported in some cases.