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MODIFICATION OF MONTMORILLONITE BY TIOACETAMID AND USING ITS AS NOVEL ADSORBENT FOR THE VERY EFFECTIVE REMOVAL OF Cd(II) FROM AQUEOUS SOLUTION

modified,montmorillonite, ,cadmium,removal

Abstract- In this study, Montmorillonite (nanoclay) modified by tioacetamide. The morphology and structure of the modified adsorbent were characterized by powder the SEM, FT-IR and XRD. Then modified Montmorillonite used for removal of Cd(II) from aqueous samples. The effects of various parameters viz. adsorbent dose, agitation rate, contact time and initial solution pH were investigated for the removal of Cd(II).
Keyword- Cadmium (II), Modify, Montmorillonite, Removal.
Introduction- Cadmium has been described as one of the most dangerous trace elements in the environment. This element accumulates in living organisms and has a high toxic potential [1]. Cadmium has an extremely long biological half-life (>20 years) and it is listed by the US-EPA as one of the 126 priority contaminants and as a known carcinogen by the International Agency For Research on Cancer [2]. The permissible limit for Cd (II) as described by WHO is 3 μg/l in drinking water [3].
Result, discussion and conclusion- The SEM photographs clearly showed that after chemical treatment, a lot of pores were produced. Adsorbent dosage and pH are the most effective parameters on adsorption of Cd(II). From the experimental results, it was observed that for Cd(II) concentrations as much as 2-50 mg L-1, quantitative removal is obtained in a single adsorption. Langmuir and Freundlich isotherms were employed for the study of the adsorption of Cd(II) on modified adsorbent. Adsorption kinetics of Hg(II) onto the composite followed the pseudo-second-order kinetic model. This study showed that the tioacetamide-Montmorillonite is useful as a promising adsorbent to remove cadmium in different water and wastewater treatment. Simplicity and high adsorption capacity of adsorbent are the main advantages in this investigation.
References
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2. Jamali H.A, Mahvi A.H, Nazmara S., World Appl. Sci. J., 2009, 5, 16-20.
3. WHO (2008). Cadmium. In: Guidelines for drinking-water quality, 3rd edition incorporating 1st and 2nd addenda. Vol. 1. Recommendations. Geneva, World Health Organization, pp. 317–319