Development of Chemically modified Adsorbents from Clay Minerals for selective removal of Water Pollutants

Abstract

The waste water containing various kinds of organic dyes and heavy metals are newlinedischarged from several industries and factories which is a matter of concerned feeling as newlinethese pollutants can cause somber effects on our environment. In this research work three newlinekinds of modified adsorbents have been used. The modified adsorbents are Silica gel, newlineAluminium isopropoxide and Bentonite clay. Silica gel, Aluminium isopropoxide and newlineBentonite Clay were modified with Methyltrioctylammonium Chloride under ultrasonication newlineand were used as adsorbents to remove various dyes and heavy metals from wastewater. This newlineresearch work showed the adsorption enactment of Methylene blue, Lead, Congo red and newlineMalachite green by Methyltrioctylammonium Chloride modified Silica gel. Adsorption newlineperformance of Methylene blue, Lead and Cadmium were assessed by newlineMethyltrioctylammonium Chloride modified Aluminium isopropoxide and adsorption newlineperformance of fluoride ions and Methylene blue by Methyltrioctylammonium Chloride newlinemodified Bentonite clay. This research work showed that adsorption capacity of these newlinedifferent adsorbents has been significantly improved by modification with newlineMethyltrioctylammonium Chloride as compared to unmodified adsorbents. The effects of newlinedose of adsorbent, temperature and pH on adsorption of dyes and heavy metals have been newlinestudied. Characterization of adsorbent was made by Fourier Transform Infrared spectroscopy, newlineX-Ray Diffraction and Scanning electron Microscope. Adsorption of these dyes and heavy newlinemetals on the Methyltrioctylammonium Chloride modified Silica gel, Aluminium newlineisopropoxide and Bentonite Clay has been correlated well with the Langmuir model. The newlineresults proved that Silica gel, Aluminium isopropoxide and Bentonite clay modified by newlineMethyltrioctylammonium Chloride were effective adsorbents for the adsorption of Methylene newlineblue dye, Congo red, Malachite green, Lead, Cadmium and Fluoride ions and these are newlineexcellent adsorbents because these are environmentally safe and economic in nature. newline