Abstract
In availability of marine products India is one of the top most countries in the world. Approximately 40–50% of the total production consists of waste in the form of shell. Marine product shell is rich in chitin, chitosan, and cellulose. The important characteristic of these constituents is capability to adsorb heavy metals. Heavy metal pollution is one of the most serious environmental (effluent) problems. The objective of this study is to understand removal of heavy metal using chitosan immobilized on silica using electroanalytical technique. Adsorption conditions such as pH, amount of adsorbent, contact time, effect of eluent type, flow rate of sample solution, etc. are optimized using differential pulse voltammetric measurements. The best recovery results were observed at pH – 5 and 6, 200 mg adsorbent and 120 min contact time, 1.0 M HCl eluent, 0.2 ml/min flow rate. The devised procedure applied for determination of Zn (II), Cu (II), Cd(II), Pb(II), Fe(II), and Mn(II) in industrial effluent was reproducible with a relative standard deviation of 0.8%. This study highlighted that chitosan immobilized on silica from waste material is a promising adsorbent in removing heavy metals from wastewater and effectively estimated by differential pulse voltammetry.
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