Removal of Hexavalent Chromium from Aqueous Solutions using Some Plants Bark Powder as Adsorbents
Journal Title: STAR Journal - Year 2014, Vol 3, Issue 4
Abstract
Heavy metals that have been associated only with chemists have now become a concern of environmentalist also. They impact the ecosystems when released into water bodies or soil by various human activities resulting in the environmental pollution. High concentration of Cr (VI) is harmful to animal and human health. The hexavalent chromium exists in aquatic media as water soluble complex anions and persist. These are concentrated in industrial waste water especially from the tannery industries and release of effluents from industries adversely affects the environment. The removal of heavy metals from aqueous solutions is carried out by different physical, chemical and biological methods. Now a days, use of plants waste products such as: barks, manures or lignocellulosic materials, for the removal of heavy metals from polluted water are becoming of more concern. In the present study, low-cost and easily available material such as plant barks for the removal of chromium VI from its aqueous solution was investigated. Bark powders of plants namely, Pongamia glabra, Tamarindus indicus, Tesphesia populnea, and Mangifera indica obtained from nearby saw mills, were used as adsorbent for the removal of Cr (VI) from aqueous solutions in excess of maximum permissible limits. Adsorption for chromium (VI) was found to be highly dose dependent compared to the other parameters observed with almost 100 % efficiency at pH 2, contact time of 2h at room temperature with 3 g l-1 bark dosage. The adsorption capacities of all the plant barks for chromium (VI) was found to be comparable to other commercial adsorbents currently employed for the removal of heavy metals from aqueous wastes. The results have demonstrated the immense potential of plants bark powder as an alternative adsorbent for removal of Cr(VI) ions from polluted water.
Authors and Affiliations
Kalandar A| School of Medicine, College of Health and Medical Sciences, Post Box No: 235, Haramaya University, Dire Dawa, Ethiopia, Hiranmai Yadav R| School of Natural Resources Management and Environmental Sciences, College of Agriculture and Environmental Sciences, Post Box No.337,Haramaya University, Dire Dawa, Ethiopia
Design and Analysis of Butterfly Valve Disc Using Aluminium (1100) and Al-CNT4% Composite Material
Aluminium (1100) is an extensively used material in the application of water line and drainage applications. If the aluminium (1100) surface contacts the water, an oxide layer will be formed and it prevents the corrosi...
Storage Period, Husking and Seed Treatment Effects on Germination of Rhodes Grass (Chloris gayana L.) Seeds
No Abstract
Anticaries Activity of Usnea pictoides G. Awasthi -A macrolichen from Western Ghats of Karnataka, India
The present study was conducted to determine anticaries activity of solvent extracts of a macrolichen Usnea pictoides G. Awasthi (Parmeliaceae) collected at Mullayanagiri, Western Ghats of Chikmagalur district, Karnata...
Analysis of Mechanical Properties of Hybrid Burmese Silk Orchid and Glass Fibers Composite Material
The mechanical properties of vinyl ester matrix composites reinforced with hybrid burmese silk orchid– glass fibres were evaluated. There are indications that the incorporation of both fibres into a single matrix whi...
Preparation, Characterization and In Vitro Drug Release Studies of 6-mercaptopurine Thin Film
Oral thin films of 6-mercaptopurine were fabricated from mucoadhesive polymer, chitosan and polyvinylpyrrolidone for the purpose of prolonging drug release and improving its bioavailability. All fabricated film formula...