Abstract
This paper presents the performance of the low cost adsorbent coconut fiber in removing the heavy metals such as Zn(II), Cu(II) and Cr(VI) from textile dye effluent. Biosorption studies were carried out for various parameters such as adsorbent dosage, pH and contact time. The maximum removal of heavy metal ions from the textile dye effluent using activated coconut fiber was evaluated successfully through the percentage of seed germination of Vigna mungo L. with the treated adsorbents. Keywords: Biosorption, Zn(II), Cu(II), Cr(VI), activated coconut fiber, textile dye effluent, seed germination, Vigna mungo L
Highlights
Dyes are widely used in industries such as textile, rubber, paper, plastics and cosmetics to color the products
The objective of this study is to investigate the feasibility of using activated coconut fiber as natural biosorbent for the removal of heavy metals like Zn(II), Cu(II) and Cr(VI) from textile dye effluent
After cooling the raw material to room temperature, activated coconut fiber was prepared by thermal pyrolysis of coconut fiber at 823 K for 2 h (Ash et al, 2006)
Summary
Dyes are widely used in industries such as textile, rubber, paper, plastics and cosmetics to color the products. The discharge of heavy metals such as lead, chromium, mercury, uranium, selenium, zinc, arsenic, cadmium, copper, nickel, etc., into aquatic ecosystems constitute a severe health hazard to aquatic biotic systems, mainly due to their non-degradability and toxicity. Due to their mobility in natural water ecosystems, heavy metals in surface and groundwater supplies have been prioritized as major inorganic contaminants in the environment (Ahalya et al, 2006). Reverse osmosis, ion exchange, chemical precipitation, electrodialysis and lime coagulation These techniques are expensive and inefficient in complete removal, high reagent and energy requirements and generation of toxic sludge (Ahalya et al, 2005)
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