open access

https://hdl.handle.net/2115/68651

Investigation of Chromium Removal Efficacy from Tannery Effluent by Synthesized Chitosan from Crab Shell

英語

2017-04

Arabian Journal for Science and Engineering

42(4)

1569-1577

The efficiency of chromium removal from tannery effluents using prepared crab shell chitosan was studied. Adsorption of Cr by chitosan was investigated at various contact times, pH values, adsorbent dosages, and temperatures. The amount of Cr adsorbed under different conditions was evaluated using atomic adsorption spectroscopy (AAS). Subsequently, the changes in the physicochemical parameters were also examined. It was found that the total dissolved solids (TDS), electrical conductivity (EC), and turbidity of the tannery effluent decreased significantly after treatment with crab shell chitosan. No significant changes were found after different soaking times; in most cases, the best adsorption was achieved within the first hour of treatment. On the other hand, the total organic carbon (TOC) and pH increased significantly after treatment with chitosan, possibly owing to dissolution of organic compounds from the adsorbent materials. The concentration of Cr was significantly reduced after treatment with chitosan under different treatment conditions. However, the highest amount of Cr was adsorbed within the first hour of contact. After studying different treatment conditions, it was found that maximum Cr removal from the tannery effluent was achieved at pH 3 (60 °C) using an adsorbent dose of 5 g/100 mL.

学術雑誌論文

Accepted Manuscript

The final publication is available at link.springer.com

2193-567X

2191-4281