Evaluation of the Combined Cr(VI) Removal Capacity of Sawdust and Sawdust-Immobilized Acinetobacter haemolyticus Supplied with Brown Sugar

Abstract

The purpose of this study is to evaluate the combined Cr(VI) removal capacities of nonliving (untreated rubber wood sawdust, URWS) and living biomass (URWS-immobilized Acinetobacter haemolyticus) in a continuous laboratory scale downward-flow two column system. Synthetic solutions of Cr(VI) between 237 and 320 mg L −1 were mixed with 1 g L −1 brown sugar in a nonsterile condition. Final Cr(VI) of between 0 and 1.6 mg L −1 indicate a Cr(VI) removal capacity of 99.8-100%. The bacterial Cr(VI) reduction capacity increased with column length. This study shows the feasibility of using the two column system consisting of living (bacteria) and nonliving biomass (URWS) as a useful alternative treatment for Cr(VI) contamination in the aqueous system.

A Review on Abiotic Stress Caused by Industrial Effluents on Seed Quality

“…The increase in requirement of fresh water for industrial use also alarmed to rose from 30 BCM (Billion Cubic Meters) to 120 BCM by 2025 AD. (www.cseindia.org) [10] Negative impacts on water quality include increase in turbidity, colour, nutrient load and addition of toxic and persistent compounds [11].…”

Adsorption of hexavalent chromium on cationic cross-linked starches of different botanic origins

“…Tamarind wood activated carbon after activation with zinc chloride [8], activated carbon pre-treated by heating with sulphuric or nitric acid [9], also, were investigated as adsorbents of Cr(VI). Other kinds of adsorbents for Cr(VI) removal are various biomaterials, such as coir pith [10], succinic acid treated sugarcane bagasse [11], rubber wood sawdust alone or with immobilized Acinetobacter haemolyticus [12], seaweed Hydrilla verticillata [13], dead fungal biomass of marine Aspergillus niger [14] or thermophilic cyanobacterium Phormidium sp. [15].…”