Removal of arsenic from aqueous solution using pottery granules coated with cyst of Azotobacter and portland cement: Characterization, kinetics and modeling

Selection of Hyper Exopolysaccharide Producing and Cyst Forming Azotobacter Isolates for Better Survival under Stress Conditions

“…During the course of this study, it was also shown that cyst formation can be induced by reduction of the sucrose content of the medium in which the organisms are grown and, as was already shown (Gauri et al, 2011), incorporation of 0.3% n-butanol as the carbon source into the solidified Burk's medium on which the organisms are grown also induces cyst formation. Thus, it would seem that, the Azotobacter cyst may represent a survival state formed in response to a variety of detrimental changes in the environment.…”

Biosorption of Metal Ions by Exopolysaccharide Produced by <i>Azotobacter chroococcum</i> XU1

“…It is interesting that most bacterial polysaccharides are characterised by the presence of uronic acids, pentoses, a polypeptide moiety or other nonsaccharide components, such as organic (e.g., acetyl, pyruvyl, succinyl group) or inorganic (e.g., sulphate or phosphate group) substituents [7,8]. A wide variety of bacteria genera, in particular Bacillus [5,9], Pseudomonas [10], Paenibacillus [2], Azotobacter [11], Shewanella [12] and Sinorhizobium [1] have been documented for EPS synthesis, metal adsorption properties.…”

“…EPS from Azotobacter revealed high adsorption rate and played a major role in immobilization of heavy metals [11]. EPS of Azotobacter directly bind and uptake heavy metals like Cd and Cr in the contaminated soils [13].…”

Efficient removal of arsenic from water using a granular adsorbent: Fe–Mn binary oxide impregnated chitosan bead

“…Adsorption is regarded as one of the most promising approaches to remove arsenic from water and wastewater, due to its simplicity, high efficiency and cost-effectiveness (Jang et al, 2006;Sharma and Sohn, 2009). Numerous sorbents (Mohan and Pittman, 2007;Gauri et al, 2011) have been tested for their arsenic removal abilities from aqueous solutions. Among them iron (hydr)oxides were the mostly investigated because of their strong affinity to arsenic species, low cost and environmental friendliness.…”