Biosorption of Cadmium from Aqueous Solutions Using A local Fungus Aspergillus cristatus (Glaucus Group)

Abstract

Cadmium (Cd) (II) resistant strain of a marine fungus, named

Effect of Glucose Concentration on Ni and V Removal from a Spent Catalyst by Bacillus spp. Strains Isolated from Mining Sites

“…The literature reports several studies on the interaction of heavy metals with bacterial surfaces, but just few works consider these interactions at a molecular level. Even more, the presence of a carbon source caused strain-dependent effects on Ni and V removal from the spent catalyst, as previously reported for metal uptake assays with Pseudomonas aeruginosa (Sar et al, 1998) and Aspergillus cristatus (Hassan & El-Kassas, 2012). These observed differences may be possibly related to: 1) cell wall properties, as the presence of specific anionic polymers (Öztürk, 2007), whose metal interaction capability may be altered by the presence or absence of glucose, or 2) distinctive metabolic glucose-dependent and independent, signaling pathways that may confer each strain with diverse resistance mechanisms and metal uptake patterns.…”

“…nose was used as the carbon source in the medium (Krátký, Biely & Bauer, 1975). Besides, Hassan & El-Kassas (2012) studied medium compositions for Cd uptake by marine Aspergillus cristatus and showed that the main factors having negative effects on metal uptake was glucose. Thus, the results show that adaptability and metal removal capabilities differ between the strains MNSHI-9K-1, MV-9K-2, and MV-AH-1, and that each strain possesses specific abilities that may have been differentially developed due to previous adaptations attained in-situ, as they were isolated from high metal content mining sites (Gómez-Ramírez et al, 2012).…”

“…Therefore, the basis for these differences as well as for variations in metal-accumulation abilities may be the result of cell surface characteristics (Edyvean, Williams, Wilson & Aderhold, 1997;Tsezos, 1997). The alteration of the metal uptake abilities of some microorganisms by the presence of a carbon source has been previously demonstrated (Hassan & El-Kassas, 2012). For example, it was observed that the addition of carbon sources resulted in a higher binding capacity of the metal ions Fe(III) and Cr(VI) by S. cerevisiae (Goyal, Jain & Benerjee, 2001).…”

Analysis of Cr(III) ions adsorption on the surface of algae: implications for the removal of heavy metal ions from water

“…Sorption of metals by algae generally depends on ionic charge of the metal ion, algal species and chemical composition of the metal ions in solution. They have different bioactive substances such as polyphenols, polysaccharides, lipids, proteins, vitamins, and carotenoids which have amine and several negative charge active groups, for example, carboxyl, phosphate and hydroxyl that create strong links between them and hazardous metals [14,15]. The experimental results were described using Freundlich and Langmuir adsorption models [16].…”

Biosorption of Heavy Metals from Aqueous Solutions:Insight and Review

“…With increase in environmental consciousness and strict government policies, it is imperative to search for new eco-friendly techniques to clean up contaminated water using low cost biosorbents. The rush to discover new biosorbents for removal of heavy metals has led scientists to investigate many adsorbents of biological origin like soil [15], tamarind fruit shell [16], olive stones [17], chitosan [18], hard wood bark [19], bacteria [20], algae [21], fungi [22], yeast [23], keratin [2], seaweed [24] etc Biomasses used for biosorption may be living or dead. Dead biomass or sorbents derived from them are much easier to use due to their less complex nature.…”