Biosorption of dichlorodiphenyltrichloroethane and hexachlorobenzene in groundwater and its implications for facilitated transport

Article Abstract:

The potential of free-living bacteria to facilitate the transport of hydrophobic compounds in groundwater was evaluated. The sorption of dichlorodiphenyltrichloroethane (DDT) and hexachlorobenzene (HCB) to bacteria were found to be linear, reversible, fast and a passive process. Sorption of HCB was lower than sorption of DDT. A transport model was predicted based on the bacteria-water partition coefficient. There was, however, a disagreement when DDT transport through sand was compared with the transport model. It revealed that bacterial densities and biosorption could influence the facilitated transport of organic compounds.

Evaluation, Environmental aspects, Bioremediation, Organochlorine compounds, Organic chlorine compounds

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Screening of tropical wood-rotting mushrooms for copper biosorption

Article Abstract:

The fruiting bodies of nine nonedible fungal species are examined for copper (II) uptake on the basis of saturation uptake potential. At ph 4.0 all nine species exhibited higher QmaxS than that obtained from Filtrasorb-400. Different QmaxS are demonstrated by different species and this variation ranges from 0.048 to 0.383 mmol per g of sorbent. The highest QmaxS is displayed by the species Ganoderma lucidum.

Research, Fungi, Trees, Trees (Plants), Diseases and pests, Wood-decaying fungi

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Cadmium ion biosorption by the thermophilic bacteria Geobacillus stearothermophilus and G. thermocatenulatus

Article Abstract:

The extent of cadmium ion adsorption by both studied Geobacillus sp. strains described distinct one-site surface complexation models (SCMs) over a range of pH values and metal/bacteria concentration ratios. The findings show a different type of functional group might be involved in cadmium biosorption for both thermophilic strains investigated, compared to previous reports of mesophillic bacteria.

All Other Basic Inorganic Chemical Manufacturing, Industrial inorganic chemicals, not elsewhere classified, Cadmium Compounds, Analysis, Genetic aspects, Bacteria, Thermophilic, Adsorption, Metal ions, Chemical properties, Thermophiles

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