Edward W. Wilde

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Bioremoval, the use of biological systems for the removal of metal ions from polluted waters, has the potential to achieve greater performance at lower cost than conventional wastewater treatment technologies for metal removal. Bioremoval capabilities of microalgae have been extensively studied, and some commercial applications have been initiated. Although(More)
Eight algal species were tested for their ability to remove five toxic metalsduring 30-min exposures to single-metal (1 mg L-1) solutions at pH7. Efficacy of metal bioremoval varied according to algal species and metal. Al+3 was best removed by the thermophilic blue-green alga(cyanobacterium) Mastigocladus laminosus, Hg+2 and Zn+2 by the thermophilic and(More)
Foam embedded Burkholderia cepacia G4 removed up to 80 % and 60 % of a 3 mg/l solution of trichloroethylene (TCE) and a 2 mg/l solution of benzene, respectively. Removal of TCE and benzene decreased more than 50% when readily metabolizable carbon sources were present. TCE degradative activity was observed with G4 cells induced with phenol or benzene prior(More)
Post-thermal recovery of attached algae in six artificial streams subjected to three years of thermal pollution was studied for 20 months. Vaucheria, which had been reduced or eliminated by elevated temperatures in some of the streams, returned to pre-thermal abundance within one month. Schizothrix, which had been greatly augmented by heating, decreased to(More)
The pH of coal pile run off was elevated from <2 to >7 and dissolved heavy metal concentrations were brought within or below drinking water standards following batch treatments utilizing a mixed culture of bacteria. Treatment tanks containing the wastewater were inoculated with the bacterial culture and appropriate media for growth. Remediation (i.e.(More)
Immobilization of the trichloroethylene-degrading bacterium Burkholderia cepacia was evaluated using hydrophilic polyurethane foam. The influence of several foam formulation parameters upon cell retention was examined. Surfactant type was a major determinant of retention; a lecithin-based compound retained more cells than pluronic- or silicone-based(More)
In conjunction with a proposed algal cultivation scheme utilizing thermal effluent, twelve Fischerella strains were tested for tolerance to temperatures above and below their growth range. Exposure to 65 °C or 70 °C for 30 min caused bleaching and death of most or all cells. Effects of 60 °C exposure for periods of up to 2 h ranged from undetectable to(More)
Phytoextraction techniques utilizing a sterile strain of Vetiver grass (Vetiveria zizanoides) along with soil amendments were evaluated for removing lead and other elements such as Zn, Cu, and Fe from the soil of a 50-year old active firing range at the Savannah River Site (SRS). Lead-contaminated soil (300-4500 ppm/kg) was collected, dried, placed in pots,(More)
Algal community structure on natural substrates of thermally altered artificial streams was studied for one year. The streams were fed by a natural blackwater stream near Aiken, South Carolina. Temperature-related shifts in the abundance of major species were demonstrated. Red algae were absent from a stream heated 12·5°C above ambient, but remained(More)