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The extraction of extracellular polymeric substances (EPS) from activated sludge and the absorption properties of chromium (VI) (Cr6+) on EPS were examined in this experiment. The effects of adsorption time, pH, mass of EPS, and initial Cr6+ concentration on Cr6+ removal efficiency were investigated. The results indicated that high speed centrifugation was efficient in the extraction of EPS and caused...
Denitrification is one of the main objectives of water pollution control. By using heterotrophic nitrification- aerobic denitrifying bacterial strains H1 to deal with domestic sewage, the removal rate of TN and NH4+-N can reach 66.04% and 62.11% respectively. In order to achieve solid-liquid separation and recycling of strains, H1 immobilized by polyvinyl alcohol- sodium alginate, Fe3O4 nanoparticles,...
In the present study we reported the feasibility of extracellular biopolymer(PF-9) produced by Pseudomonas fluorescence C-9 as an alternative biosorbent to remove Ni(II) metallic ions from environmental and industrial wastewater. The ability of PF-9 to remove the Ni(II) ions was investigated by using batch biosorption procedure. The effects such as pH, dosage of biosorbent, Ni(II) initial concentration...
Polyurethanes with pedant quaternary ammonium salts (QAS) have been shown potent antimicrobial properties against gram-positive bacteria but less sensitive to gram-negative ones. Besides, due to using a large amount of QAS chain extenders, Polyurethanes with pedant QAS have been proven to be high water adsorption and even water soluble. In order to solve the two problems mentioned above, Novel polyurethanes...
Cyanobacterial toxins which presented in drinking water sources posed a considerable threat to human health. In this study, the removal of cyanotoxins, including microcystin-RR, microcystin-LR and microcystin-YR, by ultrafiltration (UF) membrane made of polyvinylchloride was investigated. It was found that cyanotoxins were removed mainly by adsorption of PVC membrane, at least at initial stage of...
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