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Cerium is an abundant rare earth element, with several stable and radioactive isotopes. Due to its numerous industrial applications, cerium radioisotopes are common components of liquid radioactive wastes. We investigated the removal of 139Ce radionuclide from wastewater by adsorption using composite of polypyrrole with wood sawdust, as a model for other cerium radioisotopes. The composite material...
A kind of Fe - Al - La composite oxide microspheres coated with a delay water-soluble layer of CaO was prepared. It was used to treat wastewater containing high concentration of fluorine. When chemical precipitation, flocculation precipitation ended, the fluorine content in water was <;20 mg/L, the CaO layer of Fe - Al - La composite oxide microspheres is dissolved and Fe - Al - La oxide microspheres...
A new kind of foaming material for oil adsorption was prepared by melting blend and mold pressing, with Ethylene Propylene Diene Monomer (EPDM) as the matrix and waste dusty slag as the filler. The effects of foaming agent (AC) and waste dusty slag contents on the oil absorbency were studied. The results show that the oil absorbency reached the highest value with waste dusty slag loading 10% and AC...
In the present study we reported the feasibility of extra cellular biopolymer( PFC02) produced by Pseudomonas alcaligenes as an alternative biosorbent to remove Co(II) metallic ions from environmental and industrial wastewater. The effects such as pH, dosage of biosorbent, Co(II) initial concentration and sorbate-sorbent contact time and agitating speed on the adsorption capacities of PFC02 were studied...
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,...
The avain feather is natural polymer material resources. It includes large quantity of keratin, among of which proteins take up 83%. The feathers modified by methyl methacrylate at Ammonium Persulfate(APS)-Sodium Bisulfite(SBS) as initiator are applied to treat chrome tanning waste water. The factors such as dosage, pH of chrome tanning waste water, adsorption time were discussed. The adsorption conditions...
The present work deals with the study of uptake behaviour of Cd(II), Pb(II), Hg(II) and Zn(II) ions by chemically synthesized poly(p-Bromoanaline) PPBrAN using batch equilibration technique with both single and binary mixtures. The PPBrAN were chemically synthesized in different HCl concentrations. The effect of the various parameters such as synthesis method, physical oxidation state of the polymer,...
The copper heavy metal wastewater does lots of harm to people and it is difficult to deal. Using flocculant to treat copper wastewater has a lot of advantages. Under certain conditions proceeded modification of a kind of clay which has the unique characteristic of absorbability. Then the modification clay and the polymerization iron carbonyl ion can play polyreaction, to innovate a new type of macromolecule...
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