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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...
This study focused on the characteristics of the removal of Cr(VI)(Cr6+) from wastewater with fly ashes (FAs), a by-product from coal-fired electric power plants. The influences of NaCl dose, pH, agitated time and fly ash (FA) dose (the temperature is 50°Cin the test) were investigated in batch experiments, and the removal of Cr6+ and sorption capacity with modified fly ashes (MFAs) were compared...
According to the characteristics of contaminated surface water, a stain of Micrococcus sp. (Micrococcus sp. N3-9P) that could remove CODCr efficiently was picked out from the slowly flowing oil-polluted riverbed sludge in Liaohe Oil Field, and then it was immobilized by chemical embedding technology. Through the conditional tests of immobilizing parameters, an improved co-immobilization technique...
Glycin functionalization of spherical cellulose was prepared and its application in the removal of chromium ions was investigated. The structural properties of the resulting composite material were characterized by Fourier transform infrared spectrum (FT-IR) and scanning electron microscope (SEM). The ability of the composite material for removing Cr3+ from aqueous solution was studied by batch experiments...
In resent years, various types of iron-based materials have been used as sorbents to remove heavy metals from wastewater. It is reported that the adsorption capacities of heavy metals on different kinds of iron oxides are quite high. However, researchers have not done much work on the Cr (VI) adsorption onto β-FeOOH. This study aims to investigate the removal of Cr (VI) with β-FeOOH, including the...
The thermodynamics characteristics of Cr (VI) adsorption, the effects of pH, concentration and contact time and the adsorption isotherm line at different temperature from aqueous solution with solphonated lignite under static conditions were studied. The results showed that the Langmuir isotherm equation well described experiment data in dilute solution because fitting correlation coefficients were...
PBS (flyash-based coagulant) made by fly ash in coal-fired thermal power plants and blast furnace iron sludge extracted with a dilute H2SO4 was used as coagulant in the treatment of tanning wastewater. The influence of pH value, coagulant dosage and temperature on coagulation effect was investigated. The results showed that this coagulant had satisfactory results to treat tanning wastewater under...
The paper produces Nano-TiO2 doped with Fe3+, Ce3+, Cu2+, Ce3+ and La3+ using sol-gel method, examines the effects of their preparation condition on catalyst performance, and then explores the influence of the adding amount of metal ions and different ions combinations on photocatalytic activity of modified Nano-TiO2. The result indicates the optimum condition for preparing doped Nano-TiO2 adopting...
The removal of heavy metal ions(HMI) contained in the electroplating wastewater by precipitation flotation was studied. Experimental results show that chromium, copper, nickel and other heavy metals can be removed efficiently, and all the water quality indexes were up to the first grade of wastewater discharge standard (GB21900-2008) when the dosage of Na2S (CNa2S:CMe=1.6) and pH7.5-8.5. The percentage...
Establishment concentrate distributed mathematical model of the whole tower under the condition of continuous foam separation with SDS as active agent , and the effect of the wastewater of Cr (III) to remove in different feeding high. The model has been tested by experiments. The Results indicated that the model is consistent with the data of experiments to a considerable degree.
In the dissertation, the treatment of chromium containing wastewater using sawdust which is a low-cost biosorbent. The influences of physical and chemical parameters such as pH value, reaction time and temperature and the initial concentration of metallic ion on the adsorption process were investigated by batch adsorption. When the pH value 6, reaction temperature 323 K, dosage of sawdust 6 g/L, the...
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