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The composite ACF-DSA electrode was made on the basis of both commercial DSA anode and ACF electrode so as to degrade organics more effectively and completely. The composite electrode was proved to be more powerful for tetracycline decolorization and mineralization than using the DSA and ACF alone. With the aid of 254 nm ultraviolet irradiation and hydrogen peroxide, the COD removal efficiency was...
The toxicity and degradation of alkyl polyamin ether collector were studied. The acute oral toxicity tests manifested that the half lethal dose (LD50) of alkyl polyamine ether collector in female rats and male rats were 2000mg/kg and 2710 mg/kg respectively, which revealed alkyl ether polyamine collector was low toxic grade. Biodegradation experiment showed that the BOD5/CODCr value of alkyl polyamine...
A unsymmetrical photochromic diarylethene, 1-[2-methyl-5-(2-fluorophenyl)-3-thienyl]-2-(2-cyano-1,5-dimethyl-4-pyrryl)perfluorocyclopentene (lo), was synthesized, and its optoelectronic properties were also investigated. The results showed that this compound exhibited reversible photochromism, changing from colorless to blue after irradiation with UV light both in solution and in PMMA amorphous film...
Chlorobenzene(CB), one of the persistent organic pollutants (POPs), is a refractory semivolation organic compound and non-biodegradable. Treatment of CB contaminated wastewater by traditional method is essentially impossible. In the study, the sono-photocatalytic degradation of CB was examined in aqueous suspension using the TiO2 as photo catalyst. Some factors affecting the degradation rate of CB...
The composite photo catalyst of Fe3+-TiO2-zeolite is prepared in a bench scale, which is immobilized into a zeolite matrix by means of sol-gel technique. The oilfield wastewater in Huabei oilfield was chosen as the model pollutant to evaluate photo catalytic activity under the ultraviolet light and sunlight irradiation respectively, the possible mechanism of photo catalytic oxidation was deduced....
The photocatalitic performance of the novel granule TiO2 photocatalyst G02 in an appropriately packed-bed reactor (PBR) was investigated to increase the biodegradability of dye wastewater (model compound cationic pink FG). The rate constants of the decoloration were found to be direct proportional to the UV light intensity. The FBR photocatalytic decoloration of the dye by G02 can be described by...
Abstract-Wastewater from cyanidation leaching of gold from ore, coal coking, and electroplating processes contains high concentration of thiocyanate, an anionic toxin of particular concern to aquatic environments. This study investigated potential use of electron beam radiolysis of thiocyanate in aqueous solution. Results showed that in 500 mg/L thiocyanate solution with pH of 7 and 12, as irradiation...
TiO2 catalyst was prepared by two kinds of different methods. The photocatalytic activity of TiO2 prepared by the hydrothermal method is 2.5 times higher than that by sol-gel in degradation dimethyl phthalate (DMP). The combined photocatalysis with UV irradiation and ozonation (TiO2/UV/O3) process considerably improved mineralization and degradation of dibutyl phthalate compared to combined photocatalysis...
The Zn2+-La3+Co-doped TiO2 photocatalysts prepared by doping lanthanum ion and zinc ion into TiO2 structure in a sol-gel process were shown to be efficient photocatalyst for the purification of Indoor air.The catalyst samples were then characterized by XRD and UV-vis analyses. The analytical results demonstrated that the lanthanum- zinc co-doping could inhibit the phase transformation of TiO2 and...
The treatment of landfill leachate by combined photooxidation and biological anaerobic-aerobic method was investigated in this study. The effect of treating the landfill leachate with several single photochemical processes was examined and a comparison was made on the effect of treating the leachate with two integrated photochemical-biochemical processes in this experiment. Among such several processes...
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