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A series of zwitterionic hybrid polymers were prepared from the ring-opening polymerization of pyromellitic acid dianhydride (PMDA) and phenylaminomethyl trimethoxysilane (PAMTMS), and a subsequent sol–gel process. FTIR spectra confirmed the step products. TGA analysis showed that the thermal degradation temperature increased with an increase in PMDA content. As a typical example, sample B was used...
The research chose the alginate sodium and PVA as the materials to immobilize the atrazine degrading bacteria. Four methods were adopted: alginate sodium adsorption method, alginate sodium embedding method, PVA boric cross linking method and PVA freezing method. The degrading effects and the characteristics of the atrazine degrading bacteria in the two materials were studied respectively. The result...
A previous study using the batch method showed that sorption behavior of Perchloroethylene (PCE) in low organic content (0.080~0.090 % foc) aquifer sand was nonlinear and fitted the amended dual-mode model (DMM). This study aimed to investigate the transport of PCE in same media using finite duration and continuous input of solute in laboratory column tests. The experiments showed that the transport...
The effect of solution temperature and the determination of the kinetic parameters of methylene blue (MB) adsorption onto cereal chaff were performed to understand the adsorption mechanism. The pseudo-second order kinetic model was fitted to the experimental data and found it was good to predict the adsorption behavior using nonlinear regressive method, suggesting that the mechanism may be a chemisorption...
Immobilized microorganism technology is an effective method of removing water pollutant in source waters. The effect of biologically immobilized ceramic particles is better in removing the pollutant than simple filter or engineering bacteria liquid, due to the two factors including the adsorption and entrapment function of the filter materials in the biofilter and the biodegradation of the microorganisms...
The effect of loaded pellets in high voltage pulse discharge was investigated. There were some changes in the surface characteristics of different pellets with loaded catalysts. The specific surface area of the pellet loaded with ferric hydroxide increased and the pellet loaded with titanium dioxide decreased. Pore volume and pore size of loaded pellets were small. The adsorption of phenol on the...
The pollution of petroleum hydrocarbon in groundwater system has become a serious environmental problem. In this paper, we take Jinan refinery as an example to discuss the composition and migration mechanism of petroleum hydrocarbon contaminants. Based on filed survey and laboratory experiments, we researched the adsorption and desorption of petroleum hydrocarbons and the migration mechanism of them...
The methylene blue dye wastewater was treated by various amount of hydroxyl Fe modified bentonite, then, the dye was oxidized by the bentonite with the Fe catalysis. As a result the modified bentonite was regenerated and could be recycled in adsorption. Ultrasound and hydrogen peroxide have synergistic action on degradation of methylene blue for OH-Fe-bentonites' regeneration. The adsorption of dye...
With the rapid development of industry and agriculture, there are thousands of tons phosphate and nitrogen releasing into surface water. Phosphate becomes the main reason for eutrophication, resulting in deterioration of water quality. Ferric sludge from drinking waterworks was found to possess potential efficiency to remove phosphate ions from aqueous solutions. The maximum phosphate ions adsorption...
The aim of this paper is to model and optimize the conditions of obtaining the activated carbon prepared from the date cores, and the elimination of phenol by adsorption.Several activation chemical agents were tested for the preparation of the activated carbon. Best results is obtained with the phosphoric acid (54% of yield elimination). The operational parameters of activated carbon preparation have...
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