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This thesis is to study the water content of cadmium ions adsorbed and removed in the membrane reactor, respectively, and the class of biological sorbents calcined hydrotalcite membrane combined with, in addition to cadmium and fluoride examine its performance , providing effective for industrial applications data . Cadmium ions in a single system, the static test, the influences of the adsorbent at low concentrations of cadmium ions adsorbed on by changes in the main parameters ( initial concentration of 2-10 mg / L, adsorbent dosage of 0.05-0.5 g, pH 2-6, the adsorption time of 0-140 min), to obtain the adsorption capacity with the increase of the initial ion concentration increased, as the adsorbent amount decreased with the increase of Cd adsorption optimum pH is 5.0 , adsorption time is about 80 min. In the adsorption equilibrium, the maximum adsorption amount of Cd 8.755 mg / g. Isotherm model, cadmium closer Temkin adsorption isotherm model ; kinetics experiments is satisfied quasi- two kinetic models . Combination of alginate and CaCl2 -response relationship , the presence of cadmium ions in aqueous solution state, and Fourier transform infrared spectroscopy analysis explores the modified seaweed on cadmium ion adsorption mechanism . Complexation in EDTA-Cd system, examines the EDTA-Cd of different molar ratios and different pH , adsorbent for the adsorption behavior of cadmium ions . In the presence of EDTA , EDTA and cadmium ions form complexes , reducing the adsorbent for adsorption of cadmium ions . Complexation in EDTA-Cd system, adsorbent cadmium ion adsorption behavior conform chemical equilibrium model . In the membrane reactor experiments, mainly carried out in addition to cadmium fluoride continuous reaction kinetics of experimental studies and simulations . When 8L concentration of 1.0 mg / L cadmium solution, adding 3.0 g sorbent , to make the water meet emission standards 0.1 mg / L required 150 min or so ; hydrotalcite based on pre- adsorption of fluoride ions studied it with membrane in conjunction with, get the reaction of fluoride ion membrane adsorption kinetics closer to one .
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