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This paper reports the growth mechanism of sol–gel derived nanocrystalline ZnO powder. The influence of pH value on the particle size and its properties are studied using X-ray diffraction, UV, Fourier transform infrared spectroscopy, photoluminescence (PL), and impedance spectroscopy. UV analysis reveals an increase in bandgap due to decrease in particle size. The strong UV emission along with some...
Bio-sorption of Pb2+ ion from wastewater with Chlorella was investigated in the batch mode. The influence of pH of the solution, biosorbents dose, concentration of ions and contact time on bio-sorption capacity of Pb2+ ions was studied. The studies revealed that Pb2+ ions uptake rate was rather slow, with 75% of the total amount occurring in the first 10min for Chlorella. The optimum pH for bio-sorption...
Put dead immobilized saccharomyces cerevisiae biomass into column of continuous upflowing reactor. Study the influence of temperature, quantity of saccharomyces cerevisiae in column and initial Cu2+ concentration on Cu2+ adsorption. Determine optimal operating parameters of initial pH values, flow rates and quantities of saccharomyces cerevisiae in column through orthogonal experiment. Analyse adsorption...
The influence of salicylate-ion concentration, process temperature and pH of solutions on the bismuth precipitation degree from perchloric and nitric acids solutions and on the composition of forming were studied. It was demonstrated that bismuth could be precipitated from perchloric and nitric acid solutions as monosalicylate as well as disalicylate with the composition of BiOC7H5O3 and Bi2O(C7H5...
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