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This paper has researched on the adsorption of Cr(VI) in water using peanut shell. The dependence on pH and Cr(VI) concentration of the adsorption was studied. Batch experiments results showed that the adsorptive capacity of peanut shell was 13.39 mg/g of adsorbent. The Langmuir and Freundlich models were used to describe the adsorption equilibrium of Cr(VI) on peanut shell and the adsorption followed...
The best experimental factors were achieved through the single factor experiment and orthogonal experiment. When the initial concentration of formaldehyde was 120mg/L, reaction time was 30 minutes and the ratio between amount of sodium bisulfite and formaldehyde was 3:1, the removal rate of formaldehyde was approximately up to 100%, which fully satisfied the national emission standards (the concentration...
A simple, accurate, sensitive and selective flow injection catalytic kinetic spectrophotometric method for rapid determination of trace amounts of selenium is proposed in this paper. The proposed method is based on the accelerating effect of Se(IV) on the reaction of ethexlenediamine tetrecetic acid disodium salt (EDTA) and sodium nitrate with ammonium iron(II) sulfate hexahydrate in acidic media...
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