Method for removing iohexol in water by catalyzing ozone through oxidation-reduction medium reinforced ferric oxide
A technology of ferric oxide and medium strengthening, applied in chemical instruments and methods, oxidized water/sewage treatment, water pollutants, etc., can solve the problem of limited active hydroxyl radicals, low active radical yield, and pollutant degradation rate Low problems, to achieve the effect of improving the reaction rate constant, strengthening the reaction conditions, easy to meet, simple and fast operation
Active Publication Date: 2022-07-22
SHANGHAI UNIVERSITY OF ELECTRIC POWER
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Problems solved by technology
However, the active hydroxyl radicals generated by the direct ozone reaction are limited, that is, under the same conditions, the utilization rate of ozone is low, the yield of active free radicals is low, and the degradation rate of pollutants is also low.
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Embodiment 1
[0033] A 10 μM iohexol solution was prepared with ultrapure water; 10 μM 1-hydroxybenzotriazole solution was added to the iohexol solution, 10 mM phosphate buffer was added, and 1 M sodium hydroxide solution and 0.18 M sodium hydroxide solution were added. Dilute sulfuric acid solution to adjust the pH of the solution to 7, and stir to obtain a mixed solution;
[0034] Take 500ml of the mixed solution and put it in a double-layer glass tube reactor, then add 200mg / L of ferric oxide, turn on the ozone generator, adjust the ozone aeration concentration to 0.40mg / L, and maintain the aeration flow rate to 0.5L / min. The reaction time was controlled at 0, 2, 5, 10, 15, 30, and 60 min, and the degradation rate of iohexol by ozone was measured and calculated.
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The invention discloses a method for removing iohexol in water by using oxidation-reduction medium reinforced ferric oxide to catalyze ozone, which comprises the following steps: adding an oxidation-reduction medium and a catalyst ferric oxide into iohexol-containing to-be-treated water, and switching on an ozone generator to carry out ozone reaction until the reaction is carried out for 60 minutes, so that 100% of iohexol in the solution can be removed. Compared with the prior art, the method has the advantages that 1-hydroxybenzotriazole is adopted to strengthen ferric oxide to catalyze the ozone reaction, the content of iohexol in water can be quickly reduced, the utilization rate of ozone is high, the strengthening reaction effect is good, the reaction time is effectively shortened, and the method has engineering application value.
Description
technical field [0001] The invention belongs to the technical field of water treatment, and in particular relates to a method for removing iohexol in water by enhancing ferric oxide catalyzed ozone by a redox medium. Background technique [0002] Pharmaceuticals and personal care products (PPCPs) are widely detected in aqueous environments, and iodinated contrast media (ICMs) are an important component. ICMs are commonly used drugs for imaging of blood vessels and body cavities in interventional radiology. They are structurally stable and cannot be effectively removed by traditional water treatment processes. The global annual consumption of ICMs is about 3.5×106kg, of which 95% of the ICMs are excreted into the water body without being metabolized by the human body. Compared with other iodinated contrast agents, iohexol is a non-ionic contrast agent, which produces fewer adverse reactions than ionic contrast agents in actual use. In surface water, iohexol and iopamidol ar...
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IPC IPC(8): C02F1/78C02F101/34
CPCC02F1/78C02F1/725C02F2101/34C02F2305/023
Inventor 胡晨燕朱叶叶熊村王强兵
Owner SHANGHAI UNIVERSITY OF ELECTRIC POWER