作者:孙鹏，唐国明，杨祎宁，吴桐桐，吕亚楠，杨彬，刘丹青，刘迎春，张洪军
Authors:SUN Peng,TANG Guo-ming,YANG Yi-ning,WU Tong-tong,LU Ya-nan,YANG Bin,LIU Dan-qing,LIU Ying-chun,ZHANG Hongjun摘要:摘要:由于二氧化氯具有高效、广谱的灭菌能力且绿色环保，二氧化氯消毒剂以溶液形式被广泛应用。针对在水体消毒中，对于气态二氧化氯的应用相对较少的问题，以改性沸石为载体，亚氯酸钠为二氧化氯前体，硝酸铁、硝酸铜为活化剂，制备出一种质优价廉的缓释型二氧化氯除菌卡。充分利用气态二氧化氯渗透性和穿透性强的特点，依靠空气中水蒸气和二氧化碳与亚氯酸钠反应，实现二氧化氯的稳定释放。并进一步探究了沸石改性工艺、种类和粒径，亚氯酸钠和活化剂浓度等对二氧化氯释放速率的影响。确定了最佳粒径为1~2mm，最佳焙烧温度为500℃，浸泡沸石的最佳溶液是浓度为18%的现配亚氯酸钠溶液。硝酸铜和硝酸铁混合活化剂浓度为0.003mol/L。所制备的除菌卡有效期可达40天。
Abstract:Abstract:Chlorine dioxide disinfectant is widely used in solution form because of its high efficiency, broad-spectrum sterilization ability and environmental friendliness.To address the problem that the application of gaseous chlorine dioxide in water disinfection is relatively small, a high-quality and inexpensive slow-release chlorine dioxide bactericide card was prepared with modified zeolite as the carrier, sodium chlorite as the chlorine dioxide precursor, and cupric nitrate and ferric nitrate as the catalyst.Taking full advantage of the strong permeability and penetration of gaseous chlorine dioxide, it relies on the reaction of water vapor and carbon dioxide in the air with sodium chlorite to achieve stable release of chlorine dioxide.The effects of zeolite modification process, zeolite species, zeolite particle size, the concentration of sodium chlorite and catalyst on chlorine dioxide release rate were further explored.The optimum particle size is 1-2 mm, the optimum calcination temperature is 500℃, and the optimum solution for soaking zeolite is 18% sodium chlorite solution.Adding 0.003 mol/L mixed catalyst of cupric nitrate and ferric nitrate into sodium chlorite soaking solution can improve the release rate of chlorine dioxide.The prepared bactericide card is valid at least for 40 days.

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