摘要
本文报告了电解法生产高铁酸钠碱溶液的研究结果,在电解过程中应用新型电解阳极、复会稳定剂、复合隔膜,比国外70年代到1984年的研究报告简化了工艺,电解产量大大提高,达到50～80g/L的饱和浓度。产品稳定性好,10℃储存,72h降解小于10%。在应用研究方面,用电解完成液制备高铁酸钾结晶,比化学法缩短了工艺流程,大大降低了成本。模拟自来水厂制水过程,用2mg/L高铁酸盐取代氯作水源水预消毒处理,结果显示:后氯化组(取消氯预处理)三氯甲烷生成量比氯预处理组平均减少56.4%;高铁酸盐预处理一后氯化组三氯甲烷生成量比后氯化组进一步减少,8份水源水样品,三氯甲烷平均减少69.0%,证实了高铁酸盐确有氧化分解三氯甲烷前体物的作用。用高铁酸钠碱溶液处理氰化镀镉废水,按Na_2FeO_4 /去除CN^-或Cd^(2+)=5～8的投量,沉淀24h后上清液达到排放标准,比单用氧化剂效果可靠,处理时间短。
This paper described a new water disinfectant-sodium ferrate(Na_2FeO_4) solution made by electrochemical means and its applications. Theproductivity was as much as 50-80 g/L in 3 hours' electrolysis of NaOH(45% ) solution with our EJ-260 anode, stabilizer complex and saparatingmembrane complex. With KOH being added to the solution, another dis-infectant, K_2FeO_4 in a solid form was produced and the total productivitywas more than 75%. Raw water was experimentally disinfected with either of these twodisinfectants (dosage of 2mg/l) at the pretreatment stage to replace chlo-rine during which the trichloromethane concentrations in our disinfectantmode showed a reduction of 43.6%-87.5% as compared with that usingchlorine in the pretreatment stage. Waste water from cyanic cadmium-plating process was also treatedwith these two disinfectants and, after settling for 24hrs the water wasup to the discharge standard.
出处
《解放军预防医学杂志》
CAS
北大核心
1991年第2期79-83,共5页
Journal of Preventive Medicine of Chinese People's Liberation Army
关键词
水消毒剂
高铁酸钠
废水处理
water disinfectant
Na_2FO_4
K_2FeO_4
wastewater treatment
