长江科学院院报
長江科學院院報
장강과학원원보
JOURNAL OF YANGTZE RIVER SCIENTIFIC RESEARCH INSTITUTE
2015年
6期
49-52,58
,共5页
林莉%谢雯静%赵良元%冯璁
林莉%謝雯靜%趙良元%馮璁
림리%사문정%조량원%풍총
电化学%尿素降解%活性氯%电流密度%氯离子浓度
電化學%尿素降解%活性氯%電流密度%氯離子濃度
전화학%뇨소강해%활성록%전류밀도%록리자농도
electrochemical method%urea degradation%active chlorine%current density%chloride ion concentration
采用微电流电解技术对模拟游泳池水中的尿素进行降解处理,探索了电解对尿素的去除机理,研究了电流密度和氯离子浓度等因素对电解去除尿素效果的影响。结果表明:以钌钛和不锈钢分别做阳极和阴极材料,当水溶液中有较高浓度的氯离子存在时,电解过程中产生的活性氯使得尿素被氧化,尿素降解产物中无氨氮、氯胺等二次污染物,尿素极有可能通过电解生成了N2等气体挥发到空气中。电流密度和氯离子浓度对尿素的去除效率有很大影响,随着电流密度和氯离子浓度的增加,尿素去除效率逐渐上升。在500 mg/L的氯离子浓度条件下,电流密度为12 mA/cm2时,电解处理30 min时尿素去除率可达99.5%。将微电流电解技术应用于游泳池水中的尿素去除,无需添加电解质,即能达到较高的尿素去除效果,采用该技术对游泳池水中的尿素进行降解去除完全可行。
採用微電流電解技術對模擬遊泳池水中的尿素進行降解處理,探索瞭電解對尿素的去除機理,研究瞭電流密度和氯離子濃度等因素對電解去除尿素效果的影響。結果錶明:以釕鈦和不鏽鋼分彆做暘極和陰極材料,噹水溶液中有較高濃度的氯離子存在時,電解過程中產生的活性氯使得尿素被氧化,尿素降解產物中無氨氮、氯胺等二次汙染物,尿素極有可能通過電解生成瞭N2等氣體揮髮到空氣中。電流密度和氯離子濃度對尿素的去除效率有很大影響,隨著電流密度和氯離子濃度的增加,尿素去除效率逐漸上升。在500 mg/L的氯離子濃度條件下,電流密度為12 mA/cm2時,電解處理30 min時尿素去除率可達99.5%。將微電流電解技術應用于遊泳池水中的尿素去除,無需添加電解質,即能達到較高的尿素去除效果,採用該技術對遊泳池水中的尿素進行降解去除完全可行。
채용미전류전해기술대모의유영지수중적뇨소진행강해처리,탐색료전해대뇨소적거제궤리,연구료전류밀도화록리자농도등인소대전해거제뇨소효과적영향。결과표명:이조태화불수강분별주양겁화음겁재료,당수용액중유교고농도적록리자존재시,전해과정중산생적활성록사득뇨소피양화,뇨소강해산물중무안담、록알등이차오염물,뇨소겁유가능통과전해생성료N2등기체휘발도공기중。전류밀도화록리자농도대뇨소적거제효솔유흔대영향,수착전류밀도화록리자농도적증가,뇨소거제효솔축점상승。재500 mg/L적록리자농도조건하,전류밀도위12 mA/cm2시,전해처리30 min시뇨소거제솔가체99.5%。장미전류전해기술응용우유영지수중적뇨소거제,무수첨가전해질,즉능체도교고적뇨소거제효과,채용해기술대유영지수중적뇨소진행강해거제완전가행。
In this research,urea in swimming pools was treated by low-amperage electric current,and the influence factors including current density and chloride ion concentration and the mechanism of electrolytic removal of urea were investigated.Results indicated that urea was oxidized by active chlorine which was produced when there was high concentration of chloride ion in the solution with ruthenium-titanium as anode material and stainless steel as cathode material.No harmful by-product such as ammonia nitrogen or chloramines was produced.Urea possibly de-graded into gases like N2 and volatilized into the air.Current density and chloride ion concentration have great effect on the efficiency of urea removal.The removal of urea increased with the rise of current density and chloride ion concentration.Urea removal rate reached 99.5%at current density of 12 mA/cm2 and chloride ion concentra-tion of 400 mg/L by 30 min of electrolytic treatment.Due to the high removal rate of urea by electrolysis treatment with no need of electrolyte,electrolytic removal of urea by low-amperage electric current is feasible for the treatment of swimming pool water.