CAJ | 학술논문

零价铁和硝基苯反应后生成二价铁和苯胺，而苯胺也是地下水污染物。硫酸根自由基具有强氧化性，可以降解苯胺。而二价铁可以活化过硫酸盐产生硫酸根自由基，进而去除苯胺。本文研究了二价铁浓度、过硫酸盐浓度、苯胺初始浓度、体系初始pH、反应温度等因素对二价铁活化过硫酸盐去除水中苯胺处理效率的影响。结果表明：①） Fe2＋活化过硫酸盐生成SO4-·能快速并有效氧化降解苯胺，对于目标浓度为1000 mg/L 的苯胺而言， Fe2＋浓度为3.3 mmol/L， Na2 S2 O8浓度为4.4 mmol/L时，对苯胺有较佳降解效果，苯胺的降解率为86.33％。②体系对较低浓度的苯胺降解效果较好，当污染物初始浓度由1000 mg/L降低到500 mg/L和100 mg/L时，苯胺降解率由86.33％升高为90.27％和97.16％。③初始pH对苯胺的降解率影响较大，中性条件下（ pH＝7左右）降解率较好，高初始pH （pH＝9，11）和低初始pH条件（pH＝3，5）下均低于中性条件下苯胺的降解效率。④体系的温度变化对降解率影响不明显。
령개철화초기분반응후생성이개철화분알，이분알야시지하수오염물。류산근자유기구유강양화성，가이강해분알。이이개철가이활화과류산염산생류산근자유기，진이거제분알。본문연구료이개철농도、과류산염농도、분알초시농도、체계초시pH、반응온도등인소대이개철활화과류산염거제수중분알처리효솔적영향。결과표명：①） Fe2＋활화과류산염생성SO4-·능쾌속병유효양화강해분알，대우목표농도위1000 mg/L 적분알이언， Fe2＋농도위3.3 mmol/L， Na2 S2 O8농도위4.4 mmol/L시，대분알유교가강해효과，분알적강해솔위86.33％。②체계대교저농도적분알강해효과교호，당오염물초시농도유1000 mg/L강저도500 mg/L화100 mg/L시，분알강해솔유86.33％승고위90.27％화97.16％。③초시pH대분알적강해솔영향교대，중성조건하（ pH＝7좌우）강해솔교호，고초시pH （pH＝9，11）화저초시pH조건（pH＝3，5）하균저우중성조건하분알적강해효솔。④체계적온도변화대강해솔영향불명현。
The products of the reaction between zero-valent iron and nitrobenzene are Fe 2+and aniline , while aniline is the groundwater contaminant .Sulfate free radicals can degrade aniline with its strong oxidability , and they can be produced by persulfate activated by Fe 2+.The authors studied the influences of some factors such as the initial concentrations of Fe 2+, sulfate and aniline , pH and temperature , which were investigate to affect the ani-line degradation .The results indicate that: ①Sulfate free radicals produced by persulfate activated with Fe 2+, can oxidized and degrade the target pollutant aniline fastly and effectively .The optimum degradation rate of aniline reached 86.33%under the condition of 3.3 mmol/L Fe2+, 4.4 mmol/L PS and 1 000 mg/L aniline .②Low con-centrative aniline was degraded more effectively in the system .The degradation rates of aniline increased from 86.33%to 90.27%when the initial concentrations of the contaminant reduced from 1 000 mg/L to 500 mg/L, and it increased to 97.16% when the concentration of aniline was 100 mg/L.③Initial pH had a great impact on the aniline degragation , as the degragation rate was higher under the neutral condition ( around pH=7 ) than the alka-line (pH=9, 11) or acidic (pH=3, 5) conditions.④The effect of the temperature in the system on the degra-dation rate was not notable .