Abstract: The degradation efficiencies of 2,4-dichlorophenol in aqueous solution by sodium persulfate (Na2S2O8) with different activation methods are compared,and the influences of activation temperature,Na2S2O8 dosage,initial pH,reaction time and initial concentration of 2,4-dichlorophenol are investigated systematically.The results show that the activation effect on Na2S2O8 is in the order of thermal activation > alkaline activation > ultrasonic activation > H2O2 activation > no activation.Heating up is beneficial to increasing the activation efficiency of Na2S2O8,The best degradation efficiency can be gained by using Na2S2O8 that is activated under 60℃.Almost all of 2,4-dichlorophenol in aqueous solution can be degraded over thermal activated Na2S2O8 in the optimal treatment conditions that the mole ratio of 2,4-dichlorophenol and Na2S2O8 is 1:30,Na2S2O8 is added by three times,pH is in the range of 11-12,reaction time is 40 min and the initial concentration of 2,4-dichlorophenol is less than 50 mg·L-1 in aqueous solution.The results confirm that the oxidation technology using thermal activated Na2S2O8 can apply to treating with 2,4-dichlorophenol-contaminated wastewater.
[1] 张娟,黄彦旻,吴斌程,等.羟胺强化Fe(Ⅱ)/过一硫酸盐体系降解氯酚的研究[J].现代化工,2017,37(8):94-97,99. [2] 肖鹏飞,宋玉珍.表面活性剂洗脱/类Fenton氧化对六氯苯污染黑土的处理[J].环境工程学报,2017,11(7):4383-4389. [3] 魏海江,杨兴伦,叶茂,等.活化过硫酸钠氧化法修复DDTs污染场地土壤研究[J].土壤,2014,46(3):504-511. [4] 赵霞,Ismoilov B,李亚斌,等.污水高级氧化技术的研究现状及其新进展[J].水处理技术,2018,44(4):7-10,16. [5] 杨世迎,杨鑫,王萍,等.过硫酸盐高级氧化技术的活化方法研究进展[J].现代化工,2009,29(4):13-19. [6] 朱思瑞,高乃云,鲁仙,等.热激活过硫酸盐氧化降解水中双酚A[J].中国环境科学,2017,37(1):188-194. [7] Deng J,Shao Y,Gao N,et al.Thermally activated persulfate (TAP) oxidation of antiepileptic drug carbamazepine in water[J].Chemical Engineering Journal,2013,228:765-771. [8] 蒋梦迪,张清越,季跃飞,等.热活化过硫酸盐降解三氯生[J].环境科学,2018,39(4):1661-1667. [9] 马京帅,吕文英,刘国光,等.热活化过硫酸盐降解水中的普萘洛尔[J].环境化学,2017,36(2):221-228. [10] 林国峰,任峰,孙军益,等.热激活过硫酸盐降解水中双氯芬酸钠机理[J].净水技术,2017,36(S2):93-96,144. [11] Waldemer R H,Tratnyek P G,Johnson R L,et al.Oxidation of chlorinated ethenes by heat activated persulfate:Kinetics and products[J].Environ Sci Technol,2007,41(3):1010-1015. [12] 顾小钢,吕树光,邱兆富,等.热活化过硫酸钠处理水溶液及泥浆系统中1,1,1-三氯乙烷的研究[J].环境科学学报,2012,32(6):1374-1380. [13] Liang C,Huang C F,Chen Y J.Potential for activated persulfate degradation of BTEX contamination[J].Water Research,2008,42(15):4091-4100. [14] Huang K C,Zhao Z,Hong G E,et al.Degradation of volatile organic compounds with thermally activated persulfate oxidation[J].Chemosphere,2005,61:551-560. [15] Liang C,Bruell C J,Marley M C,et al.Persulfate oxidation for in situ remediation of TCE.Ⅱ.Activated by chelated ferrous ion[J].Chemosphere,2004,55(9):1225-1233. [16] 朱杰,罗启仕,郭琳,等.碱热活化过硫酸盐氧化水中氯苯的试验[J].环境化学,2013,32(12):2256-2262. [17] 吴昊,孙丽娜,李玉双,等.活化过硫酸钠去除长期污染土壤中的TPH[J].环境工程学报,2016,10(9):5231-5237. [18] 赵进英,张耀斌,全燮,等.加热和亚铁离子活化过硫酸钠氧化降解4-CP的研究[J].环境科学,2010,31(5):1233-1238.