绿色氧化剂K_2FeO_4对瓜尔胶的降解实验研究
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摘要
瓜尔胶在油田压裂液中作为稠化剂被广泛使用,作业后的压裂返排液中瓜尔胶难以自然降解,对环境造成严重危害;探索绿色高效处理油田压裂返排液的方法成为研究的热点和难点。本实验以K_2FeO_4为绿色高效氧化剂,对模拟压裂返排液(质量浓度为0.3‰瓜尔胶溶液)进行了降解实验研究,结果表明,当K_2FeO_4用量为0.5 g/L,反应温度30℃,反应pH值为12.0时,溶液降黏率最大可达89.27%,COD去除率为36.27%,且氧化剂反应为三价铁离子,绿色无污染。
Hydroxypropyl guar gum(HPG) is widely used as a thickening agent in fracturing fluids,which is difficult to degrade in natural environment after being flowed back to the ground and has caused great harm to the environment. The investigation of green and effective method to treat the flowback fluid has become the hot and difficult issues. This we used the green oxidant K_2FeO_4 to degrade the simulation solution of flowback fluid in the laboratory(the mass concentration was 0. 3‰ of HPG solution). The results show that the optimal reaction conditions is as below: When the usage of K_2FeO_4 is 0. 5 g/L,the reaction temperature is 30 ℃,the reaction pH is 12. 0,the viscosity degradation of HPG is reached 89.27%,and the COD degradation is reached at 36. 27% at the same time,the degradation products of oxidation agents are ferric ions without toxic and pollution.
Hydroxypropyl guar gum(HPG) is widely used as a thickening agent in fracturing fluids,which is difficult to degrade in natural environment after being flowed back to the ground and has caused great harm to the environment. The investigation of green and effective method to treat the flowback fluid has become the hot and difficult issues. This we used the green oxidant K_2FeO_4 to degrade the simulation solution of flowback fluid in the laboratory(the mass concentration was 0. 3‰ of HPG solution). The results show that the optimal reaction conditions is as below: When the usage of K_2FeO_4 is 0. 5 g/L,the reaction temperature is 30 ℃,the reaction pH is 12. 0,the viscosity degradation of HPG is reached 89.27%,and the COD degradation is reached at 36. 27% at the same time,the degradation products of oxidation agents are ferric ions without toxic and pollution.
引文
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[12]何则强,滕瑶,胡文勇,等.高铁酸钾的超声辅助化学合成及其对餐厨垃圾渗滤液的处理效果[J].环境工程学报,2016,10(2):551-558.
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[19]王丽伟,卢拥军,单文文,等.瓜尔胶低分子量化降解条件研究[J].油田化学,2006,23(1):32-35.
[20]阚连宝,段庆茹,王宝辉,等.Fe(Ⅵ)的特性分析及在水处理中的应用[J].化工进展,2011,30(8):1848-1853.
[21]姜阿娜,仲岩磊,陈凯,等.羟丙基瓜胶压裂液流变行为影响因素研究[J].中国石油大学胜利学院学报,2011,25(1):15-17.
[22]唐洪彪,王世彬,郭建春.p H值对羟丙基胍胶压裂液性能的影响[J].油田化学,2016,33(2):220-223.
[2]廖礼,周琳,冉照辉,等.超低浓度胍胶压裂液在苏里格气田的应用研究[J].钻采工艺,2013,36(5):96-100.
[3]Zhang D,Tingyun Y.Environmental impacts of hydraulic fracturing in shale gas development in the United States[J].Petroleum Exploration and Development,2015,42(6):876-883.
[4]Reddy T T,Tammishetti S.Free radical degradation of guar gum[J].Polymer Degradation and Stability,2004,86(3):455-459.
[5]Prajapat A L,Gogate P R.Depolymerization of guar gum solution using different approaches based on ultrasound and microwave irradiations[J].Chemical Engineering and Processing:Process Intensification,2015,88:1-9.
[6]张洁,胡龙刚,陈刚,等.高p H下催化H2O2对羟丙基瓜胶氧化降解[J].化学研究,2016(1):102-106.
[7]王满学,何静,杨志刚,等.生物酶SUN-1/过硫酸铵对羟丙基瓜胶压裂液破胶和降解作用[J].西安石油大学学报(自然科学版),2011,26(1):71-75.
[8]郭广军,周利英,何建平,等.瓜尔胶及其衍生物的过硫酸铵氧化降解研究[J].化学研究与应用,2010,22(12):1546-1550.
[9]苑志华,桂和荣,章刚,等.改性粉煤灰和高铁酸钾联合处理矿井水的研究[J].环境工程学报,2010(1):76-80.
[10]王丽娜,薛改凤,张垒,等.高铁酸盐对焦化废水的氧化-混凝深度处理[J].化工环保,2015,35(4):359-362.
[11]冯银芳,宁寻安,巫俊楫,等.超声耦合高铁酸钾对印染污泥脱水性能的影响[J].环境工程学报,2016,7:3786-3792.
[12]何则强,滕瑶,胡文勇,等.高铁酸钾的超声辅助化学合成及其对餐厨垃圾渗滤液的处理效果[J].环境工程学报,2016,10(2):551-558.
[13]张洋,罗志勇,屈勇军,等.高铁酸钾预处理垃圾渗滤液[J].环境工程学报,2014(6):2451-2455.
[14]温国蛟,员建,郭江.高铁酸盐预氧化技术在饮用水处理中的应用[J].环境科学与技术,2010(2):397-402.
[15]杨滨,应光国,赵建亮,等.高铁酸钾氧化降解新兴有机污染物的研究进展[J].环境化学,2013,32(1):54-64.
[16]Licht S,Tel-Vered R,Halperin L.Direct electrochemical preparation of solid Fe(Ⅵ)ferrate,and super-iron battery compounds[J].Electrochemistry Communications,2002,4(11):933-937.
[17]宋华,王宝辉.绿色合成氧化剂高铁酸盐[J].化学通报,2003,66(4):252-257.
[18]任占春,孙慧毅.瓜尔胶压裂液的研究及应用[J].石油钻采工艺,1996,18(1):82-88.
[19]王丽伟,卢拥军,单文文,等.瓜尔胶低分子量化降解条件研究[J].油田化学,2006,23(1):32-35.
[20]阚连宝,段庆茹,王宝辉,等.Fe(Ⅵ)的特性分析及在水处理中的应用[J].化工进展,2011,30(8):1848-1853.
[21]姜阿娜,仲岩磊,陈凯,等.羟丙基瓜胶压裂液流变行为影响因素研究[J].中国石油大学胜利学院学报,2011,25(1):15-17.
[22]唐洪彪,王世彬,郭建春.p H值对羟丙基胍胶压裂液性能的影响[J].油田化学,2016,33(2):220-223.
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