石油烃污染土壤颗粒运动状态与脱附关系数值模拟
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摘要
针对土壤中石油烃污染的脱附,采用计算模拟方法对污染土壤颗粒的运动状态与脱附关系进行了研究。结果表明,颗粒中污染物的脱附效果与其运动状态有关,脱附效果由低至高排序为颗粒静止<直线运动<螺旋运动,且颗粒做螺旋运动对污染物的脱附较其他运动状态更为均匀;螺旋运动的脱附效果与旋向无关,但与运动圈数有关,单位时间内螺旋运动的圈数越多,颗粒的脱附效果越好。基于上述结果,设计了一种管式涡流结构以期实现颗粒的螺旋运动,实现了土壤颗粒中石油烃污染物的强化脱附。利用Fluent模拟了不同管式涡流结构的流体流动形态及颗粒运动轨迹,发现螺旋叶片的旋向能够调控颗粒的运动旋向,螺旋叶片的导程能够调控颗粒的运动圈数。
In this study, the CFD software Fluent was used to study the relationship between the motion status and desorption efficiency of petroleum hydrocarbon contaminated soil particles. The results showed that the pollutant desorption efficiency was related to particle motion status, and the desorption efficiency ranked in ascending order as stationary
In this study, the CFD software Fluent was used to study the relationship between the motion status and desorption efficiency of petroleum hydrocarbon contaminated soil particles. The results showed that the pollutant desorption efficiency was related to particle motion status, and the desorption efficiency ranked in ascending order as stationary
引文
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[2]KHODARY S M,NEGM A M,TAWFIK A.Geotechnical properties of the soils contaminated with oils,landfill leachate,and fertilizers[J].Arabian Journal of Geosciences,2018,11(2):13-29.
[3]ZHU H,GAO Y,LI D.Germination of grass species in soil affected by crude oil contamination[J].International Journal of Phytoremediation,2018,20(6):567-573.
[4]MULLAKAEV M S,VEXLER G B,MULLAKAEV R M.Sonochemical technology for separating oil sludge and oilcontaminated soil[J].Petroleum Science and Technology,2018,36(8):604-608.
[5]EGAZAR'YANTS S,VINOKUROV V,VUTOLKINA A,et al.Oil sludge treatment processes[J].Chemistry and Technology of Fuels and Oils,2015,51(5):506-515.
[6]LIU C,ZHANG Y,SUN S,et al.Oil recovery from tank bottom sludge using rhamnolipids[J].Journal of Petroleum Science and Engineering,2018,170:14-20.
[7]GITIPOUR S,HEDAYATI M,MADADIAN E.Soil washing for reduction of aromatic and aliphatic contaminants in soil[J].Clean-Soil Air Water,2015,43(10):1419-1425.
[8]LI G,GUO S,HU J.The influence of clay minerals and surfactants on hydrocarbon removal during the washing of petroleumcontaminated soil[J].Chemical Engineering Journal,2016,286:191-197.
[9]WU H,SUN L,WANG H,et al.Persulfate oxidation for the remediation of petroleum hydrocarbon-contaminated soils[J].Polish Journal of Environmental Studies,2016,25(2):851-857.
[10]CHEN K,CHANG Y,CHIOU W.Remediation of diesel-contaminated soil using in situ chemical oxidation(ISCO)and the effects of common oxidants on the indigenous microbial community:A comparison study[J].Journal of Chemical Technology and Biotechnology,2016,91(6):1877-1888.
[11]李婷婷,郭书海,王加宁,等.周期切换电极极性对电动-微生物修复石油污染土壤的影响[J].环境工程,2016,34(1):159-163.
[12]LOMZA P,POSZYTEK K,SKLODOWSKA A,et al.Evaluation of bioremediation of soil highly contaminated by petroleumhydrocarbons[J].New Biotechnology,2016,33:141.
[13]张秀霞,滕芝,吴佳东.生物强化修复石油污染土壤[J].环境工程学报,2013,7(4):1573-1577.
[14]FENG D,LORENZEN L,ALDRICH C,et al.Ex situ diesel contaminated soil washing with mechanical methods[J].Minerals Engineering,2001,14(9):1093-1100.
[15]SON Y,CHA J,LIM M,et al.Comparison of ultrasonic and conventional mechanical soil-washing processes for dieselcontaminated sand[J].Industrial and Engineering Chemistry Research,2011,50(4):2400-2407.
[16]刘珑,王殿生,曾秋孙,等.微波修复石油污染土壤升温特性影响因素的实验研究[J].环境工程学报,2011,5(4):898-902.
[17]GAO Y,DING R,WU S,et al.Influence of ultrasonic waves on the removal of different oil components from oily sludge[J].Environmental Technology,2015,36(14):1771-1775.
[18]孙荣江,侯峰,丁焱梁,等.重金属污染土壤旋流洗脱设备的设计及性能评估[J].环境工程学报,2018,12(4):1208-1217.
[19]HUANG Y,LI J,ZHANG Y,et al.High-speed particle rotation for coating oil removal by hydrocyclone[J].Separation and Purification Technology,2017,177:263-271.
[20]竺嘉斌.变径式微混器结构参数的优化研究[D].上海:华东理工大学,2018.
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