|
|
|
| Migration characteristics of nano calcium peroxide in aquifer and its effect on degradation of 2,4-two chlorophenol |
| LI Tian-Yi1,2, ZHANG Cheng-Wu1,2, GUO Chao1,2, WANG He-Fei3, HU Bo-Shi2, QIN Chuan-Yu1,2 |
1. Key Laboratory of Groundwater Resources and Environment, Ministry of Education, Jilin University, Changchun 130021, China;
2. College of Environment and Resources, Jilin University, Changchun 130021, China;
3. College of Environment and Resources, Zhejiang University, Hangzhou 310000, China |
|
|
|
|
Abstract In order to explore the feasibility of CaO2 used in Modified Fenton (MF) technology for remediation of contaminated groundwater, series static batch test and dynamic simulation column experiments were carried out to characterize the deposition and migration of nano CaO2 in water and aquifer respectively. The effect of pH, Fe2+ concentration and CaO2 dosage on the degradation of 2,4-dichlorophenol (2,4-DCP) using nano CaO2 was also evaluated. The results show that the nano CaO2 particles, coated with polyethylene glycol (PEG), were in the size of 30~50nm. The surface modified nano CaO2 particles were well dispersed in the solution, then a stable colloidal system was formed. Good migration performance was observed for nano CaO2 in aquifer, even in fine sand porous media with a low permeability. 2,4-DCP was effectively removed by the nano CaO2 MF system. The optimal condition for the degradation of 2,4-DCP in this experiment was at pH value as 5, the molar ratio of Fe2+ to 2,4-DCP as 8:1, and the molar ratio of CaO2 to 2,4-DCP as 96:1.These results show that nano CaO2 has a good application prospect in site remediation.
|
|
Received: 04 January 2017
|
|
|
|
|
|
| [1] |
Ho C L, Shebl C L, Watts R J. Development of an injection system for in situ catalyzed peroxide remediation of contaminated soils, Hazard.[J]. Waste Hazard. Mater. 1995(12):15-25.
|
| [2] |
Xu L J, Wang J L. Fenton-like degradation of 2,4-dichlorophenol using Fe3O4 magnetic nanoparticles[J]. Appl. Catal. B:Environ. 123-124,2012,117-126.
|
| [3] |
范春贞,李彩亭,路培,等.类芬顿试剂液相氧化法脱硝的实验研究[J]. 中国环境科学, 2012,32(6):988-993.
|
| [4] |
Rosas J M, Vicente F, Saguillo E G, et al. Remediation of soil polluted with herbicides by Fenton-like reaction:Kinetic model of diuron degradation[J]. Applied Catalysis B:Environmental, 2014,144:252-260.
|
| [5] |
孙猛,董军,耿方兰,等.基于含水层介质中铁的类Fenton技术去除地下水中硝基苯[J]. 中南大学学报(自然科学版), 2012, 43(5):2004-2009.
|
| [6] |
Schmidt J T, Ahmad M, Teel A L, et al. Hydrogen peroxide stabilization in one-dimensional flow columns[J]. Journal of Contaminant Hydrology, 2011,126(1/2):1-7.
|
| [7] |
Xu P, Achari G, Mahmoud M, et al. Application of fenton's reagent to remediate diesel contaminated soils[J]. Practice Periodical of Hazardous Toxic and Radioactive Waste Management, 2006,10:19-27.
|
| [8] |
Chen G, Hoag G E, Chedda P, et al. The mechanisms and applicability of in situ oxidation of trichloroethylene with Fenton's reagent[J]. Journal of Hazardous Materials, 2001,B87:171-186.
|
| [9] |
Northup A, Cassidy D. Calcium peroxide (CaO2) for use in modified Fenton chemistry[J]. Journal of Hazardous Materials, 2008,152:1164-1170.
|
| [10] |
Arienzo M. Degradation of 2,4,6-trinitrotoluene in water and soil slurry utilizing a calcium peroxide compound[J]. Chemosphere, 2000,40:331-337.
|
| [11] |
Xu J, Pancras T, Grotenhuis T. Chemical oxidation of cable insulating oil contaminated soil[J]. Chemosphere, 2011,84:272-277.
|
| [12] |
Wang H F, Zhao Y S, Li T Y, et al. Properties of calcium peroxide for release of hydrogen peroxide and oxygen:a kinetics study[J]. Chemical Engineering Journal., 2016,29(4):765-770.
|
| [13] |
Qian Y, Zhou X, Zhang Y, et al. Performance and properties of nanoscale calcium peroxide for toluene removal[J]. Chemosphere, 2013,91:717-723.
|
| [14] |
Ndjou'ou A C, Cassidy D. Surfactant production accompanying the modified Fenton oxidation of hydrocarbons in soil[J]. Chemosphere, 2006,65:1610-1615.
|
| [15] |
Saleh N, Kim H J, Phenrat T, et al. Ionic strength and composition affect the mobility of surface-modified Fe0 nanoparticles in water-saturated sand columns[J]. Environ. Sci. Technol. 2008,42:3349-3355.
|
| [16] |
Shang J, Liu C, Wang Z. Transport and retention of engineered nanoporous particles in porous media:Effects of concentration and flow dynamics[J]. Colloids and Surfaces A:Physicochemical and Engineering Aspects, 2013,417:89-98.
|
| [17] |
Bai C, Li Y. Modeling the transport and retention of nC60 nanoparticles in the subsurface under different release scenarios[J]. Journal of Contaminant Hydrology, 2012,136-137:43-55.
|
| [18] |
Qian Y J, Zhang J, Zhang Y L, et al. Degradation of2,4-dichlorophenol by nanoscale calcium peroxide:Implication for groundwater remediation[J]. Separation and Purification Technology, 2016,166:222-229.
|
| [19] |
He F, Zhang M, Qian T W, et al. Transport of carboxymethyl cellulose stabilized iron nanoparticles in porous media:column experiments and modeling[J]. J Colloid.Interf. Sci. 2009,334(1):96-102.
|
| [20] |
Chevalier L R, McCann C. Feasibility of calcium peroxide as an oxygen releasing compound in treatment walls[J]. Int. J. Environ. Waste Manage. 2008,2:245-256.
|
| [21] |
Wang M Q,Wang N, Tang H Q, et al. Surface modification of nano-Fe3O4 with EDTA and its use in H2O2 activation for removing organic pollutants[J]. Catal. Sci. Technol. 2012,2:187-194.
|
| [22] |
Zhang X, Gu X, Lu S, et al. Degradation of trichloroethylene in aqueous solution by calcium peroxide activated with ferrous ion[J]. J. Hazard. Mater. 2015,284:253-260.
|
|
|
|
