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
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.
李天一, 张成武, 郭超, 王贺飞, 呼博识, 秦传玉. 纳米CaO2在含水层的迁移特性及对氯酚降解效果[J]. 中国环境科学, 2017, 37(8): 3028-3035.
LI Tian-Yi, ZHANG Cheng-Wu, GUO Chao, WANG He-Fei, HU Bo-Shi, QIN Chuan-Yu. Migration characteristics of nano calcium peroxide in aquifer and its effect on degradation of 2,4-two chlorophenol. CHINA ENVIRONMENTAL SCIENCECE, 2017, 37(8): 3028-3035.
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