TiO_(2)@palygorskite composite for the efficient remediation of oil spills via a dispersion-photodegradation synergy  

作　　者：Chenchen Li Lijie Yan Yiming Li Dan Zhang Mutai Bao Limei Dong 

机构地区：[1]Key Laboratory of Marine Chemistry Theory and Technology,Ministry of Education,Ocean University of China,Qingdao,266100,China

出　　处：《Frontiers of Environmental Science & Engineering》2021年第4期273-285,共13页环境科学与工程前沿（英文）

基　　金：This research was supported by the Key Development Program of Science and Technology in Shandong Province(No.2018GSF117041);the National Natural Science Foundation of China(Grant No.21773219);and the Qingdao National Laboratory for Marine Science and Technology(QNLM2016ORP0308);This is MCTL contribution No.225.

摘　　要：Removing spilled oil from the water surface is critically important given that oil spill accidents are a common occurrence.In this study,TiO_(2)@Palygorskite composite prepared by a simple coprecipitation method was used for oil spill remediation via a dispersion-photodegradation synergy.Diesel could be efficiently dispersed into small oil droplets by TiO_(2)@Palygorskite.These dispersed droplets had an average diameter of 20-30µm and exhibited good time stability.The tight adsorption of TiO_(2)@Palygorskite on the surface of the droplets was observed in fluorescence and SEM images.As a particulate dispersant,the direct contact of TiO_(2)@Palygorskite with oil pollutants effectively enhanced the photodegradation efficiency of TiO_(2)for oil.During the photodegradation process,·O_(2)^(−)and•OH were detected by ESR and radical trapping experiments.The photodegradation efficiency of diesel by TiO_(2)@Palygorskite was enhanced by about 5 times compared with pure TiO_(2)under simulated sunlight irradiation.The establishment of this new dispersion-photodegradation synergistic remediation system provides a new direction for the development of marine oil spill remediation.

关 键 词：PALYGORSKITE TiO_(2) Pickering emulsion Oil spill DISPERSION PHOTODEGRADATION 

分 类 号：TB33[一般工业技术—材料科学与工程]