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column test of gasoline hydrocarbon removal from soil by soil vapor extracting

Acta Geochimica 2006年第S1期 254-255页

作者： Wei HE, Honghan CHEN, Fei LIU, Chunfang ZHU Key Laboratory of Water Resources & Environmental Engineering, China University of Geosciences, Beijing 100083, China

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Hydrous cerium oxides coated glass fiber for efficient and long-lasting arsenic removal from drinking water

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Journal of Advanced Ceramics 2021年第2期10卷 247-257页

作者： Ronghui Li Weiyi Yang Shuang Gao Jianku Shang Qi Li School of Gemology and Material Technology Hebei GEO UniversityShijiazhuang050031China Key Laboratory of Advanced Technologies of Materials(Ministry of Education) School of Materials Science and EngineeringSouthwest Jiaotong UniversityChengdu610031China Shenyang National Laboratory for Materials Science Institute of Metal ResearchChinese Academy of SciencesShenyang110016China

A novel arsenic adsorbent with hydrous cerium oxides coated on glass fiber cloth(HCO/GFC)was *** HCO/GFC adsorbents were rolled into a cartridge for arsenic removal *** to the large pores between the glass fibers,the arsenic polluted water can flow through *** arsenic removal performance was evaluated by testing the equilibrium adsorption isotherm,adsorption kinetics,and packed-bed *** pH effects on arsenic removal were *** test results show that HCO/GFC filter has high As(Ⅴ)and As(Ⅲ)removal capacity even at low equilibrium *** more toxic As(Ⅲ)in water can be easily removed within a wide range of solution p H without *** contaminated ground-water from Yangzong Lake(China)was used in the column *** typical breakthrough conditions(the empty bed contact time,EBCT=2 min),arsenic researched breakthrough at over 24,000 bed volumes(World Health Organization(WHO)suggested that the maximum contaminant level(MCL)for arsenic in drinking water is 10 mg/L).The Ce content in the treated water was lower than 5 ppb during the column test,which showed that cerium did not leach from the HCO/GFC material into the treated *** relationship between dosage of adsorbents and the adsorption kinetic model was also clarified,which suggested that the pseudo second order model could fit the kinetic experimental data better when the adsorbent loading was relatively low,and the pseudo first order model could fit the kinetic experimental data better when the adsorbent loading amount was relatively high.

关键词： hydrous cerium oxide(HCO) glass fiber cloth(GFC) column test adsorption kinetics adsorption mechanism

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Migration of Biodegradable Organic Matter in Underlying Soils of Household Waste Dumpsites: A Case Study in Abomey-Calavi, Benin

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Journal of Crystallization Process and Technology 2018年第1期8卷 18-32页

作者： Metogbe B.Djihouessi Sofiath Onifade Martin P.Aina Hervé E.Labité Francois de Paule Codo Laboratoire des Sciences et Techniques de l’Eau(LSTE) Institut National de l’EauUniversitéd’Abomey-Calavi(UAC)CotonouBénin Institut National de l’Eau(INE) Universitéd’Abomey-Calavi(UAC)CotonouBénin

This paper presented the first part of the studies about the development of a tool for groundwater contamination prediction, conducted by the Laboratory of Sciences and Technology of Water (UAC/Benin). The investigation made consisted in estimating the combined effect of retardation factor and biodegradation on migration processes of leachate, in the underlying soils of household waste dumpsites, without active safety barrier. Leachate infiltration tests for different initial conditions were made on soil columns and the breakthrough curves were traced for electrical conductivity, the 5 day biochemical oxygen demand (BOD5) and total kjeldahl nitrogen TKN. A mathematical migration model was developed and solved numerically by finite difference method and implemented with Matlab R2013a. Thus, the calibration of the model was made with electric conductivity data by determining the dispersion coefficient of the studied soils (D = 0.96 cm2/min). Simulations for model verification showed that the established model can perfectly predict the migration of biodegradable organic pollution (BOD5) but did not give conclusive results for the monitoring of nitrogenous organic matter (TKN). The influence of the retardation factor on the migration of biodegradable organic pollutants in soils was linear, while the biodegradation rate of the organic material on migration showed an exponential pattern.

关键词： Waste Dumpsites Pollutants Biodegradability Soil Dispersion column test Biodegradable Organic Pollution Nitrogenous Organic Matter

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