DAI Guozhong,SHENG Yanmin,LI Shujin,et al.Experimental Study on Adsorption Property of PBFC Anti⁃seepage Slurry in Landfill[J].Journal of Disaster Prevention and Mitigation Engineering,2021,41(03):470-476.
DAI Guozhong,SHENG Yanmin,LI Shujin,et al.Experimental Study on Adsorption Property of PBFC Anti⁃seepage Slurry in Landfill[J].Journal of Disaster Prevention and Mitigation Engineering,2021,41(03):470-476. DOI: 10.13409/j.cnki.jdpme.201907050.
Experimental Study on Adsorption Property of PBFC Anti⁃seepage Slurry in Landfill
A low permeability anti-seepage slurry material (PBFC anti-seepage slurry material) was prepared with cement-bentonite as the main material, fly ash as the substitute for part of cement, together with sodium carbonate, polyvinyl alcohol (PVA), and other admixtures, which has good adsorption and retardation effect on landfill leachate. The adsorption and retardation mechanism of the slurry was discussed through adsorption and retardation tests and SEM micro-analysis. The SEM results show that adding PVA can make cement hydration reaction more sufficient, thus improving the adsorption performance of slurry. When the PVA content of PBFC anti-seepage slurry is 1.5 g/L, the permeability coefficient can be as low as 0.7×10-8 cm/s. Through the effective use of PBFC anti-seepage slurry, the concentration of some harmful components in landfill leachate meets the requirement of Pollution Control Standard for Municipal Domestic Waste Landfill. When the content of PVA is 1.5 g/L, the concentration of harmful components in leachate decreases to the lowest level, which is consistent with the effect of PVA on the permeability coefficient of the anti-seepage slurry. The adsorption retardation rate of the PBFC anti-seepage slurry to heavy metal ions, such as lead and mercury, is close to 100%, which meets the use requirements of domestic garbage landfills.
Cao X Y . Natural attenuation process of NH 3 -N in aged leachate leakage under the salt water condition [J]. Environmental Science & Technology , 2012 , 35 ( Sup 1 ): 41 - 45 . (in Chinese)
Zhang Y L , Ding X M , Liu H L , et al . Microstructure characteristics of heavy metal contaminated soil in a waste lead smelter in Chongqing [J]. Journal of Disaster Prevention and Mitigation Engineering , 2018 , 38 ( 5 ): 809 - 814 . (in Chinese)
Liu R , Du Y J , Mei D B , et al . Experimental study on characteristics of soil-bentonite vertical isolation engineering barrier to prevent heavy metal pollutants from moving [J]. Journal of Disaster Prevention and Mitigation Engineering , 2018 , 38 ( 5 ): 815 - 821 . (in Chinese)
Dai G Zh , Sheng Y M , Li Sh J , et al . Experiment analysis on the groutability of PBFC impervious material of waste landfill [J]. Bulletin of the Chinese Ceramic Society , 2018 , 37 ( 2 ): 1 - 4 . (in Chinese)
Guler E , Ozhan H O , Karaoglu S . Hydraulic performance of anionic polymer-treated bentonite-granular soil mixtures [J]. Applied Clay Science , 2018 , 157 : 139 - 147 .
Norris A , Di Emidio G , Malusis M A , et al . Modified bentonites for soil-bentonite cutoff wall applications with hard mix water [J]. Applied Clay Science , 2018 , 158 : 226 - 235 .
Garvin S L , Hayles C S . The chemical compatibility of cement⁃bentonite cut-off wall material [J]. Construction & Building Materials , 1999 , 13 ( 6 ): 329 - 341 .
Smith L A , Barbour S L , Hendry M J , et al . A multiscale approach to determine hydraulic conductivity in thick claystone aquitards using field, laboratory, and numerical modeling methods [J]. Water Resources Research , 2016 , 52 ( 7 ): 5265 - 5284 .
Liu X G , Wang Y Ch , Shao H , et al . Experimental study on landfill liners made from modified bentonite [J]. Chinese Journal of Environmental Engineering , 2013 , 7 ( 11 ): 4513 - 4518 . (in Chinese)
Liu Zh G , Zhang C W , Yang K R . Effect of polyvinyl alcohol on strength of geopolymeric cement and its mechanism [J]. Journal of North China University of Science and Technology(Natural Science Edition) , 2006 , 28 ( 4 ): 93 - 96 . (in Chinese) .
Standard for pollution control on the landfill site of municipal solid waste : GB16889—2008 [S]. Beijing : China Environmental Science Press , 2008 . (in Chinese)
Tian Z Sh , Tian Y , Jin N G , et al . Relation between resistivity method and thermodynamic method on assessment of portland cement hydration [J]. Journal of the Chinese Ceramic Society , 2018 , 46 ( 5 ): 58 - 64 . (in Chinese)
Dai G Z , Zhu J , Shi G C . Analysis on the basic properties of PBFC anti seepage slurry in landfill [J]. Applied Ecology and Environmental Research , 2018 , 16 ( 6 ): 7657 - 7667 .
Huang X , Xiao K , Shen Y . Recent advances in membrane bioreactor technology for wastewater treatment in China [J]. Frontiers of Environmental Science & Engineering in China , 2010 , 4 ( 3 ): 245 - 271 .
Dong X L , Dong Sh N , Wang B , et al . Adsorption performance of Zn 2+ and Mn 2+ from coal gangue leachate on geosynthetic clay liners [J]. Coal Science and Technology , 2017 , 45 ( 12 ): 7 - 12 . (in Chinese)
Wu L N , Peng Y Zh , Wang Sh Y , et al . Effect of free ammonia on the short-cut nitrification of the municipal landfill leachate [J]. Environmental Science , 2008 , 29 ( 12 ): 3428 - 3432 . (in Chinese)
Lyu B , Yang K , Zhou P J , et al . Factors effecting shortcut nitrification for treatment of advanced stage landfill leachate [J]. Journal of Harbin Institute of Technology , 2006 , 38 ( 6 ): 931 - 933 . (in Chinese)
Hassan M , Xie B . Use of aged refuse-based bioreactor/biofilter for landfill leachate treatment [J]. Apply Microbiol Biotechnol , 2014 , 98 ( 15 ): 6543 - 6553 .