TY - JOUR

T1 - Integration of hydrochemical and induced polarization analysis for leachate localization in a municipal landfill

AU - Xia, Teng

AU - Meng, Jian

AU - Ding, Botao

AU - Chen, Zifang

AU - Liu, Shiliang

AU - Titov, Konstantin

AU - Mao, Deqiang

PY - 2023/2/1

Y1 - 2023/2/1

N2 - Landfills have been identified as a significant concern to the surrounding surface and groundwater ecosystem because of the discharge of leachate. To tackle the uncertain localization of the contamination plume due to low sampling densities, a combination of hydrochemical analysis and induced polarization survey (IP) is employed to characterize the leachate in a municipal landfill. The polarization effect in the contaminated area is significantly higher than expected for landfill sites, but relatively low chargeability zones (600 mS/m) areas. With reliable geophysical results confirmed by similar formation factors from both field and laboratory data, the abnormal high polarization effect is influenced by installed steel sheet piles next to the survey cable. In addition, we successfully identify linear relationship between the geophysical responses and dominant inorganic conservative compounds (Cl- and Na+) from the leachate plume. The gentle variations of borehole chemical parameters show that the plume is not affected by a continuous contamination source any more, indicating that the steel sheet pile effectively cut off the contamination from the leachate tanks. In conclusion, the integration of IP and hydrochemical data is an excellent way to locate contaminated zones and monitor the behaviors of leachate plume in the landfill.

AB - Landfills have been identified as a significant concern to the surrounding surface and groundwater ecosystem because of the discharge of leachate. To tackle the uncertain localization of the contamination plume due to low sampling densities, a combination of hydrochemical analysis and induced polarization survey (IP) is employed to characterize the leachate in a municipal landfill. The polarization effect in the contaminated area is significantly higher than expected for landfill sites, but relatively low chargeability zones (600 mS/m) areas. With reliable geophysical results confirmed by similar formation factors from both field and laboratory data, the abnormal high polarization effect is influenced by installed steel sheet piles next to the survey cable. In addition, we successfully identify linear relationship between the geophysical responses and dominant inorganic conservative compounds (Cl- and Na+) from the leachate plume. The gentle variations of borehole chemical parameters show that the plume is not affected by a continuous contamination source any more, indicating that the steel sheet pile effectively cut off the contamination from the leachate tanks. In conclusion, the integration of IP and hydrochemical data is an excellent way to locate contaminated zones and monitor the behaviors of leachate plume in the landfill.

KW - Hydrochemical analysis

KW - Induced polarization

KW - Landfill

KW - Leachate

UR - https://www.mendeley.com/catalogue/891ed3eb-06e1-3f7d-8d23-f7c3f379d30f/

U2 - 10.1016/j.wasman.2022.12.014

DO - 10.1016/j.wasman.2022.12.014

M3 - Article

VL - 157

SP - 130

EP - 140

JO - Waste Management

JF - Waste Management

SN - 0956-053X

ER -