Assessment of Seasonal Variation of Landfill Leachate Quality and its Pollution Potential - A Dhapa MSW Landfill Site, Kolkata Case Study

Authors

  • Sanjib Kumar Maiti Research Scholar, Environmental Engineering Division, Department of Civil Engineering, Jadavpur University, Kolkata, India
  • Sushmita De Research Scholar, Environmental Engineering Division, Department of Civil Engineering, Jadavpur University, Kolkata, India,
  • Tumpa Hazra Assistant Professor, Environmental Engineering Division, Department of Civil Engineering, Jadavpur University, Kolkata, India
  • Anupam Debsarkar Associate Professor, Environmental Engineering Division, Department of Civil Engineering, Jadavpur University, Kolkata, India
  • Amit Dutta Associate Professor, Environmental Engineering Division, Department of Civil Engineering, Jadavpur University, Kolkata, India

Keywords:

Dumping Sites; Leachate; Contamination Potential; Seasonal Variation; Leachate Pollution Index

Abstract

Remediating the toxic effect of MSW landfill leachate is the prime task in front of all environmentalists around
the globe. Dhapa is a solid waste disposal site situated in Kolkata, West Bengal, India. Numerous toxic chemicals are
leaching through this landfill leading to generation of leachate. Consequently, adjacent surface water bodies and
groundwater courses are getting contaminated by toxic pollutants. Leachate samples were collected from five different
locations of the landfill site during pre-monsoon and post-monsoon seasons. Analysis was made for various parameters
to evaluate the seasonal variation of leachate quality and extent of pollution that has occurred in the local water
courses. Leachate Pollution Index (LPI) was also evaluated to examine the contamination potential of landfill site. The
results showed that, the leachate generated was at a methanogenic state, which is indicated by the alkaline pH range
(7.8-8.2) of the leachate sample. Lead concentration in the leachate samples was in the range of 0.32 mg/L to 0.43 mg/L
in pre-monsoon season and 0.14 mg/L to 0.25 mg/L in post-monsoon season. Mercury concentration in the leachate
samples were in the range of 0.21 mg/L to 1.09 mg/L in pre-monsoon season and 0.07 mg/L to 0.38 mg/L in postmonsoon season. The LPI values of leachate sample calculated for pre-monsoon and post-monsoon seasons for
dumping ground were 28.903 and 18.09 respectively, well above the permissible limit. Higher LPI values of leachate
samples indicate greater pollution potential. The study necessitates scientific disposal methodologies for the municipal
solid waste of the city, Kolkata.

Published

2015-04-25

How to Cite

Sanjib Kumar Maiti, Sushmita De, Tumpa Hazra, Anupam Debsarkar, & Amit Dutta. (2015). Assessment of Seasonal Variation of Landfill Leachate Quality and its Pollution Potential - A Dhapa MSW Landfill Site, Kolkata Case Study. International Journal of Advance Engineering and Research Development (IJAERD), 2(4), 570–579. Retrieved from https://ijaerd.com/index.php/IJAERD/article/view/710