Major Ions for Tracing Leachate Migration within Shallow Groundwater in the Vicinity of Municipal Landfill in Bantar Gebang - Bekasi

Abstract

Bantar Gebang landfill located in Bekasi regency is a biggest sanitary landfill in Indonesia which comes up some refusals from local people because of its bad impact on their environment. Major ion contents in leachate and fresh groundwater were investigated during the rainy and dry season to determine contamination by leachate released from Bantar Gebang and Sumur Batu landfill. Leachate contained high concentrations of all major ions that was mainly characterized as a NaKHCO3 water type. On the other hand, most fresh groundwater samples were predominated by CaMgHCO3 and CaMgCl water type. Concentrations of K+, Ca2+, Mg2+, Na+, SO42-, Cl-, HCO3- and NO3- in leachate were to be in a maximum factor of 2110; 7; 6; 143; 20; 112; 349 and 20, respectively than its contents in groundwater. Leachate from Bantar Gebang was detected have a higher concentration than those contained in Sumur Batu that was probably due to its mature leachate. An estimated mixture of leachate to fresh water in monitoring wells (5 m and 15 m depth) was in the range of 20 to 34%, related to Na+ and Cl- signatures, while the shallow groundwater located in residents in the vicinity of these landfills exhibited maximum leachate about 2%.

The Potential of Landfill Mining in Two Inactive Zones of the Bantar Gebang Landfill in Jakarta, Indonesia

“…Bantar Gebang poses many environmental problems besides landslides; for example, in September 2015, a fire consumed around four hectares due to hot weather and methane gas leakage from the MSW (Antara News, 2015). A study in 2019 found the groundwater in the vicinity of the Bantar Gebang landfill to be contaminated by 2% leachate (Indiyati et al, 2019).…”

“…Among the criteria are that: (1) the landfill has an impact on the environment; (2) the government cannot find other appropriate areas for landfills; and (3) the landfill handles non-hazardous waste (Indonesia Ministry of Public Works, 2013). The Bantar Gebang landfill certainly met some criteria, as indicated by its groundwater pollution, and the Jakarta Government has not found other areas for landfills yet (Indiyati et al, 2019). Furthermore, the regulation mentions that the soil-like material from landfill mining can be utilized in daily landfill cover, biofilters for leachate treatment, and compost for non-edible crops.…”

Complexity of Waste Handling Technology at Final Disposal Site of Bantargebang, Bekasi City

“…The operation of the final disposal has had an impact on the environment around the Bantargebang final disposal [6]. The Bantargebang final disposal waste pile if simulated with the current situation will reach 36, 861, 653 tons in 2030.…”

Groundwater Recharge Area Based on Hydrochemical and Environmental Isotopes Analysis in the South Bandung Volcanic Area

“…One of the methods used to validate hydrogeological conditions is an environmental isotope and hydrochemical analysis [1][2]4,[7][8][9]. Isotope composition in hydrological systems in nature are influenced by physical variables, namely air temperature, air pressure, humidity, geographical location, and altitude [10].…”