Isotope Technique (14C, 131I) for Safety Analysis of Domestic Solid Waste Disposal Site in Jakarta, Indonesia- A Case Study

Abstract

Bekasi is one of city around Jakarta which has been developed for the last 10 years. In the south of Bekasi placed sanitary landfill area for domestic solid waste of Jakarta Metropolitan as a Disposal Site. The objective of the present study is to evaluate the location of Bantar Gebang Bekasi solid waste disposal site for safety analysis. The geohydrologycal parameters are determined by using isotopes techniques (14C, 131I) to study the shallow groundwater characteristics of the site. From the results of 14C the direction of groundwater movement is found to be from South to the North and turned to North West of Jakarta at Jakarta Center. From radiotracer method (131I) the direction of shallow groundwater in the rainy is observed to be from the disposal site to the surrounding area and the Ciketing canal which flows to the North. For the dry season from the disposal site to the surrounding area. The results from environmental isotopes and hydrochemistry analysis indicate that the pollutants from the site have given an impact to the surrounding area of disposal site which was shown by migration of nitrate. It is recommended that the decision maker should give high priority to the geology, geohydrology and environmental pollution studies for consideration of disposal site for the safety of sanitary landfill.