Relationship of Heavy Metal levels (Pb and Cd) on Leachate Jatibarang Waste and Water River end Disposal place raw materials Municipal Waterworks Semarang City

Abstract

Jatibarang Waste Disposal Site (abbreviated as landfill Jatibarang) is the final waste collection site in Semarang City, which is sourced from the fields of household, service, industrial, etc with various types of garbage, so that it can potentially cause pollution of the surrounding environment. One of them that might be affected is the River around landfill  Jatibarang. Pollution to river water can occur because of the process of decomposition of waste by rain water resulting in water leachate containing heavy metals such as lead (Pb) and cadmium (Cd). landfill  Jatibarang is in hilly and bumpy area which in the lowest part flow the Kreo River connected to the Kaligarang River, where the water contained in the river is the raw water of the Tirta Moedal Drinking Water Company  in Semarang City. This studyaimed to determine the relation of leachate to heavy metal (Pb and Cd) contamination of landfill  Jatibarang in raw material river water of Local water company in Semarang City. This study was an observational analytic study with cross sectional study design. Leachate sampling was carried out at leachate outlets, while river water samples were carried out at 29 points along the Kreo River to the Garang River. The results of the research with the AAS method provided the Pb level in leachate water was 0.15 mg/lt, while the Cd content was 0.040 mg/lt. The results of the Rank-Spearman relationship test provided the relationship between the distance of the water leachate outlet and the Pb level in Kreo River water flow (p = 0.007), but there was no correlation between the distance of the water leachate outlet and the Cd level in the Kreo River water flow (p = 0.304). Furthermore, the Mann-Whitney test revealed that there was no difference between the type of river flow and Pb and Cd levels of the Kreo River flow with a significance value = 0.100 for Pb levels and 0.160 for Cd levels.