Distribution and Metal Adsorption of Lead (Pb) in Estuary Banyuasin, South Sumatra

Banyuasin River estuary is an important area for the people of South Sumatra. The high activity that occurs in this estuary resulted susceptible of pollution, especially Pb, both on water and aquatic organism. This research aims to analyze the content of heavy metals Pb and predict the occurrence of adsorption of Pb in the water column and sediments around the sides and the estuary Banyuasin using modeling approaches. This study used three stations representing three regions of the estuary, which was the outer estuary, the middle estuary, and the inside of the estuary, where at each station were taken three samples of water (surface water, water column and bottom waters) and one sediment sample. Pb in water and sediment samples were analyzed using AAS method. The data is visualized in the form of a map of the distribution of the spread used ODV software, while the adsorption of Pb on the waters modeled using partition models, Freundlich models and Langmuir models. The results showed that Pb in the estuary Banyuasin as accumulation of human activities on the river upstream with the concentration has exceeded the threshold set by the Minister of the Environment. Pb concentration was higher in the sediments indicated that indeed happened Pb adsorption by sediment. Modeling results indicated that the adsorption process of Pb was held in accordance with the Langmuir assuming fisiosorption domination.