Study of soil contamination at mangrove Island: Case study of Carey Island

This paper reviews on the soil condition for three rivers at Carey Island namely Air Hitam, Judah and Keluang River. The activities on the island such as palm oil industries are believed affect the soil. Thus a study was carried out to determine the parameters of pH value, total sulphates, chloride content, total organic carbon (TOC), inorganic carbon (IC) and nitrogen in soil. The tests that have been conducted are Moisture Content Test, Specific Gravity Test, Atterberg Limit Test, pH Test, Total Sulphates Test and Total Chloride Content Test. The soil for Keluang River and Air Hitam River are classified as SILT of high plasticity and soil at Judah River is classified as SILT of intermediate plasticity. The average pH values for the three rivers show that it still in safe mode from pollution. For the chloride content test, the results show in range 12 to 19. While, the average sulphates content are 84.6 ppm at Keluang River, 66.4 ppm at Judah River and 97.3 ppm at Air Hitam River. It shows that the level of contaminant is considered as low for the three rivers.