M. Taufiq, 2016. Concentration Analysis of Some Heavy Metal on the Indicated Contaminated Paddy Field in Sawang, South Aceh District. A Master Thesis at the Graduate Program of Syiah Kuala University, under the Supervision of Muyassir and Teti Arabia.
ABSTRACT
Heavy metal in the soil will cause bioaccumulation in plants, and if consumed by humans they will eventually lead to bioaccumulation in humans. Such metal contamination makes the food unsafe for the human to consume. This study aims to determine the concentration of heavy metals, Hg, Cd and Pb in the paddy fields of Sawang in South Aceh District. There is an indication that the fields have lately been polluted by careless use of agrochemicals during gold mining and farming activities.  This study used grid method of soil survey known as rigid grid soil survey. The soil sampling scheme was systematically designed, taking into account the expected range of auto-correlation space. Observations distance was made regularly at a certain distance to produce rectangular grids across the survey area while the soil sampling was made in a regular pattern. The results indicated that the highest mercury (Hg) concentration was at 3.582 mg.kg-1 while the lowest was at 0,001 mg.kg-1 with an average of 0.329 mg.kg-1. 5 out of 41 soil units analyzed had the concentrations of Hg exceeded the TLV (Threshold Limit Value) allowed in paddy fields. This means that paddy field in the 5 units (13, 15, 16, 17 and 18) have been polluted with mercury. The range of Pb concentration in the soils was between 0.014 and 8.77 mg.kg-1 with an average of 3. mg.kg-1. This means that Pb concentration in all soil samples was far below TLV specified for paddy fields at 250 mg.kg-1. The results of laboratory tests did disclose any Cd concentration (undetectable) in the soil.

Keywords: Heavy metal, paddy field, gold mining.

Komentar

Postingan populer dari blog ini