Dyah Ratri Widyati, NIM011411131150 (2017) Kandungan Logam Berat dalam Air dan Ikan pada Aliran Sungai Brantas di Surabaya. Skripsi thesis, Universitas Airlangga.

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Abstract

Introduction: A number of aquatic environment are now polluted by heavy metals, including the Brantas River. Heavy metals may undergo bioaccumulation and also biomagnification after entering the aquatic environment and its organisms, such as fish. Heavy metals that accumulate in fish have the potential to be transferred into the human body who consume it. Heavy metals such as cadmium and lead do not have any essential benefit for the body and may pose a danger to the human’s health. This study aimed to observe the cadmium and lead level in the water and fish tissues that were collected from Brantas River in the region of Surabaya, and to check whether the cadmium and lead level is still below the acceptable maximum level according to SNI 2009 and Peraturan Pemerintah No.82 th.2001. Methods: Water and fish tissue samples were taken in a purposive-sampling manner on 23-26 January 2017. Samples were collected from 6 stations along the main branches of Brantas River in the region of Surabaya. 250 grams of fish and 1.5 litres of water from each station were brought to the laboratory (Balai Besar Laboratorium Kesehatan Surabaya) for further examiation through atomic absorption spectroscopy (AAS). Results: The cadmium level of the water samples were all 0,000 ppm. The average lead level of the water samples was 0,031 ppm, with 2 stations (station 4 and station 6) that had lead level above the maximum acceptable level. The average cadmium level of fish samples was 0,023 ppm. The average lead level of fish samples was 0,009 ppm. Cadmium and lead level in fishes were all below the maximum acceptable level. Conclusion: The cadmium level and lead level of the water of Brantas River in the region of Surabaya were below the acceptable maximum level, except for the lead level of water at station 4 and 6 of our research. In another hand, the cadmium level and lead level in fish tissues from Brantas River in the region of Surabaya were all below the acceptable maximum level. This result indicated that the river has been polluted, however the fishes were still safe to be consumed.

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