Analisis Kandungan Logam Berat Timbal (Pb) pada Kerang Darah (Anadara Granosa) di Perairan Belawan Kelurahan Bagan Deli

Abstract

Heavy metal pollution in Belawan waters occurs due to human settlements, industrial activities, tourism, the use of antifouling paint used to coat ship hulls and anthropogenic activities. Lead pollution in these waters has the potential to disrupt the balance of the marine ecosystem, especially organisms that live in the sea, one of which is shellfish. This study aims to analyze the content of heavy metal lead (Pb) in blood clams (Anadara granosa) in Belawan waters, Bagan Deli Village. The type of research is descriptive survey research. The location of the study was carried out in Bagan Deli Village with a population of 4,904 families. The sample was determined as many as 98 people using the Slovin formula and the sampling technique through random sampling techniques. Data collection used questionnaires and laboratory tests. The results of the study showed that the majority of the population was aged 51-60 years (26,5%), with female gender 89,8%, high school education 39,8%, working as housewives 62,2%, length of residence 21-30 years (29,6%), body weight 61-70 kg (35,7%). The results of laboratory tests showed that the Pb content in Belawan waters in Bagan Deli Village, namely at point 1 of 0,028 mg/L and point 2 of 0,042 mg/L had exceeded the quality standard limit according to Government Regulation No. 22 of 2021, while the Pb content in blood cockles in the three samples had the same result of 0,059 mg/L which had not exceeded the quality standard limit according to the Indonesian National Standard-7387-2009. The results of the study showed that the frequency of blood cockle consumption was once a week in 68,4% and the amount of blood cockle consumption was 50 grams (39,8%). The calculation results show a minimum intake of 0,00001 mg/kg/week, a maximum intake of 0,00023 mg/kg/week, and an average intake of 0,000072 mg/kg/week. The public is advised to remain vigilant in consuming blood cockles and to maintain cleanliness, especially around residential areas, to reduce water pollution in the waters of Bagan Deli Village.