Analisis Kandungan Logam Berat Kromium (Cr) pada Bivalvia (Marcia sp.) di Kawasan Perairan Pulau Serangan, Kota Denpasar

Abstract

Bivalves are one of the organisms in the mollusk group that live on the bottom of the waters and act as bioindicators of environmental pollution, especially heavy metals. The purpose of this study was to determine the concentration of heavy metal chromium (Cr) in Bivalves of the genus Marcia sp. and the level of pollution in the waters of Serangan Island, Denpasar City. The study was carried out in April – May 2025. Bivalve samples were taken from community catches, consisting of the two most abundant species with the genus Marcia sp. from each sampling point. Chromium (Cr) content analysis was carried out at the Udayana University Analytical Laboratory using the Spectrometry method by a tool in the form of ICP-AES (Inductively Coupled Plasma Atomic Emission Spectrometry). Based on the study, 9 species from 4 families were identified. The families found include Veneridae, Arcidae, Cardiidae, and Semelidae. The species Marcia hiantina and Marcia opima are the two most abundant Marcia sp. species at each point. The results of the chromium (Cr) content test showed that all bivalve samples contained the heavy metal chromium with a concentration range of 0.0094–0.4986 mg/kg, where the highest concentration was found in the Marcia opima species. The chromium (Cr) concentration values in all Bivalvia (Marcia sp.) samples were within the safe consumption limit set by the 2007 Hong Kong Food Adulteration (Metallic Contamination) quality standards