Analisis Konsentrasi Logam Kromium, Kadmium, dan Nikel dari Total Dissolved Solid Road Dust Suspension-Resuspension di Area Bawah Flyover Amplas

Abstract

This study aims to determine the concentration of Chromium, Cadmium, and Nickel metals from Total Dissolved Solid Road Dust Suspension-Resuspension in the area under Amplas Flyover. The study was conducted by taking road dust samples using a portable vacuum and the road dust sieving process was carried out using a 200 mesh sieve. Total Dissolved Solid Road Dust Suspension-Resuspension was obtained from the results of ovening road dust filtrate and rainwater mixed from 20 g of road dust and 80 mL of rainwater. Mixing road dust with rainwater to simulate the condition of road dust exposed to rainwater runoff. The Total Dissolved Solid was destroyed using the wet destruction method and analyzed using the Inductively Coupled Plasma - Optical Emission Spectrometry (ICP-OES) instrument with λspecific metals Chromium, Cadmium and Nickel respectively 267.72 nm; 226.50 nm; and 231.60 nm. The results of the analysis of the concentration of Chromium, Cadmium, and Nickel metals were 0.1760 mg/L, 0.0168 mg/L, and 0.00016 mg/L, respectively. The concentration of metals in the Total Dissolved Solid Road Dust Suspension-Resuspension has a low value influenced by the size of fine dust particles, the composition of road dust, the influence of climate, environmental pH, and contact time so that it is easily dissolved and mobilized which results in the formation of complexes and precipitation. This study has important information related to environmental pollution caused by road dust on urban roads exposed to rainwater runoff.