Analisis Konsentrasi Logam Tembaga, Arsenik, dan Seng dalam Total Suspended Solid dari Road Dust Suspension–Resuspension di Kecamatan Medan Marelan

Abstract

The development of transportation will result in exhaust gas or road dust which is very dangerous for public health and also the environment. This study was conducted to identify the concentration of metals in Total Suspended Solid from Road Dust Suspension-Resuspension (RDS-R) in Medan Marelan District. Analysis of metal concentrations focused on Copper, Arsenic, and Zinc metals. Road dust samples were collected using a portable vacuum with three location points then sieved with a 200 mesh sieve, the sieved road dust samples were dissolved with rainwater to simulate the natural environment of urban runoff and analyzed using Inductively Coupled Plasma - Optical Emission Spectrometry (ICP-OES) to determine the concentration of heavy metals in the sample. Analysis of metal concentrations using ICP-OES requires a destruction process, namely wet destruction using strong acids such as HNO3 and H2O2. So that the concentrations of copper, arsenic, and zinc metals are sequentially 92 mg/kg; 3 mg/kg; and 287 mg/kg. Then the results of the validity test using ICP-OES obtained a recovery test of 99.5% - 100.1% while the precision test expressed in %RPD obtained 0%. The linearity obtained by the ICP-OES analysis method was 0.9999 for Cu, 0.9998 for As, and 0.9987 for Zn with LoD for Cu 0.00104 mg/L, As 0.0133 mg/L, and Zn 0.01212 mg/L, and LoQ for Cu, As, and Zn respectively 0.00347 mg/L, 0.0444 mg/L, and 0.04042 mg/L. This study is expected to provide scientific information regarding the content of heavy metals in TSS from RDS-R which can pollute water bodies and have an impact on human health and the environment around Medan Marelan District.