Preliminary Study of Microplastic Abundance in Rivers of Greater Semarang Area, Indonesia.

Microplastics are concerning pollutants with increasing global presence. Yet, data on their occurrence in Indonesian rivers, especially in Semarang, is limited. This study aimed to assess microplastic abundance and characteristics in Greater Semarang's Babon and East Flood Canal (Kanal Banjir Timur, KBT) rivers at five stations. Sampling and analysis followed Japanese Guidelines of Riverine Microplastic Survey. Spearman's correlation analyzed the link between microplastic abundance and population served by waste services. Microplastics were found in all stations, with the highest levels downstream, likely due to accumulation along the flow. Abundance varied from 1.1-9.6 particles/m³. No significant correlation between microplastic abundance and population was found. The most prevalent microplastic form was sheet (14-75%), primarily sized 0.5-1 mm and black (1-60%). The main identified polymer type was polyethylene in sheet form, possibly originating from single-use plastic bags. These findings underscore the urgency of preventing waste leakage into rivers to reduce microplastic release into the environment. By addressing the issue of single-use plastics in hard-to-reach areas and improving waste management practices, we can work towards mitigating the impact of microplastics on the environment. [ABSTRACT FROM AUTHOR]