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Microplastic pollution in the water and sediment of Krukut River, Jakarta, Indonesia
Summary
Researchers collected water and sediment samples from upstream, middle, and downstream sites in the Krukut River in Jakarta, Indonesia, and used density separation and microscopy to quantify microplastics. They found that microplastic abundance increased downstream, with fibers dominating in water and pellets in sediment, and downstream concentrations reaching 265 particles per 100 mL in water and 150 particles per kg dry weight in sediment.
Abstract One of Jakarta’s drinking water sources, the Krukut River, has been contaminated by a variety of industrial and domestic wastes, including microplastic pollution. To investigate the abundance and identify the of microplastics in the Krukut River, water and sediment from 3 sites, upstream, middle and downstream were collected using a water sampler and Ekman sediment grab sampler, respectively. The microplastic from water and sediment was extracted using density separation method. The microplastics were counted and categorized according to the shape under a microscope. The differences in microplastic abundance in three different sites were determined using a one-way ANOVA. The result shows fiber dominated microplastic shape in the water across the sampling sites, whereas pellet dominated microplastic shape in the sediment from upstream to middle-stream. The downstream water has the highest abundance of microplastics (265 ± 5.0 particle/100 mL), which is significantly different (p<0.05) from the middle (221 ± 3.0 particle/100 mL) and the upstream (215 ± 1.5 particle/100 mL). Similarly, the downstream sediment had the largest abundance of microplastics (150 ± 5.0 particle/kg dry weight), which was significantly different (p<0.05) from the middle (125 ± 6.0 particle/kg dry weight) and the upstream (112 ± 3.5 particle/kg dry weight).