Plastics are a low-cost product, highly versatile, and have good properties in our daily lives. Production has continuously increased worldwide, reaching ~ 391 Mt. in 2021. The consumption growth generates 400 Mt. of plastic waste annually, among them microplastics (MPs; < 5 mm), the most prevalent type of marine debris in oceans and lagoons. Microplastics are considered a pollutant that can take hundreds or thousands of years to decompose, posing a hazard to the environment and animal/human health. This environmental pollution originates from direct littering, but MPs are also transported by storms, water runoff, and winds. Different techniques are being used to quantify MPs in different types of sediments. In this study, MPs extraction was performed by density technique to extract different types of MPs, e.g., polyvinyl chloride (PVC; ρ = 1.45 g/cm3), polypropylene (PP; ρ = 1.05 g/cm3), with two solutions, i.e., sodium chloride (NaCl; ρ = 1.20 g/cm3), zinc chloride (ZnCl2; ρ = 1.70 g/cm3). Previously, biogenic material present in sediments was previously separated with ethanol (C₂H₆O; ρ = 0.80 g/cm3), where most MPs were deposited on the bottom while biogenic materials floated on the solution. Also, before MPs extraction, organic matter digestion was performed with hydrogen peroxide (H2O2 30%) and Fe (II) solutions. After separation, MPs were characterized using different techniques, depending on their size and characteristics, using an optical microscope, Raman, and SEM-EDS. Most of the MPs particles found were of PVC, PUR and PET, with filament shapes.