الفهرس 
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Abstract
Plastics are artificial organic polymers that have only been around
for a little over a century. They are widely used by society because of
their numerous advantages. They are preferred in all industrial
applications because of their small size, low price, and high durability.
The plastic production values between 600 to 800 Billion Dollars, which
shows the difficulty to interfere by change or recycling.
After being dumped into the environment, plastic trash would
break down into tiny plastic particles, eventually creating microplastics
(MPs) with a particle size of less than 5 mm. It is widely acknowledged
that MPs fall into two categories: primary MPs and secondary MPs.
Primary microplastics are defined as microplastics that are originally
manufactured to be less than 5mm in size and are commonly found in
textiles, medicines, and personal care products such as facial and body
scrubs. These primary microplastics can be transferred into freshwater
and marine habitats via rivers, discharge from water treatment plants,
wind, and surface run-off. Secondary MPs are produced as a result of
continuous abrasion and weathering of plastic products. Among the
sources of secondary microplastics are household items, industrial resin
pellets, fishing nets, and other discarded plastic waste.
Egypt is the biggest user of polymers in Africa, consuming around
2.1 million tons of them in 2017.
Fish is a good source of high-quality protein and an important
source of micronutrients such as vitamins, minerals, and polyunsaturated
omega-3 fatty acids so, two commercially important fish species (Nile
tilapia and African catfish) were chosen for microplastic detection.