الفهرس 
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Abstract
Oil contaminated wastewater is one of serious pollutants that
may affect the quality of life for humans and other creatures due its
improper ways of disposal. This research work reports new approach
during the synthesis of developed polymer-based structures for use in
purification of a wastewater samples from petroleum oil via adsorption.
Specifically, different grades of polystyrene that were prepared by high
internal polymerization technique are presented in this study. The impact
of preparation parameters; namely dosing and mixing times, on the
efficiency of such polymer grades toward oil removal from the
wastewater was investigated. It was detected that the obtained polymer at
dosing and mixing times of 20 and 120 min respectively had attained the
highest oil removal percentage. Numerically, this polystyrene structure
was capable to remove nearly 92 % of existing oil in the introduced
wastewater sample. The formerly reported preparation conditions were
also utilized to subsequently prepare three core-shell structures. The core
of these composites was made of different percentages of freshly
synthesized nanoparticles of silica (Sonication of nano silica on aqueous
phase) which were then shelled by polystyrene. The composite which
contained a silica percentage of 5 % could efficiently remove about 88.67
% of the emulsified oil in the wastewater sample. The attained oil
removal by either the blank polymer or its corresponding composite was performed at room temperature and lasted for an operating time of 30
min.