Composite functional adsorbents for oil-contaminated wastewater treatment: comparative performance of Carbon-Nanoparticle and MOF-Polymer composites

The performance of composite functional adsorbents in the elimination of oil contaminants in the wastewater is studied. Batch adsorption were performed by application of a wide range of conditions, including pH, temperatures, and adsorbent doses in the case of Carbon-Nanoparticle Composites and MOF-Polymer Composites. The findings indicated that Carbon-Nanoparticle Composite had the highest adsorption capacity of 160.5 mg/g whereas MOF-Polymer Composite had maximum adsorption ability of 145.2 mg/g at oil concentration of 100 ppm. It was concluded that the range of pH giving the best results in terms of removing oil was 4-7 whereas the best result in terms of the adsorption efficiency was 60 °C as the MOF Polymer Composite revealed the highest efficiency in removing oil at 92.1 per cent. The study of the dosage of adsorbents showed that both composites worked with an efficiency close to 100% at a dosage of 5 g, among which the sensitivity of lower doses was observed. Moreover, the composites performed well in terms of reuse with an advantage of MOF-Polymer Composite retain 90-percent effectiveness after an adsorption and desorption procedure of three cycles. These results represent the scope of composite adsorbents in the treatment of oil-bearing wastewaters, with superior performance provided than other currently used materials such as activated carbon. Additional optimization of these adsorbents to industrial use is proposed in the study by means of enhancing a functioning of the adsorbents, including optimization of their regeneration and cost-effectiveness.