Polyvinylidene fluoride (PVDF) membrane is frequently employed for filtration due to its excellent properties. The hydrophobicity of PVDF membrane causes easy fouling; therefore, hydrophilic polymer materials are required to increase hydrophilicity. This study applies cellulose and cellulose esters as fillers for PVDF membranes to solve the fouling problem. Cellulose esters, such as cellulose acetate (PSCA), cellulose benzoate (PSCB), and cellulose citrate (PSCC), were successfully synthesized from peanut shell cellulose (PSC) using Fischer and non-Fischer reactions. The phase inversion method was successfully used to fabricate PVDF membranes with cellulose or cellulose esters as fillers. The fabricated membranes have been applied for methylene blue (MB) filtration. Adding PSC fillers improved the hydrophilicity and performance of the PVDF membranes up to 23.49 ± 2.40 L m−2 h−1 for water flux and 95.75 ± 0.78 % for rejection of MB. Regarding cellulose esters, cellulose acetate gave the highest value of 77.63 L m−2 h−1 for water flux, and cellulose citrate gave the highest value of 86.88 ± 3.54 % for MB rejection. Hence, cellulose or cellulose esters from peanut shells are suitable fillers for MB filtration in PVDF membranes.
This review aims to explore recent advancements in polymer-grafted materials that have emerged as effective adsorbents for the removal of contaminants from wastewater. The most significant environmental issues affecting public health are the presence of dyes, heavy metals, and metalloids in wastewater discharged by various industries. Unfortunately, traditional techniques for treating wastewater are incapable of removing dyes and heavy metals. Due to enhanced capabilities, larger surface areas, greater stability, adjustable properties, and cost-effectiveness, polymer-grafted nanomaterials (PGNs) have attracted the attention of researchers for water purification. Surface engineering of materials with the use of polymers improves greatly their colloidal stability and pollutant adsorption capacity. This study investigates different parameters such as adsorption capacity, pH, and duration in recently reported papers where polymer-grafted adsorbents are developed. The review concludes by offering an overview of recent advancements in the field and proposing potential avenues for future research on related topics.

