Positively Charged Polysulfone and Polyether Sulfone Mixed Matrix Membranes Modified with Polyethylenimine: Enhancing Heavy Metal Rejection and Antifouling Properties

Mistry, Priyanka; Murthy, C. N.

doi:10.1021/acsestwater.3c00585

Cited by 1 publication

(1 citation statement)

References 52 publications

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“…For the separation of heavy metals, ultra ltration membranes are usually employed for treating heavy metals and synthetic organic pollutants. So far, various types of ultra ltration membranes have been developed with mostly polymeric materials such as polysulfone (PSF), polyether sulfone (PES), cellulose acetate (CA), polyacrylonitrile (PAN), polyurethane (PU), and polyvinylidene uoride (PVDF) [12][13][14][15]. These polymeric membranes can be fabricated using various techniques, with phase inversion and electrospinning the most common ones [16].…”

Section: Introductionmentioning

confidence: 99%

Heavy metals rejection from water by CMC complexation- PVDF ultrafiltration system: Box-Behnken design optimization

Al-Mutair,

Kumar,

Al-Mur

et al. 2024

Preprint

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In this study, the rejection of three heavy metals (Pb, Zn, and Fe) was optimized using a polyvinylidene fluoride (PVDF) ultrafiltration membrane system combined with carboxymethyl cellulose (CMC) as a complexing agent. The fabricated PVDF membrane was characterized before and after filtration by FTIR, XRD, SEM, and EDX to ascertain the physicochemical properties. The PVDF ultrafiltration system integrated with CMC complexation was modeled and evaluated for the removal of Pb, Zn, and Fe metal ions using the response surface methodology (RSM)- Box-Behnken design (BBD). The RSM- BBD design was applied to determine the influence of three independent experimental parameters, i.e., pH, metal ions concentration, and CMC dosage. The proposed RSM model better described the experimental results with high R2 values (> 0.90) for all three metal ions. The optimized process parameters obtained by RSM showed that the maximum rejection % of Pb (101.28), Zn (89.74), and Fe (99.05) was achieved at solution pH of 7.64, 6.72, and 4.23, with initial metal concentrations 27.62, 20.46, and 133.15 mg/L, and CMC dosage 1.99, 0.14, and 0.46 g/L, respectively. The PVDF-membrane integrated CMC ultrafiltration system demonstrated good reusability with a reduction of only 5, 40, and 31 % for Pb, Zn, and Fe, respectively, after three consecutive cycles. The results indicated that integration of CMC complexation with PVDF ultrafiltration system is a promising approach for enhanced rejection of heavy metals from water.

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Section: Introductionmentioning

confidence: 99%