Pre-irradiation grafting of acrylic acid and sodium styrene sulfonate on non-woven polyethylene fabric for heavy metal removal

Abstract

In present study acrylic acid (AAc) and sodium styrene sulfonate (SSS) were grafted onto non-woven polyethylene fabric using pre-irradiation method and the grafted adsorbent is employed for Cr(III) and Pb(II) adsorption. After irradiation of the non-woven polyethylene fabrics with 50 kGy radiation dose the grafting reaction was carried out at 80º C with monomer solution consisted of 30% AAc, 10% SSS and 4% NaCl in water. A high graft yield of 270% was achieved. Fourier Transform Infrared, Scanning Electron Microscopy and Thermo-gravimetric Analysis were used to analyze the adsorbent. Pb (II) and Cr (III) adsorption from synthetic aqueous solution was attempted by the grafted adsorbent. Adsorption study was accomplished by changing the contact time, pH and initial metal ion concentration. Contact time 48 h and initial metal concentration 1000 ppm were found optimum for all the metal ions studied. pH 6.2 and 5 was observed best for Pb (II) and Cr(III) adsorption respectively. Kinetic adsorption data fitted better with pseudo-second-order equation than pseudo-first-order. Good correlation of experimental data with Langmuir isotherm model suggested monolayer adsorption. Langmuir equation showed that the maximum adsorption capacity for Pb (II) was 38.46 mg g -1 and Cr (III) was 111.11 mg g -1 . Experiment on desorption of metal ions and reuse of the adsorbent depicted good results. Adsorbent also showed efficient adsorption of Cr(III) from real waste water. From all the findings it can be expected that the AAc-SSS grafted PE fabric can successfully eliminate Cr(III) and Pb(II) from industrial waste water.

Adsorption of Cu (II) ions from aquatic environment using pre-irradiated Ethylene Tetrafluoroethylene Film

“…As the adsorption follows the PSO model the adsorption process might have been controlled by the intraparticle diffusion (IPD) [30] . To get more extent of adsorption, the IPD plays an important role and it can be expressed as Equation ( 8):…”

Synthesis and Evaluation of Highly Inhibitory Oil Well Cement Retarders with Branched-Chain Structures

“…In this article, the molecular structure of polymer-based retarders and the abnormal gelation phenomenon were adequately investigated. All these work were conducted by combining the recent tendency in materials science, chemistry, and polymer synthesis technology. − A highly inhibitory medium-high temperature cement retarder with a branched chain structure was synthesized and named DRH-150. First, the 2-acrylamido-2-methylpropanesulfonic acid-acrylic acid chain was prepared by free radical polymerization under experimental conditions at 50 °C.…”

Preparation of a Novel Proton Exchange Membrane Using Radiation Grafted ETFE Film for Fuel Cell

“…An appealing method for the synthesis of PEM is radiation-induced graft polymerization, which enables the grafting of a monomer with a desired functional group or the grafting of the chains of a precursor-monomer followed by polymer-analogous transformations. Benefits of the radiation-induced graft polymerization method include its low cost, ability to penetrate deeply into the primary polymer matrix, less need for chemical initiators or catalysts, simple control over the degree of grafting and ion exchange capacity, and ease of fabrication from an existing base film [6][7]. In this investigation, sodium styrene sulfonate (SSS) and acrylic acid (AA) were employed as monomers, with NaCl acting as an additive to ETFE, followed by a preirradiation technique with gamma ray.…”