Surface modification of polypropylene membrane for the removal of iodine using polydopamine chemistry

Changani, Zinat; Razmjou, Amir; Taheri‐Kafrani, Asghar; Warkiani, Majid Ebrahimi; Asadnia, Mohsen

doi:10.1016/j.chemosphere.2020.126079

Cited by 54 publications

(21 citation statements)

References 73 publications

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“…There are several methods for modifying the surface of NF membranes to achieve membrane fouling removal [ 29 ]. The methods available are UV photografting [ 30 ], plasma-assisted grafting [ 31 ], redox-initiated grafted polymerisation of acrylic acid [ 32 ] and embedding nanoparticles coupled with graphene oxide [ 33 ].…”

Section: Nanofiltration Membranementioning

confidence: 99%

Rejection Mechanism of Ionic Solute Removal by Nanofiltration Membranes: An Overview

et al. 2022

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The toxicity of heavy metals can cause water pollution and has harmful effects on human health and the environment. Various methods are used to overcome this pressing issue and each method has its own advantages and disadvantages. Membrane filtration technology such as nanofiltration (NF) produces high quality water and has a very small footprint, which results in lower energy usage. Nanofiltration is a membrane-based separation technique based on the reverse osmosis separation process developed in the 1980s. NF membranes have a pore size of 1 nm and molecular weight cut off (MWCO) of 300 to 500 Da. The properties of NF membranes are unique since the surface charge of the membranes is dependent on the functional groups of the membrane. The rejection mechanism of NF membrane is unique as it is a combination of various rejection mechanisms such as steric hindrance, electric exclusion, dielectric effect, and hydration mechanism. However, these mechanisms have not been studied in-depth due to their complexity. There are also many factors contributing to the rejection of NF membrane. Many junior researchers would face difficulty in studying NF membrane. Therefore, this paper is designed for researchers new to the field, and will briefly review the rejection mechanisms of NF membrane by both sieving and non-sieving separation processes. This mini-review aims to provide new researchers with a general understanding of the concept of the separation process of charged membranes.

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Section: Nanofiltration Membranementioning

confidence: 99%

Rejection Mechanism of Ionic Solute Removal by Nanofiltration Membranes: An Overview

et al. 2022

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“…showing excellent adsorption capacity [20], Therefore, LDHs has become a promising anion adsorbent for the removal of anion pollutants in water due to its efficient anion exchange ability [21][22].…”

Section: Introductionmentioning

confidence: 99%

Fe(III) Complexed Polydopamine Modified Mg/Al Layered Double Hydroxide Enhances the Removal of Cr(VI) from Aqueous Solutions

et al. 2022

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Herein, we report the preparation of Fe(III) complexed polydopamine modified Mg/Al layered double hydroxides composite material (LDHs@PDA-Fe(III)) and its application to the removal of Cr(VI) in aqueous solution. LDHs@PDA-Fe(III) was characterized and analyzed by field-emission scanning electron microscopy-energy dispersive X-ray spectroscopy (SEM-EDS), Fourier transformed infrared (FTIR), X-ray diffraction (XRD), X-ray photoelectron (XPS). The adsorption performance was studied through a series of adsorption experiments. Under the influence of pH, time, temperature, concentration, the maximum adsorption capacity obtained in the experiment is 683.4 mg/g. In addition, after 5 adsorption cycles, LDHs@PDA-Fe(III) still shows excellent adsorption capacity and stability. Combining adsorption experiments and characterization analysis, it is inferred that the adsorption of Cr(VI)

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“…Therefore, it is of great significance to effectively control the migration of and contamination with radioactive iodine. The treatment of radioactive iodine includes ion exchange, [2] chemical precipitation, [3] membrane separation, [4] adsorption, [5] and other techniques. The capture of radioactive iodine by solid adsorbents has many advantages due to its simplicity, reliability, and low operating cost [6] .…”

Section: Introductionmentioning

confidence: 99%

Adsorption of Iodine on Adamantane‐Based Covalent Organic Frameworks

Wei

et al. 2021

ChemistrySelect

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Radioactive iodine is severely hazardous to human health and the environment because of its high specific activity and environmental mobility. In this article, three covalent organic frameworks (COFs) (named as DbTd‐COF, DpTd‐COF, and DaTd‐COF) were prepared for the removal of iodine in both gas and solution states. The COFs were obtained by the solvothermal reaction of 1,3,5,7‐tetrakis (4‐formylphenyl) adamantane (TFPA) with benzidine, 2,5‐diaminopyridine, and p‐phenylenediamine, respectively. The obtained samples were characterized by SEM, FT‐IR, TGA, and nitrogen adsorption‐desorption analysis. The rigid linker of phenzyl chains helps to improve the stability of the polymer. DbTd‐COF and DaTd‐COF show excellent thermomechanical stability with a decomposition temperature of over 400 °C. DbTd‐COF and DaTd‐COF show good uptake capacities of 4.93 and 4.48 g g−1 for iodine vapor capture, respectively. DpTd‐COF shows a slightly smaller iodine uptake of 3.43 g g−1. XPS results indicated that iodine was captured in the form of its polyiodide anions. A better recyclability can be obtained after four cycle runs. In addition, DaTd‐COF shows good removal of iodine (concentration: 500 mg L−1) from cyclohexane solution with an adsorption capacity of 666.79 mg g−1.

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Surface modification of polypropylene membrane for the removal of iodine using polydopamine chemistry

Cited by 54 publications

References 73 publications

Rejection Mechanism of Ionic Solute Removal by Nanofiltration Membranes: An Overview

Rejection Mechanism of Ionic Solute Removal by Nanofiltration Membranes: An Overview

Fe(III) Complexed Polydopamine Modified Mg/Al Layered Double Hydroxide Enhances the Removal of Cr(VI) from Aqueous Solutions

Adsorption of Iodine on Adamantane‐Based Covalent Organic Frameworks

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