# Ion Exchange MIEX(r) GOLD Resin as a Promising Sorbent for the Removal of PFAS Compounds  
[PERSON]  
1 Department of Chemistry and Biotechnology, Swinburne University of Technology, Melbourne 3166, Australia 1, [PERSON]  
1 Department of Chemistry and Biotechnology, Swinburne University of Technology, Melbourne 3166, Australia 1, [PERSON]  
1 Department of Chemistry and Biotechnology, Swinburne University of Technology, Melbourne 3166, Australia 1, [PERSON]  
1 Department of Chemistry and Biotechnology, Swinburne University of Technology, Melbourne 3166, Australia 1, [PERSON]  
2 LOM Operations Pry Ltd., Melbourne 3002, Australia 2, [PERSON]  
2 LOM Operations Pry Ltd., Melbourne 3002, Australia 2,  
[PERSON]  
1 Department of Chemistry and Biotechnology, Swinburne University of Technology, Melbourne 3166, Australia 1,  
is revealed by data of their huge production in the United States since 1949, followed by worldwide production that is estimated to be in the tens of thousands of metric tonnes [5]. PFAS compounds contain a unique molecular structure that imparts excellent amphiphilic and physiochemical properties. The perfluoroxyl moiety of the molecule confers hydro- and oleo-phobicity and thermal stability, and there is shielding of the carbon backbone from physical and chemical attacks due to the strong bonding of electronegative fluorine atoms, whereas the attached hydrophilic head group (a carboxyl or sulfonic group) imparts water solubility [1; 6; 7]. Such suitable physiochemical properties, chemical inertness, and resistance to degradation of PFAS compounds have caused their abundant global application leading to their global detection in widespread environment matrices such as aquatic, air, soil, wildlife, food, house dust, drinking water, groundwater, etc. [2; 3; 4; 8; 9; 10]. Many of these synthetic chemicals can bioaccumulate in the food chain, can bind to blood lipoprotein, display proven toxicity in animal studies, and can cause potential harm to human health [2; 11; 12; 13]. PFOS can accumulate in higher concentrations in different organs reporting high in liver (liver \(>\) muscle \(>\) kidney), whereas the opposite trend is identified for PFOA (muscle \(>\) kidney \(>\) liver) [12]. The environmental persistency, bioaccumulation, and potential health hazard aspects of PFASs have roused global attention and identified these substances as notorious environmental pollutants. Perfluorooctane sulfonic acid (PFOS) was included in the Stockholm Convention's Annex B as a global Persistent Organic Pollutant in 2009 because of its binding capability to plasma proteins and sequestration into the liver, kidney, and lungs [11; 13]. Due to the potential toxic effects and public attention, the major US manufacturer 3M started phasing out and ceasing production of PFASs between 2000 and 2002, after 50 years of production [14]. In the years between 2000 and 2017, many countries including Australia, the USA, the UK, Canada, the Netherlands, Germany, Norway, and Sweden announced regulations and/or guidelines for the purpose of phasing out and limiting the use of PFAS compounds [15]. These studies have highlighted the necessity of the remediation of PFAS-contaminated sources such as groundwater, wastewater, soil, etc. One of the most popular and effective remediation strategies for PFAS is sorption. A wide range of adsorbents has been studied and some of the effective adsorbents include \(\beta\)-cyclodextrintrim polymer, activated carbon, fluorinated clays, anion-exchange resin, modified biomass, etc. [1]. Some of the commercial ion-exchange resins studied in PFAS removal include IRA67, IRA910, Amb IRA400, PFA300, PFA400, PFA444, A520E, A600E, A800p, A860, and A532E [1; 7; 16]. Scientific research shows various ion exchange resins (HPR4700, S6368, and A111S) as of high interest in PFAS removal by adsorption techniques [17]. There have also been a few reports on using magnetic ion exchange (MIEX) resin that was produced by Orica Watercare and IXOM Australia (MIEX(r) DOC resin) [18; 19; 20].