A series of sulfhydryl compounds (L= AB9, MB9, EB9) was synthesized with the concern of discovering reagents with excellent accessibility, long term stability, and to bind targeted heavy metals (M= Cd, Hg, Pb, As). These ligands derivative from B9= 1,3-benzenediamidoethanethiol (Figure 1a); a compound irreversibly precipitates heavy metals (Figure 1b). New sulfhydryl compounds provide different inductive effects towards the thiol (SH), and multiple, concerted, bonding sites used in sequestration of heavy metal contaminants through strong S-M covalent bonds formation. Promising advantages of these L-M compounds include their colorlessness, odorless nature, complete metal removal via immediate precipitation formation, and leaching resistivity over a wide pH range. Furthermore, thiol coupled magnetic nanoparticles (MNPs) were used in the removal of arsenite from water. The MNPs coated with the amine-functionalized silica surface, coupled to AB9= 2,2’-(isophthaloybis(azanaediyl))bis-3-mercaptopropanoic acid; (sulfhydryl compound with pendant carboxylate groups) used as the composite, Fe3O4-SiO2-linker-AB9 (AB-MNP). Complete arsenic removal was achieved with As(III) solutions of 200, 500, and 1000 ppb resulting in detectable arsenic dropped to below 10 ppb. This single solid-composite immobilize As(III) by forming strong covalent As-S bonds producing “proposed” structure As(III)-AB9@MNP (Figure 2). The components of this new composite material are made from non-toxic, earth-abundant elements, and rapid magnetic separation allows them to be used as an effective, affordable means of providing arsenic-free drinking water to at-risk populations around the world.

Synthetic dithiols and superparamagnetic nanoparticles: Purification of contaminated heavy metal water

Macromolecular Chemistry: The Second Century

[Author Benefits](https://scimeetings.acs.org/?utm_source=pubs_content_marketing&utm_medium=website&utm_campaign=0320_MCF_NPI_Launch_Spring_Homepage&ref=pubs_content_marketing)

[How to use SciMeetings](https://storage.googleapis.com/dl.morressier.com/acs/SciMeetings-ACSSpring2020-HowToGuide_M3020-Final.pdf)

[Frequently Asked Questions](https://storage.googleapis.com/dl.morressier.com/acs/SciMtng_ACSNMSp2020_FAQ_M3120_Final.pdf)

ACS Spring 2020 National Meeting & Expo

The official archive and repository for all ACS Meetings & Expositions abstracts and select posters or presentations.