Superabsorbents and Their Application for Heavy Metal Ion Removal in the Presence of EDDS

Dorota Kołodyńska; Alicja Drozd; Yongming Ju

doi:10.3390/polym13213688

Superabsorbents and Their Application for Heavy Metal Ion Removal in the Presence of EDDS

Polymers (Basel). 2021 Oct 26;13(21):3688. doi: 10.3390/polym13213688.

Authors

Dorota Kołodyńska¹, Alicja Drozd², Yongming Ju^{3

4}

Affiliations

¹ Department of Inorganic Chemistry, Institute of Chemical Sciences, Faculty of Chemistry, Maria Curie Skłodowska University, Maria Curie Skłodowska Sq. 2, 20-031 Lublin, Poland.
² Analytical Department, Łukasiewicz Research Network-New Chemical Syntheses Institute, Al. Tysiąclecia Państwa Polskiego 13a, 24-110 Puławy, Poland.
³ Nanjing Institute of Environmental Sciences, Ministry of Ecology and Environment (MEE), Nanjing 510655, China.
⁴ Innovative Laboratory for Environmental Functional Materials and Environmental Applications of Microwave Irradiation, South China Subcenter of State Environmental Dioxin Monitoring Center, South China Institute of Environmental Sciences, Ministry of Ecology and Environment (MEE), Guangzhou 510655, China.

Abstract

Three acrylic-based superabsorbents-TerraHydrogel^®Aqua (THA), Zeba^®Hydrogel (ZH) and Agro^®Hydrogel (AH) were used to investigate the influence of chemical conditions on kinetic and adsorption behavior towards metal ions in the presence of a chelating agent of a new generation called ethylenediamine-N,N'-disuccinic acid (EDDS). The effects of relevant parameters-mainly including those of sorbent dose, pH of the solution and initial concentration of Cu(II), Zn(II), Mn(II) and Fe(III) complexes with EDDS as well as phase contact time and temperature-on the adsorption efficiency were studied in detail by the static method. The experimental data were also characterized by kinetic and adsorption parameters obtained based on the Langmuir and Freundlich models of sorption as well as the Lagergren, Ho and McKay and Weber-Morris models.

Keywords: EDDS; heavy metal ions; new complexing agents; superabsorbents.