Evaluation of the adsorption efficiency of glycine-, iminodiacetic acid -, and amino propyl- functionalised silica nanoparticles for the removal of potentially toxic 4 elements from contaminated water solution

Journal Article
Alotaibi, Abdullah M Alswieleh 1,*,ξ , Hajar Y Albahar 1, Amal M Alfawaz 1, Abdulilah S Alsilme 2, 6 Abeer M Beagan 1, Ali M Alsalme 1, Mohammed S Almeataq 2, Ahmed Alshahrani 2 and 7 Khalid M . 2020
Publication Work Type
paper
Magazine \ Newspaper
Journal of Nanomaterials
Issue Number
-
Volume Number
-
Pages
-
Conference Date
Publication Abstract

In present work, mesoporous silica nanoparticles (MSNs) were prepared with a surface area 15 of 1048 m2g-1 and a large pore size of ca. 6 nm, using Stöber process in the presence of 16 expanding reagent (n-hexane). The surface of MSNs was modified with three different 17 functional groups (amine, iminodiacetic acid and glycine) and characterized by a variety of 18 physicochemical techniques. The adsorption studies were carried out at different pH values in 19 two extraction systems. In batch method, the maximum adsorption efficiency of heavy metals 20 was measured to be 95 % for all fabricated MSNs at pH 9. At pH 3, the adsorption efficiency 21 of Pb and Cu were observed to be affected by the carboxylic moiety involved in the 22 functional group. As the number of carboxylic moieties increase, the removal efficiency of 23 Pb and Cu ions increased by two folds. The results demonstrated the selectivity of IDA-24 MSNs for the removal of Pb and Cu ions, even though the present of multi-elements in an 25 aqueous solution. On the other hand, the incorporation of MSNs into the polymeric 26 membrane showed high water permeability (9.96 ± 3 L/m2.h.bar), and 98% rejection was 27 achieved at pH 7 for Cu+2 and Pb+2 ions