	US 12,145,865 B1
	Hydrogel nanobeads for adsorption of pollutants from wastewater
Javed Alam, Riyadh (SA); Mansour Salah Alhoshan, Riyadh (SA); Fekri Abdulraqeb Ahmed Ali, Riyadh (SA); and Arun Kumar Shukla, Riyadh (SA)
Assigned to KING SAUD UNIVERSITY, Riyadh (SA)
Filed by KING SAUD UNIVERSITY, Riyadh (SA)
Filed on Aug. 11, 2023, as Appl. No. 18/233,089.
Int. Cl. C02F 1/28 (2023.01); B01J 20/02 (2006.01); B01J 20/24 (2006.01); B01J 20/28 (2006.01); B01J 20/30 (2006.01); C02F 101/30 (2006.01); C08J 3/075 (2006.01); C08J 3/24 (2006.01)

CPC C02F 1/286 (2013.01) [B01J 20/0244 (2013.01); B01J 20/24 (2013.01); B01J 20/28007 (2013.01); B01J 20/28019 (2013.01); B01J 20/28047 (2013.01); B01J 20/30 (2013.01); C08J 3/075 (2013.01); C08J 3/24 (2013.01); C02F 2101/308 (2013.01); C08J 2305/00 (2013.01)]

7 Claims

1. A hydrogel nanobead, comprising an ionically crosslinked sulfated polysaccharide biopolymer and having a size ranging from about 20 nm to about 100 nm, wherein the ionically crosslinked sulfated polysaccharide biopolymer comprises carrageenan crosslinked with a metal ion crosslinking agent, the metal ion crosslinking agent comprising Zn²⁺ and having a concentration selected from about 0.01 wt % to about 1.0 wt %.