US 12,186,736 B2
Wastewater treatment method for aqueous solutions
Tawfik Abdo Saleh Awadh, Dhahran (SA); and Akram Abdulhakeem Al-Absi, Dhahran (SA)
Assigned to King Fahd University of Petroleum and Minerals, Dhahran (SA)
Filed by King Fahd University of Petroleum and Minerals, Dhahran (SA)
Filed on Aug. 19, 2024, as Appl. No. 18/808,285.
Application 17/745,929 is a division of application No. 16/519,692, filed on Jul. 23, 2019, granted, now 11,583,828, issued on Feb. 21, 2023.
Application 18/808,285 is a continuation of application No. 17/745,929, filed on May 17, 2022, granted, now 12,102,978.
Prior Publication US 2024/0408577 A1, Dec. 12, 2024
This patent is subject to a terminal disclaimer.
Int. Cl. B01J 20/28 (2006.01); B01J 20/06 (2006.01); B01J 20/20 (2006.01); B01J 20/26 (2006.01); B01J 20/30 (2006.01); C02F 1/28 (2023.01); C08G 83/00 (2006.01); C01B 32/354 (2017.01); C02F 101/22 (2006.01); C02F 101/30 (2006.01)
CPC B01J 20/28009 (2013.01) [B01J 20/06 (2013.01); B01J 20/20 (2013.01); B01J 20/262 (2013.01); B01J 20/28061 (2013.01); B01J 20/28071 (2013.01); B01J 20/28083 (2013.01); B01J 20/3085 (2013.01); C02F 1/288 (2013.01); C08G 83/001 (2013.01); B01J 2220/46 (2013.01); B01J 2220/4806 (2013.01); C01B 32/354 (2017.08); C02F 2101/22 (2013.01); C02F 2101/308 (2013.01)] 11 Claims
 
1. A wastewater treatment method for an aqueous solution, comprising:
crushing a composite to form composite particles,
mixing the aqueous solution having an initial concentration of a pollutant with the composite particles for from 6 to 40 minutes to form a mixture; and
filtering the mixture to obtain a pollutant loaded composite and an aqueous solution free of the pollutant compared to the initial concentration,
wherein the composite comprises:
a magnetic core comprising Fe3O4 disposed on activated carbon; and
a branched polyethylenimine,
wherein the Fe3O4 is in the form of nanoparticles having an average particle size of 1-100 nm; and
wherein the magnetic core comprises activated carbonyl groups on a surface of the magnetic core.