	US 12,186,735 B2
	Batch method for wastewater treatment
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. 18/808,269.
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 18/808,269 is a continuation of application No. 17/745,929, filed on May 17, 2022, granted, now 12,102,978.
Prior Publication US 2024/0408576 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 batch method for treating wastewater, comprising:

crushing a composite to form composite particles having an average particle size of 50-200 μm,

contacting an aqueous solution having an initial concentration of a pollutant with the composite particles to form a mixture; and

filtering the mixture to obtain a pollutant loaded composite and an aqueous solution having a reduced concentration of the pollutant compared to the initial concentration,

wherein the composite comprises:

a magnetic core comprising Fe₃O₄disposed on activated carbon; and

a branched polyethylenimine,

wherein the Fe₃O₄is 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.