Fast and Selective Adsorption of Au (III) from the Waste Printed Circuit Boards Using a Low-Cost Adsorbent: Optimization by Central Composite Design Based on Response Surface Methodology

Table 3

Comparison of adsorption capacities, time required, and temperature to reach the equilibrium of several adsorbents for Au (III).

Adsorbents	Qm	Isotherm	Kinetic	pH	T ()	Time (h)	Reference
DACS-TA	298.5	Langmuir	PSO	2	333	22	[53]
Asn@SBA-15	307	Langmuir	PSO	2.09	303	2.5	[55]
UHMWPE-g-PAO	220	Freundlich	—	3	298	—	[60]
PANF-ATL	130.58	Langmuir	PSO	0.1 M HCl	298	4	[63]
CFP-g-PHCTMA	137.6	—	PSO	0.1 M HCl	298	3	[72]
AIAC	191.92	Langmuir	PSO	1	298	24	[73]
3, 4-DHB-MCM-41	290	—	—	5	298	—	[74]
D301-g-THIOPGMA	300.4	Langmuir	PFO	2	298	5	[75]
D301-g-EDAPGMA	274.7	Langmuir	PFO	2	298	5	[75]
Graphene oxide	108.342	Langmuir	PSO	6	298	6	[76]
PPF resin	506	—	—	0.58 M HCl	303	24	[77]
GO	159.34	Langmuir	PFO and PSO	11	298	1	[78]
GO	171.23	Langmuir	—	11	308	—	[78]
Au-C-PTS	140.54	Langmuir	PSO	5	303	3	[79]
GA	315.450	Freundlich	PSO	2	303	0.5	This work