Table 2. Various sawdust-based adsorbents for different wastewater types.

Type of sawdust adsorbent	Adsorbent dose	Pollutant	pH	T/°C	Isotherm time, min	Removal/ %	Ref.
Magnetite: sawdust	2.0 g/L	Acetaminophen	7.0	32°C	2 h	83	This work
sawdust		Acid Blue 25 dye	4.0	26°C	2 h	59	[25]
Neem sawdust		Basic Crystal violet dye	7.2	NA	-	5	[26]
Neem sawdust		Basic Malachite Green dye	7.2	31°C	-	85	[26]
cellulose nanocrystal/ sawdust	0.1 g	Vanadium	3.0	45°C	4 h	95	[27]
Sawdust/Magnetite	0.2 g	Ca(II)	3.0	-	50 min	98	[9]
cellulose nanocrystal/ sawdust		Cu(II) and Pb(II)	7.0	23°C	6 h	90	[28]
ZrO2- sawdust		Arsenic	7.0	28°C	24 h	50	[11]
cellulose nanocrystal /ZnO	0.1 g	methylene blue	10.0	45° C	6.5 h	90	[7]
magnetic sawdust carbon @magnetite/ sawdust		methylene blue	7.0	55° C	30 min	85	[29]
sawdust	2.0 g	Lead	6.0	NA	50 min	98	[30]
magnetite/ sawdust		strontium	6.74	NA	30 min	25	[31]
Zerovalent Iron / sawdust		Arsenic (III)	7.74	NA	4 h	13	[32]
ZnO, sawdust & ZnOnp- sawdust		Pb (II)	8.0	20° C	100 min	70	[33]