4. Overview of Adsorbents Obtained from Biomass Applied for Pesticide Removal from Aqueous Solutions.

Raw material	Activation method	Pesticide	Superficial area (m2 g–1)	Initial concentration (mg L–1); pH	Adsorption capacity (mg g–1)	Reference
Rice husk ash	Nitric acid and methanol	Fipronil	-	2.5;-	0.07
Byproducts of sawmills	Pyrolysis at 350 °C	Atrazine	1.467	4–10; -	0.424
	Pyrolysis at 450 °C		2.438		0.158
	Pyrolysis at 550 °C		3.565		0.127
Corn straw	Phosphoric acid and pyrolysis at 400 °C	Atrazine	573	30; 6.5	26.9
Araçá fruit husks	Ferric chloride and pyrolysis at 500 °C	Atrazine	431	5–40; pH 7	55.85
Rice husk	Potassium hydroxide and pyrolysis at 150–200 °C	Atrazine	5.16	30; -	2.18
Banana Peel Powder		Atrazine	-	20; pH 5.5	3.02
Açaí pulp	Zinc chloride and pyrolysis at 700 °C	Atrazine	920.56	200; pH 6.5	178
Sugar cane bagasse fly ash	-	Fipronil	-	0.02; pH 7.2	0.738
Hackberry seeds	Carbonization and activation with KOH at 300 and 500 °C	Atrazine	3.45	10; pH 2, 4, 6, 7, 8 and 10	107.29
Sugar cane bagasse and vinasse	Phosphoric acid and hydrothermal carbonization at 230 °C	Atrazine	11.92	0.04–0.4; pH 10	0.273	This study
		Fipronil			0.035