Evaluation of Agrowaste Species for Removal of Heavy Metals from Synthetic Wastewater

Table 4

The adsorption studies of removing heavy metals in aqueous solution using adsorbents Freundlich, Langmuir (F-L) model, kinetic model, adsorption capacity Q_max, contact time, dose, and initial concentration.

Metal	Adsorbent	pH	Dose (g)	Initial conc (mg/L)	Contact time (min)	Q max	F-Lmodels	Kinetic model	Type of metals solution
Pb	ML	3.0-6.0-9.0	0.1–0.5	0.5–10	15–90	25.4	L	First-order model	Ternary
Cu						19.1	F
Cr						9.7	L
Zn						7.0	L
Se						9.5	L
Pb	MB					20.2	F
Cu						8.0	F
Cr						6.8	F
Zn						5.5	L
Se						1.4	L
Pb	T					20.1	F
Cu						13	L
Cr						7.0	F
Zn						5.9	L
Se						5.6	F
Pb	S					9.8	L
Cu						11.1	L
Cr						8.5	L
Zn						7.7	F
Se						6.5	F
Pb	L					22.7	L
Cu						4.8	L
Cr						7.0	L
Zn						5.8	L
Se						5.6	F