Application of Chemically Modified and Unmodified Waste Biological Sorbents in Treatment of Wastewater

Table 4

Use of carbonized/uncarbonized waste cellulosic sorbents in removal of heavy metals from wastewater.

S/no.	Sorbents	Particle size	Contact time (mins)	% absorption of heavy metals
				Pb	Mn	Ni	Cr
(1)	Carbonized corncob	325 μm	60	76.00	63.79	92.31	64.15
(2)	Carbonized coconut husk	325 μm		61.18	73.47	74.87	74.34
(3)	Carbonized corncob	625 μm		37.65	64.63	66.15	44.15
(4)	Carbonized coconut husk	625 μm		70.59	47.16	52.56	58.87
(5)	Uncarbonized corn cob	325 μm		66.35	65.68	76.15	63.02
(6)	Uncarbonized coconut husk	325 μm		75.29	57.47	63.08	70.19
(7)	Uncarbonized corn cob	625 μm		71.76	47.16	52.31	42.26
(8)	Uncarbonized coconut husk	625 μm		61.65	57.68	49.74	36.60
(9)	Carbonized corncob	325 μm	120	71.76	70.11	94.87	63.40
(10)	Carbonized coconut husk	325 μm		91.06	77.26	82.56	83.40
(11)	Carbonized corncob	625 μm		48.24	78.11	65.13	52.45
(12)	Carbonized coconut husk	625 μm		74.12	78.11	68.21	65.28
(13)	Uncarbonized corn cob	325 μm		69.41	74.74	89.23	79.62
(14)	Uncarbonized coconut husk	325 μm		79.76	57.89	73.85	81.51
(15)	Uncarbonized corn cob	625 μm		34.59	47.79	66.15	50.19
(16)	Uncarbonized coconut husk	625 μm		69.41	57.89	62.05	50.19