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EFFECT OF CONTACT TIME ON BIOSORPTION OF DIFFERENT METAL IONS BY EICHHORNIA CRASSIPES (MART) SOLMS.

Author(s) Dr. N. S. Gopkar
Country India
Abstract Exposure of the biosorbent in terms of contact time for the sorbate was of importance showing the biosorption efficiency of metal ions by different aquatic macrophyte species as a function of contact time (initial sorbate concentration of 20 mgm/l; sorbent concentration of 0.5 gm/l, pH 5.0 and pH 6.0). It was observed that the efficiency of biosorption for all aquatic macrophyte species increased significantly with the increase in contact time during the first 30 min., followed by slower uptake up to 120 min. of contact time and thereafter, equilibrium was probably achieved as there was no significant uptake in case of metal ions studied after 120 min., of exposure. It has been observed in present study that the optimum adsorption of all metal ions occurs at 120 min. on to the dried biomass of aquatic macrophytes as a biosorbent. Eichhornia crassipes (Mart) Solms reported with optimum adsorption of metal ions at a period of 120 min.(Table 4.2.1, & Fig. 4.2.1) for Cu(II) ion (15.6 mg/g) followed by Zn(II) ion (13.7 mg/g) , Ni (II) ion (12.9 mg/g), Pb(II) ion (12.8 mg/g)and Al (III) ion (12.4 mg/g). Highest percent removal for Cu (II) ions (80.41%) and lowest for Al (III) (80.20%) was reported by Eichhornia crassipes (Mart) Solms.
Keywords Heavy metals; Eichhornia crassipes; Biosorption; Contact time.
Field Biology > Agriculture / Botany
Published In Volume 12, Issue 1, January-March 2021
Published On 2021-03-03
Cite This EFFECT OF CONTACT TIME ON BIOSORPTION OF DIFFERENT METAL IONS BY EICHHORNIA CRASSIPES (MART) SOLMS. - Dr. N. S. Gopkar - IJSAT Volume 12, Issue 1, January-March 2021.
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