2 research outputs found
Nanocellulose for biosorption of chlorpyrifos from water: chemometric optimization, kinetics and equilibrium
The study explores the biosorption potential
of nanocellulose (NC) to remove an insecticide,
chlorpyrifos (CP), from aqueous solutions using the
batch method. Biosorption kinetics were very fast and
reached equilibrium in 60 min, and the experimental
kinetic data had fit well with the pseudo-second-order
model. Film diffusion was the rate-limiting step for the
biosorption of CP onto crystalline nanocellulose
(CNC). The equilibrium sorption was well described
by the Sips and Langmuir isothermmodels. The values
of maximum sorption capacities (7.237–5.017 mg/g
for the Sips and 12.325–7.247 mg/g for the Langmuir
model) decreased with an increase in temperature
from 288 to 308 K, signifying biosorption of CP is an
exothermic process. Based on the central composite
design (CCD), two-factor interaction (2FI) and quadratic
models, the correlation between the effects of
variable parameters on the CP biosorption onto NC
was evaluated. The chemometric analyses suggested
that 1.5 g/l NC required 20 min to biosorb 5 mg/l CP
to yield an efficiency of 99.3%. Overall, the results
demonstrated that NCs can be a promising biosorbent
for the removal of pesticides from aqueous streams