- Şenol Z.M.
- International Journal of Environmental Analytical Chemistry
- 102(16): 4550–4564
Allura red (AR), which is known as the monoazo class of synthetic
food colourant(E129) has been widely used in food industries. Due
to the potential toxicity of azo dyes and pathogenicity, the removal
of AR from industrial wastewaters is very important environmentally.
So, this article aims to investigate the biosorption process of
AR by lichen (Pseudoevernia furfuracea) from aqueous solutions.
Batch biosorption conditions of AR food dye onto lichen biosorbent
as initial AR concentration, solution pH, contact time, temperature
and recovery were investigated. From the results, it has been
observed that the highest removal efficiency is approximately
87% at a contact time of 5 hours, initial AR food dye concentration
of 1000 mgL−1 and agitation speed of 150 rpm at natural pH 8.0.
The maximum ARbiosorption capacity from the Langmuir model
was found as 0.280 mol kg−1 at 25°C. Biosorption kinetics were
analysed by using intra-particle diffusion and pseudo-secondorder
models. Biosorption thermodynamics has shown that
ARbiosorption onto lichen biosorbent is endothermic, possible
and spontaneous. The lichen (Pseudoevernia furfuracea) can
become an alternative biosorbent for the removal of AR from the
environment and wastewater.
- Wednesday, 28 December 2022 21:53