Найдено научных статей и публикаций: 1, для научной тематики: Scanning electron microscopy.
1.
Narayanaswamy Tamilselvan, Kumar Saurav, Krishnan Kannabiran
- Pharmacologyonline , 2011
Occupational exposure of heavy metals and toxins has been shown to produce adverse health
effects on humans. Biosorption has emerged as a cost$effective and efficient alternative
technology for removal of heavy metals. In the present study the biosorption of heavy metals b...
Occupational exposure of heavy metals and toxins has been shown to produce adverse health
effects on humans. Biosorption has emerged as a cost$effective and efficient alternative
technology for removal of heavy metals. In the present study the biosorption of heavy metals by
an algal species, Acanthophora spicifera was evaluated. Acid digestion method and batch
biosorption method was used to evaluate the efficiency of bisorption by A. spicifera. The effect
of biomass dosage of A. spicifera (1$30g/L) on biosorption of metal ions Cr (VI), Cr (III), Pb
(II), Cd (II) and Hg (II) was also studied. Acid digestion method showed maximum biosorption
of Pb (II) (93.61%) whereas the batch biosorption method showed maximum biosorption of Cr
(VI) (96.36%) followed by Hg (II) (96.20%), Cd (II) (92.68%), Pb (II) (51.84%), and Cr (III)
(50.29%) in the order of (Cr (VI) >Hg (II) >Cd (II) >Pb (II) >Cr (III). The biosorption was
biomass dosage dependent and increase of biomass increased the biosorption process. The
maximum biosorption of the metal ions was attained at a biomass dosage of 25g/L. Fourier
transform infrared absorption spectra indicated the chemical interactions between the hydrogen
atoms of carboxyl (–COOH), hydroxyl (–CHOH) and amine (–NH2) groups of biomass with
metal ions. Scanning electron microscopy revealed the enlargement size and surface
modification of biomass. The results of our study suggest that seaweed biomass can be used
efficiently for biosorption of heavy metals.