Найдено научных статей и публикаций: 2, для научной тематики: Biosorption
1.
Narayanaswamy Tamilselvan, Kumar Saurav, and Krishnan Kannabiran
- J. Ocean Univ. China (Oceanic and Coastal Sea Research) , 2011
Heavy metal pollution is one of the most important environmental problems today. Biosorption is an innovative tech-
nology that employs biological materials to accumulate heavy metals from waste water through metabolic process or physicochemi-
cal pathways of uptake. Even though several physical and...
Heavy metal pollution is one of the most important environmental problems today. Biosorption is an innovative tech-
nology that employs biological materials to accumulate heavy metals from waste water through metabolic process or physicochemi-
cal pathways of uptake. Even though several physical and chemical methods are available for removal of heavy metals, currently
many biological materials such as bacteria, algae, yeasts and fungi have been widely used due to their good performance, low cost
and large quantity of availability. The aim of the present study is to explore the biosorption of toxic heavy metals, Cr(VI), Cr(III),
Pb(II) and Cd(II) by algal biomass obtained from algae Sargassum wightii (brown) and Caulerpa racemosa (green). Biosorption of
algal biomass was found to be biomass concentration- and pH-dependent, while the maximal biosorption was found at pH 5.0 and
with the metal concentration of 100 mgL-1
. Sargassum wightii showed the maximal metal biosorption at the biomass concentration of
25 g L-1
, followed by Caulerpa racemosa with the maximal biosorption at 30 gL-1
. Sargassum wightii showed 78% biosorption of
Cr(VI), Cr(III), Pb(II) and Cd(II) ions. Caulerpa racemosa exhibited 85% biosorption of Cd(II) and Cr(VI), and 50% biosorption of
Cr(III) and Pb(II). The results of our study suggest that seaweed biomass can be used efficiently for biosorption of heavy metals.
2.
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.