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A Study of kinetics And Biosorption Isotherms of
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M Malakootian *   1, GH.R Moussavi , A Toolabi |
| 1- , m.malakootian@yahoo.com |
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Abstract: (24607 Views) |
| Introduction: One of the effective
technologies to remove heavy metals is to
use bio-absorbents which are economical,
easy to access, and conformed to
environmental standards. The aim of this
research was to study the biosorption level
of copper, zinc, lead, and cadmium using
Ulothrix Zonata Algae from industrial
wastewater.
Materials & Methods: was a cross
sectional investigation. Sampling was done
from wastewater of battery-making,
electroplating and copper industries of
Kerman City. Initial levels of Copper, Zinc,
Lead and Cadmium were measured by
atomic absorption spectrometry. To
determine the absorption level of such
metals by Ulothrix Zonata absorbent,
various amounts of absorbent (0.2, 0.4, 0.5,
1, 1.5 g) were exposed to the mentioned
wastewater under different pHs (3, 4, 5, 6,
7), various temperatures (10, 15, 20, 25, 30
°C) and different exposure times (15, 30,
45, 60 and 80 min). Then, the absorption
isotherms and kinetic modeling of metallic
ions were determined on the absorbent
based on testing Longmuir, Freundlich, and
first and second grade kinetics isotherm
models.
Findingsq Level of removing metals by
Ulothrix Zonata absorbent was different. In
optimum temperature 25 °C, optimum pH 4
for copper and lead metals , optimum pH 5
for zinc and cadmium metals, balanced
contact time of 60 min and absorbent level
of 1.5 g/L, removal level of copper, zinc,
lead and cadmium was 98.2%, 96%, 98.4%
and 94.7% respectively. The removal rate
of lead was more than the other metals.
Discussion & Conclusion: Isotherm
parameters showed that absorbent capacity
for absorbing lead was higher, but
absorption of copper and cadmium metals
with energy height occurred. Concerning
high absorption efficiency, Ulothrix Zonata
algae can effectively be used to biosorption
of heavy metals from industrial wastewater. |
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| Keywords: Isotherm and Kinetic, heavy |
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Full-Text [PDF 1009 kb]
(5051 Downloads)
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Type of Study: Research |
Subject:
General
Received: 2012/03/13 | Published: 2012/01/15
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