Heavy metal sorption by microalgae

Sandau, E.; Sandau, P.; Pulz, Otto

doi:10.1002/abio.370160402

Cited by 131 publications

(58 citation statements)

References 18 publications

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“…They are able to eliminate metal ions from aquatic solutions in a short time by biosorption in uncomplicated systems, without any problems of toxicity. It is an important biochemical function of algae in the shaping of proper ecological relationships and interactions between organisms in the aquatic environment (Wilde and Benemann, 1993;Sandau et al, 1996;Bajguz, 2000).…”

Section: Resultsmentioning

confidence: 99%

Toxicological Response of the Green Alga <i>Chlorella vulgaris</i>, to Some Heavy Metals

Afkar¹

2010

American Journal of Environmental Sciences

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Problems statement:The disturbance of aquatic ecosystems provoked by heavy metals pollution from industrial and domestic sources, has as consequence the loss of biological diversity, as well as increased bioaccumulation and magnification of toxicants in the food chain. The aim of this study was to evaluate the effect of some heavy metals on some physiological activities of Chlorella vulgaris beyerinck with special references to metal bioaccumulation. Approach: Chlorella vulgaris Beyerinck was isolated from Al-Asfar Lake, Al-Hassa, Saudi Arabia. A standard initial inoculum of the isolated algae was inoculated to culture flasks. The culture flasks were supplied with various concentrations of Cobalt, Copper and Zinc ranging from 10 −6 -10 −9 M. At the end of the incubation period cultures were filtered and washed several times by distilled water for measurements the various experimental parameters. Results: The data show that the lower doses of the three tested metals had stimulatory effect in biomass yield of Chlorella vulgaris, whereas the higher doses were inhibitory depending on the type of the metal. The inhibitory effect of copper to the growth parameters of Chlorella vulgaris was more pronounced than other two tested metals. The total protein content, total carbohydrate and the total free amino acids of the tested green alga Chlorella vulgaris gradually decreased in a manner dependent on the metal concentration in the medium. On the other hand, bioaccumulation of cobalt, copper and zinc by Chlorella vulgaris cells were parallel to increasing the concentrations in the culture medium. Conclusion: The inhibitory and stimulatory effects of either of the used heavy metals depend on concentration. Different organisms, however, have different sensitivities to the same metal and the same organisms may be more or less damaged by different metals. The uptake of an element from the surrounding medium is seldom exactly proportional to the amount present in the water.

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Section: Resultsmentioning

confidence: 99%

Toxicological Response of the Green Alga <i>Chlorella vulgaris</i>, to Some Heavy Metals

Afkar¹

2010

American Journal of Environmental Sciences

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“…Cu(II), is one of the major contaminants physico-chemical methods for removing heavy metals emanating from electrical, electroplating and metal from waste streams include chemical reduction, electrochemical treatment, ion exchange, precipitation grinding in a mechanical grinder. The powder was sieved and evaporative recovery [15]. These processes have to get the adsorbent with size ranged 150 to 300 µm.…”

Section: Introductionmentioning

confidence: 99%

A Novel Agricultural Waste Adsorbent, Watermelon Shell for the Removal of Copper from Aqueous Solutions

Banerjee¹,

Ramesh

Gandhimathi³

2012

IJEE

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Abstract:The present study deals with the application of Watermelon Shell, an agricultural waste, for the adsorptive removal of Cu(II) from its aqueous solutions. This paper incorporates the effects of time, dose, temperature, concentration, particle size, agitation speed and pH. Analytical techniques have been employed to find pore properties and characteristics of adsorbent materials. Batch kinetic and isotherm studies have also been performed to understand the ability of the adsorbents. The adsorption behavior of the Cu(II) has been studied using Freundlich, Langmuir and Tempkin adsorption isotherm models. The monolayer adsorption capacity determined from the Langmuir adsorption equation has been found as 111.1 mg/g. Kinetic measurements suggest the involvement of pseudo-second-order kinetics in adsorptions and is controlled by a particle diffusion process. Adsorption of Cu(II) on adsorbents was found to increase on decreasing initial concentration, increasing pH up to 8, increasing temperature, increasing agitation speed and decreasing particle size. Overall, the present findings suggest that watermelon outer shell is environmentally friendly, efficient and low-cost biosorbent which is useful for the removal of Cu(II) from aqueous media.

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“…1 the gastrointestinal tracts in humans (Canuel et al, 2006). Since Chlorella is known to have an ability to adsorb several heavy metals (Sandau et al, 1996), the dietary components of BP may adsorb a part of MeHg in the gastrointestinal tract. In fact, 80% of lead was adsorbed on dBP in 200 ppm of lead solution (Uchikawa et al, 2009).…”

Section: Parachlorella Beyerinckiimentioning

confidence: 99%

“…It is already known that Chlorella has the ability to adsorb some metals such as Cd, Zn, Cu, and Pb (Sandau et al, 1996). It has therefore been utilized in waste water treatment systems to reduce contaminated heavy metals (Almaguer Cantu et al, 2008).…”

Section: Introductionmentioning

confidence: 99%

The influence of Parachlorella beyerinckii CK-5 on the absorption and excretion of methylmercury (MeHg) in mice

Uchikawa¹,

Yasutake

Kumamoto³

et al. 2010

J. Toxicol. Sci.

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-Chlorella (Parachlorella beyerinckiiChlorella vulgaris CK-5, is a unicellular green algae that has for many years been used as a nutritional supplement. In order Chlorella, we examined the absorption and excretion of MeHg in mice. Female C57BL/6N mice were randomly divided into three groups 5 mg (4 mg Hg)/kg body weight with or without 100 mg/mouse of P. beyerinckii powder (BP), and were assigned to either a MeHg group or MeHg + BP group, accordingly. Twenty-four hr after oral administration, feces and urine were collected, and blood, liver, and kidney samples were obtained. Total mercury contents in the samples obtained were determined using an atomic absorption method. The amounts of Hg excreted in feces and urine of the MeHg + BP group were increased nearly 1.9 and 2.2-fold compared -ent between two groups. These results suggest that the intake of BP may induce the excretion of Hg both in feces and urine, although it does not affect MeHg absorption from the gastrointestinal tract. The effect of BP on the tissue mercury accumulation may become evident in a long-term experiment.Parachlorella beyerinckii, MeHg, Chlorella

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Heavy metal sorption by microalgae

Cited by 131 publications

References 18 publications

Toxicological Response of the Green Alga <i>Chlorella vulgaris</i>, to Some Heavy Metals

Toxicological Response of the Green Alga <i>Chlorella vulgaris</i>, to Some Heavy Metals

A Novel Agricultural Waste Adsorbent, Watermelon Shell for the Removal of Copper from Aqueous Solutions

The influence of Parachlorella beyerinckii CK-5 on the absorption and excretion of methylmercury (MeHg) in mice

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