Competitive biosorption of cadmium(II) and zinc(II) ions from binary systems by Sargassum filipendula

Luna, Aderval S.; Costa, André L.H.; Costa, Antônio Carlos Augusto da; Henriques, Cristiane A.

doi:10.1016/j.biortech.2010.01.138

Cited by 96 publications

(45 citation statements)

References 31 publications

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“…Brown seaweeds, in particular, are resistant to environmental pollution and can support high pollution concentrations in the environment (Davis et al 2003;Luna et al 2010). On the other hand, prolonged exposure could result in metabolic damage, especially in growth rates and photosynthetic efficiency.…”

Section: Introductionmentioning

confidence: 99%

Effects of copper and lead exposure on the ecophysiology of the brown seaweed Sargassum cymosum

et al. 2015

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The effects of the heavy metals copper (Cu) and lead (Pb) on Sargassum cymosum were evaluated by determining uptake capacity, growth rates, photosynthetic efficiency, contents of photosynthetic pigments and phenolic compounds, 2,2-diphenyl-1-picrylhydrazyl radical-scavenging capacity, and morphological and cellular changes. S. cymosum was cultivated with Cu and Pb separately and combined at concentrations of 10, 25, and 50 μM for 7 days in laboratory-controlled conditions. Seaweeds under Cu treatment showed the highest biosorption capacity, and growth rates were significantly reduced compared to the control. The photosynthesis/irradiance curves showed alterations in kinetic patterns in the metal-treated samples. Specifically, Cu treatment alone inhibited electron transport rate (ETR) response, while Pb alone induced it. However, samples treated with both Cu and Pb (Cu + Pb) showed inhibition in ETR. The total amount of pigments increased relative to control. Light microscopy showed an increase in phenolic compounds, with physodes migrating towards cortical cells. Scanning electronic microscopy revealed alterations in the typical rough surface of thallus, when compared with control, especially for Pb treatments. Based on these results, it could be concluded that Cu and Pb are stress factors for S. cymosum, promoting alterations in seaweed metabolism and stimulating protective mechanisms against oxidative stress. However, the high bioaccumulation capacity of both heavy metals indicates a possible application for S. cymosum as a biosorbent agent for contaminated wastewater when metals are in low concentrations.

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Section: Introductionmentioning

confidence: 99%

Effects of copper and lead exposure on the ecophysiology of the brown seaweed Sargassum cymosum

et al. 2015

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“…As reported by Luna et al (15), the biomass of brown algae of the Sargassum genus is a superior adsorbent to other organic and inorganic adsorbents. Therefore, the aim of this paper was to assess the Sargassum oligocystum harvested from Persian Gulf for eliminating copper ions as a model of heavy metals.…”

Section: Introductionmentioning

confidence: 70%

The Potential of Sargassum oligocystum Harvested From Persian Gulf for the Adsorption of Copper Ions From Aqueous Solutions

Ramavandi¹,

Ebrahimi²,

Hashemi³

et al. 2015

Avicenna J Environ Health Eng

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This study revealed the potential of a brown alga, Sargassum oligocystum, harvested from Persian Gulf for the Cu 2+ adsorption from aqueous solutions. The adsorption kinetic and isotherm and the characteristics of the biomass prepared from S. oligocystum (BSO) were investigated. The BSO was a mesoporous adsorbent with Brunauer, Emmett, and Teller (BET) surface area, a total pore volume, and an average pore diameter of 0.487 m 2 /g, 1.423 cm 3 /g and 12.5 nm, respectively. Fourier transform infrared spectroscopy (FTIR) analysis showed that there were many active functional groups such as alcohol and phenol groups, carbonyl, ethers, and esters on the BSO. Batch tests demonstrated that the Langmuir isotherm model best represented the equilibrium data with maximum copper ions adsorption capacity of 8.23 mg/g. Pseudo-second-order kinetic model was found to satisfactory describe the adsorption process. BSO is an easy-prepared adsorbent and could be an option for the treatment of Cu 2+ -laden wastewaters.

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“…Luna et al (2010) studied the competitive biosorption of cadmium and zinc by Sargassum sp. biomass, indicating a good fit to Langmuir model.…”

Section: Equilibrium Study Of Uranium Biosorption (Isotherms)mentioning

confidence: 99%

Is <I>Sargassum</I> Amenable to Recover Uranium from Water in Nuclear Facilities

Ferreira¹,

Silva²,

Costa³

2011

International Journal of Nuclear Energy Management and Safety

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The results reported in the present paper indicated that Sargassum sp. brown seaweed is amenable to contamination by Uranium under synthetic conditions, and probably in natural environments subject to water leakage from uranium facilities, although physico-chemical characteristics of each particular environment still must be addressed. Sargassum sp. biomass was used as biosorbent material for Uranium in batch conditions. Kinetic and equilibrium conditions were studied. Results obtained indicated that Sargassum sp. biomass reached equilibrium after 60 minutes of contact with a 1.0 mg/L and a 100.0 mg/L solution. The kinetic behavior observed indicated a 20-30% biosorption of Uranium in the first 20 minutes of process followed by a slower uptake up to 38% Uranium biosorption.The kinetic modeling of the process indicated that the less concentrated uranium solution fitted well to a second-order kinetic model, while the 100.0 mg/L solution fitted well both the first and second-order kinetic models. Those conclusions were reached based on the high correlation coefficients obtained. Equilibrium batch tests showed that uranium biosorption was equal, both after 1 hour and 3 hours of contact between the biomass and distinct Uranium solutions. Freundlich and Langmuir models were used to fit the experimental data. The Freundlich model best described Uranium biosorption, in comparison to the Langmuir model, based on higher correlation coefficients obtained.

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Competitive biosorption of cadmium(II) and zinc(II) ions from binary systems by Sargassum filipendula

Cited by 96 publications

References 31 publications

Effects of copper and lead exposure on the ecophysiology of the brown seaweed Sargassum cymosum

Effects of copper and lead exposure on the ecophysiology of the brown seaweed Sargassum cymosum

The Potential of Sargassum oligocystum Harvested From Persian Gulf for the Adsorption of Copper Ions From Aqueous Solutions

Is <I>Sargassum</I> Amenable to Recover Uranium from Water in Nuclear Facilities

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