Biosorption of Cu(II) ions from synthetic and actual wastewater using three algal species

A series of batch lab-scale experiments were performed to investigate the performance of dead phosphorylated algal biomass of Spirogyra species for the bioadsorption of Cu +2 ions from aqueous solutions. FT-IR and SEM analyses were performed to characterize the phosphorylated and raw algae. The SEM analysis indicated that the phosphorus content increases by about 5 times. The isotherm equilibrium data indicated that phosphorylation enhances the removal of Cu +2 from water by about 20%. The experimental isotherms fit well to Langmuir models with R 2 values close to 0.99.Adsorption kinetic study was conducted to investigate the effect of initial Cu +2 concentrations, pH, and adsorbent dose on the loading capacity of algal biomass. The optimum pH for the process was around 6 and the corresponding maximum loading capacity was 65 mg/g. The pseudo second-order kinetics successfully modeled the kinetic results with R 2 values closed to 0.99. The thermodynamic results indicated that the bioadsorption process is endothermic and spontaneous at initial Cu +2 concentrations lower than 100 mg/L. The results were promising and encourage the design of a continuous process using algal biomass to remediate water polluted with heavy metals.

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“…Eqs. (13) through (15) were used to calculate the thermodynamic parameters for the adsorption process.…”

Section: Adsorption Thermodynamicsmentioning

confidence: 99%

Impact of surface modification of green algal biomass by phosphorylation on the removal of copper(II) ions from water

Al-Qodah¹,

Al-Shannag²,

Amro³

et al. 2017

Turk J Chem

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“…Deng et al (2006) verified an increase in the efficiency of copper removal from Cladophora fascicularis when the concentration of HNO 3 was increased. Siao et al (2007) investigated the desorption of copper from different algal biomasses using 0.11 mol/L HCl as desorbent and the obtained efficiencies of removal from freshwater algae H. welwitschii, A. laxa, and C. sorokiniana were 70.85%, 64.54%, and 73.20%, respectively. Herrero et al (2008) obtained 90% of removal efficiency using 0.1 mol/L HNO 3 to desorb cadmium (II) ion from red alga Mastocarpus stellatus.…”

Section: Investigation Of Copper(ii) Ion Desorption In Batch Systemmentioning

confidence: 99%

Copper Biosorption by Biomass of Marine Alga: Study of Equilibrium and Kinetics in Batch System and Adsorption/Desorption Cycles in Fixed Bed Column

Fagundes‐Klen

Veit

Borba

et al. 2010

Water Air Soil Pollut

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Copper biosorption onto chemically modified biomass of marine alga Sargassum filipendula was investigated in a batch reactor and a fixed bed column. Experiments were carried out in the batch reactor to obtain kinetic and equilibrium data and to assess the copper desorption efficiency of different eluent solutions. The pseudo-first-order, pseudosecond-order, and Langmuir kinetic models were used to correlate kinetic data. The experimental data fitted well to the pseudo first order and Langmuir kinetic models. Langmuir and Freundlich models were applied to describe the equilibrium data obtained at a fixed temperature of 30°C and at pH values of 3.0, 4.0, 5.0, and 6.0. The maximum capacities of copper biosorption onto the algal biomass were 1.43, 1.59, 2.40, and 2.36 mequiv./g at pH 3.0, 4.0, 5.0, and 6.0, respectively. The efficiencies of two eluent solutions (calcium chloride and hydrochloric acid) for copper removal from the biomass were evaluated at different concentrations (0.1, 0.2, 0.5, and 1.0 mol/L). The efficiencies of the calcium chloride solutions varied from 1% to 14%, while efficiencies varying from 95% to 99% were obtained when hydrochloric acid solutions were applied. Three adsorption/desorption cycles were carried out in a fixed bed column using 0.1 mol/L hydrochloric acid as eluent solution. The results showed that an increase in the number of cycles led to a reduction in the adsorption capacity of the alga. The desorbed copper fraction presented no significant variation, remaining around 63% in the three adsorption/desorption cycles.

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“…If allowed to enter the environment excessive amounts of Cu(II) can cause serious potential health issues such as nausea, headache dizziness, respiratory difficulty, hemolytic anemia, massive gastrointestinal bleeding, liver and kidney failure, and death [4–9]. The World Health Organization (WHO) recommended a maximum acceptable concentration of Cu(II) in drinking water of 1.5 mg L −1 [5].…”

Section: Introductionmentioning

confidence: 99%

Kinetic and thermodynamic studies of the biosorption of Cu(II) by Agaricus campestris

Daniş

2011

Env Prog and Sustain Energy

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Agaricus campestris was used as an adsorbent for the adsorption of Cu(II) ions in water. The adsorption process was carried out in a batch process and the effects of contact time, initial pH, initial Cu(II) ion concentration, adsorbent amount, and temperature on the adsorption were investigated. Kinetic calculation results from the recent experiments showed that the amount of adsorbed Cu(II) increased with increasing Cu(II) concentration, pH, temperature, contact time and with decreasing adsorbent amount. Pseudo-second-order reaction model provided the best description of the data with a correlation coefficient 0.99-1 for different initial metal concentrations and temperatures were studied. The equilibrium data were well fitted to the Langmuir isotherm. The maximum adsorption capacity for Cu(II) was 32.52 mg g 21 at 298 K. Thermodynamic parameters such as DH 0 , DS 0 and DG 0 were calculated. The adsorption process was found to be endothermic and spontaneous.

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Biosorption of Cu(II) ions from synthetic and actual wastewater using three algal species

Cited by 17 publications

References 9 publications

Impact of surface modification of green algal biomass by phosphorylation on the removal of copper(II) ions from water

Impact of surface modification of green algal biomass by phosphorylation on the removal of copper(II) ions from water

Copper Biosorption by Biomass of Marine Alga: Study of Equilibrium and Kinetics in Batch System and Adsorption/Desorption Cycles in Fixed Bed Column

Kinetic and thermodynamic studies of the biosorption of Cu(II) by Agaricus campestris

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