Removal of cadmium(II) from aqueous solution by adsorption onto modified algae and ash

Harja, Maria; Buema, Gabriela; Bulgariu, Laura; Bulgariu, Dumitru; Sutiman, Daniel; Ciobanu, Gabriela

doi:10.1007/s11814-015-0016-z

Cited by 44 publications

(26 citation statements)

References 44 publications

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“…The initial concentration of NPs in water influenced the adsorption of algae to NPs. With an increase in initial concentration, the adsorption capacity of algae to NPs increased [37]. The adsorption process was very fast at the initial stage, but afterwards the rate of adsorption decreased slowly until it reached saturation [37].…”

Section: Introductionmentioning

confidence: 97%

“…With an increase in initial concentration, the adsorption capacity of algae to NPs increased [37]. The adsorption process was very fast at the initial stage, but afterwards the rate of adsorption decreased slowly until it reached saturation [37]. The amount of NPs adsorbed by algae from the water varied significantly with the change of solution pH.…”

Section: Introductionmentioning

confidence: 99%

“…Two isotherm models, the Langmuir and Freundlich models, are widely used to fit the adsorption isotherm experimental data [35,36]. In general, the studies of adsorption kinetic and isotherm models show that the adsorption of algae to NPs is best fitted to a pseudo-second order kinetic model and Langmuir isotherm model [35,37,38]. The initial concentration of NPs in water influenced the adsorption of algae to NPs.…”

Section: Introductionmentioning

confidence: 99%

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Effects of Nanoparticles on Algae: Adsorption, Distribution, Ecotoxicity and Fate

et al. 2019

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With the rapid development of nanotechnology and widespread use of nanoproducts, the ecotoxicity of nanoparticles (NPs) and their potential hazards to the environment have aroused great concern. Nanoparticles have increasingly been released into aquatic environments through various means, accumulating in aquatic organisms through food chains and leading to toxic effects on aquatic organisms. Nanoparticles are mainly classified into nano-metal, nano-oxide, carbon nanomaterials and quantum dots according to their components. Different NPs may have different levels of toxicity and effects on various aquatic organisms. In this paper, algae are used as model organisms to review the adsorption and distribution of NPs to algal cells, as well as the ecotoxicity of NPs on algae and fate in a water environment, systematically. Meanwhile, the toxic effects of NPs on algae are discussed with emphasis on three aspect effects on the cell membrane, cell metabolism and the photosynthesis system. Furthermore, suggestions and prospects are provided for future studies in this area.

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Section: Introductionmentioning

confidence: 97%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Effects of Nanoparticles on Algae: Adsorption, Distribution, Ecotoxicity and Fate

et al. 2019

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“…6 Any carbon material can be used to produce activated carbon. Up to now, several studies have been conducted using activated carbon derived from agricultural wastes such as peanut crust, nuts shell, tamarind shell, peanut shell, 16 rice bran, rice hulls, banana peel, orange peel, apple peel, hazelnut, walnut shell, tree's leaf and bark, oak essence, cane bagasse, corn, wheat bran, sawdust, sunflower stem, grape stem, modified algae, alfalfa and mustard [13][14][15][17][18][19][20][21][22][23][24][25][26][27] for the removal of pollutants from wastewater.…”

Section: Introductionmentioning

confidence: 99%

Sulfate Ion Removal From Water Using Activated Carbon Powder Prepared by Ziziphus Spina-Christi Lotus Leaf

Rahmati

Yeganeh

Esmaeili

2019

ACSi

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In this paper, the adsorption potential of activated carbon prepared by Ziziphus spina-christi lotus leaf for the removal of sulfate from aqueous solution was investigated. To this end, the effect of different parameters such as pH, contact time, temperature, adsorbent concentration, and initial sulfate ion concentration was investigated. The results indicated that the highest adsorption efficiency (84.5%) was obtained at pH 6, adsorbent concentration of 5 g/L, sulfate ion concentration of 20 ppm, 65 min and temperature of 45 °C. Also, the adsorption equilibrium study showed that the adsorption process follows the Langmuir isotherm model with the maximum adsorption capacity of 9.3 mg/g. In addition, the thermodynamic study showed that the adsorption process on the activated carbon surface was spontaneous. Moreover, the adsorption process was exothermic accompanied by a decrease in irregularity. Furthermore, the adsorption kinetic study indicated that the adsorption process follows the pseudo-second-order kinetic model.

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“…Cadmium is used in numerous industries for electroplating, manufacture of nickel–cadmium batteries, and in paint pigments and polyvinyl chloride plastics [ 4 , 5 , 6 ]. For the disposal of heavy metals, like cadmium, biological treatments [ 7 , 8 ], physicochemical treatments [ 9 , 10 ], ion-exchange [ 11 ], membrane filtration [ 12 ], and adsorption is used [ 13 , 14 , 15 ].…”

Section: Introductionmentioning

confidence: 99%

Chlamydomonas angulosa (Green Alga) and Nostoc commune (Blue-Green Alga) Microalgae-Cellulose Composite Aerogel Beads: Manufacture, Physicochemical Characterization, and Cd (II) Adsorption

et al. 2018

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This study presents composite aerogel beads prepared by mixing dissolved cellulose with Chlamydomonas angulosa and Nostoc commune cells, respectively, at 0.1, 0.3, and 0.5% (w/w). The manufactured composites (termed regenerated cellulose (RC)), with C. angulosa (RCCA-(1, 3, and 5)), and with N. commune (RCNC-(1, 3, and 5)) were analyzed. Both RCCA-5 and RCNC-5 showed the high specific surface area to be about 261.3 and 332.8 m2·g−1. In the microstructure analysis, network structures were observed in the cross-sections of RC, RCCA-5, and RCNC-5. The pyrolysis temperature of the RCCA-5 and RCNC-5 composite aerogel beads was rapidly increased about 250 °C during the mixing of cellulose with C. angulosa and N. commune. The chemical analysis of RC, RCCA-5, and RCNC-5 showed peaks corresponding to various functional groups, such as amide, carboxyl, and hydroxyl groups from protein, lipid, and carbohydrate. RCNC-5 at pH 6 demonstrated highest Cd2+ removal rate about 90.3%, 82.1%, and 63.1% at 10, 25, and 50 ppm Cd2+, respectively. At pH 6, Cd2+ adsorption rates per unit weight of the RCNC-5 were about 0.9025, 2.0514, and 3.1547 mg/g at 10, 25, and 50 ppm, respectively. The peaks assigned to the amide, carboxyl, and hydroxyl groups in RCCA-5, RCNC-5, and RC were shifted or disappeared immediately after adsorption of Cd2+. The specific surface area, total pore volume, and mean pore diameter of composites was decreased due to adsorption of Cd2+ on the developed materials. As can be seen in the X-ray powder diffraction (XRD) spectrum, significant changes in the molecular structure of the composite aerogel beads were not observed even after adsorption of Cd2+.

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Removal of cadmium(II) from aqueous solution by adsorption onto modified algae and ash

Cited by 44 publications

References 44 publications

Effects of Nanoparticles on Algae: Adsorption, Distribution, Ecotoxicity and Fate

Effects of Nanoparticles on Algae: Adsorption, Distribution, Ecotoxicity and Fate

Sulfate Ion Removal From Water Using Activated Carbon Powder Prepared by Ziziphus Spina-Christi Lotus Leaf

Chlamydomonas angulosa (Green Alga) and Nostoc commune (Blue-Green Alga) Microalgae-Cellulose Composite Aerogel Beads: Manufacture, Physicochemical Characterization, and Cd (II) Adsorption

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