Peculiarities of adsorption of Cr (VI) ions on the surface of Chlorella vulgaris ZBS1 algae cells

Tattibayeva, Zhadra; Tazhibayeva, Sagdat; Kujawski, Wojciech; Zayadan, B. K.; Мusabekov, Kuanyshbek

doi:10.1016/j.heliyon.2022.e10468

Cited by 20 publications

(6 citation statements)

References 81 publications

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“…The average adsorption energy E calculated from the Dubinin-Radushkevich isotherm model was less than 8 kJ mol -1 , implying that physical adsorption took place at 298 K [28, 52, 53]. Thus, the adsorption of Cr(VI) onto pu-erh was a complex process that involved physical and chemical adsorption, as well as monolayer and multilayer adsorption.…”

Section: Resultsmentioning

confidence: 99%

“…Table 7 shows that the values of n in all three cases were greater than one, indicating that the adsorption of Cr(VI) onto the three types of tea residues was favorable [10,17]. The average adsorption energy E calculated from the Dubinin-Radushkevich isotherm model was less than 8 kJ mol -1 , implying that physical adsorption took place at 298 K [28,52,53]. Thus, the adsorption of Cr(VI) onto puerh was a complex process that involved physical and chemical adsorption, as well as monolayer and multilayer adsorption.…”

Section: Adsorption Isothermsmentioning

confidence: 99%

See 1 more Smart Citation

Removal of Hexavalent Chromium by Using Sustainable Green Materials as Low-Cost Adsorbents

Li,

Huang,

Weng

et al. 2023

Adsorption Science & Technology

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The possibility of using three types of NaOH-treated tea residues (green tea, pu-erh, and tieguanyin) as low-cost adsorbents for Cr(VI) treatment was investigated. The surface charge, composition, morphology, structure, and functional groups in the obtained biosorbents were characterized by pHzpc, cellulose content, SEM, BET, XRD, and FTIR spectroscopy. The nonlinear pseudo-first-order, pseudo-second-order, and Elovich models were used to investigate adsorption kinetics at various initial concentrations. The adsorption processes were more consistent with the pseudo-second-order kinetic model in the range of 5-50 mg L-1. The adsorption isotherm at 298 K was described using the nonlinear Langmuir, Freundlich, Temkin-Pyzhev, and Dubinin-Radushkevich models, indicating that the process was favorable and complex with maximum adsorption amounts of 6.15, 19.50, and 12.31 mg g-1 for green tea, pu-erh, and tieguanyin residues, respectively. Thermodynamic analysis revealed that the adsorption was a spontaneous, endothermic process. The results demonstrated that all materials had the potential to successfully remove Cr(VI) from the aqueous solution.

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Section: Resultsmentioning

confidence: 99%

Section: Adsorption Isothermsmentioning

confidence: 99%

Removal of Hexavalent Chromium by Using Sustainable Green Materials as Low-Cost Adsorbents

Li,

Huang,

Weng

et al. 2023

Adsorption Science & Technology

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“…The zeta potential of Microcystis was measured with a Malvern Zetasizer (Malvern-Nano-ZSMalvern, UK) ( Tattibayeva et al., 2022 ). The pH was determined with a pH meter (pH100A, EcoSence, China).…”

Section: Methodsmentioning

confidence: 99%

Effect of extracellular polymeric substances on the colony size and morphological changes of Microcystis

Pan,

Yang,

et al. 2024

Front. Plant Sci.

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Surface blooms of colony-forming Microcystis are increasingly occurring in aquatic ecosystems on a global scale. Recent studies have found that the Microcystis colonial morphology is a crucial factor in the occurrence, persistence, and dominance of Microcystis blooms, yet the mechanism driving its morphological dynamics has remained unknown. This study conducted a laboratory experiment to test the effect of extracellular polymeric substances on the morphological dynamics of Microcystis. Ultrasound was used to disaggregate colonies, isolating the cells and of the Microcystis suspension. The single cells were then re-cultured under three homologous EPS concentrations: group CK, group Low, and group High. The size, morphology, and EPS [including tightly bound EPS (TB-EPS), loosely bound EPS (LB-EPS), bound polysaccharides (B-polysaccharides), and bound proteins (B-proteins)] changes of colonies were closely monitored over a period of 2 months. It was observed that colonies were rapidly formed in group CK, with median colony size (D50) reaching 183 µm on day 12. The proportion of colonies with a size of 150–500 µm increased from 1% to more than 50%. Colony formation was also observed in both groups Low and High, but their D50 increased at a slower rate and remained around 130 µm after day 17. Colonies with a size of 50–150 µm account for more than 50%. Groups CK and Low successively recovered the initial Microcystis morphology, which is a ring structure formed of several small colonies with a D50 of 130 µm. During the recovery of the colony morphology, the EPS per cell increased and then decreased, with TB-EPS and B-polysaccharides constituting the primary components. The results suggest that colony formation transitioned from adhesion driven to being division driven over time. It is suggested that the homologous EPS released into the ambient environment due to the disaggregation of the colony is a chemical cue that can affect the formation of a colony. This plays an important but largely ignored role in the dynamics of Microcystis and surface blooms.

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“…The studies assessed the sorption exchange capacity (SOE, mg/g, mg-ion/g) in static mode (ion concentration 7.0±0.1 mg-ion/l, ratio of solid and liquid phases 1:10, particle size 0,8÷1.2 mm, sorption time 24 hours). Zeolite samples have significant sorption capacity not only for particularly toxic ions (Cd 2+, Pb 2+) but also for other heavy metals (Cu 2+, Zn 2+) [ [7], [8], [9]].…”

Section: Experimental Partmentioning

confidence: 99%

Natural mineral raw materials as granular filtering materials in industrial and waste water treatment

Myrzalieva,

Bagasharova,

Akilbekova

et al. 2024

Kompl. Ispolz. Min. Syra = Compl. Use of Min. Resour.

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Analysis of currently existing methods of natural and waste water treatment from heavy metals has shown that one of the most promising is the sorption method using natural inorganic materials as sorbents: zeolite, diatomite, and vermiculite. The relevance of the topic is dictated by the need to develop an original technology of wastewater treatment and water treatment, which allows constant monitoring of the level of pollution of natural waters by industrial wastewater from metallurgical enterprises. The proposed methods of sorbent modification create a basis for studying the structure, porosity, and sorption capabilities of the mentioned natural materials. All three minerals: zeolite, diatomite, and vermiculite belong to highly porous, structured materials, promising for use as stable sorption systems in water treatment and water purification. The influence of physical and chemical characteristics of natural sorbents and the application of new promising environmentally safe materials and reagents for water treatment are considered. The sorption of copper ions on natural zeolite material before and after its modification by hydrothermal method was investigated. The activity of sorbents was estimated by the value of sorption capacity, i.e. the amount of heavy metal ions absorbed by a unit mass of sorbent based on zeolite and its modified form.

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Peculiarities of adsorption of Cr (VI) ions on the surface of Chlorella vulgaris ZBS1 algae cells

Cited by 20 publications

References 81 publications

Removal of Hexavalent Chromium by Using Sustainable Green Materials as Low-Cost Adsorbents

Removal of Hexavalent Chromium by Using Sustainable Green Materials as Low-Cost Adsorbents

Effect of extracellular polymeric substances on the colony size and morphological changes of Microcystis

Natural mineral raw materials as granular filtering materials in industrial and waste water treatment

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