Feasibility and comparative analysis of cadmium biosorption by living scenedesmus obliquus FACHB-12 biofilms

Ma, Xiangmeng; Xin, Yan; Yao, Jinjie; Zheng, Simi; Wei, Qun

doi:10.1016/j.chemosphere.2021.130125

Cited by 24 publications

(4 citation statements)

References 37 publications

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“…An example is a province in southwest China, where there are a lot of mining and smelting industries. This has caused an increase in heavy metal pollution, especially cadmium pollution, over the past decade [2]. Due to its high toxicity and potential environmental problems, it is important to find an adequate solution for the removal of cadmium from industrial wastewaters.…”

Section: Introductionmentioning

confidence: 99%

A Mechanism Assessment and Differences of Cadmium Adsorption on Raw and Alkali-Modified Agricultural Waste

et al. 2022

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In this study, raw corn silk was considered for the removal of cadmium ions from aqueous solutions. In order to improve adsorption characteristics, the KOH treatment was applied as a route to obtain modified materials. Both materials before and after metal adsorption were characterized by pHPZC, SEM-EDX and FTIR analysis. SEM images and FTIR spectra revealed that alkali modification caused some structural changes that could improve the adsorption properties of the investigated material. The experimental results and the ion-exchange study revealed that the biosorption process of cadmium ions on to raw and modified corn silk was caused predominantly by the ion-exchange mechanism, followed by chemisorption. The kinetic parameters implied that there are three stages in the biosorption process. In addition, the cadmium adsorption on both materials is very fast and is followed by the pseudo-second-order kinetic model. The experimental results were fitted by two and three parameter isotherm models, while the Sips isotherm model best describes the biosorption process on both materials. According to the Sips isotherm model, the maximum adsorption capacity of cadmium adsorbed on modified materials was 49.06 mg g−1, which is 2.23 times greater in comparison to the raw material (21.96 mg g−1). Furthermore, the mechanisms of cadmium adsorption onto the investigated materials are summarized in order to better understand the modification influence on the adsorption properties of corn silk. In order to examine reusability of the investigated material, diluted nitric acid was used for regeneration. A desorption study was performed in three adsorption-desorption cycles. A high desorption efficiency (˃85%) indicated that MCS after Cd adsorption can be efficiently recovered and reused for a new adsorption cycle.

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Section: Introductionmentioning

confidence: 99%

A Mechanism Assessment and Differences of Cadmium Adsorption on Raw and Alkali-Modified Agricultural Waste

et al. 2022

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“…In this sense, microalgal biomass is considered an excellent alternative to be used in this technology. This biomass can be used alive or dead [ 9 ], with little or no modification [ 10 ], it can be efficiently immobilized on various matrices [ 11 ] and used in biotechnological processes (both immobilized and free), its production is low-cost, and at the same time, other benefits such as CO 2 fixation [ 12 ] or the production of biofuels [ 13 ] can be obtained. The evaluation of this type of biomass to be used efficiently in biosorption processes is a current topic.…”

Section: Introductionmentioning

confidence: 99%

Efficient Removal of Methylene Blue Using Living Biomass of the Microalga Chlamydomonas moewusii: Kinetics and Equilibrium Studies

Seoane

Santaeufemia

Abalde

et al. 2022

IJERPH

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The efficiency of the living biomass of the microalga Chlamydomonas moewusii in removing methylene blue dye is determined. The kinetics, equilibrium isotherms, and the effects on this process of the pH, contact time, and initial concentration of the dye are studied. Fourier transform infrared spectrometry and point of zero charge are used to characterize the biomass and explore the process. The maximum removal capacity derived from the Langmuir isotherm is 212.41 ± 4.55 mg/g after 7 h of contact time at pH 7. The removal process is rapid because kinetic studies revealed that the best fit of the data is with pseudo-third-order kinetics. The removal efficiency is dependent on the pH; as the pH increased, the efficiency is higher. These results show that the living biomass of this microalga is a very efficient biosorbent and therefore very suitable for the removal of methylene blue from aqueous solutions.

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“…are well known for their adaptability to different conditions and culture mediums. Toxicity studies suggest that they are able to tolerate a wide range of heavy metals; such as up to 200 ppm Pb 64 , 10 ppm Cr 65 , 100 ppm As 66 , 20 ppm Cd 67 , 5 ppm Ba 68 , and 0.0385 ppm Ag 69 . Growth under these conditions is limited, but possible.…”

Section: Resultsmentioning

confidence: 99%

Potential use of sludge from El Ferrol Bay (Chimbote, Peru) for the production of lipids in the culture of Scenedesmus acutus (Meyen, 1829)

Merino,

Mendoza,

Carhuapoma-Garay

et al. 2024

Sci Rep

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Despite the extensive development of microalgae biotechnology, it still requires new methodologies to lower production costs, especially in the field of biofuel production. Therefore, innovative methods that facilitate operations and enable cost-effective production are important in driving this industry. In this study, we propose a new low-cost and easy-to-use procedure, addressed to the generation of a culture medium for Scenedesmus acutus. The medium was obtained by thermal reduction of a sludge sample from El Ferrol Bay (Chimbote, Peru), whereby we obtained an aqueous medium. Our results indicated that the aqueous medium incorporates all necessary nutrients for microalgae production; allowing a maximum biomass of 0.75 ± 0.07 g/L with 60% of the medium; while high lipids production (59.42 ± 6.16%) was achieved with 20%. Besides, we quantified, in the experimental medium and at the end of the cultures, the levels of inorganic nutrients such as ammonium, nitrites, nitrates, and phosphates; in addition to COD and TOC, which were significantly reduced ($$p<$$ p < 0.05) after 7 days of culture, mainly in the treatment with 20%. These results suggest tremendous potential for sludge reuse, which also entails a cost reduction in microalgae biomass production, with additional positive impacts on large-scale application over highly polluted environments.

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Feasibility and comparative analysis of cadmium biosorption by living scenedesmus obliquus FACHB-12 biofilms

Cited by 24 publications

References 37 publications

A Mechanism Assessment and Differences of Cadmium Adsorption on Raw and Alkali-Modified Agricultural Waste

A Mechanism Assessment and Differences of Cadmium Adsorption on Raw and Alkali-Modified Agricultural Waste

Efficient Removal of Methylene Blue Using Living Biomass of the Microalga Chlamydomonas moewusii: Kinetics and Equilibrium Studies

Potential use of sludge from El Ferrol Bay (Chimbote, Peru) for the production of lipids in the culture of Scenedesmus acutus (Meyen, 1829)

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