Montmorillonite–Cu(II)/Fe(III) oxides magnetic material for removal of cyanobacterial Microcystis aeruginosa and its regeneration

Gao, Zhengwen; Peng, Xianjia; Zhang, Hongmei; Luan, Zhaokun; Fan, Bin

doi:10.1016/j.desal.2008.10.006

Cited by 41 publications

(15 citation statements)

References 11 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…However, the common disadvantage of Fe3O4 NPs is its decrease of surface charge at neutral and alkaline pH conditions [18]. Gao et al (2009) developed montmorillonite-Cu(II)/Fe(III) for the harvesting of Microcystis aeruginosa, but the harvesting efficiencies still decreased at high pH values [24]. Ge et al (2015) overcame the limitation of Fe3O4 NPs by coating polyethylenimine (PEI) on the surface of Fe3O4 NPs.…”

Section: Discussionmentioning

confidence: 99%

Magnesium Aminoclay-Fe3O4 (MgAC-Fe3O4) Hybrid Composites for Harvesting of Mixed Microalgae

et al. 2018

View full text Add to dashboard Cite

In this paper, we describe the synthesis of magnesium aminoclay-iron oxide (MgAC-Fe 3 O 4) hybrid composites for microalgae-harvesting application. MgAC-templated Fe 3 O 4 nanoparticles (NPs) were synthesized in different ratios of MgAC and Fe 3 O 4 NPs. The uniform distribution of Fe 3 O 4 NPs in the MgAC matrix was confirmed by transmission electron microscopy (TEM). According to obtained X-ray diffraction (XRD) patterns, increased MgAC loading leads to decreased intensity of the composites' (311) plane of Fe 3 O 4 NPs. For harvesting of Chlorella sp. KR-1, Scenedesmus obliquus and mixed microalgae (Chlorella sp. KR-1/ Scenedesmus obliquus), the optimal pH was 4.0. At higher pHs, the microalgae-harvesting efficiencies fell. Sample #1, which had the highest MgAC concentration, showed the most stability: the harvesting efficiencies for Chlorella sp. KR-1, Scenedesmus obliquus, and mixed microalgae were reduced only to~50% at pH = 10.0. The electrostatic interaction between MgAC and the Fe 3 O 4 NPs in the hybrid samples by microalgae, as confirmed by zeta potential measurements, were attributed to the harvesting mechanisms. Moreover, the zeta potentials of the MgAC-Fe 3 O 4 hybrid composites were reduced as pH was increased, thus diminishing the microalgae-harvesting efficiencies.

show abstract

Section: Discussionmentioning

confidence: 99%

Magnesium Aminoclay-Fe3O4 (MgAC-Fe3O4) Hybrid Composites for Harvesting of Mixed Microalgae

et al. 2018

View full text Add to dashboard Cite

show abstract

“…taste, turbidity and odor. The methods used for algae removal include centrifugation, microstraining, coagulation, in-pond chemical precipitation, filtration, flotation and ion exchange (Bitton et al, 1975;Gao et al, 2009).…”

Section: Removal Of Microalgal Biomassmentioning

confidence: 99%

Magnetically modified microalgae and their applications

Šafařı́k

Procházková

Pospíšková

et al. 2015

Critical Reviews in Biotechnology

View full text Add to dashboard Cite

The majority of algal cells can interact with a wide range of nano- and microparticles. Upon interaction the modified cells usually maintain their viability and the presence of foreign material on their surfaces or in protoplasm can provide additional functionalities. Magnetic modification and labeling of microalgal biomass ensures a wide spectrum of biotechnological, bioanalytical and environmental applications. Different aspects of microalgal cell magnetic modification are covered in the review, followed by successful applications of magnetic algae. Modified cells can be employed during their harvesting and removal, applied in toxicity microscreening devices and also as efficient adsorbents of different types of xenobiotics.

show abstract

“…The use of Nano-Fe 3 O 4 has great practical value in other applications (as shown in Table 4). In addition, to the water environment, a number of studies had shown that Nano-Fe 3 O 4 can effectively remove heavy metals from sewage and also remove organic, inorganic compounds, dyes, algae [132] and other environmental pollutants in water. Ito et al [133] studied the effect of ZrFe 2 (OH) 8 as adsorbent on phosphorus removal in wastewater.…”

Section: Othersmentioning

confidence: 99%

Preparation and Potential Applications of Super Paramagnetic Nano-Fe3O4

et al. 2018

View full text Add to dashboard Cite

Ferroferric oxide nanoparticle (denoted as Nano-Fe 3 O 4 ) has low toxicity and is biocompatible, with a small particle size and a relatively high surface area. It has a wide range of applications in many fields such as biology, chemistry, environmental science and medicine. Because of its superparamagnetic properties, easy modification and function, it has become an important material for addressing a number of specific tasks. For example, it includes targeted drug delivery nuclear magnetic resonance (NMR) imaging in biomedical applications and in environmental remediation of pollutants. Few articles describe the preparation and modification of Nano-Fe 3 O 4 in detail. We present an evaluation of preparation methodologies, as the quality of material produced plays an important role in its successful application. For example, with modification of Nano-Fe 3 O 4 , the surface activation energy is reduced and good dispersion is obtained.

show abstract

Montmorillonite–Cu(II)/Fe(III) oxides magnetic material for removal of cyanobacterial Microcystis aeruginosa and its regeneration

Cited by 41 publications

References 11 publications

Magnesium Aminoclay-Fe3O4 (MgAC-Fe3O4) Hybrid Composites for Harvesting of Mixed Microalgae

Magnesium Aminoclay-Fe3O4 (MgAC-Fe3O4) Hybrid Composites for Harvesting of Mixed Microalgae

Magnetically modified microalgae and their applications

Preparation and Potential Applications of Super Paramagnetic Nano-Fe3O4

Contact Info

Product

Resources

About