Gellan gel beads containing magnetic nanoparticles: An effective biosorbent for the removal of heavy metals from aqueous system

Wang, Xia; Zhao, Chuanming; Zhao, Peng; Dou, Peipei; Ding, Yi; Xu, Ping

doi:10.1016/j.biortech.2008.10.042

Cited by 68 publications

(28 citation statements)

References 12 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Dividing the saturation value of the sample by the saturation magnetization of maghemite (taken here at 60 emu/g to take into account the reduction of ms observed for nanoparticles compared to bulk) yields a weight fraction w $ 54% in agreement with estimates from chemical titration. For comparison, similar values although weaker are found in the literature [14,20]. Extraction of a susceptibility from a linear fit of magnetization vs. field in the low field region [À100 Oe- 100 Oe] gives a value of 0.048 emu/g/Oe.…”

Section: Characterization Of Magsorbentsupporting

confidence: 62%

“…The electrostatic interactions become attractive and may favour positively charged Pb(II) ions in the solution from approaching the magsorbent for adsorption to take place. Several papers have reported similar effects of pH on metal adsorption [8,20,27]. The Fig.…”

Section: Effect Of Phmentioning

confidence: 87%

“…Monier et al [8] have studied magnetic chelating resin based on chitosan for adsorption of Cu(II), Co(II) and Ni(II). Gellan gel beads containing nanoparticles were prepared by Wang et al for the removal of heavy metals from aqueous aqueous [20]. These magsorbents can be quickly recovered from the medium and easily manipulated with an external magnetic field.…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Magnetic alginate beads for Pb(II) ions removal from wastewater

Bée

Talbot

Abramson

et al. 2011

Journal of Colloid and Interface Science

134

View full text Add to dashboard Cite

Section: Characterization Of Magsorbentsupporting

confidence: 62%

Section: Effect Of Phmentioning

confidence: 87%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Magnetic alginate beads for Pb(II) ions removal from wastewater

Bée

Talbot

Abramson

et al. 2011

Journal of Colloid and Interface Science

134

View full text Add to dashboard Cite

“…Furthermore, magnetic Fe 3 O 4 nanoparticles are superparamagnetic with a large surface area, which reduces the mass transfer resistance in traditional immobilization processes (Wang et al 2007). Such magnetic materials are widely used in various fields, such as drug delivery and biosensing, environmental remediation, and ferrofluid-based processes (Wang et al 2007(Wang et al , 2009Yang et al 2014). However, using magnetic nanoparticle-immobilized cells to produce reuterin has rarely been reported.…”

Section: Introductionmentioning

confidence: 98%

Efficient production of reuterin from glycerol by magnetically immobilized Lactobacillus reuteri

Liu

2015

Appl Microbiol Biotechnol

View full text Add to dashboard Cite

Reuterin is a compound that contains the monomeric, hydrated monomeric, and cyclic dimeric forms of 3-hydroxypropionaldehyde (3-HPA). It is widely used as a food preservative due to its antimicrobial properties, and 3-HPA is also an important precursor for several industrial chemicals. In this study, we first developed an efficient immobilization process involving magnetic cell entrapment for production of reuterin from glycerol by Lactobacillus reuteri. The cell growth condition was optimized by statistical approaches. High conversion efficiency was achieved using k-carrageenan as the immobilization support and Fe3O4 as magnetic nanoparticles. Furthermore, addition of 0.02 g/L vitamin B12, 10 mmol/L Mg(2+), and glucose in a molar ratio of 0.15 to glycerol significantly increased the conversion rate. Under optimal conditions, 235.9 mmol/L 3-HPA was produced from 250 mmol/L initial glycerol in 1.5 h, with a molar yield of 94.4 % and a productivity of 15.4 mmol/(g dry cell weight∙L∙h), which were the highest values to date. Thus, this study demonstrated a promising process for the improvement of biocatalyst efficiency in biotransformation.

show abstract

“…Due to the developments in nanotechnology, nanomaterials have been tested for the removal of heavy metals from waters because of their high specific surface area and adsorption capabilities. Magnetic Fe oxide nanoparticles show promise as an efficient material for removing metal pollutants and a high possibility of re-use through magnetic separation with ion exchange [4]. The synthesis of such magnetic nanoparticles can be done through various methods including: co-precipitation, solgel synthesis, sonochemical reactions, hydrothermal reactions, flow injection synthesis and electrospray synthesis [4].…”

Section: Introductionmentioning

confidence: 99%

Comparison on depollution capabilities of two iron based magnetic nanopowders

Pantilimon¹,

Predescu²,

Vidu³

et al. 2016

ARA 40th Congress Proceedings

View full text Add to dashboard Cite

Abstract:Removal of toxic metals from waste waters is one of the main concerns for environmental protection due to the high toxicity combined with their very long life span and slow biodegradability. Heavy metals such as Cr (VI) are very hazardous to the health of humans, flora and fauna because once they are absorbed into a living organism they are eliminated very slowly and become part of the food chain. The removal of such toxic materials has been tested through the use of magnetic nanoparticles in order to obtain a clean depollution of waste water. The comparison of two such materials, magnetite and maghemite was presented. The synthesis procedure for both materials was compared, their morphologies analyzed by XRD, TEM and SAED and their adsorption capabilities were evaluated at various pH values. The purpose of this study was to determine the differences in performance of the two magnetic nanopowders in terms of Cr (VI) removal from waste waters.

show abstract

Gellan gel beads containing magnetic nanoparticles: An effective biosorbent for the removal of heavy metals from aqueous system

Cited by 68 publications

References 12 publications

Magnetic alginate beads for Pb(II) ions removal from wastewater

Magnetic alginate beads for Pb(II) ions removal from wastewater

Efficient production of reuterin from glycerol by magnetically immobilized Lactobacillus reuteri

Comparison on depollution capabilities of two iron based magnetic nanopowders

Contact Info

Product

Resources

About