Fabrication of hydroxyapatite/chitosan porous materials for Pb(<scp>ii</scp>) removal from aqueous solution

Lei, Yong; Guan, Junjie; Wei, Chen; Ke, Qinfei; Zhang, Changqing; Guo, Ya‐Jun

doi:10.1039/c5ra01628b

Cited by 70 publications

(34 citation statements)

References 57 publications

(53 reference statements)

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“…2) presents the absorption bands of hydroxyapatite, corresponding to vibrations of PO 4 and OH groups characteristic for HAP, and of OH groups from adsorbed water An example of TEM image (Fig.3) for the HAP sample in aqueous dispersion reveals acicular assemblies of particles, with a diameter of 15-20 nm. These dimensions are confirmed by the atomic force microscopy (AFM) images (an example is given in Fig.…”

Section: Hydroxyapatite Characterizationmentioning

confidence: 99%

“…The first order kinetic (Lagergren kinetic) would be described by the equation: (4) where x e is the sorbed amount at equilibrium, assumed to be the value at 960 min, and k 1 is the first order adsorption rate constant. …”

Section: Metal Ions Removal From Mine Wastewater Samplesmentioning

confidence: 99%

“…[6,27]) through the addition of non-toxic polymers, abundantly found in naturedextran [27], chitosan [4,38], carboxymethyl cellulose [26,36], alginate, gelatin [21]. However, these additions do tend to increase the manufacturing cost, thus making it difficult to translate from a laboratory level to an industrial one.…”

Section: Introductionmentioning

confidence: 99%

“…The presence of heavy metals in wastewater [1][2][3][4][5][6], resulting from mining operations, various manufacturing industries, leather tanning, paper production, fertilizers, photographic materials, explosives, is a major environmental concern. These elements can enter the human body both in a direct manner and following the food chain [7,8].…”

Section: Introductionmentioning

confidence: 99%

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Hydroxyapatite for removal of heavy metals from wastewater

Avram¹,

Frențiu²,

Horovitz³

et al. 2017

Studia UBB Chemia

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ABSTRACT. HAP powder of a low crystallinity and rather large specific surface area was synthesized by an environmentally friendly, cost effective precipitation method, and characterized by XRD, FTIR, and BET isotherms. TEM and AFM are used to envisage the surface of HAP nano particles, showing a high porosity of this ceramic powder. It was used for the removal of metals (Al, Cd, Co, Cr, Cu, Fe, Mn, Ni, Pb, and Zn) from mine wastewater. Metal contents in the initial and treated samples were quantified by inductively coupled plasma atomic emission spectrometry and high-resolution continuum source atomic absorption spectrometry. By the use of HAP, an efficient removal of all metals was ensured. The increase of Ca 2+ ions content in the treated water suggests an ion exchange mechanism.

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Section: Hydroxyapatite Characterizationmentioning

confidence: 99%

Section: Metal Ions Removal From Mine Wastewater Samplesmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Hydroxyapatite for removal of heavy metals from wastewater

Avram¹,

Frențiu²,

Horovitz³

et al. 2017

Studia UBB Chemia

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“…has been applied in the case of chemical adsorption. 35) Calculated values of q e(F) and k (F) from the plots of t versus t·q e(F)…”

Section: )27)mentioning

confidence: 99%

Effects of carbonate inclusion on fluoride ion removal by hydroxyapatite: A discussion from the viewpoint of hydroxyapatite dissolution

Terasaka

Kamitakahara

Yokoi

et al. 2016

J. Ceram. Soc. Japan

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Hydroxyapatite (HA) can be used for removing F ¹ . Materials containing HA for removing F ¹ can be obtained from biological wastes, and these HA might contain carbonate ions. The dissolution behavior of HA should affect the F ¹ removal as fluorapatite (FA) formation at HA surface by the dissolution of HA and subsequent precipitation of FA results in the removal of F ¹ . In this study, we examined the relationship between the dissolution and F ¹ removal rates of carbonated HA (CHA). CHA samples with different carbonate contents were prepared by a hydrothermal process. The dissolution and F ¹ removal rates were investigated by immersing the samples in pH 5 and 7 buffer solutions in the absence and presence of F ¹ , respectively. The dissolution and F ¹ removal rates were increased with an increase of carbonate-ion content in the samples. Dissolution and F ¹ removal rates at pH 5 were larger than that at pH 7. The pseudo-second order kinetic model provides a good fit for the F ¹ removal process. An increase in the kinetic constant of dissolution decreases the kinetic constant of the F ¹ removal process for samples with high carbonate contents at pH 5.

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Preparation and Application of the Composite from Chitosan

Chen

2017

Handbook of Composites From Renewable Materials

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Fabrication of hydroxyapatite/chitosan porous materials for Pb(ii) removal from aqueous solution

Abstract: Hydroxyapatite/chitosan porous materials are fabricated by a freeze-drying method for Pb(ii) removal from aqueous solution.

Cited by 70 publications

References 57 publications

Hydroxyapatite for removal of heavy metals from wastewater

Hydroxyapatite for removal of heavy metals from wastewater

Effects of carbonate inclusion on fluoride ion removal by hydroxyapatite: A discussion from the viewpoint of hydroxyapatite dissolution

Preparation and Application of the Composite from Chitosan

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