Adsorption of Ni2+, Cd2+, PO43− and NO3− from aqueous solutions by nanostructured microfibrillated cellulose modified with carbonated hydroxyapatite

Hokkanen, Sanna; Repo, Eveliina; Westholm, Lena Johansson; Lou, Song; Sainio, Tuomo; Sillanpää, Mika

doi:10.1016/j.cej.2014.04.101

Cited by 130 publications

(71 citation statements)

References 33 publications

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“…Calcium hydroxyapatite (CHA) is a Page 4 of 22 natural, non-toxic material, and it is a member of apatite mineral family, with the formula of Ca 10 (PO 4 ) 6 (OH) 2 . Accordingly CHA nanostructures can effectively interact with the cellulose structures, resulting in the enhancement of properties of their nanocomposites due to the small size and high specific surface area [19].…”

Section: Introductionmentioning

confidence: 99%

Calcium hydroxyapatite microfibrillated cellulose composite as a potential adsorbent for the removal of Cr(VI) from aqueous solution

Hokkanen

Bhatnagar

Repo

et al. 2016

Chemical Engineering Journal

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234

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Section: Introductionmentioning

confidence: 99%

Calcium hydroxyapatite microfibrillated cellulose composite as a potential adsorbent for the removal of Cr(VI) from aqueous solution

Hokkanen

Bhatnagar

Repo

et al. 2016

Chemical Engineering Journal

Self Cite

234

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“…The Sips model is a combination of Langmuir and Freundlich isotherms [16], which takes the following form:…”

Section: Adsorption Isotherms and Adsorption Thermodynamics Analysismentioning

confidence: 99%

Adsorption Removal of Inhibiting Compounds by Modified Activated Carbon

Ma¹

2017

JENR

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Abstract:The effects of modification on the surface properties and inhibiting compounds (formic acid, acetic acid, 5-hydroxymethylfurfural and furfural) removal performance of activate carbon (AC) were investigated. The raw and modified ACs were characterized, the result showed that the surface chemistries of the modified ACs were significant changed, but only the porous structure of modified by HNO 3 were slightly damaged, and the others no obvious change. The formic acid and acetic acid removal performance of modified AC had a certain amount of improvement compared to the raw AC, but it is still relatively low (15% and 14%), so AC adsorption is not suitable for removal formic acid and acetic acid. And the 5-hydroxymethylfurfural (5-HMF) and furfural removal performance of modified AC by ZNCl 2 is good (89% and 81%). the process of adsorption of 5-HMF and furfural by activated carbon belongs to the process of exothermic physical adsorption and is the entropy reduction process. The adsorption is best carried out at low temperature.

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“…In this connection, hydroxyapatite (HAP), with nominal composition Ca 10 (PO 4 ) 6 (OH) 2 , can be considered as valuable candidate for supporting material due to its bio-compatibility and excellent adsorption properties toward diverse water pollutants (Azzaoui et al 2014;Hokkanen et al 2014). Meanwhile, HAP was recognized for its high potential in trapping and retention of toxic heavy metals (Liu et al 2013;Xie et al 2013;Zhao et al 2014b) and photocatalytic decomposition of toxic organic materials (Bouyarmane et al 2013;Wei et al 2014) in polluted water.…”

Section: Introductionmentioning

confidence: 99%

Photodegradation of odorous 2-mercaptobenzoxazole through zinc oxide/hydroxyapatite nanocomposite

et al. 2014

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In this study, ZnO/HAP nanocomposite with excellent photocatalytic activities was successfully synthesized by sol-gel method and used for degradation of 2-mercaptobenzoxazole (MBO) as model of odorous mercaptan compound in water. To optimize the performance of ZnO/ HAP photocatalytic capabilities, ZnO/HAP loading (0.05-0.3 g/L), irradiation time (15-180 min), pH (3-11) and initial concentration of MBO (10-100 ppm) were investigated. At neutral pH of 7, the highest amount of the MBO (99.45 %) was degraded by ZnO/HAP nanocomposite through photocatalytic oxidation process within 2 h of irradiation time. ). TEM image demonstrated a spherical shape structure of ZnO/HAP with average particle size of 25 nm in diameter. The XRD patterns revealed the principal components of ZnO/HAP including HAP and ZnO. FTIR spectrum results supported formation ZnO and HAP by their stretching mode in composite. Comparison of photocatalytic activity of ZnO/HAP with pure ZnO and HAP nanoparticles had clearly recognized that latter is the most active photocatalyst in the degradation of MBO using UV light as source energy. The reason for greater activity of ZnO/HAP was due to its larger specific surface area (182.36 m

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Adsorption of Ni2+, Cd2+, PO43− and NO3− from aqueous solutions by nanostructured microfibrillated cellulose modified with carbonated hydroxyapatite

Cited by 130 publications

References 33 publications

Calcium hydroxyapatite microfibrillated cellulose composite as a potential adsorbent for the removal of Cr(VI) from aqueous solution

Calcium hydroxyapatite microfibrillated cellulose composite as a potential adsorbent for the removal of Cr(VI) from aqueous solution

Adsorption Removal of Inhibiting Compounds by Modified Activated Carbon

Photodegradation of odorous 2-mercaptobenzoxazole through zinc oxide/hydroxyapatite nanocomposite

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