Removal of phosphate by aluminum oxide hydroxide

Tanada, Seiki; Kabayama, Mineaki; Kawasaki, Naohito; Sakiyama, Toru; Nakamura, Takeo; Araki, Mamiko; Tamura, Takamichi

doi:10.1016/s0021-9797(02)00008-5

Cited by 347 publications

(161 citation statements)

References 9 publications

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“…The phosphate-modified alumina was prepared by immersion of an electrogenerated alumina into a 4 mM NaH 2 PO 4 solution. During this immersion the alumina surface was modified thanks to an efficient phosphate adsorption [23].…”

Section: Structure Of the Investigated Adsorbentsmentioning

confidence: 99%

Cetylpyridinium removal using phosphate-assisted electrocoagulation, electroreduction and adsorption on electrogenerated sorbents

Flilissa

Méléard

Darchen

2016

Chemical Engineering Journal

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Section: Structure Of the Investigated Adsorbentsmentioning

confidence: 99%

Cetylpyridinium removal using phosphate-assisted electrocoagulation, electroreduction and adsorption on electrogenerated sorbents

Flilissa

Méléard

Darchen

2016

Chemical Engineering Journal

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“…The adsorption-desorption of phosphate on aluminum hydroxides and oxides has been the subject of intense study for decades [5][6][7][8][9][10]. Some of the studies aimed at a better understanding of the adsorption mechanisms of strongly bound anions on aluminum (hydr)oxides.…”

Section: E-mail Address: Wgds@rceesaccn (D Wang)mentioning

confidence: 99%

“…The surface charge, Q H (mol L −1 ), was calculated directly from the measured pH and the amount of acid or base added at each data point [9,10] as follows: where C A and C B (mol L −1 ) were the concentrations of acid and base added to the suspension, respectively. Since the titration procedure was finished within 5 h and in the moderate pH domain (4-10), the dissolution of the samples were negligible (Fig.…”

Section: Potentiometric Titrationsmentioning

confidence: 99%

Adsorption of phosphate at the aluminum (hydr)oxides–water interface: Role of the surface acid–base properties

Yang

Wang

Sun

et al. 2007

Colloids and Surfaces A: Physicochemical and Engineering Aspect

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In this paper, the adsorption of phosphate on two crystallized aluminum oxides, pseudo-boehmite (pseudo-␥-AlOOH) and ␣-Al 2 O 3 , was studied. The adsorption experiments were carried out in 0.01 M KNO 3 solutions at pH 4 and 6, respectively. Adsorption densities were calculated to evaluate the phosphate adsorption affinity for the two aluminum oxides. To better understand the effect of surface properties on the adsorption behavior of phosphate, the surface structure and properties were investigated with X-ray diffraction, N 2 adsorption-desorption, electron microscope observation and surface acid-base titrations. The results from adsorption isotherms showed that at both pH 4 and 6, pseudo-␥-AlOOH exhibited greater adsorption capacity than ␣-Al 2 O 3 . For both pseudo-␥-AlOOH and ␣-Al 2 O 3 , the adsorbed amount of phosphate at pH 4 was higher than that at pH 6. Adsorption density calculation indicated that ␣-Al 2 O 3 had greater affinity for phosphate than pseudo-␥-AlOOH. Information gained from examinations of surface properties revealed that the specific surface area played an important role on adsorption capacity, while the acidity of surface aluminol groups evaluated from acid-base titration curves contributed more to adsorption affinity and consequently the adsorption density.

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“…19), 20) In Japan, various harmful anions in wastewater such as nitrate, nitrite and fluoride, as well as phosphate are regulated by Water Pollution Control Law (Law number 138 of 1970) proclaimed by the Ministry of the Environment, Government of Japan. It should be noted that the regulated value for aqueous fluoride was revised in 2007 from 15-50 mg/L to 8 mg/L, indicating that candidate removal reagent should be examined as soon as possible for their ability to remove aqueous fluoride.…”

Section: Introductionmentioning

confidence: 99%

Effects of several harmful anions on the removal of aqueous phosphate by boehmite

Sugiyama

Inaba

Manabe

et al. 2008

J. Ceram. Soc. Japan

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Boehmite (Al(OH)O) was employed for the removal of aqueous phosphate in the presence of harmful anions such as carbonate, sulphate, nitrate, nitrite, chloride and fluoride at 298 K. Although boehmite was shown to remove a certain simultaneous removal of phosphate together with fluoride, no influence of the presence of carbonate, sulphate, nitrate, nitrite and chloride on the removal of phosphate by boehmite was observed. In the present study, two kinds of boehmite, a commercially available form and boehmite prepared using a sol-gel technique, were employed for the simultaneous removal of phosphate and fluoride, and it was found that the latter form was superior for such removal. Solid-state 31 P MAS NMR analyses revealed that, in the presence of fluoride, phosphate was removed onto boehmite as different types of phosphate species, depending on the solution pH and the source of boehmite.

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Removal of phosphate by aluminum oxide hydroxide

Cited by 347 publications

References 9 publications

Cetylpyridinium removal using phosphate-assisted electrocoagulation, electroreduction and adsorption on electrogenerated sorbents

Cetylpyridinium removal using phosphate-assisted electrocoagulation, electroreduction and adsorption on electrogenerated sorbents

Adsorption of phosphate at the aluminum (hydr)oxides–water interface: Role of the surface acid–base properties

Effects of several harmful anions on the removal of aqueous phosphate by boehmite

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