Synthesis of various layered double hydroxides using aluminum dross generated in aluminum recycling process

Murayama, Norihiro; Maekawa, Ikuo; Ushiro, Hiroyuki; Miyoshi, Takayuki; Shibata, Junji; Valix, Marjorie

doi:10.1016/j.minpro.2012.03.011

Cited by 87 publications

(36 citation statements)

References 16 publications

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“…Table II shows chemical compositions of the products and commercial hydrotalcite. As the HT has positive charged sites based on the Al 3+ in double hydroxide layer [21], the intercalated amount of anion should be theoretically equal to the Al 3+ amount in the HT. Namely, the amount of Al 3+ should be in accord with the anion exchange capacity of the HT.…”

Section: Removal Tests Of Phosphate and Nitratementioning

confidence: 99%

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Synthesis of Hydrotalcite from Bittern, and Its Removal Abilities of Phosphate and Nitrate

Wajima¹

2015

IJCEA

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Abstract-In this study, hydrotalcite was synthesized from bittern solution with addition of AlCl 3 (Mg/Al molar ratio of the solution = 3), and its removal abilities of phosphate and nitrate from aqueous solution were examined. Hydrotalcite can be synthesized from bittern and seawater, and the product from bittern is higher content of hydrotalcite than that from seawater. The product from bittern has a removal abilities of phosphate and nitrate, which were higher than commercial hydrotalcite. The equilibrium adsorption capacity of the product for phosphate and nitrate ions were measured and extrapolated using Langmuir and Freundlich isotherm models, and experimental data are found to fit Langmuir than Freundlich. In the solution with 1 mM of phosphate or nitrate ions, adsorption of phosphate on the product was saturated within 30 min and almost constant after 30 min, while that of nitrate increase within 15 min and then gradually decrease, due to the ion exchange reaction of chlorine and sulphate in the product.Index Terms-Hydrotalcite, bittern, removal of phosphorus and nitrate, anion exchange.

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Section: Removal Tests Of Phosphate and Nitratementioning

confidence: 99%

“…Extensive studies have been made on the method of preparation and the physicochemical properties of HT compounds [17]- [21].…”

mentioning

confidence: 99%

Synthesis of Hydrotalcite from Bittern, and Its Removal Abilities of Phosphate and Nitrate

Wajima¹

2015

IJCEA

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“…Around 5 million tons of aluminum dross is generated every year around the world [2]. Substantial amounts of the dross are discarded in landfills poisoning health, natural and security peril issues in light of its poisonous quality and high combustibility.…”

Section: Introductionmentioning

confidence: 99%

“…Aluminum (Al) dross can be classified as three types namely white, black and salt cake, depending on the amount of aluminum present and the morphology of the wastes [4]. The main components of the dross are metallic alumi-num, aluminum oxides, aluminum chlorides and oxide of transition metals [2]. Therefore, Al dross considers as valuable material and there is much legitimacy if the dross that is shaped could be "reused" as an engineering item for particular applications.…”

Section: Introductionmentioning

confidence: 99%

Characterization and Application of Aluminum Dross as Catalyst in Pyrolysis of Waste Cooking Oil

Kamil

Salmiaton

Shahruzzaman

et al. 2016

Bull. Chem. React. Eng. Catal.

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Aluminium dross, a waste material produced by dissolution of aluminum scrap, was characterized physically and chemically by various analysis techniques for a potential to be used as catalyst. Using catalyst from waste materials reduced the cost for synthesizing of new catalyst. An efficient catalyst derived from industrial solid waste was modified by acid washing for using in a pyrolysis of waste cooking oil. The modification of aluminum dross resulted in increased surface area (from 0.96 to 68.24 m 2 /g), acidity (from 315 to 748 µmol/g) and thermal stability. Pyrolysis waste cooking oil was used to test the performance of aluminum dross as catalyst before and after modification. The product analysis showed a better result than the unmodified material based on increased yield of bio-oil and improved selectivity.

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“…Our works have reported the preparation of LDHs synthesized from reagent and industrial by-products including aluminum dross, dust and steelmaking slag with anionic species including As, B, Cr, Se, P, organic carboxylates and anionic surfactants and their application in wastewater treatment [13][14][15][16][17][18][19][20][21][22][23] . However, the systematic kinetics and equilibrium adsorption testing required for the design of a removal unit and the quantitative evaluation of the selectivity of LDHs prepared have not been adequate.…”

Section: Introductionmentioning

confidence: 99%

Removal of Harmful Anions in Aqueous Solution with Various Layered Double Hydroxides

Murayama

Sakamoto

Shibata

et al. 2013

Resources Processing

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Four types of layered double hydroxides (LDHs) were synthesized by a co-precipitation method. The ability of various LDHs to remove anionic species including As(III), As(V), B, Cr(VI) and Se(IV) was investigated. Removal tests were performed primarily by a batch operation. The Cr(VI) removal was conducted by both batch and column studies. For the column removal tests, LDH pellets were prepared using a granulator and 5% poly-vinyl alcohol solution as binder.Among the LDHs tested, Mg-Al-NO 3 − LDH showed the optimal removal of anionic species, and it demonstrated excellent removal of As(V), Se(IV) and Cr(VI) particularly at the low anionic concentrations. The order of anionic removal by the LDHs is as follows; Mg-Al-NO 3 − LDH > Mg-AlCl − LDH >> Mg-Al-SO 4 2− LDH > Mg-Al-CO 3 2− LDH. The selective uptake of anion had the following order; As(V) > Se(IV) > Cr(VI) > As(III) > B. This study has demonstrated the uptake of harmful anions is influenced by the two specific factors, (1) the originally intercalated anions in the LDH, and (2) valency of anionic target species in aqueous solution. Column study also demonstrated that about 350 times Cr(VI) in solution per unit volume of LDH pellet can be removed, though this resulted in minor change in pH of the solution and greater NO 3 − elution. This study has revealed the ability of LDH to remove harmful anionic species and its practical application in wastewater treatment.

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Synthesis of various layered double hydroxides using aluminum dross generated in aluminum recycling process

Cited by 87 publications

References 16 publications

Synthesis of Hydrotalcite from Bittern, and Its Removal Abilities of Phosphate and Nitrate

Synthesis of Hydrotalcite from Bittern, and Its Removal Abilities of Phosphate and Nitrate

Characterization and Application of Aluminum Dross as Catalyst in Pyrolysis of Waste Cooking Oil

Removal of Harmful Anions in Aqueous Solution with Various Layered Double Hydroxides

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