An efficient approach for Pb(II) and Cd(II) removal using manganese dioxide formed in situ

Qin, Qingdong; Wang, Qianqian; Fu, Dafang; Ma, Jun

doi:10.1016/j.cej.2011.05.066

Cited by 165 publications

(61 citation statements)

References 54 publications

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“…Therefore, it is an important factor that impacts the adsorption of metals [23][24]. The variation in the adsorption capacity of Cd(II) by loess and biochar-amended loess with a changing initial solution pH is shown in Fig.…”

Section: Effect Of Solution Ph On Adsorption Capacitymentioning

confidence: 99%

Effect of Sludge Biochars Obtained at Different Pyrolysis Temperatures on the Adsorption of Cd(II)by Loess in Northwestern China

Dai¹,

Ren²,

Tao³

et al. 2017

Pol. J. Environ. Stud.

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Section: Effect Of Solution Ph On Adsorption Capacitymentioning

confidence: 99%

Effect of Sludge Biochars Obtained at Different Pyrolysis Temperatures on the Adsorption of Cd(II)by Loess in Northwestern China

Dai¹,

Ren²,

Tao³

et al. 2017

Pol. J. Environ. Stud.

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“…Nano manganese oxide (NMO) is a good alternative sorbent due to its high affinity for metal ions and its chemical, thermal, and radiation stabilities (Qin et al 2011;Hua et al 2012;Alabdullah et al 2013;Dyer et al 2000a). NMO is commonly synthesized by hydrothermal method and its crystal structure, surface area, and morphology are closely related to the favorable ion exchange and molecular interaction properties (Kang et al 2011).…”

Section: Introductionmentioning

confidence: 99%

“…The traditional liquid-liquid extraction has numerous disadvantages such as the use of toxic or flammable solvents, the formation of emulsions, and the generation of large volumes of secondary hazardous wastes (Mukherjee et al 2013). On the other hand, solid-phase extraction is one of the most preferred methods due to its simplicity, high efficiency, reliability, cost effectiveness, and the ability to achieve high enrichment factors (Qin et al 2011). Consequently, efforts have been devoted to the development of sorbents, which are cheap, easily available, and which can be readily and inexpensively regenerated (Awual et al 2014;Borai et al 2009;Hua et al 2012;Huo and Xiao 2014;Yin et al 2011Yin et al , 2015Yin and Zhu 2016).…”

Section: Introductionmentioning

confidence: 99%

Adsorption of Cesium, Cobalt, and Lead onto a Synthetic Nano Manganese Oxide: Behavior and Mechanism

Abdullah

Lafi

Masri

et al. 2016

Water Air Soil Pollut

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Synthesis parameters of nano manganese oxide (NMO) were tuned in order to maximize Cs and Co sorption efficiencies. The prepared oxide was characterized using various techniques including x-ray diffraction (XRD), Fourier transform infrared spectroscopy (FT-IR), SEM, and surface area analyzer. The sorption characteristics with respect to uptake of Cs, Co, and Pb were evaluated. An α − phase nano manganese oxide with a surface area of 165 m 2 g −1 was synthesized. Maximum adsorption capacities were 230 mg g −1 for Pb 2+ , 73 mg g −1 for Cs + , and 26 mg g −1 for Co 2+ . The intraparticle diffusion was the rate-limiting step in the case of Pb 2+ , whereas both intra-particle diffusion and film diffusion contribute to the rate-determining step in the adsorption process in the case of Cs + and Co 2+ . FT-IR analyses reveled that Cs + and Co 2+ coordinated to vacancy sites of NMO as inner-sphere complexes, while Pb 2+ formed bidentate corner-sharing complexes. NMO had high affinity for Pb 2+ but was also effective for sorption of Cs + and Co 2+ over a wide pH range, even in the presence of Na + . HCl (0.5 mol L −1 ) solution could regenerate the adsorbent successfully, and the NMO could be efficiently reused with lower production of residues. Thus, the prepared NMO can be efficiently used in wastewater treatment in terms of high adsorption capacity, easy availability, and low cost.

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“…Adsorventes nanoestruturados baseados em óxidos de manganês têm sido amplamente investigados para adsorção de íons tóxicos como chumbo, cádmio, níquel e zinco do meio aquoso [3,4]. Esses adsorventes destacam-se por elevada remoção desses íons quando comparada aos outros adsorventes, devido a sua elevada área superficial, estrutura microporosa com tamanho e forma dos poros bem definidos e os grupos funcionais OH capazes de reagir com os metais e outros íons especificamente.…”

Section: Introductionunclassified

Síntese e caracterização de compósito magnético nanoestruturado contendo óxido de manganês para remoção de íons Cd(II) do meio aquoso

et al. 2014

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ResumoO tratamento de efluentes contendo cádmio é de grande interesse devido à persistência desse contaminante no meio ambiente e às graves doenças que pode causar ao homem. No presente trabalho, foi utilizado o compósito magnético Mn 3 O 4 /Fe 3 O 4 como adsorvente do íon cádmio (II) em meio aquoso. O material adsorvente foi sintetizado e caracterizado segundo as técnicas de difração de raios X (DRX), espectroscopia Raman, microscopia eletrônica de transmissão e sorção de N 2 (BET). Ênfase foi dada à quantificação das fases do compósito pela análise de DRX combinada ao método Rietveld. O estudo de adsorção foi realizado variando o pH do meio e a concentração do íon cádmio em solução. A análise dos resultados possibilitou verificar que a remoção de Cd(II) utilizando compósito magnético Mn 3 O 4 /Fe 3 O 4 em meio aquoso é dependente do pH duplicando a medida que o pH varia de 3 para 7. O estudo de imobilização do íon contaminante em solução apresentou valores significativos de capacidade máxima de adsorção, de 12,3 mg Cd /g no pH 6 e 13,6 mg Cd /g no pH 7, indicando uma remoção de até 98% para concentrações baixas do íon, sugerindo que o adsorvente apresenta elevado potencial para remoção de Cd(II) em meio aquoso. Palavras-chave: adsorção, compósito magnético, cádmio. Abstract The treatment of wastewater containing cadmium is of great interest because of its persistence in the environment

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An efficient approach for Pb(II) and Cd(II) removal using manganese dioxide formed in situ

Cited by 165 publications

References 54 publications

Effect of Sludge Biochars Obtained at Different Pyrolysis Temperatures on the Adsorption of Cd(II)by Loess in Northwestern China

Effect of Sludge Biochars Obtained at Different Pyrolysis Temperatures on the Adsorption of Cd(II)by Loess in Northwestern China

Adsorption of Cesium, Cobalt, and Lead onto a Synthetic Nano Manganese Oxide: Behavior and Mechanism

Síntese e caracterização de compósito magnético nanoestruturado contendo óxido de manganês para remoção de íons Cd(II) do meio aquoso

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