Sorption of radiocobalt(II) from aqueous solutions to Na-attapulgite

Tan, Liqiang; Jin, Yiming; Chen, Jing; Cheng, Xiao‐Chun; Wu, Jie; Feng, Li

doi:10.1007/s10967-011-1121-z

Cited by 35 publications

(2 citation statements)

References 60 publications

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“…Cobalt contamination problems are widely observed in various industries today [ 1 ]. Considering the usage of metallic cobalt and related salts in diverse industrial sectors, a higher concentration of cobalt may induce both environmental degradation and health problems [ 2 ]. Considering the high toxicity for human health, the cobalt concentration in wastewater is restricted to less than 1 mg/L by the emission standard of pollutants for the cobalt industry GB25467-2010.…”

Section: Introductionmentioning

confidence: 99%

Crystalline/Amorphous Blend Identification from Cobalt Adsorption by Layered Double Hydroxides

et al. 2018

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In this study, the adsorption behavior of CaAl-Cl layered double hydroxide (CaAl-Cl-LDH) with a controlled pH value (pH = 6) on Co(II) ions ([Co] = 8 mM) is investigated. The comprehensively accepted mechanism of cobalt adsorption on LDH is considered to be co-precipitation, and the final adsorbed products are normally crystalline Co-LDH. One unanticipated finding is that crystalline/amorphous blends are found in the X-ray diffraction (XRD) pattern of Co-adsorbed LDH. To shed light on the adsorption products and the mechanisms in the adsorption process of Co(II) in an aqueous solution by CaAl-Cl-LDH, a series of testing methods including Fourier-transform infrared spectroscopy (FT-IR), Scanning electron microscope (SEM), High-resolution transmission electron microscopy (HR-TEM), X-ray photoelectron spectroscopy (XPS), and inductively coupled plasma (ICP) are applied to clarify the interaction between cobalt and CaAl-Cl-LDH. According to the comprehensive analysis, the formation of the crystalline/amorphous blends corresponds to two adsorption mechanisms. The crystalline phases are identified as Co6Al2CO3(OH)16·4H2O, which is attributed to the co-precipitation process occurring in the interaction between Co(II) and CaAl-Cl-LDH. The formation of the amorphous phases is due to surface complexation on amorphous Al(OH)3 hydrolyzed from CaAl-Cl-LDH.

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Section: Introductionmentioning

confidence: 99%

Crystalline/Amorphous Blend Identification from Cobalt Adsorption by Layered Double Hydroxides

et al. 2018

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“…The Langmuir sorption capacities (q max ) of M/SEP composite for the removal of Co(II) and Cd(II) are compared with those of other sorbents reported in the literature [19,22,[36][37][38][39][40][41][42] and the values of sorption capacities are presented in Table M/SEP composite has a high sorption capacity for Co(II) or Cd(II) as comparable with that of other sorbents. Therefore, considering the low cost and easy preparation of this material, it can be used as an alternative sorbent for the removal of Co(II) and Cd(II) from aqueous solutions.…”

Section: Sorption Isothermsmentioning

confidence: 89%

Synthesis and structural characterization of magnetite/sepiolite composite and its sorptive properties for Co(II) and Cd(II)

Zhai

Zhong

et al. 2016

Journal of the Taiwan Institute of Chemical Engineers

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Sorption/desorption of radionickel on/from Na-montmorillonite: kinetic and thermodynamic studies

Tan

2011

J Radioanal Nucl Chem

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Sorption of radiocobalt(II) from aqueous solutions to Na-attapulgite

Cited by 35 publications

References 60 publications

Crystalline/Amorphous Blend Identification from Cobalt Adsorption by Layered Double Hydroxides

Crystalline/Amorphous Blend Identification from Cobalt Adsorption by Layered Double Hydroxides

Synthesis and structural characterization of magnetite/sepiolite composite and its sorptive properties for Co(II) and Cd(II)

Sorption/desorption of radionickel on/from Na-montmorillonite: kinetic and thermodynamic studies

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