Characteristics and mechanisms of Cu(II) biosorption by disintegrated aerobic granules

Wang, Xinhua; Song, Rui-Hong; Teng, Shao-Xiang; Gao, Mingming; Ni, Jian-Yuan; Liu, Feifei; Wang, Shuguang; Gao, Baoyu

doi:10.1016/j.jhazmat.2010.03.022

Cited by 47 publications

(17 citation statements)

References 33 publications

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“…We considered the ionized coordinated -COO group was the prominent type for carboxyl groups in raw WPWS. Wang et al (2010) found blocking the carboxyl groups of disintegrated aerobic granules had led to a 46% decrease in adsorption amount of copper. In this study, the amount of copper adsorption was declined 23% as the carboxylic groups in WPWS were blocked by esterification.…”

Section: Resultsmentioning

confidence: 98%

Adsorption of Cu(II) from Aqueous Solution by Wine Processing Waste Sludge

Liu

Chen²,

Wang³

et al. 2012

Water Environment Research

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Wine processing waste sludge (WPWS) has heen shown to be an effective sorbent for sorption of nickel, lead, and chromium, but the sorption of copper (Cu) in aqueous solution by WPWS has not been conducted. The objective of this study was to explore the sorption mechanism of WPWS for copper. Infrared analysis revealed carboxyl was the major functional group in WPWS. The WPWS sorption isotherms of copper were only well described by Langmuir sorption isotherm. The maximum adsorption capacity (Qm) was 14.26 mg/g at 50 °C. A pseudosecond-order sorption kinetic model successfully described the kinetics of copper sorption onto WPWS. The Gibb free energies (AG°) ranged from -20.69 to -24.29 kl mol'\ and the AH" and AS° were 5.048 kl mol"' and 91.05 1 mol'' KT', respectively. The trend of the intra-particular diffusion rate is the opposite of the adsorption constant of the pseudosecond-order equation. Water Environ. Res., 84, 733 (2012).

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Section: Resultsmentioning

confidence: 98%

Adsorption of Cu(II) from Aqueous Solution by Wine Processing Waste Sludge

Liu

Chen²,

Wang³

et al. 2012

Water Environment Research

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“…In addition, it was noticed that the Na, Mg, K, and Ca decreased from 1.757, 0.384, 0.455, and 0.548 to 0.508, 0.309, 0.308, and 0.221%, respectively. These results implied that the ion-exchange was involved in the Cu 2+ adsorption [15,16].…”

Section: Characterization Of Aerobic Granular Sludgementioning

confidence: 84%

Adsorptive removal of Cu2+ from aqueous solution using aerobic granular sludge

Jian

Tang

Liu

2015

Desalination and Water Treatment

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A B S T R A C TAerobic granular sludge was prepared as adsorbent to remove Cu 2+ from aqueous solution. Different initial pH values, initial Cu 2+ concentrations, adsorbent doses, and temperatures on Cu 2+ adsorption were evaluated. Three kinds of adsorption isotherms (Langmuir model, Freundlich model, and Redlich-Peterson model) were investigated; the results indicated that equilibrium was well described by Langmuir isotherm, predicting the adsorption of Cu 2+ on aerobic granules was a monolayer adsorption. The equilibrium kinetic adsorption data were fitted to the pseudo-second-order kinetic equation. Furthermore, the sorption of Cu 2+ was controlled primarily by intraparticle diffusion combined with the kinetics process with Energy-dispersive X-ray spectroscopy (EDS) analysis. Parameters of adsorption thermodynamic suggested that the interaction of Cu 2+ adsorbed by aerobic granules was spontaneous and exothermic. Moreover, the Fourier transform infrared spectroscopy (FTIR) results indicated that such active groups -OH, -COOH, and -NH 2 were involved in Cu 2+ adsorption. EDS and FTIR revealed that ion-exchange and surface complexation mechanism coexisted during the adsorption process. Zeta potential analysis demonstrated inner-sphere adsorption happened for Cu 2+ adsorption on aerobic granules.

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“…A very sharp band is apparent at around 1415 cm −1 in the spectrum of liquid fertilizer, in contrast to the small one that appears in the same range in the spectrum of distillery sludge. There is a shallow trough at around 1086 cm −1 in the liquid fertilizer spectrum; however, at the same position on the [16,17]. This reveals that, compared with the DOC of the distillery sludge, the DOC of the liquid fertilizer contained a more abundant alkyl structure but had a lesser aromatic structure.…”

Section: Characterization Of the Soils And Doc Solution Propertiesmentioning

confidence: 93%