Aluminum speciation of coagulants with low concentration: Analysis by electrospray ionization mass spectrometry

Zhao, He; Liu, Huijuan; Qu, Jiuhui

doi:10.1016/j.colsurfa.2010.11.045

Cited by 31 publications

(7 citation statements)

References 40 publications

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“…1(b) -348.9 m/z is pronounced. The presence of peaks in the range of 400-550 m/z, which is characteristic for the high polymer forms of aluminium with 9, 10 and 16 atoms of aluminium in the structure, is observed [30,34]. According to the present results, the composite coagulant AlCl 3 /PAC is characterized by great amount and variety of the high polymer forms of aluminium.…”

Section: Resultssupporting

confidence: 68%

“…According to the obtained results listed in Table 3, the amount of the Al-соntaining polynuclear complexes, having a polymer and high polymer form, in the developed coagulant is greater than that in both the initial PAC and the Al 2 (SO 4 ) 3 /PAC system. The second method of comparison is based on the qualitative analysis of the forms of the products of hydrolysis of composite coagulants by the ion massspectroscopy on a GCMS-QP2010 device (Shimadzu, Japan) [34]. The analysis of the aluminium forms was performed by the characteristic peaks with the intensity no less than 20%.…”

Section: Resultsmentioning

confidence: 99%

See 1 more Smart Citation

Difference in the Treatment Effectiveness of Woodworking Wastewater Between Polyaluminium Chloride-Based Coagulants

Brovkina

Shulga

Neiberte

et al. 2015

ETR

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<p>in the work, a comparative study of the efficiency of coagulation of a model solution, simulating woodworking wastewater, with the known composition of polyaluminium chloride (РАС) with aluminium sulphate and a new РАС-based composite coagulant was carried out. It has been found that, in comparison with the known composition, the developed composite coagulant makes it possible to enhance the efficiency of the wastewater treatment and to decrease the content of residual aluminium therein, which enables the return of the treated water in the technological cycle. The enhancement of the coagulation ability of the developed composite coagulant relative to the known composition of РАС with aluminium sulphate is governed by the formation, in the AlCl<sub>3</sub>/РАС system, of polynuclear Аl-complexes with a high-molecular structure. This is testified by the results of the comparative study of those coagulants by the Ferron and ion mass spectroscopy methods.</p>

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Section: Resultssupporting

confidence: 68%

Section: Resultsmentioning

confidence: 99%

Difference in the Treatment Effectiveness of Woodworking Wastewater Between Polyaluminium Chloride-Based Coagulants

Brovkina

Shulga

Neiberte

et al. 2015

ETR

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“…The dominant species of the organic compound and the Al salt changed depending on the pH conditions. The Al salt existed mainly in the form of Al 3+ (pH < 4.1) (Zhao et al, ), Al 13 7+ and Al(OH) 3 (4.7 < pH < 9.6) (Lin et al, ; Zhao et al, ), and low‐molecular‐weight hydroxyl‐Al polymers (4.1 < pH < 4.7) (Zhao et al, ). Thus, pH has a substantial influence on the adsorption and flocculation process of the micelles.…”

Section: Resultsmentioning

confidence: 99%

Removal of Organic Compounds Containing a Benzene Ring from Water by Adsorptive Micellar Flocculation

Wang

Tian

et al. 2018

J Surfact & Detergents

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The removal of low‐molecular‐weight benzoic acid (benzoic acid, p‐toluic acid, and salicylic acid)‐derived and aniline (aniline, 4‐chloroaniline, and 2,6‐dimethylaniline)‐derived organic compounds through adsorptive micellar flocculation (AMF) with anionic surfactants (sodium dodecyl sulfate, SDS) and aluminum sulfate was demonstrated. The interactions between SDS and the organic compounds were studied using 1H nuclear magnetic resonance (NMR) spectroscopy. Batch AMF experiments were conducted to study the influence of several factors on target pollutant removal. For benzoic acid derivatives, the removal rate was improved by increasing the SDS and Al concentrations, while increases in the concentrations of the organic pollutant tended to decrease the removal rate. The highest removal efficiencies were observed with p‐toluic acid (95.4%) > salicylic acid (84.5%) > benzoic acid (76.5%) under weakly acidic conditions due to the greater hydrophobicity of p‐toluic acid and the complexation of the Al salts and the salicylic acid. The removal rates of the aniline derivatives were positively related to the SDS concentration and negatively related to the pH. At a pH of 3.0, the highest removal rates of aniline, 4‐chloroaniline, and 2,6‐dimethylaniline (91.3%, 98.0%, and 97.6%, respectively) were observed. For aniline compounds, charge neutralization between the SDS anions and aniline cations dominated the removal process. These findings provide new insights for the development of further applications of AMF for the removal of benzoic acid and aniline derivatives.

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“…However, with increasing pH to alkaline region, the hydrolysis of aluminium ions is accelerated, allowing for enhanced electro-neutralisation (Sun et al, 2017), resulting in more polymers and improved bridging coagulation between ions. At lower alkaline conditions, PAFS coagulants are positively charged, and both coagulants and negatively charged particulate matter are attracted to each other (Zhao et al, 2011), allowing flocs to form easily and turbidity removal to be effective. However, at higher alkaline conditions, the coagulants tend to hydrolyse too quickly (Zhao et al, 2011;Zhu et al, 2011), and the aluminium ions tend to form precipitates, which inhibits the bridging coagulation and therefore has a poor coagulation capacity (Zhao et al, 2016).…”

Section: Effect Of Wastewater Initial Ph On Turbidity Removal Efficiencymentioning

confidence: 99%

Synthesis and Performance of PAFS Coagulant Derived from Aluminium Dross

Li¹,

Sobri²

2022

JST

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Polymerised aluminium ferric sulphate (PAFS) was prepared from aluminium dross as a coagulant in wastewater treatment. The effects of leaching time, leaching temperature, and sulfuric acid concentrations on the turbidity removal of the wastewater were investigated, and the optimum conditions were determined using response surface methodology. The results showed that the optimum PAFS preparation conditions were at a leaching time of 60 minutes, a leaching temperature of 65°C, and a sulfuric acid concentration of 1 mol/L. Furthermore, experiments were performed to investigate the effect of coagulant dosages using the PAFS prepared under the optimum leaching conditions, settling time and initial pH of the wastewater on the turbidity removal efficiency. As a result, it was found that the optimum coagulation conditions for PAFS coagulants were at a settling time of 15 minutes, coagulant dosage of 0.5g, and raw water pH 8. Under these optimum conditions, the turbidity removal efficiency of the wastewater was 91.45%. The purpose of this study was to investigate the possibility of aluminium dross utilisation as a coagulant agent for wastewater treatment. Therefore, it can be concluded that PAFS prepared by leaching metal oxides from aluminium dross is an effective wastewater coagulant.

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Aluminum speciation of coagulants with low concentration: Analysis by electrospray ionization mass spectrometry

Cited by 31 publications

References 40 publications

Difference in the Treatment Effectiveness of Woodworking Wastewater Between Polyaluminium Chloride-Based Coagulants

Difference in the Treatment Effectiveness of Woodworking Wastewater Between Polyaluminium Chloride-Based Coagulants

Removal of Organic Compounds Containing a Benzene Ring from Water by Adsorptive Micellar Flocculation

Synthesis and Performance of PAFS Coagulant Derived from Aluminium Dross

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