Synergetic effects of anhydrite and brucite-periclase materials on phosphate removal from aqueous solution

Cheng, Ping; Chen, Dong; Liu, Haibo; Zou, Xuehua; Wu, Zongshan; Xie, Jingjing; Qing, Chen; Kong, Dian-Chao; Chen, Tianhu

doi:10.1016/j.molliq.2018.01.102

Cited by 16 publications

(6 citation statements)

References 41 publications

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“…This illustrates that phosphate adsorption onto Mg‐CO 2 is most likely controlled by both Langmuir and Freundlich processes with multiple heterogeneous sorption. The maximum adsorption capacity of Mg‐CO 2 for phosphate estimated by the Langmuir equation was 1135.0 mg/g, a value drastically higher by one magnitude than other adsorbents previously reported 33‐35 …”

Section: Resultsmentioning

confidence: 65%

“…The maximum adsorption capacity of Mg-CO 2 for phosphate estimated by the Langmuir equation was 1135.0 mg/g, a value drastically higher by one magnitude than other adsorbents previously reported. [33][34][35] Investigating the influence of coexisting anions on phosphate adsorption of Mg-CO 2 is very important to the practical application, because various anions commonly coexist in actual wastewater and compete with phosphate for adsorption sites. Figure 3C .…”

Section: Resultsmentioning

confidence: 99%

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Burning magnesium in carbon dioxide for highly effective phosphate removal

Yao

Wang

et al. 2020

Carbon Energy

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Magnesium oxide was found to have high-phosphate-affinity as an effective component to enhance the phosphate removal ability of common adsorbent materials. However, the currently prepared MgO-based hybrid adsorbents by conventional methods still suffer from the limited low loading of MgO and inferior removal performances, much far away from practical application. In this study, an ingenious carbon coated MgO nanocomposite is designed by directly burning magnesium in CO 2 , a well-known textbook reaction. X-ray diffraction analysis, scanning electron microscope and aberration-corrected high-resolution transmission electron microscope demonstrate the sample is well prepared. Consequently, the high content of nanosized MgO combined with defect-rich carbon layer brings unprecedented phosphate removal capacity of 1135.0 mg/g, removal rate of 99% and benign compatibility with coexisting anions and solution pH. Furthermore, the removal mechanism is also investigated in detail by characterizing the sample before and after adsorption.

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Section: Resultsmentioning

confidence: 65%

Section: Resultsmentioning

confidence: 99%

Burning magnesium in carbon dioxide for highly effective phosphate removal

Yao

Wang

et al. 2020

Carbon Energy

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“…The chloride ion dissolution rates under the solid to liquid ratio of 1:50 after water leaching for 15 min at 25 • C, 45 • C and 65 • C were 94.24%, 94.96% and 95.14%, respectively. The chlorine dissolving data exhibited a good fit for Stumm's kinetic models (correlation coefficients R 2 > 0.90) [23]. These results also indicated that the effects of temperature on the final chloride dissolution rate were less, while the final chloride dissolution rates were a little bit lower than that of solid-liquid ratio of 1:100 at the same temperature.…”

Section: Solid To Liquid = 1:50mentioning

confidence: 54%

“…The Stumm's kinetic model [22,23] is employed to simulate the dissolution kinetics of chlorine in sintering dust. Its differential form is given in the following equation.…”

Section: Stumm's Kinetic Modelmentioning

confidence: 99%

Dissolution Kinetics of Chlorine from Iron Ore Sintering Dust

Tang

Zhao

Yang

et al. 2021

Metals

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Chlorine is generated during iron ore sintering, mostly in the form of alkali chlorides and primarily accumulates in sintering dust, which must be removed before reusing. In this study, an in-situ monitor leaching system based was designed to detect chloride ion water leaching behaviors in real-time and improve the understanding of chlorine dissolution kinetic behaviors in water. Various parameters, including water leaching temperature, solid/liquid ratio, stirring speed, particle size and surfactant addition have been studied. Meanwhile their chlorine dissolution data exhibited a good fit to Stumm’s kinetic models. The results of kinetics analysis and transition state theory calculation on apparent activation energy demonstrated that the dissolution process was controlled by diffusion at low S/L ratio, while changed to be controlled by surface chemical reaction as the S/L ratio increased. Furthermore, increasing both temperature and stirring speed improved the chlorine removal speed. Moreover, reducing the particle size and adding 0.2% nonionic surfactant Triton X-100 reduced the surface energy and accelerated surface chemical reaction, which were also beneficial for removing chlorine from sintering dust. In addition, the SEM-EDS examination inferred that the existence of laurionite (PbOHCl) limited the chlorine dissolution rate to less than 97%, while beneficiation or hydrometallurgy treatment was needed to further remove chlorine.

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“…The World Health Organization (WHO) also recommends phosphate ion concentration of less than 5 mg/L in natural water [6], though water blooms have broken out in China and Southeast Asia frequently [1,7,8]. In order not to occur water environmental problems, it is important to not only reduce releasing nutrients into natural water but also remove phosphate from wastewater [9][10][11].…”

Section: Introductionmentioning

confidence: 99%

Phosphate ion adsorption properties of PAN-based activated carbon fibers prepared with K2CO3 activation

2020

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Adsorbents for phosphate ion removal were prepared with K 2 CO 3 activation and heat treatment at 950 °C from polyacrylonitrile-based carbon fiber (PAN-CF). Comparative tests for specific surface area and pore structures, elemental and nitrogen species analysis, and phosphate ion adsorption experiments demonstrated that K(3)-Δ, which was activated with K 2 CO 3 /PAN-CF weight ratio of 3 and then treated at 950 °C, exhibited larger amount of quaternized-nitrogen (0.46 wt%) and equilibrium adsorption amount (0.23 mmol/g) among the prepared adsorbents. The experimental data for phosphate adsorption of K(3)-Δ was well fitted to Langmuir adsorption isotherms and pseudo-second-order kinetic model. As for regeneration performance, K(3)-Δ still remained more than 60% adsorption amount of the fresh adsorbent after rejuvenation treatment.

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Synergetic effects of anhydrite and brucite-periclase materials on phosphate removal from aqueous solution

Cited by 16 publications

References 41 publications

Burning magnesium in carbon dioxide for highly effective phosphate removal

Burning magnesium in carbon dioxide for highly effective phosphate removal

Dissolution Kinetics of Chlorine from Iron Ore Sintering Dust

Phosphate ion adsorption properties of PAN-based activated carbon fibers prepared with K2CO3 activation

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