ZrO2 nanoparticles confined in CMK-3 as highly effective sorbent for phosphate adsorption

Ju, Xiaoqiu; Hou, Jifei; Tang, Yuqiong; Sun, Yabing; Zheng, Shourong; Xu, Zhaoyi

doi:10.1016/j.micromeso.2016.05.002

Cited by 44 publications

(15 citation statements)

References 30 publications

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“…The adsorbent lifetime is increased by reusing it multiple times. Many studies test the adsorbent reusability between 5 and 10 cycles (Fang et al., 2017b; Ju et al., 2016; Jung et al., 2017; Kim et al., 2017; Luo et al., 2017; Wan et al., 2016). Adsorbent attrition during the adsorption or regeneration process is the common reason for reusability getting affected.…”

Section: Introductionmentioning

confidence: 99%

“…Adsorbent attrition during the adsorption or regeneration process is the common reason for reusability getting affected. For example, zirconium oxide particles confined in mesoporous carbon showed a drop in adsorption capacity from 17 to 13 mg P/g over the first 4 cycles whereas the capacity remained stable over the next 3 cycles (Ju et al., 2016). This was attributed to the leaching of zirconium oxide particles located on the external surface or pore mouth region of the adsorbent composite.…”

Section: Introductionmentioning

confidence: 99%

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Adsorption as a technology to achieve ultra-low concentrations of phosphate: Research gaps and economic analysis

Korving²,

et al. 2019

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Eutrophication and the resulting formation of harmful algal blooms (HAB) causes huge economic and environmental damages. Phosphorus (P) from sewage effluent and agricultural run-off has been identified as a major cause for eutrophication. Phosphorous concentrations greater than 100 μg P/L are usually considered high enough to cause eutrophication. The strictest regulations however aim to restrict the concentration below 10 μg P/L. Orthophosphate (or phosphate) is the bioavailable form of phosphorus. Adsorption is often suggested as technology to reduce phosphate to concentrations less than 100 and even 10 μg P/L with the advantages of a low-footprint, minimal waste generation and the option to recover the phosphate. Although many studies report on phosphate adsorption, there is insufficient information regarding parameters that are necessary to evaluate its application on a large scale. This review discusses the main parameters that affect the economics of phosphate adsorption and highlights the research gaps. A scenario and sensitivity analysis shows the importance of adsorbent regeneration and reuse. The cost of phosphate adsorption using reusable porous metal oxide is in the range of $ 100 to 200/Kg P for reducing the phosphate to ultra-low concentrations. Future research needs to focus on adsorption capacity at low phosphate concentrations, regeneration and reuse of both the adsorbent and the regeneration liquid.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Adsorption as a technology to achieve ultra-low concentrations of phosphate: Research gaps and economic analysis

Korving²,

et al. 2019

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“… 16 Considering its tremendous affinity to phosphate ions, excellent biocompatibility, and high chemical inertness toward acids and alkalis, ZrO 2 could serve as an effective and green P adsorbent. 17 , 18 …”

Section: Introductionmentioning

confidence: 99%

Low-Cost Efficient Magnetic Adsorbent for Phosphorus Removal from Water

et al. 2020

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Adsorption using magnetic adsorbents makes the phosphorus removal from water simple and efficient. However, most of the reported magnetic adsorbents use chemically synthesized nanoparticles as magnetic cores, which are expensive and environmentally unfriendly. Replacing the nanomagnetic cores by cheap and green magnetic materials is essential for the wide application of this technique. In this paper, coal-fly-ash magnetic spheres (MSs) were processed to produce a cheap and eco-friendly magnetic core. A magnetic adsorbent, ZrO 2 coated ball-milled MS (BMS@ZrO 2 ), was prepared through a simple chemical precipitation method. Careful structural investigations indicate that a multipore structural amorphous ZrO 2 layer has grown on the MS core. The specific surface area of BMS@ZrO 2 is 48 times larger than that of the MS core. The highest phosphorus adsorption is tested as 16.47 mg g –1 at pH = 2. The BMS@ZrO 2 adsorbent has a saturation magnetization as high as 33.56 emu g –1 , enabling efficient magnetic separation. Zeta potential measurements and X-ray photoelectron spectroscopy analysis reveal that the phosphorus adsorption of BMS@ZrO 2 is triggered by the electrostatic attraction and the ligand exchange mechanism. The BMS@ZrO 2 adsorbent could be reused several times after proper chemical treatment.

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“…To date, surface modification of negatively charged materials with high oxidation state elements has become an important method to compensate or reduce the permanent negative charge on clay surfaces. Previous studies have shown that some metal oxides/hydroxides (e.g., Fe, Al, Zr, and La) modified on clay can act as active species for phosphate adsorption . For example, the modification of bentonites by hydroxy‐iron can enhance phosphate removal from water with low pH dependency and Al‐pillared acid‐activated bentonite powder can effectively remove phosphate species from water in the presence of co‐existing ions .…”

Section: Introductionmentioning

confidence: 99%

“…Previous studies have shown that some metal oxides/ hydroxides (e.g., Fe, Al, Zr, and La) modified on clay can act as active species for phosphate adsorption. [11] For example, the modification of bentonites by hydroxy-iron can enhance phosphate removal from water with low pH dependency [12] and Al-pillared acid-activated bentonite powder can effectively remove phosphate species from water in the presence of co-existing ions. [13] Furthermore, compared to Zr-pillared montmorillonite, modification of Zr/Al-pillared montmorillonite can enhance both the capacity and rate of phosphate adsorption.…”

Section: Introductionmentioning

confidence: 99%

Enhancement of Kaolin Adsorption Affinity Toward Phosphate by Sequestrating Naturally Abundant Ca/Mg From Seawater

Lǐ

et al. 2018

CLEAN Soil Air Water

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A facile and economical strategy is designed to enhance the adsorption affinity of kaolin toward phosphate by acquiring calcium (Ca) and magnesium (Mg) from seawater. The modified kaolin is prepared at different temperatures to obtain CaO/MgO with different surface properties. The different modified kaolins are comparatively characterized using X‐ray diffraction, zero charge, BET surface area, energy dispersive spectrometry, and X‐ray fluorescence spectroscopy. Solution pH slightly affected the removal of phosphate by modified kaolin in the range of 4–7. The maximum adsorption capacity of the modified kaolin sintered at 600 °C (KS600) was 4.07 mg g−1, which is eleven times higher than that of raw kaolin. The presence of SO42− or CO32− ions demonstrates a negative effect on adsorption, whereas the presence of Cl−, F−, or NO3− exerted a negligible effect on removal efficiency. Importantly, KS600 had the capacity to remove phosphate effectively in real sewage. The strong interaction between phosphate and CaO/MgO played a key role in the enhancement of phosphate adsorption. These results indicate that the abundant ocean resources could be used for environmental remediation.

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ZrO2 nanoparticles confined in CMK-3 as highly effective sorbent for phosphate adsorption

Cited by 44 publications

References 30 publications

Adsorption as a technology to achieve ultra-low concentrations of phosphate: Research gaps and economic analysis

Adsorption as a technology to achieve ultra-low concentrations of phosphate: Research gaps and economic analysis

Low-Cost Efficient Magnetic Adsorbent for Phosphorus Removal from Water

Enhancement of Kaolin Adsorption Affinity Toward Phosphate by Sequestrating Naturally Abundant Ca/Mg From Seawater

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