Preparation and application of phosphinic acid functionalized nanosilica for the effective removal of mercury (II) in aqueous solutions

Xiong, Chao; Wang, Shixing; Zhang, Libo; Li, Ying; Srinivasakannan, C.; Peng, Jinhui

doi:10.1007/s10971-018-4723-x

Cited by 11 publications

(4 citation statements)

References 62 publications

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“…Moreover, in the spectrum of GTS-NPSi and TEPA-GTS-NPSi, the peaks at 2934 and 2834 cm −1 were corresponding to the C-H stretching vibration, indicating that organic silane was successfully grafted onto porous silicon nanoparticles' surface [30]. In the spectrum of TEPA-GTS-NPSi, the band at 1384 cm −1 is due to the -NH2 and -NH bending vibrations [31]. These indicate that organic functional groups have successfully grafted on the surface of porous silicon.…”

Section: Characterization Of the Amino-functionalized Nanoporous Siliconmentioning

confidence: 96%

Removal of As(V) Based on Amino-Group Surface-Functionalized Porous Silicon Derived from Photovoltaic Silicon Cutting Powder

Chen

et al. 2021

Coatings

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In this study, amino group surface-functionalized porous silicon adsorbent was successfully prepared for the first time using diamond wire saw silicon powder (DWSSP) as raw material through copper-assisted chemical etching (Cu-ACE) and organic functional group grafting. Amino-functionalized porous silicon adsorbent (TEPA-GTS-NPSi) can be used for removing As(V) from water. The properties and mechanism of the new adsorbent were characterized by infrared spectroscopy (FT-IR), X-ray photoelectron spectroscopy (XPS), scanning electron microscopy (FE-SEM), Brunauer–Emmett–Teller analysis (BET), and thermogravimetric analysis (TGA). The concentration of metal ions in the solution was determined by inductively coupled plasma spectrometry. Meanwhile, the effects of initial pH, adsorption time, initial concentration and adsorbent dosage on the removal of As(V) in an aqueous solution were studied by intermittent adsorption experiments. The results showed that the adsorption equilibrium could be reached rapidly after 30 min soaking. Under the optimized pH of 7, the maximum adsorption capacity was 13.2 mg/g, and the minimum adsorption limit was 3 mg/L. The adsorbent shows good adsorption performance after five successive regenerated cycles. Based on the density functional theory (DFT) analysis results, the adsorption mechanism is attributed to hydrogen bond interaction between the NH2 group and As(V) ions.

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Section: Characterization Of the Amino-functionalized Nanoporous Siliconmentioning

confidence: 96%

Removal of As(V) Based on Amino-Group Surface-Functionalized Porous Silicon Derived from Photovoltaic Silicon Cutting Powder

Chen

et al. 2021

Coatings

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“…The excellent adsorption capacity of PPAN hollow ber membranes is due to the high a nity between phosphinic acid groups and mercury ions, which is caused by the strong interaction of soft acids and bases. (Xiong et al 2018;Lin et al 2018).…”

Section: Selective Adsorption For Hg 2+mentioning

confidence: 99%

“…The C1s spectra of the PPAN membrane showed three distinct peaks at 284.13 eV, 285.25 eV, and 286.87 eV (Fig.3c), which were associated with C-C (C-H), C-O, and C-N bonds, respectively. In addition, the characteristic peak at 285.05eV corresponds to the C-O (PO) bond of the phosphinic acid group(Xiong et al 2018). Figure3dshowed the N1s spectra of the PPAN membrane, and three peaks at 396.61 eV, 398.53 eV, and 400.25 eV corresponded to NR 2 (R = CH 2 H 2 PO 2 ), -NH, and O = C-N bonds (Yuan et al 2013), respectively.…”

mentioning

confidence: 99%

Preparation and properties of phosphinic acid–functionalized polyacrylonitrile hollow fiber membrane for heavy metal adsorption

Cheng

Zhang

Chen

et al. 2022

Environ Sci Pollut Res

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In this study, phosphorylated polyacrylonitrile hollow ber membrane was synthesized by reacting aminated polyacrylonitrile hollow ber membrane with phosphinic acid in a Mannich reaction. The batch single factor measurements revealed that the PPAN membrane had an outstanding ability for Hg 2+ adsorption. Thermodynamic investigations indicated that the adsorption process was homogenous, and the theoretical maximum adsorption capacity predicted by the Langmuir model was 371.75 mg•g − 1 . The PPAN membrane was able to successfully chelate Hg 2+ ions and attain saturation in 4 hours, demonstrating that the reaction was chemically controlled by the adsorption kinetics. Based on the FT-IR and XPS spectral characterization data, successful phosphinic acid group grafting was proven, and a plausible mechanism for Hg 2+ adsorption by PPAN membranes was presented. Furthermore, the ve adsorption-desorption cycle experiments revealed that PPAN hollow ber membranes had outstanding reusability, indicating a possible use for removing heavy metal ions from wastewater.

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“…ere are various conventional technologies [1][2][3][4][5][6][7][8][9][10] to remove heavy metal ions from wastewater, such as coagulation, oxidation/filtration, chemical precipitation, reverse osmosis, absorption, electrochemistry, and ion exchange. However, there are some problems about these technologies, such as secondpollution, high-cost, and inconvenient process.…”

Section: Introductionmentioning

confidence: 99%

A Modified Preparation of Cellulosic‐Absorbent Resin for Cu²⁺ Removal under Microwave Irradiation

Jing

Zhao

2020

Advances in Materials Science and Engineering

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The absorbent resin for Cu2+ removal was prepared under microwave irradiation through grafting acrylamide (AM) and acrylic acid (AA) to cellulose. The initiator is a kind of redox system composed of potassium persulfate/sodium thiosulfate. The crosslinking agent is N,N′-methylene bisacrylamide. The optimal reaction conditions are as follows: the ratio of AA to cellulose is 10 : 1, initiator to AA is 0.65 wt%, crosslinking agent to AA is 1.0 wt%, neutralization degree of AA is 75%, microwave power level is 320 W, and time is 300 s. The maximum absorption capability of the resin is 65 mg·g−1. Different from previous studies, the reaction was carried out without the protection of nitrogen and troublesome posttreatment. The product was obtained directly by one-step synthesis without purification and drying of the crude product. The pollution and cost caused by organic solvent are avoided, and the whole preparation period is shortened deeply. Moreover, the time of absorption equilibrium is shorter. In a word, the preparation in this paper has the obvious advantages, such as simple process, short time, no pollution, low-energy, and low-cost.

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Preparation and application of phosphinic acid functionalized nanosilica for the effective removal of mercury (II) in aqueous solutions

Cited by 11 publications

References 62 publications

Removal of As(V) Based on Amino-Group Surface-Functionalized Porous Silicon Derived from Photovoltaic Silicon Cutting Powder

Removal of As(V) Based on Amino-Group Surface-Functionalized Porous Silicon Derived from Photovoltaic Silicon Cutting Powder

Preparation and properties of phosphinic acid–functionalized polyacrylonitrile hollow fiber membrane for heavy metal adsorption

A Modified Preparation of Cellulosic‐Absorbent Resin for Cu²⁺ Removal under Microwave Irradiation

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Preparation and application of phosphinic acid functionalized nanosilica for the effective removal of mercury (II) in aqueous solutions

Cited by 11 publications

References 62 publications

Removal of As(V) Based on Amino-Group Surface-Functionalized Porous Silicon Derived from Photovoltaic Silicon Cutting Powder

Removal of As(V) Based on Amino-Group Surface-Functionalized Porous Silicon Derived from Photovoltaic Silicon Cutting Powder

Preparation and properties of phosphinic acid–functionalized polyacrylonitrile hollow fiber membrane for heavy metal adsorption

A Modified Preparation of Cellulosic‐Absorbent Resin for Cu2+ Removal under Microwave Irradiation

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A Modified Preparation of Cellulosic‐Absorbent Resin for Cu²⁺ Removal under Microwave Irradiation