Efficient removal of mercury ions with MoS2-nanosheet-decorated PVDF composite adsorption membrane

Zhao, Xiao‐Qi; Li, Jing; Mu, Shuyong; He, Wei; Zhang, Dan; Wu, Xia; Wang, Chuanyi; Zeng, Hehua

doi:10.1016/j.envpol.2020.115705

Cited by 47 publications

(19 citation statements)

References 43 publications

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“…The TGA curves were recorded by the TGA Q5000IR in the temperature of 40-800 C with heating speed of 10 C min -1 . 35 The wide angle X-ray diffration (WAXD) patterns of graphite, GO, m-GO, and r-GO were recorded by a D/ max-2550VB+/PC diffractometer with X-ray wavelength of λ = 0.154 nm at the condition of 40 kV and 150 mA. According to Bragg's Law, the interlayer spacing (d) of samples can be obtained.…”

Section: The Characterization and Testsmentioning

confidence: 99%

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Enhanced wear resistance of ultra‐high molecular weight polyethylene fibers by modified‐graphite oxide

Wang

Quan

et al. 2021

J of Applied Polymer Sci

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A simple and feasible method to enhance the wear resistance of ultra-high molecular weight polyethylene (UHMWPE) fibers was reported. The graphite oxide (GO) prepared using improved Hummer's method was surface modified with hexadecylamine to improve its compatibility with UHMWPE. Combined with well-dispersion of modified-GO (m-GO) in dichloromethane and the fact that the viscosity of UHMWPE suspension can be decreased by dichloromethane, the well dispersed m-GO/dichloromethane was added into UHMWPE suspension to improve m-GO dispersion in UHMWPE fibers. Finally, UHMWPE fibers with different m-GO concentration were prepared using gel spinning technology. The effect of m-GO concentration on the structure and properties of modified UHMWPE fibers were investigated. The results indicated that the melting temperature and crystallinity of m-GO modified UHMWPE fibers increased with increasing of m-GO concentration, while the fiber's crystal sizes and orientation increased, thus the tensile strength of m-GO modified UHMWPE fibers remained almost undamaged. The introduction of m-GO is beneficial to the formation of smooth transfer film on fiber's surface, which enhanced the self-lubrication of UHMWPE fibers. Compared with pure UHMWPE fiber, the UHMWPE fiber containing 1.5 wt% m-GO had enhanced wear resistance by 55.4% and still maintained high tensile strength of 29.98 cN dtex −1 .

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Section: The Characterization and Testsmentioning

confidence: 99%

“…Three to five milligrams of samples was used in the thermogravimetry (TGA) test. The TGA curves were recorded by the TGA Q5000IR in the temperature of 40–800°C with heating speed of 10°C min ‐1 35 …”

Section: Experimental Sectionsmentioning

confidence: 99%

Enhanced wear resistance of ultra‐high molecular weight polyethylene fibers by modified‐graphite oxide

Wang

Quan

et al. 2021

J of Applied Polymer Sci

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“…The purple curve is attributed to the Cr (III) and the pink one is the Cr (VI). The content of Cr (III) and Cr (VI) was calculated according to the integral area of these two curves 52,53 . It demonstrates that and 39.85% Cr (VI) is reduced to Cr (III) during the adsorbed Cr (VI).…”

Section: Resultsmentioning

confidence: 99%

A high Cr (VI) absorption efficiency and easy recovery adsorbent: Electrospun polyethersulfone/polydopamine nanofibers

Wei

Zhang²,

Wang

et al. 2021

J of Applied Polymer Sci

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Cr (VI) is a highly toxic pollutant to humans, to achieve high adsorption capacity, easy recovery, and good reusability, polyethersulfone/polydopamine (PES/PDA) ultrafine fibers were prepared successfully. A series of preparing effect factors were investigated systematically and the optimum one is 8.5 pH value at room temperature and 2 g/L dopamine concentration. And then they were used as an adsorbent for the removal of Cr (VI) ions from wastewater. The effect factors pH, the adsorbent dosage, and time were discussed on Cr (VI) adsorption process and the Cr (VI) adsorption behavior was investigated. It is found that the maximum Cr (VI) adsorption capacity is 115.2 ± 4.8 mg/g at pH = 3 using 0.06 g PES/PDA with 80 mins. The Cr (VI) adsorption process followed the pseudo‐second‐order model (r2 ≥ 0.99) and adsorption isotherms were fitted to the Langmuir model (R2 ≥ 0.999). Furthermore, the Cr (VI) adsorption mechanism was supposed according to the X‐ray photoelectron spectroscopic results. Finally, PES/PDA ultrafine fibers were considered to be a promising adsorbent with good stability (decomposing temperature, 356°C), high adsorption efficiency (112.1 ± 2.5 mg/g), and good reusability (three times) on the coexistence of anions and the actual industry wastewater environment.

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“…For example, while rising pH amplifies the negative charges on the surface of MoS 2 , a strongly alkaline solution would engender the formation of HM-OH complexes [140,141], reducing the adsorption efficiency of the sorbent. As a result, HM ion adsorption's optimum pH on MoS 2 is found in the range of 4.5-7.5 (Table 4) [126][127][128]130,139]. Interestingly, the highest limit of around pH 8 may be general for MS-NMs because of the same reason.…”

Section: Molybdenum Sulfidesmentioning

confidence: 94%

Aqueous Adsorption of Heavy Metals on Metal Sulfide Nanomaterials: Synthesis and Application

Kromah

Zhang

2021

Water

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Heavy metals pollution of aqueous solutions generates considerable concerns as they adversely impact the environment and health of humans. Among the remediation technologies, adsorption with metal sulfide nanomaterials has proven to be a promising strategy due to their cost-effective, environmentally friendly, surface modulational, and amenable properties. Their excellent adsorption characteristics are attributed to the inherently exposed sulfur atoms that interact with heavy metals through various processes. This work presents a comprehensive overview of the sequestration of heavy metals from water using metal sulfide nanomaterials. The common methods of synthesis, the structures, and the supports for metal sulfide nano-adsorbents are accentuated. The adsorption mechanisms and governing conditions and parameters are stressed. Practical heavy metal remediation application in aqueous media using metal sulfide nanomaterials is highlighted, and the existing research gaps are underscored.

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Efficient removal of mercury ions with MoS2-nanosheet-decorated PVDF composite adsorption membrane

Cited by 47 publications

References 43 publications

Enhanced wear resistance of ultra‐high molecular weight polyethylene fibers by modified‐graphite oxide

Enhanced wear resistance of ultra‐high molecular weight polyethylene fibers by modified‐graphite oxide

A high Cr (VI) absorption efficiency and easy recovery adsorbent: Electrospun polyethersulfone/polydopamine nanofibers

Aqueous Adsorption of Heavy Metals on Metal Sulfide Nanomaterials: Synthesis and Application

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