Development of a Novel Hollow Fiber Cation-Exchange Membrane from Bromomethylated Poly(2,6-dimethyl-1,4-phenylene oxide) for Removal of Heavy-Metal Ions

Cheng, Zhenfeng; Wu, Yonghui; Wang, Na; Yang, Wei; Xu, Tongwen

doi:10.1021/ie901408c

Cited by 43 publications

(13 citation statements)

References 52 publications

(54 reference statements)

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The Freundlich isotherm [27], which is based on sorption on a heterogeneous surface, is the earliest known relationship that describes sorption equilibrium. Its linearized form is given as:…”

Section: Sorption Isothermmentioning

confidence: 99%

The defluoridation of drinking water using multi-walled carbon nanotubes

Ansari

Dehghani

Kazemipour

2011

Journal of Fluorine Chemistry

View full text Add to dashboard Cite

Section: Sorption Isothermmentioning

confidence: 99%

The defluoridation of drinking water using multi-walled carbon nanotubes

Ansari

Dehghani

Kazemipour

2011

Journal of Fluorine Chemistry

View full text Add to dashboard Cite

“…Therefore, it is very important to find a green and effective way to remove cadmium to an acceptable level 4 , 5 . At present, the methods of removing heavy metal ions 6 – 10 are: chemical precipitation 11 , 12 , coagulation-flocculation-sedimentation 13 , solvent extraction 14 , 15 , ion exchange 16 , membrane filtration 17 , 18 and adsorption 19 , 20 . Among them, adsorption is commonly considered to be one of the most promising techniques due to its apparatus simplicity, high efficiency process, and low costs 8 , 21 – 25 .…”

Section: Introductionmentioning

confidence: 99%

Creation of Hollow Calcite Single Crystals with CQDs: Synthesis, Characterization, and Fast and Efficient Decontamination of Cd(II)

Yang

Nie

et al. 2018

Sci Rep

View full text Add to dashboard Cite

In this work, carbon quantum dots were first prepared through one-pot hydrothermal route of the propyl aldehyde and sodium hydroxide via an aldol condensation reaction, and a novel solid-phase extraction adsorbent of hollow calcite single crystals was prepared via the precipitation of metal nitrates by the CO2 diffusion method in the presence of CQDs and further applied for excessive Cd(II) ions removal from water. The spectra and morphologies of the etched calcite were investigated by X-ray diffraction, Fourier transform infrared spectrometry, Scanning electron microscope, and Transmission electron microscopy. The results show that the CQDs etching technique successfully furnish a strategy for manufacturing interface defects onto the calcite crystal. Bath studies were done to evaluate the effects of the major parameters onto Cd(II) adsorption by the etched calcite, such as pH, contact time, and initial Cd(II) concentration. The Cd(II) adsorption onto the new adsorbent could reach a maximum adsorption amount of 66.68 mg/g at 120 min due to the abundant exterior adsorption sites on the adsorbent. The adsorption kinetics and adsorption isotherms of Cd(II) on the etched calcite were also investigated. The experimental datum showed that the adsorption kinetics and isotherms of Cd(II) on the etched calcite were well-fitted by the pseudo-second-order kinetic model and the Freundlich isotherm model respectively. The adsorption mechanisms could be primarily explained as the formation of Cd(OH)2 and CaxCd1−xCO3 solid solution on the adsorbent surface with the help of X-ray photoelectron spectroscopy.

show abstract

“…Therefore, much more efforts should be put into the elimination of heavy metal ions from wastewater. Up to now, researchers have tried to remove heavy metal ions by various methods, including membrane separation [5], precipitation [6], ion-exchange [7], reverse osmosis [8] and adsorption [9]. Among those methods, the advantages of adsorption such as simpleness, high-efficiency and cost-saving make it a promising and favorable method in wastewater treatment.…”

Section: Introductionmentioning

confidence: 99%