scholarly journals Removal of Pb(II) Ions Using Polymer Inclusion Membranes Containing Calix[4]resorcinarene Derivative as Ion Carrier

Polymers ◽  
2019 ◽  
Vol 11 (12) ◽  
pp. 2111 ◽  
Author(s):  
Iwona Zawierucha ◽  
Anna Nowik-Zajac ◽  
Cezary A. Kozlowski
Keyword(s):  
High Stability ◽  
High Selectivity ◽  
Separation Efficiency ◽  
Toxic Metal ◽  
Cellulose Triacetate ◽  
Transport Activity ◽  
Effective Transport ◽  
Ion Carrier ◽  
Industry Effluent ◽  
Battery Industry

Stricter environmental regulations regarding the discharge of toxic metals require developing various technologies for the removal of these metals from polluted effluents. The removal of toxic metal ions using immobilized membranes with doped ligands is a promising approach for enhancing environmental quality, because of the high selectivity and removal efficiency, high stability, and low energy requirements of the membranes. Cellulose triacetate-based polymer inclusion membranes (PIMs), with calix[4]resorcinarene derivative as an ion carrier, were analyzed to determine their ability for removal of Pb(II) ions from aqueous solutions. The effects of ion carrier concentration, plasticizer amount, pH of source aqueous phase, and receiving agents on the effective transport of Pb(II) were determined. All studied parameters were found to be important factors for the transport of Pb(II) ions. The PIM containing calix[4]resorcinarene derivative as an ion carrier showed high stability and excellent transport activity for selective removal of Pb(II) from the battery industry effluent, with a separation efficiency of 90%.

Highly Selective Separation and Enrichment of Phosphopeptides by Uranyl-Salophen Immobilized Silica Gel Material

2015 ◽  
Vol 1095 ◽  
pp. 341-344 ◽  
Author(s):  
Can Hui Xu ◽  
Guang Liang Zhang ◽  
Xin Zhou ◽  
Xi Lin Xiao ◽  
Chang Ming Nie ◽  
...  
Keyword(s):  
Silica Gel ◽  
Metal Ion ◽  
High Selectivity ◽  
Separation Efficiency ◽  
Solid Phase ◽  
Tetradentate Ligand ◽  
Peptide Mixtures ◽  
New Material ◽  
Solid Phase Material

The characterization of phosphoproteins requires highly specific methods for the separation and enrichment of phosphopeptides. Here we report a novel metal ion-immobilized solid phase material for the separation and enrichment of phosphopeptides. The material is uranyl-salophen-silica gel (USSG) particles in which salophen is a tetradentate ligand of uranyl ion. In USSG salophen is connected on the surface of silica gel and uranyl is bound on the surface through its coordination with salophen. Phosphopeptides can be selectively retained by USSG because uranyl-salophen can bind phosphate moiety with strong affinity and high selectivity. The new material USSG has been successfully used for the separation of phosphopeptides from peptide mixtures with the separation efficiency of 97.0% to 97.4%.

Controllable Preparation of Silver Orthophosphate@Carbon Layer Core/Shell Heterostructure with Enhanced Visible Photocatalytic Properties and Stability

NANO ◽  
2015 ◽  
Vol 10 (02) ◽  
pp. 1550022 ◽  
Author(s):  
Yangcun Xie ◽  
Xiuwen Wang ◽  
Xu Wen
Keyword(s):  
High Stability ◽  
Separation Efficiency ◽  
Visible Region ◽  
Carbon Layer ◽  
Core Shell ◽  
Photogenerated Electrons ◽  
First Time ◽  
Fabrication Parameters ◽  
Controllable Preparation ◽  
High Separation

In this study, silver orthophosphate@carbon layer ( Ag 3 PO 4@ C ) core/shell heterostructure photocatalyst was prepared for the first time. The results showed that a uniform carbon layer was formed around the Ag 3 PO 4. By adjusting the hydrothermal fabrication parameters, the thickness of carbon layer could be easily controlled. Furthermore, the Ag 3 PO 4@ C had remarkable light absorption in the visible region. Photocatalytic tests displayed that the Ag 3 PO 4@ C heterostructures possessed a much higher degradation rate of phenol than pure Ag 3 PO 4 under visible light. The enhanced photocatalytic activity could be attributed to high separation efficiency of photogenerated electrons and holes based on the synergistic effect between carbon as a sensitizer and Ag 3 PO 4. Recycle tests showed that the Ag 3 PO 4@ C core/shell heterostructures maintained high stability over several cycles. The good stability could be attributed to the protection of insoluble carbon layer on the surfaces of Ag 3 PO 4 crystals in aqueous solution.

Spatially separated cocatalysts for efficient charge separation: a hollow Pt/CdS/N–ZnO/CoOx graphene microtubule with high stability for photocatalytic reactions and sustainable recycling

2019 ◽  
Vol 9 (24) ◽  
pp. 6899-6908 ◽  
Author(s):  
Yong Liang ◽  
Yuexing Chen ◽  
Maojun Zhao ◽  
Li Lin ◽  
Rongtao Duan ◽  
...  
Keyword(s):  
Hydrothermal Method ◽  
Charge Separation ◽  
High Stability ◽  
Photocatalytic Oxidation ◽  
Separation Efficiency ◽  
Capillary Action ◽  
Efficient Charge ◽  
Charge Separation Efficiency ◽  
Photocatalytic Reactions

The spatially separated Pt/CdS/N–ZnO/CoOx graphene microtubule (PCNZCo-GM) with double cocatalysts is prepared by a capillary action assisted hydrothermal method for enhancing charge separation efficiency and photocatalytic oxidation ability.

Advanced porous membranes with ultra-high selectivity and stability for vanadium flow batteries

2016 ◽  
Vol 9 (2) ◽  
pp. 441-447 ◽  
Author(s):  
Zhizhang Yuan ◽  
Yinqi Duan ◽  
Hongzhang Zhang ◽  
Xianfeng Li ◽  
Huamin Zhang ◽  
...  
Keyword(s):  
High Stability ◽  
High Selectivity ◽  
Low Cost ◽  
Porous Membranes ◽  
Flow Batteries

Advanced porous membranes combining ultra-high stability and selectivity with very low cost are designed and fabricated for vanadium flow batteries.

A Review: Extraction of Platinum Spent Catalyst Using Palm Oil Leaf as Reducing Agent

2015 ◽  
Vol 1113 ◽  
pp. 317-321
Author(s):  
Mohd Rashwan Taufiq Khairol Anwar ◽  
Norashikin Ahmad Zamanhuri ◽  
Junaidah Jai ◽  
Noorsuhana Mohd Yusof
Keyword(s):  
Palm Oil ◽  
High Stability ◽  
High Selectivity ◽  
Reducing Agent ◽  
High Yield ◽  
Spent Catalyst ◽  
Recovery Method ◽  
Paper Review ◽  
Better Than

Platinum is commercially used in the catalytic industry for ages. The use of platinum has been significantly practiced because of its enhancing properties. There are a few advantages of using platinum such as high selectivity, high yield, high stability and able to undergo improvisation. However, when platinum lifetime is out, it is treated mainly as waste. Low recovery of platinum spent catalyst brought to the existence of recovery method using acidic and alkaline method. Proved to be harmful, green subtances were used as substitute for the chemical in recovering platinum. Therefore, a cheaper, safer and more environmentally method of recovery. Thus,this paper review about recovering platinum using palm oil leaf and how it is better than the existed chemical based method.

scholarly journals Separation Of Cadmium(II), Cobalt(II) And Nickel(II) By Transport Through Polymer Inclusion Membranes With Phosphonium Ionic Liquid As Ion Carrier / Separacja Jonów Kadmu(II), Kobaltu(II) I Niklu(II) W Procesie Transportu Przez Polimerowe Membrany Inkluzyjne Zawierające Fosfoniową Ciecz Jonową W Roli Przenośnika

2015 ◽  
Vol 60 (4) ◽  
pp. 2933-2938 ◽  
Author(s):  
B. Pospiech
Keyword(s):  
Ionic Liquid ◽  
Hydrochloric Acid ◽  
Cellulose Triacetate ◽  
Hydrochloric Acid Concentration ◽  
Acid Solutions ◽  
Hydrochloric Acid Solutions ◽  
Phosphonium Ionic Liquid ◽  
Aqueous Chloride ◽  
Ion Carrier ◽  
Cyphos Il 101

This paper presents study on the facilitated transport of cadmium(II), cobalt(II) and nickel(II) ions from aqueous chloride solutions through polymer inclusion membranes (PIMs) with phosphonium ionic liquid. Cyphos IL 101 (trihexyl(tetradecyl) phosphonium chloride) was used as a selective carrier for synthesis of cellulose triacetate membranes containing o-nitrophenyl pentyl ether (ONPPE) as a plasticizer. Effect of different parameters such as hydrochloric acid concentration in the source phase as well as ion carrier concentration in the polymer membrane on metal ions transport has been investigated. Cd(II) was transported preferably from hydrochloric acid solutions containing Co(II) and Ni(II) through PIM containing 18.8 wt.% CTA and 26.0 wt.% Cyphos 101 and 55.1 wt.% ONPPE into 0.5 M HNO3 as the receiving phase. The obtained results suggest that there is a possibility of application of this membrane with Cyphos IL 101 as ion carrier for separation of Cd(II) over Co(II) and Ni(II) from hydrochloric acid solutions.

scholarly journals Phytoremediation of battery industry effluent through aquatic macrophytes

2020 ◽  
Vol 8 (1) ◽  
pp. 6
Author(s):  
Mahrine Rashid ◽  
Iftilkhar Ahmad ◽  
Ashique Muhammad ◽  
Mahmood Ul Hassan
Keyword(s):  
Eichhornia Crassipes ◽  
Aquatic Macrophytes ◽  
Industrial Effluent ◽  
Low Ph ◽  
Pistia Stratiotes ◽  
Lead Acid Battery ◽  
Pb Contamination ◽  
Wastewater Samples ◽  
Industry Effluent ◽  
Battery Industry

Research was conducted to quantify the level of copper (Cu), chromium (Cr), cadmium (Cd) and lead (Pb) contamination in battery industry effluent and to assess the remediation potential of three invasive aquatic macrophytes Eichhornia crassipes, Pistia stratiotes and Hydrocotyle umbellata by growing on industrial effluent collected from Lead acid Battery industry.The effluent was heavily contaminated with Pb (10mg/l) and sulphuric acid (pH 2- 2.1). Due to high Pb concentrations and low pH (2-2.2) the plants were unable to survive. Mortality rate of E. crassipes was 96 % while P. stratiotes and H. umbellata were 100% rotten. The experiment was repeated after adjusting the effluent pH to 7-7.5 to increase the plant life.Plant parts and wastewater samples were analyzed after every 3 days interval uptil 21st day. The amount of Cr, Cd and Cu in the effluent was 0.076 mg /L, 0.036 mg /L and 0.097 mg /L, which was in permissible limits of NEQs (1.0 mg/l, 0.1 mg/l and 1.0 mg/l) respectively. Pb was found 10 times higher i.e. 10 mg/l than the permissible limit 0.5 mg/l. E. crassipes removed Pb>Cr>Cu>Cd while P. stratiotes and H. umbellata reduced Cd, Cr, Cu more than Pb from the effluent. E. crassipes was most efficient Pb removing plant in 21 days of experiment.  

scholarly journals The Research on the Construction and the Photocatalytic Performance of BiOI/NH2-MIL-125(Ti) Composite

Catalysts ◽  
2020 ◽  
Vol 11 (1) ◽  
pp. 24
Author(s):  
Juan Du ◽  
Jiaxin Zhang ◽  
Tingyu Yang ◽  
Renming Liu ◽  
Zhiyi Li ◽  
...  
Keyword(s):  
High Stability ◽  
Diffuse Reflectance ◽  
Photocatalytic Performance ◽  
Separation Efficiency ◽  
Solvothermal Method ◽  
Degradation Mechanism ◽  
Active Species ◽  
Absorption Region ◽  
Composite Photocatalyst ◽  
Recombination Efficiency

The BiOI/NH2-MIL-125(Ti) composite photocatalyst with excellent photocatalytic performance was prepared by the solvothermal method. For the BiOI/NH2-MIL-125(Ti) (BNMT) system, the contents of NH2-MIL-125(Ti) in BNMT-4, BNMT-5, BNMT-7, BNMT-9, and BNMT-10 were 4 wt %, 5 wt %, 7 wt %, 9 wt %, and 10 wt %, respectively. XRD, XPS, SEM, and TEM characterizations indicated that BiOI/NH2-MIL-125(Ti) was successfully prepared. Brunauer, Emmett, and Teller (BET) and UV–vis diffuse reflectance spectra photoelectrochemical analysis indicated that BNMT-9 can make the specific surface area and photo absorption region larger than BiOI. In addition, the separation efficiency of photogenerated carriers was improved, and the recombination efficiency was reduced. The degradation percentages of Rhodamine B (RhB) and p-chlorophenol (P-CP) reached 99% and 90% over BNMT-9 under visible light irradiation. Additionally, the catalysts had high stability. The results of the active spices trapping experiments test indicated that h+ was the main active species. The possible degradation mechanism was proposed.

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