scholarly journals Adsorption of tetracycline antibiotics from an aqueous solution onto graphene oxide/calcium alginate composite fibers

RSC Advances ◽  
2018 ◽  
Vol 8 (5) ◽  
pp. 2616-2621 ◽  
Author(s):  
Haotian Zhu ◽  
Tao Chen ◽  
Jingquan Liu ◽  
Da Li
Keyword(s):  
Aqueous Solution ◽  
Graphene Oxide ◽  
Sodium Alginate ◽  
Calcium Alginate ◽  
Freeze Drying ◽  
Cross Linking ◽  
Composite Fibers ◽  
Drying Method ◽  
Tetracycline Antibiotics ◽  
Efficient Adsorbent

In this study, we report the preparation of a novel environmentally friendly and highly efficient adsorbent, graphene oxide/calcium alginate (GO/CA) composite fibers, via a freeze-drying method using calcium chloride as a cross-linking reagent between graphene oxide and sodium alginate.

Removal of Cu(II) Ions from Aqueous Solution Using Fe/La-CTAB-Graphene Oxide Nanocomposite as Efficient Adsorbent

2018 ◽  
Vol 18 (7) ◽  
pp. 4692-4699 ◽  
Author(s):  
Tingshun Jiang ◽  
Mingfeng Dong ◽  
Lu Yan ◽  
Minglan Fang ◽  
Ruifeng Liu
Keyword(s):  
Aqueous Solution ◽  
Graphene Oxide ◽  
Efficient Adsorbent

Cross-linking and modification of sodium alginate biopolymer for dye removal in aqueous solution

2018 ◽  
Vol 76 (7) ◽  
pp. 3535-3554 ◽  
Author(s):  
Akila Merakchi ◽  
Souhila Bettayeb ◽  
Nadjib Drouiche ◽  
Lydia Adour ◽  
Hakim Lounici
Keyword(s):  
Aqueous Solution ◽  
Sodium Alginate ◽  
Dye Removal ◽  
Cross Linking

Preparation of Stable Hydrophilic Polyethyleneimine Cross-Linked Graphene Oxide/Titanium Dioxide Membranes for Dye Separation

NANO ◽  
2021 ◽  
pp. 2150008
Author(s):  
Hongwei Liu ◽  
Jinhua Liu ◽  
Jun Li ◽  
Zhanchao Liu ◽  
Weifu Wu ◽  
...  
Keyword(s):  
Aqueous Solution ◽  
Titanium Dioxide ◽  
Graphene Oxide ◽  
Water Flux ◽  
Cross Linking ◽  
Sunset Yellow ◽  
Water Contact ◽  
Static Water ◽  
The Cross ◽  
The Stability

An excellent novel laminar and hierarchical polyethyleneimine cross-linked graphene oxide/titanium dioxide (GO–TiO2–PEI) membrane was successfully prepared by vacuum filtration technology using polyethyleneimine (PEI) as the cross-linking agent and a GO–TiO2 nanocomposite as the substrate. The resultant membrane (GO–TiO2–PEI) displayed a favorable antifouling performance with bovine serum albumin (BSA) and showed good hydrophilicity and wettability, with a static water contact angle of 13.2∘. The stability of the GO–TiO2–PEI membrane in aqueous solution obviously improved with the cross-linking of PEI compared with that of the GO and GO–TiO2 membranes. The GO–TiO2–PEI membrane also exhibited a satisfactory water flux of 48.6[Formula: see text]L m[Formula: see text] h[Formula: see text] bar[Formula: see text]. The GO–TiO2–PEI membrane exhibited a good performance for effectively separating different dyes including methylene blue (MB), rhodamine B (RB), methyl orange (MO), sunset yellow (SY), new coccine (NC) and amaranth. All the above results suggested that the GO–TiO2–PEI membrane could be used as an excellent stable hydrophilic membrane for efficiently separating dyes from aqueous solution.

Synthesis of spherical porous cross-linked glutaraldehyde/poly(vinyl alcohol) hydrogels

2016 ◽  
Vol 36 (9) ◽  
pp. 891-898
Author(s):  
Sadao Araki ◽  
Yuko Shirakura ◽  
Harufumi Suzuki ◽  
Hideki Yamamoto
Keyword(s):  
Sodium Alginate ◽  
Vinyl Alcohol ◽  
Calcium Alginate ◽  
Chloride Solution ◽  
Calcium Chloride Solution ◽  
Inorganic Salts ◽  
Poly Vinyl Alcohol ◽  
Cross Linking ◽  
Alginate Content ◽  
Calcium Alginate Gels

Abstract Spherical glutaraldehyde cross-linked poly(vinyl alcohol) (PVA) hydrogels (G-PVA) were prepared in three steps: gelatification, cross-linking, and removal of alginate. Gelatification was carried out by dropping a solution of alginate, PVA, and glutaraldehyde into a calcium chloride solution to form calcium alginate. Calcium alginate gels were prepared at 20°C, 40°C, 60°C, and 80°C to study the effect of gelatification temperature on the formation of pores on the surface of G-PVA. The effect of the alginate content was studied. PVA and glutaraldehyde were cross-linked by immersion of the gels in a solution of H2SO4 and Na2SO4. The effect of sodium alginate and inorganic salts, such as MgSO4 and K2SO4, on the formation of pores on the surface of G-PVA was confirmed.

Study on Modified PVA- H3BO3 Immobilization Microorganism Method for Hydrogen Production from Wastewater

2013 ◽  
Vol 634-638 ◽  
pp. 280-285 ◽  
Author(s):  
Lin Deng ◽  
Bing Huang ◽  
Huai Yuan Zhao ◽  
Jia Yao Du ◽  
Ling Gao
Keyword(s):  
Waste Water ◽  
Aqueous Solution ◽  
Hydrogen Production ◽  
Sodium Alginate ◽  
Removal Rate ◽  
Sewage Treatment ◽  
Performance Criterion ◽  
Total Sugar ◽  
Cross Linking ◽  
Modified Method

A new immobilization microorganism (IM) method was built by adding sodium alginate, SiO2 and CaCO3 in gel and cross-linking with saturated H3BO3 aqueous solution with 2% CaCl2 for traditional PVA-H3BO3 method. The modified method was used for preparation IM for hydrogen production from waste water contained organics by sewage treatment plants’ sludge pretreated. The change rate of the IM balls diameter and unit hydrogen production were taken as the primary performance criterion of the IM. The modified IM method for hydrogen production from waste water contained organics was confirmed: 9% PVA and 0.9% sodium alginate for the embedding medium, saturated H3BO3 aqueous solution and 2% CaCl2 for cross-linking agent, and adding NaCO3 adjusting PH, 3%SiO2 and 0.5%CaCO3 for the support packing of IM balls, and the balls diameter of about 3mm. The modified IM balls had unit hydrogen production of 63.3% and total sugar removal rate of 143.4mL/h•L for washing model wastewater from ice cream factory, which contained 2000 mg/L total sugar and 5500mg/L COD, and higher mechanical strength. It were identified that the method could reduce outside surface’s shrink, and improve the homogeneous of inside endoporus structure of modified IM balls, and a similar inside microporosity and outside microporosity by SEM detection.

Porous gold nanoparticle/graphene oxide composite as efficient catalysts for reduction of 4-nitrophenol

RSC Advances ◽  
2016 ◽  
Vol 6 (42) ◽  
pp. 35945-35951 ◽  
Author(s):  
Mengmeng Zhang ◽  
Xuan Lu ◽  
Hao-Yi Wang ◽  
Xiaoli Liu ◽  
Yujun Qin ◽  
...  
Keyword(s):  
Graphene Oxide ◽  
Gold Nanoparticle ◽  
Freeze Drying ◽  
Catalytic Performance ◽  
Drying Method ◽  
Oxide Composite ◽  
Porous Gold ◽  
Oxide Composites ◽  
Method Show

Porous gold nanoparticle/graphene oxide composites obtained through freeze-drying method show superior continuous catalytic performance in the reduction of 4-nitrophenol.

Synergistic effects of a TiNb2O7–reduced graphene oxide nanocomposite electrocatalyst for high-performance all-vanadium redox flow batteries

2018 ◽  
Vol 6 (28) ◽  
pp. 13908-13917 ◽  
Author(s):  
Anteneh Wodaje Bayeh ◽  
Daniel Manaye Kabtamu ◽  
Yu-Chung Chang ◽  
Guan-Cheng Chen ◽  
Hsueh-Yu Chen ◽  
...  
Keyword(s):  
Aqueous Solution ◽  
Graphene Oxide ◽  
High Performance ◽  
Freeze Drying ◽  
Synergistic Effects ◽  
Low Cost ◽  
Redox Flow Batteries ◽  
Reduced Graphene ◽  
Flow Batteries ◽  
Vanadium Redox

In this study, a simple, low-cost, and powerful titanium niobium oxidereduced graphene oxide (TiNb2O7–rGO) nanocomposite electrocatalyst was synthesized through dispersion and blending in aqueous solution followed by freeze-drying and annealing for all-vanadium redox flow batteries (VRFBs).

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