Amyloid-Like Assembly Converting Commercial Proteins to Water-Insoluble Adsorbents with Ultrahigh Adsorption Capacity and Ultrafast Adsorption Rate for Uranium Extraction

2021 ◽  
Author(s):  
Hao Ye ◽  
Chang Liu ◽  
Ming-Bang Wu ◽  
Lu-Lin Ma ◽  
Shi-Cheng Liu ◽  
...  
Keyword(s):  
Adsorption Capacity ◽  
Nuclear Industry ◽  
Adsorption Rate ◽  
Uranium Extraction ◽  
Promising Strategy

Uranium extraction from seawater was regarded as the most promising strategy for solving the concerns in the increasing demands during the nuclear industry. Inspired by the functional proteins of natural...

scholarly journals Ginger Straw Waste-Derived Porous Carbons as Effective Adsorbents toward Methylene Blue

Molecules ◽  
2019 ◽  
Vol 24 (3) ◽  
pp. 469 ◽  
Author(s):  
Wenlin Zhang ◽  
Huihe Li ◽  
Jianmin Tang ◽  
Hongjia Lu ◽  
Yiqing Liu
Keyword(s):  
Methylene Blue ◽  
Porous Materials ◽  
Adsorption Capacity ◽  
Adsorption Rate ◽  
Dye Wastewater ◽  
Porous Carbons ◽  
High Adsorption ◽  
New Approach ◽  
High Adsorption Capacity

In this work, ginger straw waste-derived porous carbons, with high adsorption capacity, high adsorption rate, and good reusability for removing the toxic dye of methylene blue from wastewater, were prepared by a facile method under oxygen-limiting conditions. This study opens a new approach for the utilization of ginger straw waste, and the porous materials can be employed as great potential adsorbents for treating dye wastewater.

scholarly journals CO2 Adsorption and Desorption by Waste Ion-Exchange Resin–Based Activated Carbon on Fixed Bed

2021 ◽  
Vol 9 ◽  
Author(s):  
Mengqi Wei ◽  
Qiuyue Zhao
Keyword(s):  
Activated Carbon ◽  
Ion Exchange ◽  
Adsorption Capacity ◽  
Gas Flow ◽  
Exchange Resin ◽  
Ion Exchange Resin ◽  
Adsorption Rate ◽  
Adsorption And Desorption ◽  
Product Gas ◽  
Adsorption Temperature

The waste ion-exchange resin–based activated carbon (WIRAC) was utilized for CO2 adsorption. The effect of adsorption temperature, gas flow, CO2 concentration, and adsorbent filling content on CO2 adsorption properties of WIRAC and the effect of desorption temperature and sweep gas flow on CO2 desorption performances of WIRAC were researched. In the adsorption process, with the increase of adsorption temperature, the CO2 adsorption capacity and adsorption rate decrease; as the gas flow increases, the CO2 adsorption capacity decreases, but the adsorption rate increases; with the increase of CO2 concentration and adsorbent filling content, the CO2 adsorption capacity and adsorption rate both increase. In the desorption process, the higher the desorption temperature and the smaller the sweep gas flow, the higher the CO2 purity of product gas and the longer the desorption time. In order to make sure the adsorbent be used efficiently and the higher CO2 concentration of product gas, the adsorption and desorption conditions selected should be a suitable choice.

Optimizing zirconium metal–organic frameworks through steric tuning for efficient removal of Cr2O72−

2020 ◽  
Vol 56 (72) ◽  
pp. 10513-10516
Author(s):  
Xiurong Zhang ◽  
Weidong Fan ◽  
Mingyue Fu ◽  
Weifeng Jiang ◽  
Kebin Lu ◽  
...  
Keyword(s):  
Synergistic Effect ◽  
Adsorption Capacity ◽  
Functional Groups ◽  
Metal Organic Frameworks ◽  
Adsorption Rate ◽  
Porous Structures ◽  
Efficient Removal ◽  
Metal Organic ◽  
Zirconium Metal

Three Zr-based MOFs are obtained through steric tuning. The synergistic effect between porous structures and functional groups enhanced the adsorption capacity and adsorption rate for Cr2O72−.

Preparation of submicron ion-exchange fibers and application in copper ions removal from aqueous solutions

e-Polymers ◽  
2010 ◽  
Vol 10 (1) ◽  
Author(s):  
Shuqin Feng ◽  
Xinyuan Shen
Keyword(s):  
Ion Exchange ◽  
Adsorption Capacity ◽  
Copper Ions ◽  
Removal Rate ◽  
Toxic Metal ◽  
Adsorption Rate ◽  
Maximum Adsorption Capacity ◽  
High Porosity ◽  
Spectroscopy Analysis ◽  
Sem Images

AbstractThe submicron ion-exchange fibers (IEF) of polystyrene (PS) and styrene-isoprene-styrene block copolymer (SIS) blends (80/20, w/w) obtained by electrospinning technology were further sulfonated with sulfuric acid to produce strong acidic cation ion exchange fibers. Scanning electron microscopy (SEM) images showed that there were obvious increase in the diameters, scratches, cracks, and micro-pores on the rough IEF surface. Fourier transform infrared (FTIR) spectroscopy analysis showed there were many sulfonated acid groups introduced onto the benzene wreath of styrene. The maximum adsorption capacity and the adsorption rate of copper ions were carried out and their removal rate determined by spectrophotometry. The results of the adsorption for copper ions showed that submicron IEF from PS/SIS blends with a high porosity (85%) and a high specific surface (760 m2/g) possess a rapid adsorption rate and a high ion adsorption amount (305.9 mmg/g). This high adsorption capacity suggests that the IEF can be efficiently applied to filter out toxic metal ions, and has excellent efficiency to remove copper ions from aqueous solution.

scholarly journals Study of Equilibrium and Kinetics of Pb(II) in Solution Using Persimmon Tannin Gel as an Adsorbent

2019 ◽  
Vol 22 (6) ◽  
pp. 310-316 ◽  
Author(s):  
Thamrin Azis ◽  
La Ode Ahmad ◽  
Fajrin E. Rosa ◽  
Laode Abdul Kadir
Keyword(s):  
Metal Ions ◽  
Adsorption Capacity ◽  
Adsorption Rate ◽  
Maximum Adsorption Capacity ◽  
Physical Interaction ◽  
Adsorption Method ◽  
Kinetics Of Adsorption ◽  
Equilibrium And Kinetics ◽  
Adsorption Rates ◽  
Kinetics Of

Heavy metals concentrations exceeding the recommended threshold are hazardous for the environment, so there is a need for handling it safely. The purpose of this research was to determine the adsorption capacity and kinetics of adsorption. This research uses an adsorption method in the process of removing Pb(II) heavy metal ions using persimmon tannin gel. Besides the influence of contact time, pH, and the concentration of Pb(II) metal ions on adsorption, a kinetics study was also carried out. The adsorption rate is obtained through the adsorption rate constant (K) and the reaction order generated from the kinetics model. Based on the results of the research, showed the optimum adsorption process, which is 20 minutes and at a pH of 5. The maximum adsorption capacity of 17.62 mg/g with the value of the standard energy changes of Gibbs adsorption (-ΔG° = -14.274 kJ/moll) indicates that the adsorption takes place through physical interaction. The kinetic adsorption gives the adsorption rates a constant of, k = 0.008231 g/mg.min.

A 3D ordered hierarchically porous non-carbon electrode for highly effective and efficient capacitive deionization

2019 ◽  
Vol 7 (26) ◽  
pp. 15633-15639 ◽  
Author(s):  
Yuchen Wu ◽  
Gaopeng Jiang ◽  
Guihua Liu ◽  
Gregory Lui ◽  
Zachary Paul Cano ◽  
...  
Keyword(s):  
Titanium Nitride ◽  
Adsorption Capacity ◽  
Porous Titanium ◽  
Adsorption Rate ◽  
Carbon Electrode ◽  
Capacitive Deionization ◽  
Hierarchically Porous ◽  
Highly Effective ◽  
Ordered Porous

A nanoengineered 3D hierarchical ordered porous titanium nitride electrode is applied as an effective and efficient non-carbon electrode to deliver outstanding salt adsorption capacity and record-breaking salt adsorption rate in a capacitive deionization cell.

Removal of Fluoride on Chitosan Coated Alumina (CAL) from Aqueous Solution

2012 ◽  
Vol 518-523 ◽  
pp. 797-800 ◽  
Author(s):  
Xuan Lin Tang ◽  
Huan Zhen Zhang ◽  
Shuang Zhao ◽  
Shu Fen Gong
Keyword(s):  
Aqueous Solution ◽  
Adsorption Capacity ◽  
Contact Time ◽  
Adsorption Rate ◽  
Fluoride Removal ◽  
Batch Experiments ◽  
Solution Ph ◽  
Initial Concentration ◽  
Adsorbent Dosage ◽  
Naoh Solution

CAL beads were made by dropping wise mixture of chitosan and alumina into NaOH solution. Effects of contact time, adsorbent dosage, initial concentration and pH on fluoride removal were carried out by batch experiments. Results show that adsorption rate was relatively rapid in the first 6 h, thereafter distinctly decreased until adsorption reached the equilibrium within 48 h, at this time, adsorption capacity was up to 0.67 mg/g, which was much higher than raw chitosan (0.052 mg/g). Fluoride removal increased significantly with an increase of adsorbent dosage, however, it rose slowly when the adsorbent dosage was above 16 g/L. Adsorption capacity reduced from 0.75 mg/g to 0.64mg/g when solution pH rose from 4 to 7, nevertheless, adsorption was relatively independent on solution pH between 7 and 10.

Study on the Adsorption-Desorption Behavior of Cr in Soil as Affect by Zeolite

2011 ◽  
Vol 414 ◽  
pp. 32-38
Author(s):  
Xin Ke ◽  
Guang Zhen Xu ◽  
Lin Lin Niu ◽  
Xin Zhao ◽  
Run Dong Li ◽  
...  
Keyword(s):  
Adsorption Capacity ◽  
Experimental Model ◽  
Adsorption Rate ◽  
Laboratory Simulation ◽  
Desorption Rate ◽  
Freundlich Equation ◽  
Elovich Equation ◽  
Adsorption Desorption

Under laboratory simulation experimental model, through adding exogenous chromium and CaCl2 solution, we research adsorption, desorption characteristics of Cr in soils with or without fixative (zeolite). Research shows that: The soil with zeolite can increase adsorption capacity of soil for Cr, it can also reduce the desorption quantity of Cr. In thermodynamics experiment, Freundlich equation is one of the best model to describe adsorption、desorption characteristics for Cr in soil with or without zeolite.; In kinetics experiment, adding zeolite to soil could increase adsorption rate for Cr and decrease the desorption rate for Cr ,we could use Elovich equation to describe adsorption、desorption characteristics of soils with or without zeolite for Cr.

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