Study on Enhancement Adsorption of Pipemidic Acid from Aqueous Solution by Using an Amino Group Modified Hypercrosslinked Polymeric Adsorbents

2012 ◽  
Vol 468-471 ◽  
pp. 1239-1242
Author(s):  
Jiang Quan Ma ◽  
Jun Hao Xia ◽  
Qing Ling Lu ◽  
Peng Xiang Shi ◽  
Lu De Lu ◽  
...  
Keyword(s):  
Aqueous Solution ◽  
Entropy Change ◽  
Amino Group ◽  
Pipemidic Acid ◽  
Adsorption Ability ◽  
Freundlich Model ◽  
Polymeric Adsorbent ◽  
Hypercrosslinked Polymeric Adsorbent ◽  
Ph Range ◽  
Positive Effect

In the present study, an amino group modified hypercrosslinked polymeric adsorbent RDM-200 was prepared and its ability to adsorb pipemidic acid from aqueous solution was tested by using Amberlite XAD-4 as a comparison. Pipemidic acid adsorption isotherm onto RDM-200 is well described by the Freundlich model. The RDM-200 adsorption capacity for PPA was about 510.5 mg/g at 293 K, exhibited larger uptake and stronger affinity of pipemidic acid than XAD-4. The adsorption thermodynamic parameters were calculated and the adsorption was an exothermic, favorable, and more ordered process. The RDM-200 spontaneously adsorbs pipemidic acid mainly by both entropy change and enthalpy change. The RDM-200 exhibited excellent adsorption ability over the pH range 6-10, NaCl showed the positive effect.

scholarly journals Adsorption of Phenol from Aqueous Solution by Aminated Hypercrosslinked Polymers

2005 ◽  
Vol 23 (4) ◽  
pp. 335-346 ◽  
Author(s):  
Yue Sun ◽  
Jin-Long Chen ◽  
Ai-Min Li ◽  
Fu-Qiang Liu ◽  
Quan-Xing Zhang
Keyword(s):  
Aqueous Solution ◽  
Adsorption Process ◽  
Kinetic Studies ◽  
Amino Group ◽  
Commercial Resin ◽  
The Matrix ◽  
Basic Anion Exchange Resin ◽  
Tertiary Amino ◽  
Basic Anion ◽  
Hypercrosslinked Polymeric Adsorbent

The adsorption of phenol from aqueous solution onto the hypercrosslinked polymeric adsorbent NDA-100 and its dimethylamine aminated derivatives AH-1, AH-2 and AH-3, the commercial resin Amberlite XAD-4 and the weakly basic anion-exchange resin D301 was compared. Of the tested polymers, the aminated hypercrosslinked resins had the highest adsorption capacities. The empirical Freundlich equation was successfully employed to describe the adsorption process. The specific surface area and the micropore structure of the adsorbent together with the tertiary amino group on the matrix affected the adsorption performance towards phenol. Furthermore, these factors also influenced the thermodynamic properties. Kinetic studies demonstrated that the presence of the tertiary amino group on the polymer matrix decreased the adsorption rate and increased the apparent activation energy of the adsorption process.

scholarly journals Adsorption of Aromatic Compounds from Aqueous Solution by a Hypercrosslinked Polymeric Adsorbent with Sulphonic Groups

2003 ◽  
Vol 21 (10) ◽  
pp. 921-933 ◽  
Author(s):  
Hai-Ling Wang ◽  
Jin-Long Chen ◽  
Ai-Min Li ◽  
Zhi-Cai Zhai ◽  
Zheng-Hao Fei ◽  
...  
Keyword(s):  
Aqueous Solution ◽  
Aromatic Compounds ◽  
Polymeric Adsorbent ◽  
Hypercrosslinked Polymeric Adsorbent

Adsorption of Benzene and Aniline Using a Novel Hypercrosslinked Polymeric Adsorbent Modified by Phenolic Hydroxyl Group

2013 ◽  
Vol 575-576 ◽  
pp. 130-134
Author(s):  
Xin Hua Yuan ◽  
Wen Hua Guo ◽  
Yan Lei ◽  
Yong Qiang Liu ◽  
Ji Ye Wu ◽  
...  
Keyword(s):  
Aqueous Solution ◽  
Hydrogen Bond ◽  
Chemical Interaction ◽  
Liquid Paraffin ◽  
Phenolic Hydroxyl ◽  
Hydroxyl Group ◽  
Physical Interaction ◽  
Crosslinking Reaction ◽  
Polymeric Adsorbent ◽  
Hypercrosslinked Polymeric Adsorbent

Using gelatin as dispersant, liquid paraffin as porogen, novel hypercrosslinked polymeric adsorbents of LM-5 and LM-6 were prepared by post-crosslinking reaction with phenol and 2-naphthol, respectively. Bromoethane was used as crosslinking reagent to substitute poisonous organic compound of chloromethyl methylether. 2-Naphthol was used in the post-crosslinking reaction to enhance phenolic hydroxyl group content. The experiments of selective adsorbing aniline on resins in mixture solution, which consisting of benzene and aniline, show that the adsorption of aniline and benzene on LM-6 in aqueous solution are mainly pushed by physical interaction. The adsorption of aniline is also partly pushed by chemical interaction, and the adsorptive enthalpy illuminates that there exists hydrogen-bonding. Owning to the hydrogen-bond, the adsorption capacity of aniline on LM-6 is markedly higher than that of benzene.

scholarly journals Adsorption of 3-Chloroaniline on Potato Skin in Aqueous Solution

2016 ◽  
Vol 2016 ◽  
pp. 1-7
Author(s):  
Nidhal S. Mohammed ◽  
T. H. Flowers ◽  
H. J. Duncan
Keyword(s):  
Aqueous Solution ◽  
Ionic Strength ◽  
Experimental Conditions ◽  
Freundlich Model ◽  
Fresh Potato ◽  
Adsorption Capacities ◽  
Equilibrium Data ◽  
Basic Solutions ◽  
Potato Skin ◽  
Ph Range

The adsorption behaviour of aromatic amine 3-chloroaniline (3-CA) from aqueous solution on fresh potato skin was investigated. A series of batch experiments were conducted under different experimental conditions of contact time, 3-chloroaniline concentration, weight of potato skin, pH, temperature, and ionic strength using RP-HPLC analysis. Adsorption equilibrium of 3-chloroaniline at concentration of 10 µg/mL on 1 g weight of chopped potato skin was achieved in 24 hours. Using different varieties of potato skin showed that the adsorption of 3-CA on Nicola variety is higher compared to Sante and Maris Peer varieties. Adsorption on potato skin was found to be generally higher compared to cortex and pith tissues. Analysis of adsorption isotherm shows that equilibrium data was fitted to Freundlich model (R2=0.977). Maximum adsorption capacities of 3-chloroaniline were found in the pH range from 3 to 9, whereas low adsorption quantities were found in high acidic and high basic solutions (pH 2 and pH 13, resp.). Adsorption capacity increased with an increase in temperature from 4°C to 30°C but decreased with further increase of temperature to 40°C. Testing the ionic strength showed that increasing the concentration of electrolyte reduces the adsorption efficiency. This study indicated that the fresh potato skin (without any treatment) is possible to use as a new adsorbent for removal of 3-chloroaniline from industrial waste water.

Chromium Removal from Aqueous Solution by Microwave-Modified Phosphogypusum

2014 ◽  
Vol 955-959 ◽  
pp. 16-20 ◽  
Author(s):  
Ping Ning ◽  
Lei Shi ◽  
Yue Hong Yang ◽  
Yang Cheng
Keyword(s):  
Aqueous Solution ◽  
Contact Time ◽  
Adsorption Process ◽  
Maximum Adsorption Capacity ◽  
Solution Ph ◽  
Freundlich Model ◽  
Chromium Vi ◽  
Removal Capacity ◽  
Ph Range ◽  
Best Fit

The removal of chromium (VI) ions from aqueous solution by microwave-modified phosphogypsum was studied. The removal capacity of microwave-modified phosphogypsum for chromium (VI) ions was examined as a function of solution pH, contact time, adsorbent dosage. Before a series of the adsorption studies, phosphogypsum was pre-conditioned with microwave. It was observed that the adsorption of the chromium (VI) ions onto the phosphogypsum in the pH range of 2 and 11. The chromium (VI) adsorption process was described with the Langmuir and Freundlich theories, and the Freundlich model indicated the best fit to the adsorption process. Maximum adsorption capacity of microwave-modified phosphogypsum was found to be 3.126 mg g−1. The results proved that the microwave-modified phoshogypsum is a suitable adsorbent for the removal of chromium (VI) ions from aqueous solution.

REMOVAL OF HEAVY METAL Cr (II), Ni (II), Cu (II), Zn (II), Cd (II), Pb (II) IONS FROM AQUEOUS SOLUTION BY MENTHA PIPERITA EXTRACT

2020 ◽  
pp. 15-20
Author(s):  
Ersin Yucel ◽  
Mine Yucel
Keyword(s):  
Aqueous Solution ◽  
Metal Ions ◽  
High Efficiency ◽  
Correlation Coefficients ◽  
Langmuir Model ◽  
Mentha Piperita ◽  
Freundlich Model ◽  
Biosorption Capacity ◽  
Peppermint Extract ◽  
The Stability

In this study, the usage of the peppermint (Mentha piperita) for extracting the metal ions [Mg (II), Cr (II), Ni (II), Cu (II), Zn (II), Cd (II), Pb (II)] that exist at water was investigated. In order to analyze the stability properties, Langmuir, Freundlich, Temkin and Dubinin-Radushkevich isotherms were used at removing the metal ions and the highest correlation coefficients (R2) were obtained at Langmuir isotherm. Therefore, it is seen that the Langmuir model is more proper than the Freundlich model. However, it was found that the correlation coefficients of removing Ni and Cd is higher at Freundlich model than Langmuir and low at Dubinin-Radushkevich isotherm. It is established that the biosorption amount increase depends on the increase of biosorbent and it can be achieved high efficiency (95%) even with small amount (0.6 mg, peppermint extract) at lead ions. It is also determined that the peppermint extracted that is used at this study shows high biosorption capacity for metal ions and can be used for immobilization of metals from polluted areas.

Breakthrough analysis for hexavalent chromium removal from drinking water in a fixed bed column

2009 ◽  
Vol 9 (6) ◽  
pp. 661-670 ◽  
Author(s):  
S. P. Dubey ◽  
K. Gopal
Keyword(s):  
Aqueous Solution ◽  
Hexavalent Chromium ◽  
Fixed Bed ◽  
Entropy Change ◽  
Spectroscopic Technique ◽  
Fixed Bed Column ◽  
Chromium Vi ◽  
Fixed Bed Adsorption ◽  
Optimal Column ◽  
Eucalyptus Bark

The activated carbon of Eucalyptus globulus was tested for their effectiveness in removing hexavalent chromium from aqueous solution using column experiments. Result revealed that adsorption of chromium(VI) on eucalyptus bark carbon was endothermic in nature. Thermodynamic parameters such as the entropy change, enthalpy change and Gibbs free energy change were found to be 1.39 kJ mol−1 K−1, 1.08 kJ mol−1 and −3.85 kJ mol−1, respectively. Different chromium concentrations were used for the fixed bed adsorption studies. The pre- and post-treated adsorbents were characterized using a FTIR spectroscopic technique. It was concluded that Eucalyptus bark carbon column could be used effectively for removal of hexavalent chromium from aqueous solution at optimal column conditions. This study showed that this biological material is potential adsorbent of Cr(VI) from water.

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