Removal of Dichloroethylene in Water Using a Novel TCAS-Loaded Resin

2013 ◽  
Vol 634-638 ◽  
pp. 334-337
Author(s):  
Miao Miao He ◽  
Xiao Jun Hu ◽  
Yong Biao Peng ◽  
Xin He
Keyword(s):  
Aqueous Solution ◽  
Anion Exchange ◽  
Adsorption Mechanism ◽  
Exchange Resin ◽  
Ph Value ◽  
Anion Exchange Resin ◽  
Operating Temperature ◽  
Removal Rate ◽  
Static Tests ◽  
Loaded Resin

Through the method of the static tests, the removal rate of aqueous dichloroethylene onto a new TCAS-loaded resin was researched. This TCAS-loaded resin was made of a novel supramolecular acceptor compound named thiacalix[4]arenetetrasulfonate(TCAS) and anion exchange resin, and the adsorption mechanism was discussed preliminarily. The results of adsorption indicated that the pH value was an important factor for the removal of dichloroethylene and it would be better for the adsorption if the pH value was greater than 6. The operating temperature should be controlled in 5 to 15°C for the adsorption of dichloroethylene onto TCAS-loaded resin while the removal rate decreased with the temperature increasing and the best time for reaction was 40min. The removal rate of dichloroethylene in aqueous solution was better when 25mL aqueous solution of dichloroethylene (1.0mg/L) was adsorbed by 0.5g TCAS-loaded resin. The dichloroethylene can be resolving and TCAS-loaded resin can be reused.

Adsorption of Aqueous Carbon Tetrachloride by a Novel TCAS-Loaded Resin

2013 ◽  
Vol 743-744 ◽  
pp. 702-705
Author(s):  
Yong Biao Peng ◽  
Xiao Jun Hu ◽  
Hao Wu ◽  
Xin He
Keyword(s):  
Aqueous Solution ◽  
Carbon Tetrachloride ◽  
Adsorption Mechanism ◽  
Exchange Resin ◽  
Ph Value ◽  
Anion Exchange Resin ◽  
Operating Temperature ◽  
Removal Rate ◽  
Static Tests ◽  
Loaded Resin

Through the method of the static tests, the removal rate of aqueous carbon tetrachloride onto a new TCAS-loaded resin was researched. This TCAS-loaded resin was made of a novel supramolecular acceptor compound named thiacalix [arenetetrasulfonate (TCAS) and anion exchange resin, and the adsorption mechanism was discussed preliminarily. The results of adsorption indicated that the pH value was an important factor for the removal of carbon tetrachloride and it would be better for the adsorption if the pH value was greater than 6. The operating temperature should be controlled in 5 to 15°C for the adsorption of carbon tetrachloride onto TCAS-loaded resin while the removal rate decreased with the temperature increasing and the best time for reaction was 40min. The removal rate of carbon tetrachloride in aqueous solution was better when 25mL aqueous solution of carbon tetrachloride (1.0mg/L) was adsorbed by 0.5g TCAS-loaded resin. The carbon tetrachloride can be resolving and TCAS-loaded resin can be reused.

scholarly journals Mg/Al double-metal hydroxide regeneration of anion exchange resin by electric field intensification

2016 ◽  
Vol 75 (6) ◽  
pp. 1309-1318 ◽  
Author(s):  
Ying Wang ◽  
Zhun Li ◽  
Yansheng Li ◽  
Zhigang Liu
Keyword(s):  
Electric Field ◽  
Anion Exchange ◽  
Exchange Resin ◽  
Ph Value ◽  
Anion Exchange Resin ◽  
Cost Effective ◽  
Regenerative Capacity ◽  
Metal Hydroxides ◽  
Anion Exchange Resins ◽  
Exchange Resins

Fouled anion exchange resins were regenerated by electric field intensification of Mg/Al double-metal hydroxides. Regenerative experiments were performed with varying voltages (10–30 V) and dosages of Mg/Al hydroxides (0.045–0.135 mol and 0.015–0.045 mol, respectively) for 1–5 h. Optimal results were obtained under the following regenerative conditions: 20 V, 4 h, and 0.09/0.03 mol of Mg/Al hydroxides. The maximum regenerative capacity of resins was increased to 41.07%. The regenerative mechanism was presented by Fourier-transform infrared spectrum of resins and Mg/Al hydroxides, and the regenerative degree was analyzed with respect to conductivity, pH value, and electric current. Mg/Al hydroxides were also recycled after the regeneration. This method was proven to be cost-effective and environmentally friendly.

scholarly journals Removal of Hexavalent Chromium Ions from Aqueous Solutions by an Anion-Exchange Resin

2008 ◽  
Vol 26 (9) ◽  
pp. 693-703 ◽  
Author(s):  
P. Senthil Kumar ◽  
K. Kirthika ◽  
K. Sathish Kumar
Keyword(s):  
Aqueous Solutions ◽  
Anion Exchange ◽  
Hexavalent Chromium ◽  
Exchange Resin ◽  
Ph Value ◽  
Anion Exchange Resin ◽  
Freundlich Isotherm ◽  
Sorption Process ◽  
Isotherm Models ◽  
Exchange Resins

The removal of hexavalent chromium, Cr(VI), from aqueous solutions under different conditions using an anion-exchange resin (AXR) as an adsorbent was investigated under batch conditions. Such studies indicated that the percentage adsorption decreased with increasing initial Cr(VI) concentration, with the maximum removal of such ions occurred at a pH value of ca. 2.0. Both the Langmuir and Freundlich isotherm models were capable of reproducing the isotherms obtained experimentally. The sorption process was rapid during the first 20 min with equilibrium being attained within 30 min. The process followed first-order kinetics. The results demonstrate that such anion-exchange resins can be used for the efficient removal of Cr(VI) ions from water and wastewater.

A simple method of polyamine purification

1985 ◽  
Vol 38 (4) ◽  
pp. 633 ◽  
Author(s):  
IW Stapleton
Keyword(s):  
Aqueous Solution ◽  
Anion Exchange ◽  
Large Scale ◽  
Exchange Resin ◽  
Anion Exchange Resin ◽  
Simple Procedure ◽  
Crystalline Solid ◽  
Simple Method

A simple procedure for the large-scale purification of commercial polyethyleneamines (H2N[CH2CH2NH]nH where n = 2-5) is described in which the per- tosylate salt separates as a crystalline solid from aqueous solution. The salts require no further purification except for pentaethylenehexamine (n = 5), which requires recrystallization from water. The free bases are regenerated from the tosylate salt by an anion-exchange resin.

scholarly journals Preparation of Anion Exchange Resin Loaded with Ferric Oxide for Arsenic (V) Removal from Aqueous Solution

2017 ◽  
Vol 8 (6) ◽  
pp. 399-403 ◽  
Author(s):  
Sujitra Tandorn ◽  
◽  
Orn-Anong Arqueropanyo ◽  
Wimol Naksata ◽  
Ponlayuth Sooksamiti
Keyword(s):  
Aqueous Solution ◽  
Anion Exchange ◽  
Ferric Oxide ◽  
Exchange Resin ◽  
Anion Exchange Resin

scholarly journals Fast Recovery of Lead from Hydrochloric Acid via a Novel Silica-Supported Anion Exchange Resin for the Determination of 210Pb in Environmental Samples

2020 ◽  
Author(s):  
Lifeng Chen ◽  
Jie Zhang ◽  
Xianwen He ◽  
Manqing Liu ◽  
Qiuyang Wei ◽  
...  
Keyword(s):  
Anion Exchange ◽  
Environmental Samples ◽  
Adsorption Mechanism ◽  
Exchange Resin ◽  
Separation Efficiency ◽  
Anion Exchange Resin ◽  
Chemical Yield ◽  
Flow Speed ◽  
Exchange Capacity ◽  
Hcl Solution

The<b> </b>measurement of <sup>210</sup>Pb is significant in environmental studies. Lead separation in HCl solution is a vital procedure but suffers from poor efficiency with high labor and time costs. To overcome this problem, a novel anion exchange resin was synthesized and characterized by different techniques followed by studies on the adsorption behaviors towards lead in HCl solution. The results suggest that SiPS-N(CH<sub>3</sub>)<sub>3</sub>Cl was successfully prepared with small particle size, low water swelling rate, and large specific surface area. The maximum anion exchange capacity resulted from quaternary amine groups was determined to be 1.0 mmol (Cl<sup>-</sup>)/g.The adsorption activities reached equilibrium within 3 min under selected conditions offering extremely fast adsorption kinetics. The synergistic adsorption mechanism, the multilayer adsorption mechanism, and the competition from co-existing chloride anions were found to be responsible for the lead adsorption performance of SiPS-N(CH<sub>3</sub>)<sub>3</sub>Cl. Column experiments showed that the feeding volume of lead and HCl had impact on the chemical yield regardless of the co-existence of high concentrations of FeCl<sub>3</sub> (90 mM) and a high flow speed (4.0 mL/min). Based on these results, a separation process integrating SiPS-N(CH<sub>3</sub>)<sub>3</sub>Cl and the matched parameters was finally developed and tested. Our work greatly raised the lead separation efficiency in HCl solutions with implications for measuring <sup>210</sup>Pb in environmental samples.

Study on the Sorption of Rhenium by Anion Exchange Resin

2011 ◽  
Vol 201-203 ◽  
pp. 1821-1824
Author(s):  
Hong Zhou Ma ◽  
Xin Zhe Lan ◽  
Yao Ning Wang
Keyword(s):  
Anion Exchange ◽  
Separation Factor ◽  
Exchange Resin ◽  
Anion Exchange Resin ◽  
Exchange Capacity ◽  
Desorption Rate ◽  
Strong Base ◽  
Loaded Resin ◽  
Result Show ◽  
Leaching Solution

Techniques are applied for the sorption of rhenium from the leaching solution of the fume of calcinating molybdenite concentrate by 201×7 strong base anion exchange resin. By analyzing the main ion from the leaching solution be pretreatmented, the 201×7 strong base anion exchange resin be used in experiment. The influencing factors on the sorption were investigated, with medium pH, the existing form of the ion in the solution and the pH are greatly related to the ion exchange capacity , the result show that the resin not only have higher adsorption rate of ReO4-, but also have higher separation factor of ReO4-and MoO42-when the leaching solution was pretreated pH at 9.0. The separation factor of ReO4-and MoO42-reached to 980.5. 5%NH4OH+9%NH4Cl solution is a effective desorption reagent for molybdenum, the desorption rate is 96% and nitric acid solution is a effective desorption reagent for rhenium on the loaded resin after desorpted the MoO42-,the desorption rate of ReO4-is 98%.

Application of a novel quaternized ammonium poly(vinyl alcohol)-based hybrid anion exchange membrane for the removal of Cr(VI) from wastewater

2014 ◽  
Vol 70 (10) ◽  
pp. 1602-1609 ◽  
Author(s):  
Rui Dong ◽  
Jianxun Zhang ◽  
Bingqian Zhou ◽  
Jian Zhou
Keyword(s):  
Aqueous Solution ◽  
Anion Exchange ◽  
Vinyl Alcohol ◽  
Ph Value ◽  
Removal Rate ◽  
Poly Vinyl Alcohol ◽  
Anion Exchange Membranes ◽  
Hybrid Membranes ◽  
Adsorption Model ◽  
Adsorption Amount

Two quaternized ammonium poly(vinyl alcohol) (QPVA)-based hybrid anion exchange membranes were successfully fabricated by using sol–gel method. The mass ratios of QPVA aqueous solution to polydimethyl allyl chloride (PDADMAC) aqueous solution were 4:1 and 2:1, then 10 wt% tetraethyl orthosilicate (TEOS) was added. The obtained membranes were separately designated as QPVA/0.25PDADMAC/0.1TEOSm and QPVA/0.5PDADMAC/0.1TEOSm. The properties for the adsorption removal of Cr(VI) and the effect on the Cr(VI) saturation adsorption amount and removal rate were investigated. Results indicated the adsorption was an exothermal reaction. Thus, low temperature was beneficial for the removal of Cr(VI). Optimal removal of Cr(VI) was achieved using the QPVA/0.5PDADMAC/0.1TEOSm membrane at a pH value of 2. Dynamic simulation was carried out simultaneously to determine if particle diffusion was the sole contributor for the adsorption rate, which was in accordance with the Langmuir isotherm adsorption model. Furthermore, the static adsorption amount (Q0) was 61.77 mg/g, and the efficiency of recycling the hybrid membranes was higher than 90%. Scanning electron microscopy (SEM) characterization showed the surface and the cross-section tightened after the Cr(VI) adsorption, thereby demonstrating the potential application of these hybrid membranes for Cr(VI) removal.

scholarly journals Fast Recovery of Lead from Hydrochloric Acid via a Novel Silica-Supported Anion Exchange Resin for the Determination of 210Pb in Environmental Samples

2020 ◽  
Author(s):  
Lifeng Chen ◽  
Jie Zhang ◽  
Xianwen He ◽  
Manqing Liu ◽  
Qiuyang Wei ◽  
...  
Keyword(s):  
Anion Exchange ◽  
Environmental Samples ◽  
Adsorption Mechanism ◽  
Exchange Resin ◽  
Separation Efficiency ◽  
Anion Exchange Resin ◽  
Chemical Yield ◽  
Flow Speed ◽  
Exchange Capacity ◽  
Hcl Solution

The<b> </b>measurement of <sup>210</sup>Pb is significant in environmental studies. Lead separation in HCl solution is a vital procedure but suffers from poor efficiency with high labor and time costs. To overcome this problem, a novel anion exchange resin was synthesized and characterized by different techniques followed by studies on the adsorption behaviors towards lead in HCl solution. The results suggest that SiPS-N(CH<sub>3</sub>)<sub>3</sub>Cl was successfully prepared with small particle size, low water swelling rate, and large specific surface area. The maximum anion exchange capacity resulted from quaternary amine groups was determined to be 1.0 mmol (Cl<sup>-</sup>)/g.The adsorption activities reached equilibrium within 3 min under selected conditions offering extremely fast adsorption kinetics. The synergistic adsorption mechanism, the multilayer adsorption mechanism, and the competition from co-existing chloride anions were found to be responsible for the lead adsorption performance of SiPS-N(CH<sub>3</sub>)<sub>3</sub>Cl. Column experiments showed that the feeding volume of lead and HCl had impact on the chemical yield regardless of the co-existence of high concentrations of FeCl<sub>3</sub> (90 mM) and a high flow speed (4.0 mL/min). Based on these results, a separation process integrating SiPS-N(CH<sub>3</sub>)<sub>3</sub>Cl and the matched parameters was finally developed and tested. Our work greatly raised the lead separation efficiency in HCl solutions with implications for measuring <sup>210</sup>Pb in environmental samples.

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