Development of a four-zone carousel process packed with metal ion-imprinted polymer for continuous separation of copper ions from manganese ions, cobalt ions, and the constituent metal ions of the buffer solution used as eluent

Jo, S.H.,Park, C.,Yi, S.C.,Kim, D.,Mun, S. Elsevier 2011 Journal of Chromatography A Vol.1218 No.33

A three-zone carousel process, in which Cu(II)-imprinted polymer (Cu-MIP) and a buffer solution were employed as adsorbent and eluent respectively, has been developed previously for continuous separation of Cu<SUP>2+</SUP> (product) from Mn<SUP>2+</SUP> and Co<SUP>2+</SUP> (impurities). Although this process was reported to be successful in the aforementioned separation task, the way of using a buffer solution as eluent made it inevitable that the product stream included the buffer-related metal ions (i.e., the constituent metal ions of the buffer solution) as well as copper ions. For a more perfect recovery of copper ions, it would be necessary to improve the previous carousel process such that it can remove the buffer-related metal ions from copper ions while maintaining the previous function of separating copper ions from the other 2 impure heavy-metal ions. This improvement was made in this study by proposing a four-zone carousel process based on the following strategy: (1) the addition of one more zone for performing the two-step re-equilibration tasks and (2) the use of water as the eluent of the washing step in the separation zone. The operating conditions of such a proposed process were determined on the basis of the data from a series of single-column experiments. Under the determined operating conditions, 3 runs of carousel experiments were carried out. The results of these experiments revealed that the feed-loading time was a key parameter affecting the performance of the proposed process. Consequently, the continuous separation of copper ions from both the impure heavy-metal ions and the buffer-related metal ions could be achieved with a purity of 91.9% and a yield of 92.8% by using the proposed carousel process based on a properly chosen feed-loading time.

구리이온(Cu++)이 물벼룩의 만성독성에 미치는 영향; Daphnia magna, Daphnia sp. and Moina macrocopa

김규리 ( Kyu Ri Kim ),김금용 ( Keum Yong Kim ),이상일 ( Sang Ill Lee ) 한국수처리학회 2011 한국수처리학회지 Vol.19 No.4

This study was focused on the estimation of the effect of copper ions on the chronical ecotoxicity of water fleas including Daphnia sp., Moina macrocopa and Daphnia magna. With long term exposure of copper ions, rates of growth, reproduction and transformation of each species were examined. Experiments were carried out for over 21days for Daphnia magna and Daphnia sp. and over 10days for Moina macrocopa with concentration of copper ions of 0, 1, 3, 5, 10 ug/L in culture media. There was decreasing tendency of the survival rate observed of water fleas, as the increase of copper ion concentration in culture media. The time required for first birth of water fleas was less in Moina macrocopa, followed by Daphnia sp. and Daphnia magna. But, longer periods were required with increase of copper ions in every species. For testing period, the number of transformation of every species was decreased with the increase of copper ion. Rapid decrease of transformation rate was observed at Daphnia magna and Daphnia sp. with increase of copper ions. The size of neonates, born from the survived adult water flea was significantly smaller with increase of toxic concentration. Also, the number of water flea produced per day was decreased in the order of Daphnia magna, Daphnia sp. and Moina macrocopa. Also, the death rate of neonate was increased with increase of copper ions in order of Daphnia magna > Daphnia sp. > moina macrocopa. The sensitivity of tested water fleas for the toxicant(Cu) was in order of Daphnia magna > Daphnia sp. > moina macrocopa.

합성 Goethite에 의한 인산이온, 황산이온 및 구리이온의 흡착 특성

김정두,유수용,문명준,감상규,주창식,이민규 한국환경과학회 2003 한국환경과학회지 Vol.12 No.9

Adsorption of phosphate, sulfate, and copper ion to goethite was investigated. Goethite was prepared in the alkaline solution. In the single adsorbate systems, the final equilibrium plateau reached within 20 min. The adsorption isotherms of the individual ions could be well described by the Langmuir equation. The maximum adsorption capacities (q_(max)) were calculated as 0.483 mmol/g and 0.239 mmol/g at pH 3 for phosphate and sulfate ion, and 0.117 mmol/g at pH 6 for copper ion, respectively. In competitive adsorption system with phosphate and sulfate, phosphate ion was a stronger competitor for adsorption on goethite than sulfate ion, which was consistent with higher affinity of phosphate ion for the surface compared to sulfate ion. The existence of sulfate ion enhanced the adsorption of copper ion but the adsorption of sulfate was inhibited when copper ion was present.

수질환경에서 광섬유 센서의 구리 이온 감지 물질로서 8-Hydroxyquinoline 합성유도체의 광학적 반응 특성 연구

김범규(Beom Kyu Kim),박병기(Byung Gi Park) 한국산학기술학회 2017 한국산학기술학회논문지 Vol.18 No.12

수질환경에서 구리이온을 검출하기 위하여 광섬유 센서의 구리 이온 감지 물질로 8-Hydroxyquinolin-2carboxaldehyde와 4-Aminoantipyrine으로 합성된 8-Hydroxyquinoline 합성유도체에 대해 광학적 반응 특성을 조사하였다. 실험은 광섬유를 이용한 측정시스템을 이용하여 수용액에 용해된 구리 이온의 농도에 대해 합성유도체에 의한 흡광도와 관계를 평가하기 위하여 수행되었다. 8-Hydroxyquinoline 합성유도체는 수질 환경에서 다양한 금속 이온들 중에서 구리 이온에 대해 노란색에서 붉은색으로 변화되는 높은 발색 현상을 나타냈으며 530 nm의 고유 흡광 파장을 보였다. 제작된 합성유도체의 Cu 이온에 대한 선택성을 평가하기 위하여 Hg 이온의 영향을 조사하였다. Cu와 Hg 이온의 다양한 농도 비 (Cu:Hg ratio 0.05부터 20까지)에서 흡광도를 측정한 결과, Cu 이온의 농도 증가에 따라 530nm에서 흡광도가 증가하는 경향을 보였다. 구리 이온의 고유 흡광 파장인 530 nm에서 합성 유도체에 의한 흡광도 세기는 구리 이온의 로그 농도에 선형으로 비례하였다. 따라서 8-Hydroxyquinoline합성유도체는 광섬유 센서의 구리 이온 감지 물질로 우수한 특성을 보임을 실험적으로 확인할 수 있었다. An 8-hydroxyquinoline compound that was synthesized with 8-hydroxyquinoline-2-carboxaldehyde and 4-aminoantipyrine was investigated for use as the sensing material of a fiber-optic copper ion sensor in an aqueous environment. The experiment was conducted with a fiber-optic measurement system, in order to evaluate the relationship between the absorbance peak and copper ion concentration. The synthesized derivative exhibited a (highly selective) chromogenic phenomenon for copper ions among various metal ions in an aqueous environment and showed a specific absorbance peak at a wavelength of 530 nm for copper ions. The effect of mercury ions was investigated to evaluate the selectivity of the prepared synthesized derivatives toward Cu ions. The absorbance was measured at various concentration ratios of Cu and Hg ions (Cu:Hg ratios from 0.05 to 20), and it was found that the absorbance at 530 nm tended to increase with increasing Cu ion concentration. The experimental results also showed the linear relationship between the logarithmic concentration of copper ions and the specific absorbance peak at a wavelength of 530 nm. These results indicate that the synthesized 8-hydroxyquinoline compound has selectivity for copper ions and can be used as a sensing material for fiber-optic copper ion sensors.

밤나무 재활용에 의한 구리 이온의 생물흡착

홍성수 ( Seong Soo Hong ) 한국공업화학회 2014 공업화학 Vol.25 No.3

In this present study, Castanea crenata was found as an excellent biosorbent for the removal capability of copper ions amongfour different wood wastes (Castanea crenata, Pinus densiflora, Larix kaemoferi and Robinia pseudoacaia). Also, the removalefficiencies of 5, 10, 20, 40 and 50 mg/L copper ions using Castanea crenata from aqueous solution were investigated. Themost effective particle size of Castanea crenata for removing 5 mg/L copper ions was found to be 43∼63 μm. When theconcentration of Castanea crenata increased, the removal efficiencies of copper ions were enhanced. In addition, when the0.8 g/100 mL of Castanea crenata was used for 30 min, the removal efficiencies of 20 and 40 mg/L copper ions were 99%and 85%, respectively. Moreover, the chemical treatment of Castanea crenata with 1 M sodium acetate was required to improvethe removal ability for 50 mg/L copper ions. Meanwhile, 1 M hydrochloric acid was selected as the optimal desorptionagent with 93% desorption efficiency of copper ions for recycling of modified Castanea crenata. Therefore, these experimentalresults could be employed as economical and practical engineering data for the development of copper removal processes.

CU⁺ ION EXTRACTION FROM A MODIFIED BERNAS ION SOURCE IN A METAL-ION IMPLANTER

IN-SEOK HONG,HWA-RYUN LEE,TU ANH TRINH,YONG-SUB CHO 한국원자력학회 2009 Nuclear Engineering and Technology Vol.41 No.5

An ion implanter, which can serve as a metal-ion supply, has been constructed and performance tested. Copper ions are generated and extracted from a Bernas ion source with a heating crucible that provides feed gases to sustain the plasma. Sable arc plasmas can be sustained in the ion source for a crucible temperature in excess of 350 °C. Stable extraction of the ions is possible for arc currents less than 0.3 A. Arc currents increase with the induced power of a block cathode and the transverse field in the ion source. Cu+ ions in the extracted beam are separated using a dipole magnet. A 20 μA Cu+ ion current can be extracted with a 0.2 A arc current. The ion current can support a dose of 1016 ions/ cm² over an area of 15 cm2 within a few hours.

Copper ion removal using medicinal stones with magnetite

전충 한국공업화학회 2016 한국공업화학회 연구논문 초록집 Vol.2016 No.0

To improve efficiency of adsorption process, magnetically modified medicinal stones (MMS) was developed by means of entrapment method with iron oxide and urethane. The MMS had the maximum uptake capacity of about 13.6 mg/g-dry mass for copper ions at pH 6. The adsorption mechanism can be explained as ion exchange between alkali earth metals and copper ions. The surface condition and adsorption of copper ions onto MMS was confirmed by ESEM and EDAX. MMS could remove copper ions of about 93% with 1.5g and the adsorption equilibrium of MMS was faster than that of commercial ion exchange resin (IR-120 plus resin) by about 50min.

Transduction Efficacy of Tat-Cu,Zn-Superoxide Dismutase Is Enhanced by Copper Ion Recovery of the Fusion Protein

음원식,In Soon Choung,A Yeon Kim,Yong Je Lee,Jung Hoon Kang,Jinseu Park,Kil Soo Lee,Hyeok Yil Kwon,최수영 한국분자세포생물학회 2002 Molecules and cells Vol.13 No.2

We previously reported that Tat-Cu,Zn-superoxide dismutase (Tat-SOD) can be directly transduced into mammalian cells across the lipid membrane barrier. To enhance the therapeutic potential of Tat-SOD for the treatment of various disorders that are related to this antioxidant enzyme, the transduction efficacy of Tat-SOD should be heightened. Therefore, we investigated whether copper ion recovery of the fusion protein could enhance the transduction potential of Tat- SOD in cultured HeLa cells. The results showed that the transduction potential of Tat-SOD was markedly enhanced by copper ions, and moderately increased by zinc ions. Compared with Tat-SOD, the Tat-SOD that recovered the copper ion (CR-Tat-SOD) achieved a significant increase in intracellular concentration and enzymatic activity. Therefore, CR-Tat-SOD was transduced into HeLa cells in a rapid saturation manner, but Tat-SOD was shown in a time-dependent manner. With the higher transduction efficacy of CR-Tat-SOD than that of Tat-SOD, the transduced CR-Tat-SOD significantly increased the viability of HeLa cells that were pretreated with paraquat, an intracellular superoxide anion generator. Although the mechanism of the enhanced transduction of Tat-SOD by copper ions is still unanswered, these results indicate that copper ions facilitate the transduction of SOD. These then significantly increase the biological effectiveness of this antioxidant enzyme.

Removal of copper ion using rice hulls

전충 한국공업화학회 2011 Journal of Industrial and Engineering Chemistry Vol.17 No.3

Rice hulls which have some functional groups like hydroxyl, carboxyl and amino groups were used as an adsorbent to remove copper ions. The functional groups and composition of elements in rice hulls were confirmed by the FT-IR and elemental analysis. Rice hulls had a high uptake capacity of 0.18 mmol/g-dry mass for copper ion at pH 4 and regression curve using Langmuir isotherm equation fit well with the experimental data. The effects of pH, loading amount, time, and organic material (NTA) on uptake capacity of copper ions were investigated. The optimal pH for copper ion uptake was the 4 and rice hulls could remove copper ions of about 33% with 5.0 g of loading amount. Adsorption process of copper ions was almost completed in 30 min and effect of NTA on copper uptake capacity was very small in low concentration (<100 mg/L).

Inactivation of biofilms on RO membranes by copper ion in combination with norspermidine

Lee, H.J.,Seo, J.,Kim, M.S.,Lee, C. Elsevier Scientific Pub. Co 2017 Desalination Vol. No.

Biofouling is one of the most important factors that degrade the performance of reverse osmosis (RO) membranes during the desalination process. This study demonstrates that copper ion (Cu(II) or Cu(II) plus hydroxylamine (HA) to produce Cu(I)) in combination with norspermidine (Nspd) can effectively inactivate bacterial biofilms on RO membranes. The addition of Nspd inhibited the inactivation of planktonic P. aeruginosa cells by copper ion. However, with respect to the cells in biofilms (grown in CDC reactors), the use of Nspd enhanced the cell inactivation by copper ion; the addition of Nspd increased the inactivation efficacies of Cu(II) and Cu(II)/HA against biofilm cells from 2.4 to 3.1 and from 1.3 to 3.5 (log inactivation in 1h), respectively. Nspd disrupted extracellular polymeric substances (as evidenced by the removal of proteins and polysaccharides from biofilms), and it is believed to facilitate the penetration of copper ion into the biofilm matrix. These results showed that the Cu(II)/HA/Nspd treatment also inactivated biofilms in pressurized cross-flow RO filtration units, resulting in partial recovery of permeate flux. However, pretreatment using Nspd (and the subsequent treatment by copper ion) was not as effective as the simultaneous use of Nspd and copper ion in both CDC reactors and cross-flow filtration units.