Earticle

전해수란 “ê수도수나 묽은 식염수 등을 약한 직류전압에서 전해 처리해서 얻어지는 수용액”ê으로 정의되며, 전해살균수란 상기에 기술한 전해수 중 살균력을 가지는 전해수를 총칭하는 것으로서 강산성전해수, 미산성전해수, 차아염소산나트륨수로 분류할 수 있다. 본 연구에서는 살균효과를 보유한 전해살균수의 제조원리, 장단점 분석과 동향을 분석하고자 하였다.

The electrolyzed water is useful functional aqueous solution generated by electrolyzing city water or light brine water with low DC potential". Electrolyzed sterilizing water is generally called the electrolyzed water which have sterilizing power. It is classified as three types; strongly acidic electrolyzed water, weakly acidic electrolyzed water and sodium hypochlorite water. In this study, preparation principles, advantages, and disadvantages of electrolyzed sterilizing water were analyzed.

I summarized on the understanding and filtration methods to make good water quality, and the utility value of electrolyzed reduced water and acidic water in fish keeping. There are mechanical filtrations including prefiltration and bag filter, biological filtrations including under gravel filter, canister filter, tricle filter (wet/dry filter), chemical filtrations including molecular adsorption resins, ozone, protein skimmer, activated carbon, peat moss and UV sterilizer to get the good water quality in fish keeping. Electrolyzed reduced water and acidic water can be utilized in regulation of pH without chemicals for fish breeding. Also, electrolyzed acidic water can be very useful to prevention of propagation in disease because its effect of sterilization.

Electrolyzed oxidizing water(EOW) has been regarded as a new sanitizer in recent years. Production of EOW needs only water and salt. EOW have the following advatages : disinfection, easy operation system, inexpensive, and environment-friendly. But disadvantage of EOW is its costly electrode. In this study we suggested new electrode which made by different pulse voltammetry(DPV) method. The primary aim of this study is the activation mechanism of oxidation reduction potentials in EOW.

본 연구에서는 탄소 음극과 여러 가지 농도의 리튬염과 VC 또는 ES와 같은 유기물 첨가제를 함유한 수용액 계면에서 진행하는 전기화학 반응을 조사하였다. 전극 반응은 전해질 수용액의 농도와 첨가제의 종류에 크게 의존하였다. 전위주사법과 충방전 시험을 통해 전극반응은 리튬 이온이 전극 내부로 삽입되는 반응이 아니라, 전극 표면에서 석출/용해되는 반응임이 확인되었다.

This study examined the electrochemical reactions occurring between the carbon negative electrodes and aqueous solutions containing different concentrations of lithium salts and organic additives such as, vinylene carbonate (VC) and ethylene sulfite (ES). The electrode reactions were significantly affected by the electrolyte concentration and the kind of additive. Cyclic voltammetry and charge/discharge tests revealed that the electrode reaction was not intercalation/de-intercalation but deposition/dissolution of lithium ions.

기능를 용매로 이용하는 용매상 추출 속도에 대한 연구를 위해 기능수인 전해환원수(ERW)를 사용하는 용출 속도와 정제수(PTW)를 사용하는 용출 속도를 비교하였다. 수용성 용액에 용해도가 우수한 건조 후 분쇄한 녹차를 용질로 사용하였고 자외선-가시광선 분광법를 이용하여 정제수와 전해환원수를 용매로 사용한 녹차 용출 용액의 흡광도를 비교하였다. 저온에서 용출 초기 녹차의 흡광도는 전해환원수와 정제수 모두 비슷한 결과를 보여주었으나 용출 시간이 경과하면서 전해환원수를 용매로 사용한 용액의 흡광도가 증가하였다. 한편 고온에서는 용출 초기부터 전해환원수의 정제수의 흡광도 차이가 크게 나타났으며 용출시간이 경과하여도 흡광도 차이는 변하지 않았다. 용출 온도의 증가에 따라 유사일차반응 속도를 나타내는 것이 명백하게 밝혀졌다.

The purpose of this study is to investigate the extraction rate of solvent extraction in different functional waters, electrolyzed reductive water(ERW) and purified tap water(PTW) were selected as a solvent. Dried and chopped green tea with a good solubility in aqueous solvent was used as a solute. The absorbances of UV-vis spectroscopy obtained green tea extracted solution were used to compare the extraction rate of electrolyzed reductive water(ERW) and purified tap water(PTW). Under low extraction temperature, the absorbances of green tea were similar results in initial periods, then the difference of absorbance between both solution was increased gradually with extraction time increase. On the other hand, the bigger absorbance difference was showed from initial period of extraction and it was maintained after long period in higher extraction temperature. It was revealed clearly that the extraction rate was a pseudo primary reaction rate with increase of reaction temperature.

전해환원수와 증류수를 용매로 사용하여 사문석 분말의 용해반응을 조사하였다. 규산염 광물의 일종인 사문석 성분원소의 용출 특성을 비교함으로서 전해환원수의 활성에 대한 평가를 하였다. 전해환원수와 증류수를 용매로 사용한 용액의 전도도 변화, pH 변화 등을 이용하여 평가하여 전해환원수를 사용한 용액에서 높은 전도도를 확인하였고 pH 변화가 안정한 것을 확인할 수 있었다. 각 용액에 용출된 사문서의 성분을 분석한 결과 전해환원수에서 용해도가 높게 나타나는 것으로 조사되었다. 사문석 성분의 용출반응은 표면에서만 일어나고 결정의 변화와 화학결합의 변화는 일어나지 않은 안정한 상태를 유지하는 것으로 확인되었다.

Electrolyzed reductive water is an alkaline solvent than piped water, natural water etc. but its solvent properties has not been studied in detail. The purpose of this study is to investigate the dissolution property of serpentine in electrolyzed reductive water(ERW) and distillated water(DW) as a solvent. Higher dissolution quantity and rapid dissolution rate were shown in ERW solvent than DW. The crystallographic structure and chemical bondings of serpentine were not changed after dissolution. It could be explained that the dissolution reaction occurred from the serpentine surface in an aqueous solvent and the dissolution property was superior in ERW solvent.

An electrochemical generation of ozonized water was investigated by using β-PbO2 electrode or (Pt-TaOx) electrode as an anode and tap water as an anolyte. According to the potentiometric ozone detection which utilizes potential differences arisen from a chemical reaction of ozone and iodide, increasing tendency of ozone concentration on electrolysis time could be observed to show the maximum value of 8 ppm at an electrolysis time of 10 min. Tendency of the concentration of ozone generated at a (Pt-TaOx) electrode on thee lectrolysis time was obtained by means of the potentiometric analysis and is shown in comparison with that a ta β-PbO2 electrode. Determined by the potentiometric analysis, higher concentration of ozone was generated at a (Pt-TaOx) electrodeth an at a β-PbO2 electrode toshowthemaximumvalueof13.7ppm. Also, it is interesting to see the maximum concentration of generated ozone could be obtained in as short as 3 minutes with a (Pt-TaOx) electrode, which wasquicker than with aβ-PbO2 electrode. Ozone could be generated promptly even at an electrolysis time of 10 sec., suggesting great advantages of this electrochemical process in terms of simplicity and readiness that might be applied directly to practical uses including medical and/or food industries.