해수용 기준전극 개발을 위한 겔 타입 내부전해질 제조 및 잔류염소 측정장치에의 적용

김유진; 이해돈; 김대원; Yu-Jin Kim; Hae-Don Lee; Dae-Won Kim

Applied Chemistry for Engineering, Vol.28, No.2, 153-157, April, 2017

DOI10.14478/ace.2016.1086 Export Citation

해수용 기준전극 개발을 위한 겔 타입 내부전해질 제조 및 잔류염소 측정장치에의 적용

Fabrication of Gel-type Electrolyte for the Development of Reference Electrode for Sea Water and Application to Measuring Equipment for Total Residual Oxidants

김유진, 이해돈, 김대원^†

(주)테크로스 중앙연구소

Yu-Jin Kim, Hae-Don Lee, and Dae-Won Kim^†

Central research center, Techcross, 433 Noksansaneopbuk-ro, Gangseo-gu, Busan 46758, Korea

E-mail:

초록

Hydroxyethyl-cellulose (HEC) 함량별로 겔 타입 내부전해질을 제작하여 이온전도도와 내구성 측정 실험을 수행하였다. 이온전도도 측정결과 HEC 함량이 증가할수록 이온전도도가 감소하여 12% 함량의 겔 타입 내부전해질은 기준전극에 적용이 어려울 것으로 판단하였다. HEC 함량별 내구성 실험결과, HEC의 함량이 감소할수록 carrier density가 증가하여 다공성 막을 통해 유출되는 전해질(KCl)의 양이 증가하였다. 따라서 선박평형수 처리장치와 같이 장시간 사용하기 위해 겔 타입 내부전해질을 HEC 10%로 선정하였다. HEC 10%의 겔 타입 내부전해질을 이용하여 기준전극과 TRO (total residual oxidants) 센서를 제작하여 TRO 분리능 실험을 수행하였다. TRO 센서에 50 mV의 전위를 30 s 동안 동일하게 인가하여 전류변화를 비교한 결과 0.2~30 PSU 조건에서 0~15 mg/L의 TRO 농도가 분리됨을 확인하였다. 따라서 HEC를 이용한 겔 타입 내부전해질을 TRO 센서에 적용할 수 있으며, 이를 이용하여 담수뿐만 아니라 해수 조건에서 TRO를 측정할 수 있음을 확인하였다.

Gel type internal electrolytes were synthesized by varying hydroxyethyl-cellulose (HEC) amounts and their durability and conductivity were measured. The ionic conductivity decreased as the content of HEC increased thus the internal electrolyte containing more than 12% of HEC could not be used as a reference electrode. Based on durability test results, as the HEC amount decreased carrier density resulting in increasing of the amount of KCl coming out of the porous membrane. Therefore in order to use long time at ballast water treatment systems, we selected 10% HEC for gel type internal electrolyte. The resolution test for total residual oxidants (TRO) was carried out using the TRO sensor and the gel type reference electrode made of 10% HEC. A 50 mV potential was applied to the TRO sensor for 30 sec and changes in the current were measured. It was confirmed that the TRO concentrations ranging from 0 to 15 mg/L could be separated at salinity conditions of 0.2~30 PSU. The results indicated that the TRO concentration at sea water and at fresh water was successfully measured by the TRO sensor constructed with the reference electrode using gel-type internal electrolyte of HEC.

Keywords:gel polymer electrolyte;reference electrode;electrochemical sensor;total residual oxidants;ballast water management system

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[2] Scriven DR, Dibacco C, Locke A, Therriault TW, Mar. Policy, 59, 121 (2015)

[3] Maglic L, Zec D, Francic V, Mar. Pollut. Bull., 103, 93 (2016)

[4] Culin J, Mustac B, Ocean Coast Manag., 105, 100 (2015)

[5] Werschkun B, Banerji S, Basurko OC, David M, Fuhr F, Gollasch S, Grummt T, Harrich M, Jha AN, Kacan S, Kehrer A, Linders J, Mesbahi E, Pughiuc D, Richardson SD, Schulz BS, Shah A, Theoblad N, Gunten UV, Wieck S, Hofer T, Chemosphere, 112, 256 (2014)

[6] Zhang N, Wang Y, Xue J, Yuan L, Wang Q, Liu L, Wu H, Hu K, Regul. Toxicol. Pharmacol., 77, 192 (2016)

[7] Delacroix S, Vogelsang C, Tobiesen A, Liltved H, Mar. Pollut. Bull., 73, 24 (2013)

[8] Park KW, Kim ST, Lee HD, Park YS, Kim DW, Lee KS, Ku JH, Kim YJ, Ballast water treatment system, US Patent 14/779,153 (2014).

[9] Zimmer-Faust AG, Ambrose RF, Tamburri MN, Water Sci. Technol., 70, 1585 (2014)

[10] Jovic M, Cortes-Salazar F, Lesch A, Amstutz V, Bi HY, Girault HH, J. Electroanal. Chem., 756, 171 (2015)

[11] Saad B, Wai WT, Jab MS, Ngah WSW, Saleh MI, Salter JM, Anal. Chim. Acta, 537, 197 (2005)

[12] Moberg L, Karlberg B, Anal. Chim. Acta, 407, 127 (2000)

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[14] Kodera F, Umeda M, Yamada A, Anal. Chim. Acta, 537, 293 (2005)

[15] Lee DK, Kang TY, Woo HJ, Kim SW, Kim JK, Residual chlorine sensor on electrochemistry and measurement equipment use thereof, Korean Patent 10-2002-0043267 (2002).

[16] Hwang H, Methods of Electrochemical Analysis, 1-17, Free Academy, Gyeonggi-do, Korea (2011).

[17] Del Campo FJ, Ordeig O, Munoz FJ, Anal. Chim. Acta, 554, 98 (2005)

[18] Murata M, Ivandini TA, Shibata M, Nomura S, Fujishima A, Einaga Y, J. Electroanal. Chem., 612(1), 29 (2008)

[19] Vonau W, Oelβner W, Guth U, Henze J, Sens. Actuators B-Chem., 144, 368 (2010)

[20] Inzelt G, Lewenstam A, Scholz F, Handbook of Reference Electrode, 92-96, Springer, NY, USA (2013).

[21] An BJ, Lee JT, Lee CE, Novel Cosmetic Materials, 230-231, Kwang Moon Gak, Gyeonggi-do, Korea (2009).

[22] Oh SJ, Shim HJ, Kim DW, Lee MH, Lee CJ, Kang YK, J. Korean Electrochem. Soc., 13, 145 (2010)