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폐목재 기반 유사-그래핀 제조 및 이를 이용한 수중 염료 제거
도지영(Ji-Young Do),김동수(Dong-Su Kim),Hiresh Moradi,최예진(Ye-Jin Choi),양재규(Jae-Kyu Yang) 유기성자원학회 2022 유기성자원학회 학술발표대회논문집 Vol.2022 No.추계
바이오매스의 화학적 처리와 열분해 공정을 통해 탄소기반 물질인 Graphene-like carbon(GLC) 을 제조하기 위하여 폐목재를 바이오매스로 사용하였고 FeCl3와 ZnCl2를 화학적 처리와 개질을 위한물질로 사용하였다. 폐목재 바이오매스의 고온 열분해시 FeCl3는 유사-그래핀 생성을 위한 템플릿(Templet) 역할을 하며, ZnCl2와 바이오매스와의 산화-환원 반응에 의해 생성된 여러 가스상의 물질과 환원된 Zn의 기화에 의한 다공성 및 높은 비표면적 형성을 통해 유사-그래핀이 생성되었다. 제조한 유사-그래핀의 특성 분석은 FT-IR, Raman, XPS를 사용하여 실시하였다. 열분해온도와 두 금속염의 주입비를 달리한 여러 조건에서의 제조실험 후 선정된 최적 유사-그래핀을 사용하여 양이온성 색도물질인 Rhodamine-B와 음이온성 색도물질인 Congo Red의 제거실험을 반응용액의 pH, 반응온도, 흡착질/흡착제 비 변화에 따른 여러 회분식 실험을 통하여 실시하였다. 실험결과, 본 연구에서 제조한유사-그래핀의 두 염료물질 제거능은 기존 상업용 활성탄에 비해 Rhodamine-B는 약 17.3배, Congo Red는 약 4.6배 이상을 보였으며 흡착기작은 화학적 흡착보다는 물리적 흡착에 의한 것임을 알 수있었다. 현재 폐목재 재할용에 대한 필요성이 증가하고 있는 실정에서 이를 고 부가치가 있는 유사- 그래핀으로 제조하고 수처리용 흡착제로 활용하는 것은 적절하면서 가능성이 높음을 알 수 있었다.
간호대학생 대상의 SBAR를 활용한 인수인계 교육 프로그램이 자기효능감, 의사소통능력과 임상수행능력에 미치는 효과
도지영(Do, Jiyoung),신수진(Shin, Sujin) 기본간호학회 2019 기본간호학회지 Vol.26 No.2
Purpose: This study was conducted to develop a handoff education program for nursing students and examine the effects of it on nursing students’ self-efficacy, communication ability, and clinical performance ability. Methods: A quasi-experimental design was used with a nonequivalent control group pretest-posttest method. The experimental group (n=31) received handoff education using SBAR; the control group (n=31) received non-SBAR handoff education. Self-efficacy, communication ability, clinical performance ability were measured to evaluate the effects of the program. Results: The experimental group showed significant improvements in self-efficacy (p<.001), and communication ability (p=.025) compared to the control group. However, there was no significant difference in the clinical performance ability between the groups (p=.618). Conclusion: The results indicate that the handoff education program using SBAR is effective in improving nursing students’ self-efficacy and communication ability.
도지영(Do, Jiyoung),신수진(Shin Sujin),이인영(Lee, Inyoung),정영선(Jung, Youngsun),홍은민(Hong, Eunmin),이미선(Lee, Mee Sun) 질적연구학회 2021 질적연구 Vol.22 No.2
Purpose: The purpose of this study was to identify attributes of clinical nurses" critical reflection. Methods: Focus group interviews were conducted from April 20th to July 30th, 2021. Ten participants of a critical reflection program who had experience of teaching new nurses with more than 5 years of clinical experience in a tertiary general hospital were enrolled in this study. Data were analyzed with the inductive content analysis method of Elo and Kyngäs (2008). Results: The following four themes were derived: “Identifying the contextual meaning of nursing situation”, “Applying what has been learned to practice by reconstructing experiences”, “Discovering the meaning of nursing while learning from experience”, and “Reinforcing of inner resources through an open exchange of ideas”. These results showed attributes of clinical nurses with good critical reflection. Conclusion: A critical reflection program based on reflective experience is needed to continuously improve nursing competency of clinical nurses.
오정은 ( Jungeun Oh ),도지영 ( Jiyoung Do ),장민진 ( Minjin Jang ),허정미 ( Jungmi Heo ) 이화간호과학연구소 2019 Health & Nursing Vol.31 No.2
Purpose: The purpose of this study is to provide an in-depth understanding of the clinical experience of new nurses through integrated review and synthesis. Methods: This study was performed according to the qualitative meta-synthesis method proposed by Atkins et al. The final six articles were meta-synthesized to comprehensively describe the clinical experience of the new nurse. Results: There were 44 themes derived from the collected literature, which were integrated into 8 themes. The clinical experience integrated among new nurses is as follows. New nurses struggling from immaturity in new clinical environment, physical hardship caused by working conditions at the clinical practice, feeling burdened by the increasing workload in an unfamiliar work environment and excessive role, lacking professional knowledge and skill about clinical practice. In addition, parents, caregivers, colleagues, and senior nurses make it difficult or supportive to adapt clinical practice for new nurses. However, new nurses put effort in obtaining knowledge to become a qualified nurse, and discover themselves who are adjusting to clinical practice. Conclusion: These results provide an in-depth understanding of the clinical experience of new nurses, which can be used as basic data in the development and application of educational programs to help new nurses adapt to their clinical settings.
한국판 Perceived self-efficacy of handoff reporting (PSH-K) 도구의 타당화
황은희 ( Hwang Eunhee ),도지영 ( Do Jiyoung ),신수진 ( Shin Sujin ) 이화간호과학연구소 2017 Health & Nursing Vol.29 No.2
Purpose: The purposes of this study were to develop and test the validity and reliability of the Korean version of perceived self-efficacy of hand-off reporting (PSH-K). Methods: The PSH-K was developed through translation and back translation of PSH English version. In order to test a content validity, four head nurses and five nursing professors reviewed the content validity of this instrument and then to validate a criterion validity and reliability, data were collected from 210 nursing students. Pearson correlation, ANOVA, and Cronbach’s alpha were used to analyze the data. Results: As a result, the content validity and criterion validity of the PSH-K were verified and the internal reliability was .805. Conclusion: The findings of this study demonstrated that the Korean version of perceived self-efficacy of hand-off reporting had satisfactory validity to measure the self-efficacy of hand-off of the nursing students in Korea.
화학적 개질방법을 적용하여 폐목재로부터 제조한 바이오차를 이용한 중금속 제거
김동수 ( Dong-su Kim ),최종수 ( Jong-soo Choi ),김세희 ( Se-hee Kim ),도지영 ( Ji-young Do ),박삼배 ( Sam-bae Park ),최유림 ( Yu-lim Choi ),장윤영 ( Yoon-young Chang ),양재규 ( Jae-kyu Yang ) 한국수처리학회 2020 한국수처리학회지 Vol.28 No.6
Wastewater containing various harmful heavy metals is commonly generated from small businesses in the Seoul metropolitan area, and it may cause serious pollution to the soil, surface water and underground water due to improper treatment. In order to treat wastewater containing heavy metal ions, adsorption technique using carbon-based material is generally applied. Among several carbon-based material, biochar has much attention because it is known to have a large surface area and high cation exchange capacity. In this study, bio-char powder was manufactured by pyrolysis of waste wood in the range of 400 to 900°C and/or was modified using several acidic solutions such as chloroacetic acid, nitric acid and phosphoric acid to improve adsorption of heavy metals. In order to save energy, pyrolysis was performed with three methods, namely, microwave, low temperature Dry Oven and tube furnace. In the case of biochar obtained by pyrolysis with microwave, removal capability for Pb(II) and Cd(II) was 91.7 mg/g and 75.1 mg/g, respectively. In addition, when low temperature pyrolysis was performed using dry oven after phosphoric acid refinement, the removal capacity for Pb(II) and Cd(II) was 70.1mg/g and 60.8 mg/g, respectively. Finally, in the case of pyrolysis using tube furnace, removal capability for Pb(II) and Cd(II) was 89.7 mg/g and 67.7 mg/g, respectively. The biochar obtained from phosphoric acid-low temperature pyrolysis in dry oven is considered to be the most practical modified method considering possibility of mass production and saving of energy input, although it has less relative removal of heavy metal ions than tube-furnace and microwave oven (700 W). The results of this study show that the chemical modification of biomass using phosphoric acid and low-temperature pyrolysis can be potentially applied in the treatment wastewater contaminated with heavy metal ion in the future
인산 개질 바이오차와 레드머드를 이용한 비소 및 중금속 복합 오염토양 안정화
최유림 ( Yu-lim Choi ),김동수 ( Dong-su Kim ),김세희 ( Se-hee Kim ),강태준 ( Tae-jun Kang ),도지영 ( Ji-young Do ),박광진 ( Gwang-jin Park ),양재규 ( Jae-kyu Yang ),장윤영 ( Yoon-young Chang ) 한국폐기물자원순환학회(구 한국폐기물학회) 2021 한국폐기물자원순환학회 춘계학술발표논문집 Vol.2021 No.-
토양안정화기술은 토양 중 오염물질을 제거하여 함유량을 감소시키는 기존 공법과는 달리 안정화제를 오염 토양에 주입함으로써 오염물질을 안정화된 형태로 변환시켜 이동성 및 생물유효도를 저감시키는 기술이다. 토양안정화기술은 준금속 및 중금속 오염 토양에 적용이 가능하며 빠르고 간편하게 적용할 수 있으며 토양의 특성, 생태적 기능 및 부지의 용도를 유지할 수 있는 위해도 기반의 토양 오염복원기술로 알려져 있다. 레드머드는 보크사이트(bauxite) 제조 과정에서 발생하는 부산물로서 수 마이크로미터의 입자크기에 형태에 다량의 Fe<sub>2</sub>O<sub>3</sub>와 Al<sub>2</sub>O<sub>3</sub> 성분을 보유하며 강알칼리성을 가지고 있는 물질이다. 강알칼리성의 특성으로 인해 산성 오염 토양 등에 적용될 수 있으나 적용 비율이 높아지는 경우에는 토양의 pH가 작물이 밭토양의 적정 pH 보다 더 높아질 수 있다. 한편 바이오차(biochar)는 고온과 산소가 제한된 조건에서 바이오매스(biomass)를 통해 얻어지는 물질로서 높은 pH, 비표면적, 산소함유관능기를 보유하고 있어 수처리 또는 토양안정화 분야에서 널리 이용되고 있는 물질이다. 최근에는 비표면적을 넓히고 표면의 특성을 개질하거나 탄화의 필요한 온도를 낮출 수 있는 화학적 활성화 방법을 이용한 바이오차 제조가 여러 연구자들에 의해 진행되고 있다. 본 연구에서는 비소와 중금속으로 오염된 복합오염토양의 안정화를 위해 인산으로 개질된 바이오차와 레드머드를 적용하였다. 인산으로 개질된 바이오차와 레드머드의 안정화 효과를 확인하기 위해 적용 2주 후의 토양의 이화학적 특성 변화를 분석하고 비소 및 중금속 용출 시험을 실시하였다.