치과기공소 주조체 산세척과정에서 발생하는 폐수내 중금속 농도

• 영문명: A Study on Heavy Metal ConcentrationsinWaste Water Produced in the Casting Pickling Process at Dental Technical Laboratories
• 발행기관: 한국환경보건학회
• 저자명: 정다이(Da-i Jeong) 사공준(Joon Sakong)
• 간행물 정보: 『한국환경보건학회지』제44권 제1호, 55~62쪽, 전체 8쪽
• 주제분류: 공학 > 환경공학
• 파일형태: PDF
• 발행일자: 2018.02.28

영문 초록

Objectives: This study set out to measure the heavy metal concentrations in waste water produced in the casting pickling process at dental technical laboratories and examine the actual state of its treatment. Methods:The investigator measured the concentrations of each heavy metal at 55 dental technical laboratories usinganinductively coupled plasma optical emission system. Results: The annual usage of electrolytes was under 10 L in 50 (90.9%), and was 10L or more in five (9.1%) laboratories. Amongthe laboratories, 15 (27.3%) commissioned the treatment of waste,12 (21.8%) treated the waste with general sewage,and 28 (50.9%) treated the waste in aseptic tank. The arithmetic mean ± standard deviation and the geometric mean of chrome(Cr) were 75.3±50.9 and 58.3 mg/L; those of cobalt (Co) were 112.3±106.7 and 66.1 mg/L; those of nickel (Ni) were 62.9±83.5 and 8.9 mg/L; those of molybdenum (Mo) were 17.1±13.4 and 12.0 mg/L; those of iron (Fe) were 31.5±44.1 and 6.2 mg/L; those of lead (Pb) were 0.3±0.3 and 0.3 mg/L; those of beryllium (Be) were 3.6±3.6 and 2.0 mg/L. The hydrogen ion concentration was under pH 2 across all the samples. Conclusions: The findings show that the dental technical laboratories were not doing well with the separation, storage, collection, and treatment of the electrolytes they discarded, and that most of the electrolytes were introduced through the general sewage or aseptic tank. The causes of this include alack of perception among the practitioners atdental technical laboratories and contracted companies avoiding collection foreconomic reasons. There is a need for education to improve the perceptions of waste water treatment among the practitioners atdental technical laboratories. Environment-related departments should be stricter with legal applications in the central and local governments. It is also requiredto provide proper management of commissioned treatment.

목차

I. 서 론

II. 재료 및 방법

III. 연구결과

IV. 고 찰

V. 결 론

키워드

Dental waste environment public health disposal