• 한국결정성장학회지
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• 제12권2호
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• pp.96-100
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• 2002

본 연구는 광산지역에 있어서 중금속에 의한 광산폐수 오염을 방지하고 그 대책을 마련하고자 한다. 본 연구는 우선적으로 높은 양이온 치환능력을 가진 환경 보전성 재료를 선택하는 데에 있다. 이에 환경보전성 재료로써 고령토, 실리카, 제올라이트, 폐석탄재 등을 선정하였고, 이 재료를 광산폐수에 적용하여 광산폐수의 중금속 수준을 감소시키고 유출수의 수질을 개선하는데 목적이 있다.

• 한국물환경학회지
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• 제26권4호
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• pp.687-690
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• 2010

The objective of this study is to investigate the effect of aldehyde compounds and ploysulfide as accelerating agents on removal of heavy metals and CN in plating wastewater. As a results of the experiments, the removal efficiency of cyanide using the formaldehyde type of aldehydes was the highest at pH 9. Next types were sodium formaldehyde bisulfite addut> paraldehyde> paraformaldehyde. Also, optimum pH and dosage for treating the residual heavy metals by using polysulfide were pH 9 and 30 mg/L, respectively. The removal efficiencies of cyanide, chromium, zinc and copper were above 96.7% at optimum condition.

• 한국농공학회논문집
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• 제55권2호
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• pp.37-45
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• 2013

The aim of this study was to investigate chemical characteristic of livestock compost in association with livestock manure types (poultry, cattle, swine, and mixed manure). The livestock compost was collected from local nonghyup branches on a si-gun level. Chemical composition (nutrients, heavy metals etc.) of the samples was analyzed and Pearson's correlation analysis was performed. Quality of most compost samples met the standard of fertilizer specifications. Poultry compost contains greater nutrients especially $P_2O$ (p-value<0.01) and $NH_4$-N (p-value<0.05). Meanwhile swine compost has higher concentration in water content (p-value<0.05) and heavy metals (p-value<0.01 for Cd, Cu and Zn). Overall, poultry compost was correlated positively with nutrients while swine compost has positive correlation with water content and heavy metals. We expect that the study results can provide base data for determining compost types and amount for crop production.

• 한국지하수토양환경학회:학술대회논문집
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• 한국지하수토양환경학회 2002년도 추계학술발표회
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• pp.291-295
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• 2002

We measured the concentrations of heavy metals and VOCs in groundwaters (N=38) in Seoul. The comparison of our data with U.S. Environmental Protection Agency's Maximum Contaminant Levels for Drinking Water and with the Korean Drinking Water Standards shows that most of the metals except for Fe and Mn do not exceed the levels. However, the concentrations of most heavy metals (esp., Zn, Cu, Cr, Ni) tend to increase in residential and industrialized areas. The examination of the metal speciation using Anodic Stripping Voltammetry (ASV) and TOC analyzer Indicates that large amounts of Zn occur as labile metal fraction, whereas Cu occurs as non- labile forms at many sites, possibly due to its tendency to be adsorbed onto inorganic colloidal particles to form electroinactive species in groundwater. The most frequently existed VOCs in Seoul groundwaters are trichloroethylene and tetrachloroethylene, especially in agricultural, industrial, and high traffic areas.

• Water Engineering Research
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• 제4권4호
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• pp.187-192
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• 2003

The rainfall observation systems have largely been improved in Japan. The Japan Meteorological Agency, prefecture governments, and other administrative bodies have also increased the number of rain gauges thru out the country. The density of observatories is now one per several $\km^2$. Heavy rainfall information systems have been improved. Besides it, the Internet was popularized in the late 1990s, and has been used to transmit data of heavy rainfall. Internet accessible cellular phones have been popular in Japan since 1999. Such phones are expected to be useful in the field of disaster warning announcements, because they can automatically notify users bye-mail of pending disasters. The use of the Internet during natural disasters is groundbreaking in Japan today. However, in order to use disaster information effectively on Internet it is necessary to investigate how to use the information during the rainfall disaster. Therefore in our study we suggest methods on the effective construction and their use of information technology on Internet.

• 청정기술
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• 제18권4호
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• pp.341-346
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• 2012

연구자들은 용수 및 폐수 내에 함유되어 있는 중금속을 효과적으로 제거하기 위한 많은 공정을 연구하고 있다. 많은 공정들 중에서 특히, 물리, 화학적 공정은 생물학적 공정과 비교해볼 때 대체로 간단하고 높은 중금속 제거효율을 얻을 수 있다. 최근에는 방사능원소에 대한 위험성 때문에 물리, 화학적 방법들에 대한 관심이 다시 급격하게 증가하고 있다. 이 연구에서는 화학적 침전, 이온 교환, 전기투석, 그리고 막 분리 등과 같은 다양한 물리, 화학적 공정들을 소개하고자 한다.

• 한국물환경학회지
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• 제22권2호
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• pp.308-313
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• 2006

Charicteristics of piggery waste and treatment processing sludges for reuse were investigated. If it was thoroughly regulated in disinfectants, antibiotic substances and heavy metals, raw piggery waste can be gratified in criteria for fermentative compost (liquid) for flowers cultivation. Also, Because it is satisfied with various criteria of heavy metals and fertilizer contents for reuse except water content, primary pre-treatment sludge is very good material for composting. If provated goods on heavy metals are used in coagulation & dewatering process, coagulation & dewatering sludges are suitable for criteria of special waste regulation and by-product compost. This study proves that, if they are accomplished with suitable composting and mature process, piggery waste and processing sludges are free from microbiological problems as well as criteria of composting.

• 한국지하수토양환경학회:학술대회논문집
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• 한국지하수토양환경학회 2005년도 총회 및 춘계학술발표회
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• pp.24-27
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• 2005

This study has focused on investigation on As and heavy metal contamination derived from metalliferous mining activities in the Choongbuk Province in Korea. Soil, mine effluent, surface water and ground water samples were taken in and around 27 abandoned metal mines, and analyzed for As, Cd, Cu, Ni, Pb and Zn using AAS and anions in water samples using IC. In general, the heavy metal concentrations in soils decreased with Increasing distance from the each mine audit. Tailings and mine waste soils from several mines contained over the guideline of Soil Conservation Act in Korea. Soil samples from the Seobo, Honga, Daehwa, Jeungjadong, Youngbo and Munbaek mines contained over the action levels of the metals due to intensive mining activities. Therefore, a proper remediation work needs to control the metal dispersion around the mines.

• 한국환경보건학회지
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• 제18권1호
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• pp.69-75
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• 1992

Authors investigated the heavy metals in water, soil, rice and Urine of residents along the KUM river. Sample were analyzed by Varian Atomic absorption Spectrophotometer. The results obtained were as follows. 1. The Contents of cadmium and Lead in water were in the range of 0~2.15$\mu$g/l, 0~4.29$\mu$g/l, respectively. 2. The Contents of heavy metals in soil were in the range of 0.32~0.91mg/kg, 5.59~21.55mg/kg for Cd, Pb respectively. 3. Those in rice were in the range of 0.025~0.062mg/kg for Cd, Pb respectively. 4. The mean of Lead and Cadmium Concentration in Urine of residents of Munju Ri were 28.63$\mu$g/l and 1.66$\mu$g/l respectively, Those was also the highest level among the investigated group.

• Journal of Industrial and Engineering Chemistry
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• 제68권
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• pp.301-310
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• 2018

Various catalysts such as formic acid, acetic acid, sodium hydroxide, sodium bicarbonate, carbon dioxide and nitrogen gas were used for hydrolyzates production from deoiled mackerel muscle by subcritical water hydrolysis. Above 99% hydrolysis yield was obtained using sodium bicarbonate catalyst at $260^{\circ}C/70bar$. Histamine and heavy metals concentration were reduced in hydrolyzates. Highest amount of amino acid (400.36 mg/g) and reducing sugar (24.75 mg/g) were found in hydrolyzate obtained at $260^{\circ}C/70bar$ and $220^{\circ}C/30bar$, respectively with sodium bicarbonate catalyst. Antioxidant and ACE-inhibitory activities were significantly higher in hydrolyzates obtained using sodium bicarbonate than that of others.