영산호의 부영양화 평가를 위한 인부하모델의 검토

류일광,이치영 한국환경보건학회 2000 한국환경보건학회지 Vol.26 No.4

The purpose of this is made an examination of phosphorus loading model for eutrophication response in the Yongsan lake. For the model, we measured the total amount of nutrients derived from the Yongsan river watershed, inflow rate to the Yongsan lake, water quality, and water budget from January to December in 1999. The total amount of precipitation in the Yongsan river watershed was 4,951.7$\times$10$^{6}$ ㎥/y and inflow amount was 2,569.7$\times$10$^{6}$ ㎥/y, therefore the outflow rate of the Yongsan river watershed was 51.9%. The develop loading of total nitrogen was 86,928.1kg/d and that of total phosphorus was 22,007.6kg/d at the Yongsan river watershed, But, as the inflow loading of total nitrogen was 33,962kg/d and the inflow loading of total phosphorus was 2,218kg/d to the Yongsan lake. so each infolw rate was 39.0% and 10.1%. The hydraulic residence time was 34days, total phosphorus loading [L(P)] on the surface area was 23.398g/㎥/y, the hydraulic load( $Q_{s}$) of inflow water was 74.269m/y, the reserve rate of phosphorus in the lake was 0.359, and the settinh velocity of phosphorus was 0.114m/d at the Yongsan lake. Mathematical model of phosphorus loading to estimate the responses of eutrophication at the Yongsan lake is [ $P_{j}$] = 0.838 [L(P)/Q.(1+√ $T_{w}$)$^{-1}$ ] . ] . .

광주천 본천상의 N-hexane 추출물에 관한 조사 연구

류일광,이치영,강영식,노기환 광주보건대학 1984 論文集 Vol.9 No.-

Waste-water pollution of Kwangju river was examined for six months from May, 1983 to Oct, 1983. For checking the waste-water pollution, 5 sampling positions were selected from main river. The obtained results were as followings. 1) The concentration of N-hexane extraction matter in Kwangju river were increased gradually from 31.9ppm in July. 2) The average concentration of N-hexane extraction matter in mid-stream (sampling position in Kwangju bridge, Yangdong bridge and Kwangcheon bridge) was 12.4∼17.7ppm and in down stream(sampling position in Yuduck dong) was 23.6ppm. 3) In the relationship between N-hexane extraction matter and COD a strong and significant correlation coefficient(r=0.65) was calculated and the frequency distribute very closely along- the straight line equation, y=23.39x- 325.44. 4) From above facts the author found out that as the N-hexane extraction matter concentration in general river water coexist closely with other pollutant it is likely to be considered as new water pollution index.

鍍金폐수처리 汚泥의 중금속 溶出에 관한 연구

류일광,추현식 광주보건대학 1998 論文集 Vol.23 No.-

At present industrial wastes in Korea are disposed of according to The Waste Management Law. The sludge produced through wastewater treatment process is tested by the stipulated method to detect any toxic substances, and if the sludge analyzed contains of toxic substances that exceed, certain levels, it must be disposed of by a mandated method. In this paper I have tested the method of extraction for several heavy metals within the sludge produced through the wastewater treatment of the metal-plating. The results of the research are as follows : 1. There were more heavy metals in the extraction test, which used leachate from the landfill, than in the test conducted by the stipulatedcmethod. 2. Generally, the sludges contained heavy metals are to be landfilled through the isolation and reclamation method or through cementation, but, when cementaion is used, the cement/sludge ratio must be more than 1.0. 3. The stipulated method of The Waste Managemant Law has to be modified to a more stringent level to limit the release of toxic heavy metals.

無電解鍍金에 의한 Ni-T1-P 合金皮膜의 耐蝕特性

류일광,정종현 광주보건대학 2002 論文集 Vol.27 No.-

The crystalline structure and corrosion resistance properties were investigated on the nickel-thallium-phosphorus alloy deposits by electroless-plating. The electroless nickel-thallium-phosphorus alloy deposits were achieved with a bath using sodium hypophosphit as the reducing agent and sodium citrate as the complexing agent. The basic plating solution is composed of 0.1M NiSO₄, 0.005∼0.01M T1₂SO₄, 0.2M sodium hypophosphite, and 0.05M sodium citrate and the plating condition were pH 5.5, temperature 90℃. The results obtained are summarized as follows: 1) Sodium citrate as a complexing agent was most suitable in view of plating rate, the stability of plating bath, and surface condition. To increase T1 % of alloy deposits, it is necessary to increase either the concentration of sodium citrate of the plating solution within the range of 0.02 to 0.01M or the ion concentration of T1 within the range of [T1^(+)]/[Ni^(2+)]= 0.1. 2) The deposition rate and P content of deposits increased as the concentration of reducing agent, sodiun hypophosphite was increasing, but over 0.3M T1 deposition didn't occur, and P content tended to adversely decrease as the amount of T1 increased. 3) The crystal structure of deposit was amorphous structure as deposited state, became microcrystallized centering on Ni(111) plane by heat treatment at 200℃, and grew as polycrystalline Ni, Ni₃P, Ni_(5)P₂, T1, etc. by heat treatment higher than 350℃. The grain size of plated deposits was grown up to 28.3∼42.0㎚ by heat treatment for 1 hour at 500℃. 4) The corrosion resistance of plated deposit decreased as T1 content was increased. And The corrosion resistance of 5-6% T1 alloyed deposit was better than that of Ni- P deposit. For the corrosion test with 1N-H₂SO₄ sol. the corrosion resistance was good in case of the immersion within 48hrs. while sudden corrosion proceeded over that time.

光州市 環境汚染에 關한 調査硏究(Ⅲ) : 大氣汚染 및 騷音에 關하여 A Study on Air Pollution and Noise Level

류일광,이치영,강영식 광주보건대학 1978 論文集 Vol.4 No.-

Air pollution in Gwangju area was examined for 12 months from Jan, 1978 to Dee, 1978. The surveyed area was divided into four; Industrial, Commercial, Residential and Park area. Ten surveying sites which were 'representing the characteristics of each area were selected. The measuring methods were; the Lead dioxide cylinder method for Sulfur oxides, Triethanolamine plate method for Nitrogen oxid Deposit Gaug method for Dustfall, and the RION noise meter for Noise Level. The results we obtained are as follows. 1. Sulfuroxides The mean of Sulfur oxides was 2.519㎎SO₃/day/10.0㎠PbO₂, ranging from 1.78 to 3.11 ㎎SO₃day/100㎠PbO₂. The mean value of Sulfur oxides was 2.903㎎SO₃/day/100㎠ PbO₂ for Residential area, 3. 108㎎SO₃/day/100㎠PbO₂ for Commercial area 1.775㎎SO₃/day/100㎠PbO₂ for Industrial area, and 2.251㎎S0₃/day/100㎠PbO₂ for Park area, respectively. 2. Nitrogen Dioxides The mean value of Nitrogen dioxides was 31.529㎍NO₂/day/100㎠, ranging from 23.692 to 46.255㎍NO₂/day/100㎠. At Commercial area whene the value was the highest, the rance of Nitrogen oxides level was 14.45-62.458 ㎍NO₂/day/100㎠. 3. Dustfall The mean value of Dustfall was 42.53 ton/㎢/month, ranging from 24.36 to 55.93 ton/㎢/month. The Dustfall for Residential area was higher than any other area. 4. Noise The mean value of noise level was 62 dB(A), ranging from 43 to 79 dB(A). The Noise of 70.3 dB(A), at Commercial area was higher than any other area.

光州市 환경오염에 관한 조사연구(Ⅴ) : 대기 및 소음에 관하여 A Study on Air Pollution and Noise Level

류일광,이치영,강영식 광주보건대학 1981 論文集 Vol.6 No.-

Air Pollution in Qwangju area was examined for 12 months from Jan, 1980 to Dee, 1980. The surveyed area was divided into four; Industrial, Commercial, Residential and Park area. Nine surveying sites which were representing the characteristics of each area were selected. The measuring methods were: the Lead dioxide cylinder method for Sulfur oxides, Triethanolamine plate method for Nitrogen dioxid, Deposit Ga㎍e method for Dustfalls and the RION noise meter for Noise Level. The results we obtained are as follows. 1. Sulfur oxides The mean of Sulfur oxides was 3.54 ㎎SO₃day/100㎠PbO₂ ranging from 2.26 to 4.87 ㎎SO₃/day/100㎠PbO₂. The mean value of Sulfue of Sulfur oxides was 3.498 ㎎SO₃a/day/100㎠PbO₂ for Residential area, 4.119 ㎎SO₃/day/100㎠PbO₂ for Commercial area, 3.86 ㎎SO₃/day/100㎠PbO₂ for Industrial area and 2.614 ㎎SO₃/day/100㎠PbO₂for Park area, respectively. 2. Nitrogen dioxides The mean value of Nitrogen dioxides was 43.51 ㎍NO₂/day/100㎠, ranging from 29.96 to 94.96 ㎍NO₂/day/100㎠. At Commercial area whene the value was the highest, the range of Nitrogen dioxides level was 2.39-125.82 ㎍NO₂/day/100㎠. 3. Dustfalls The mean value of Dustfalls was 39.937 Ton/㎢/month, ranging from 11.28∼147.71 Ton/㎢/month. The Dustfalls for Residential area was higher than any other area. 4. Noise The mean value of Noise Level was 64.25 dB(A), ranging from 42 to 75 dB(A). The Noise of 72 dB(A), At Commercial area was higher than any other area.

광주시 환경오염에 관한 조사연구(Ⅵ) : 대기오염 및 소음에 관하여 A Study on Air pollution and Noise level

류일광,이치영,강영식 광주보건대학 1982 論文集 Vol.7 No.-

Air pollution, in Gwang-ju area was examined for 12 months from Jan, 1981 to Dec, 1981. The surveyed area was divided into four; Industrial, Commercial, Residential and Park area. Nine surveying sites which were representing the characteristics of each area were selected. The measuring methods were; the Lead dioxide cylinder method for Sulfur oxides, Triethanolamine plate method for Nitrogen dioxid. Deposit Gauge method for Dustfalls and the RION noise meter for Noise level. The results we obtained are as follows. 1. Sulfur oxides The mean of Sulfur oxides was 3.66㎎SO₃/day/100㎠PbO₂ ranging from 0.11 to 19.70㎎SO₃/day/100cmrPbO2. The mean value of Sulfur oxides was 3.79㎎SO₃/day/100㎠PbO₂ for Residential area, 4.29㎎SO₃/day/100㎠PbO₂ for Commercial area, 4.07㎎SO₃/day/IOtWPbO^ for Industrial area and 2.428㎎SO₃/100㎠PbO₂ for Park area, respectively. 2. Nitrogen dioxides The mean value of Nitrogen dioxides was 46.563㎍NO₂/day/㎠, ranging from 8.42 to 135.26㎍NO₂/day/100㎠. At Commercial area when the value was the highest, the range of Nitrogen dioxides level was 8.42~135.26㎍NO₂/day/100㎠ 3. Dustfalls The mean value of Dustfalls was 40.59ton/㎢/month, ranging from 3.27∼254.14 ton/㎢/month. The Dustfalls for Residential area was higher than any other area. 4. Noise The mean value of Noise level was 64.64dB(A), ranging from 41 to 80dB(A). The Noise of 72.25dB(A), at Commercial area was higher then any other area.

潭陽湖의 水質變化에 관한 조사 연구

류일광,이치영,강영식 광주보건대학 1986 論文集 Vol.11 No.-

Water quality of Damyang Lake was exa-mined for 3 months from October 20, 1985 to December 21, 1985- For checking the water quality 3 sampling positions were selected. The results we obtained are as follows. 1. The average for Damyang Lake was 7.0∼7.9 of pH, 7.8∼7.9 ppm of Biochemical Oxygen Demend (BOD), 0.028∼0.045ppm of Total Phosphate, 0.396∼0.746 ppm of Total Nitrogen. 2. The monthly average for Damyang Lake was 7.0∼7.1 of pH, 0.5∼0.6 ppm of BOD, 0. 028∼0.037 ppm of T-P, 0.39∼0.65 ppm of T-N, in October, 7.8∼7.9 of pH, 1.5∼2. I Ppm of BOD, 0.042∼0. 049 ppm of T-P, 0. 69∼0.82 ppm of T-N, in November. 7.8∼7.9 of pH, 2.5∼2.8 ppm of BOD, 0.026∼0.031 ppm of T-P, 0.29∼0.54 Ppm of T-N, in Decomber. 3. The sampling positions average for Damyang Lake was 7. 1∼7.9 of pH, 0.5∼2.8 ppm of BOD, 0.029∼0.049ppm of T-P, 0.36 ∼0.69 ppm of T-N, in I position. 7.1∼7.9 of pH, 0.5∼2.5 ppm of BOD, 0.031∼0.042 ppm of P-P, 0.54∼0.65 Ppm of T-N, in 2 position. 7.0∼7.8 of pH, 0.6∼2.6 ppm of BOD, 0.026∼0.046ppm of T-P, 0.29∼0.73 ppm of T-N, in 3 position.

광주천의 환경오염에 관한 조사연구 : 수질오염에 관하여 A Study on water pollution on Gwangju river

류일광,이치영,강영식 광주보건대학 1983 論文集 Vol.8 No.-

Water pollution of Gwangju river was examined for five months from June 30, 1982 to October 30, 1982. For checking the water pollution, 11 sampling positions were selected; 5 from main river and 6 from branch streams. We assumed that the water pollution of Gwangju river was dus to the organic materials, which cams from the domestic sewage. The apparatus test were; pH meter (orion 301), temperatur, DO meter (Delta 1010), spectrophotometer (Hitach 181). The results we obtained are as follows. 1. The average range for mid-stream (sampling position 3,5 and 6 of Gwangju river) was 3.38-4.01 ppm of Dissolved oxygen(DO), 66.0-87.5 ppm of Biochemical oxygen demand(BOD), 57.64-71.18 ppm of chemical oxygen demand(COD), 55.11 -69.81 ppm of suspended solid(SS), 2.96-3.72 ppm of NH₄N and 71.44-108.48 ppm of Cl^(-) 2. The average range for upper-stream (sampling position 2 of Gwangju river) was 4.00 ppm of DO, 61.64 ppm of BOD, 58.08 Ppm of COD, 50.11 ppm of SS, 2.91 ppm of NH₄-N and 24.42 ppm of CL^(-). 3. The average range for down-stream (sampling position 10 of Gwangju river) was 2.45 ppm of DO, 100.32 ppm of BOD, 84.44 ppm of COD, 90.65 ppm of SS, 2.01 ppm of NH₄-N and 83.82 Ppm of CL^(-).

여천 공업단지 공장폐수에 관한 조사연구

류일광,이치영,강영식 광주보건대학 1981 論文集 Vol.6 No.-

Water pollution of Yeocheon Industrial Complex was examined from 2. September 1980 to 5. September 1980. For checking the water pollution, 5 sampling positions were selected; we assumed that the water pollution of Yeoch-eon Industrial Complex was due to the oil and metals, which came from industrial materials and oil. The apparatus for this test were ; pH meter (Fisher accumet 520), Temperature meter (Delta 1010), spectrophotometer (Hitach 181, spectronics 20 L&B 2), Atomic absorption spectoroph.otometer (Hitach 170∼30, Myrano 1). The results we obtained are as follows. 1. The average range was 6.99∼9.67 of pH, 12.9∼43.85ppm of COD, 9.675∼30.8ppm of BOD, 28.0∼125.25ppm of SS, 388.25∼607.5ppm of VS, 0.6183∼2.4442ppm of phenol, 29.6∼76.375ppmof oil, 4.559∼15.121ppm of T-P,0.55∼0.975ppm of CN,0.040∼0.143ppm of T-Hg, 24.77∼224.075㎍/l of T-Cr, 2,6865∼8.9365ppm of Cu, 0.2018∼0.7035ppm of Cd, 0.24∼1.075ppm of Mn, 0.5951∼3.4521ppm of Pb and 0.0321∼0.1936ppm of Zn. 2. The mean value for havy metals for the st D was 0.143ppm, st B was 0.085ppm, st A was 0.046ppm, st E was 0.041ppm, gtC was 0.040ppm of Hg-, 109.504 ㎍/l of T-Cr, 5.0857ppm of Cu, 0.3300ppm of Cd, 0.606ppm of Mn, 2.1331ppm of Pb and 0..0953ppm of Zn.