This thesis is about John Thomas; the first missionary sent to the KEHC, the first superintendent and the first dean of Kyungsung Bible Institute. The coverage of this thesis begins from his birth in the U.K. and his ministries, how he came to Korea and his ministry in Korea from 1910-1911. In total, John Thomas spent 10 years serving in Korea, therefore assessing his ministry is somewhat out of proportion, however this thesis will focus on the background of his calling to Korea and the beginning of God’s divine works. 1. John Thomas had evident experience in the Fourfold Gospel. 2. His devotion and faith made him a clear model as Christ’s servant. 3. He was a man of prayer. 4. Through the successful ministry in the U.K. he demonstrated the blessings of God’s presence. 5. He made a network of supporters for prayer and financial aid. 6. He was a prominent Evangelical leader of his time and was selected as the main speaker at the annual OMS conference in 1911. 7. He had a call to preach the holiness element. This calling began to spread in the other denominations and missionaries also. 8. He not only loved the lost souls of Korea but also cared for the people of the world. 9. His ministry had a harmony of teaching and ministering. Through his character which was greatly influenced by the holiness element gave him authority to impress many people. 10. Although he had difficulty in learning Korean, his input and effort was vital in setting the foundations of the KEHC and the Bible Institute. 11. The early records of his ministry which influenced many denominations and other missionaries in Korea and Japan shows how influential he must have been in the later years. 12. He contributed to the printing of 10,000 copies of the New Testament, helped set up administrative procedures for KEHC and the Bible Institute and his teaching, church founding and faithful mission works show the bright future ahead. This research focuses on the early days of John Thomas’s mission. There are still more research to be done about his character and the latter part of his ministry. However, the fact that a man of God, such as John Thomas was called to serve as the first missionary sent to the KEHC, the first superintendent and the first dean of Kyungsung Bible Institute proves God’s purpose toward the KEHC and STU. Furthermore, through this research we need to find the elements that need to be continued and carried out in this day and age. Therefore it is inevitable the existence of holiness is revealed not only in Korea but also worldwide. This is the core value of KEHC and STU’s existence.

산성광산배수가 증발되어 형성된 증발잔류광믈의 생성량과 지구화학적 특성 그리고 산성광산배수의 성분변화를 고찰하였다. 여러 종류의 색을 띄는 증발잔류광물들이 산성광산배수와 접촉하는 암석표면에서 관찰된다. 실험실에서 증발잔류광물을 형성시키기 위하여 폐석탄광(GTa, GTb, GH 및 GB)에서 산성광산배수를 채취하여 자연 건조시켰다. 산성 광산배수가 증발되는 동안 TDS, EC, 주요성분이온과 미량성분이온들의 함량은 증가하지만 E.R.과 DO 값은 증발시간과 함께 감소한다. GTb와 GB 시료의 Fe 농도는 증발 시간과 함께 서서히 증가하나 GH 시료는 증발하루에는 Fe이가 검출되나 그 이후에는 갑자기 검출되지 않는다. 이와 같이 Fe 성분이 검출되지 않는 이유는 비정질 철수산화물이 형성되어 침전되기 때문인 것으로 판단된다. 4 l의 산성광산배수를 80일 동안 자연 건조시킨 후 얻어진 증발잔류광물의 무게는 4 g(GTa), 5 g(GB), 15 g(GH) 및 24 g(GTb)를 각각 얻었다. 생성된 증발잔류광물의 무게와 현장에서 측정한 EC, TDS, 염도, ER, DO 및 pH와의 회귀분석에서 결정계수가 각각 0.98, 0.99, 0.98, 0.88, 0.89 및 0.25로 나타난다. 현장에서 이들 파라메타를 측정한다면 산성광산배수로부터 형성되는 증발잔류광물의 양을 추정하는데 쉽게 이용할 수 있을 것이다. 증발잔류광물의 모든 시료에서 석고와 사리염이 들어 있음을 X-선 회절법으로 확인하였다. GTb 시료를 52, 65, 70, 95, 150, 250 및 350˚C에서 각각 1 시간씩 가열한 후 XRD분석한 결과 석고, CaSO4·1/2H2O 및 케서라이트(kieserite)가 있음을 확인하였다. 가열온도가 증가할수록 석고를 지시해주는 7.66A의 강도, CaSO4·1/2H2O를 지시해주는 5.59A 강도 그리고 케서라이트를 지시하는 4.83A 강도 크기가 탈수작용으로 인하여 서서히 감소한다. SEM 및 EDS분석에서 석고로 판단되는 방사상의 결정 집합체들이 침상과 주상의 결정들로 구성되어 있다. 꽃 모양의 구조를 보이는 GTb 시료는 EDS분석에서 Ca 성분이 검출되지 않는다. Ca 성분이 검출되지 않는 것으로 보아 이 꽃 모양의 증발잔류광물은 사리염으로 판단된다.