Assessing wastewater quality at some coal mines belonging to Dong Bac Coal Corporations

http://jmes.humg.edu.vn/en/archives?article=413
  • Affiliations:

    1 Viện Kỹ thuật và Công nghệ Môi trường;
    2 Trường Đại học Mỏ - Địa chất

  • Received: 21st-June-2015
  • Revised: 18th-July-2015
  • Accepted: 30th-July-2015
  • Online: 30th-July-2015
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Abstract:

Coal Mines No 35, 68, 91, 618 and 790, belonging to Dong Bac Coal Corporations, is a pit coal mine which is located in the area of Quang Ninh province. The analysis results of untreated wastewater samples collecting at the door of the mines were lower compared to the limit standard in pH values from 1.1 to 1.6 times (depending on the moment of collecting). The TSS values were 4.6 to 8.26 times higher than the standard. The values of Fe, Mn and oil and grease were 1.27 ÷ 2.54 times, 1.57 ÷ 6.8 times and 1.63 times higher than the standard, respectively. The COD values from 4 out of 5 monitoring mines, especially during the rainy season, were 1.03 ÷ 1.83 times over the standard.

How to Cite
Dang, T.Xuan and Nguyen, H.Mai 2015. Assessing wastewater quality at some coal mines belonging to Dong Bac Coal Corporations (in Vietnamese). Journal of Mining and Earth Sciences. 51 (Jul, 2015).