Zeta study of water samples on Ba and Dong Nai river basins

Findings zeta potential in river water samples of Ba and Dong Nai basin in Tay Nguyen area indicated that the properties of colloidal systems in the basin of Ba and Dong Nai river in Tay Nguyen region was relatively stable. The colloidal system was heavily influenced by the pH of the water, not by suspended component. The study also showed the influence of pH value on zeta potential values ​​in river water samples. For the three river water samples, pH values ​​tend to be inversely proportional to the zeta potential. Meanwhile, it is only true for the water samples taken in the middle section and the downstream of Dong Nai river basin, but upstream tended to be directly proportional. In addition, zeta potential in water samples at the regional hydroelectric plant located on 2 river basins, especially water sampled before and after the dams were also studied. The obtained results showed that affects of pH index on the zeta potential values ​​are completely correct and were a good agreement with discovered rules. References Lại Huy Anh va nnk, 2004: Nghien cứu cấu truc địa hinh, địa mạo, địa động lực lưu vực song Ba va song Con. Bao cao chuyen đề Viện Địa lý, Ha Nội. Đỗ Đức Dũng, Nguyễn Vũ Huy, 2012: Bao cao tinh hinh quản li lưu vực song Đồng Nai 2011, Đỗ Tiến Lanh, 2010: Bao cao đề tai KC08 18/06-10 “Quản lý tổng hợp lưu vực va sử dụng hợp li tai nguyen nước lưu vực hệ thống song Đồng Nai”. Lưu trữ tại viện Khoa học Thủy lợi miền Nam. Ngo Đinh Tuấn va nnk, 2007: Quản lý tổng hợp tai nguyen nước lưu vực song Ba, Trường Đại học Thủy lợi, Ha Nội. Nguyễn Viết Phổ, 1999: Tim hiểu song Đồng Nai. Hội nghị khoa học, cong nghệ va moi trường miền Đong Nam Bộ họp tại Đa Lạt 12/1999, http://dalat.gov.vn Nguyễn Viết Phổ, 2003: Tai nguyen nước Việt Nam, Nha xuất bản Nong Nghiệp, trang 137-152. Tran Hong Thai, Tran Thi Van, 2011: Assessment of climate change impacts on salinity intrusion in Hong-Thai Binh and Dong Nai river basins, VNU Journal of Science, Earth Sciences 27, 54-61. Zeta Meter 4.0 Instructor, Zeta-Meter Inc., PO Box 3008, Staunton  VA  24402  USA. 2009. Cổng thong tin quan tắc moi trường, Lưu vực song Đồng Nai, http://www.cem.gov.vn , 01/03/2011.