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| Evaluation on water quality and heavy metal contamination of sediments in Zhouhe River of Tianjin City |
| WANG Wei-Xing1, CAO Shu-Ping1, LI Gong-Ke1, GAO Hong-Sheng1, ZHANG Yan2 |
1. Tianjin Institute of Geological Survey, Tianjin 300191, China;
2. Tianjin Geological and Mineral Testing Center, Tianjin 300191, China |
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Abstract With the rapid development of urbanization, water environment and sediments of many urban rivers have been polluted in China. The Zhouhe River is the largest river in Jixian County, Tianjin, but the river has been polluted over the past 10 years, which made the ecological environment worse. In this paper, the water quality and the pollution of heavy metals in sediments were evaluated for water and its sediments in the Zhouhe River of Jixian County as the medium to provide scientific basis for the comprehensive management of water environment in the future. The research shows that the river water is suitable for agricultural irrigation, but the downstream water is not suitable for agricultural irrigation. The evaluation based on sediment quality standard method shows that Cr, Ni in the sediments have caused moderate pollution, Hg in the upstream sediments has caused serious pollution, and Zn, Cu in the upstream sediments have caused moderate pollution. Results based on the sediment geological accumulation index show that Hg, Zn and Cd in the upper reaches of the river are at the level of Cu, and the intensity of the grade is in the intensity of the country; Cd, Cu, Zn in the upstream sediments are at the level of non-moderate pollution, and Hg is at the level of intense pollution. Comprehensive evaluation of two results show that the major pollutions of heavy metals are Hg, Ni, Cr, and the secondary pollutions of heavy metals are Zn, Cd , Cu in the sediments in Zhouhe River.
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Received: 22 December 2015
Published: 10 April 2017
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