YANGFang,HEDan-dan,YUANLong-hu,et al.Assessment of Sediment Pollution and Its Resource Utilization in the Water Areas of Hunan Province[J].China Water & Wastewater,2022,38(13):97-104.
Assessment of Sediment Pollution and Its Resource Utilization in the Water Areas of Hunan Province
China Water & Wastewater[ISSN:1000-4062/CN:12-1073/TU]
volume:
第38卷
Number:
第13期
Page:
97-104
Column:
Date of publication:
2022-07-01
- Keywords:
- Hunan Province; sediment; heavy metal; resource utilization
- Abstract:
- The main drinking water sources and receiving waters in Hunan Province include Xiang River, Zi River, Yuan River, Li River and Dongting Lake. The rapid urbanization and unreasonable industrial structure lead to a series of environmental problems in these water areas. To understand the current situation of sediment pollution in the water areas of Hunan Province, this paper sampled sediments in five major water areas in the province, and physical parameters (pH, moisture content), nutritional parameters (organic matter, TCOD, total nitrogen, total phosphorus) and heavy metals (arsenic, cadmium, chromium, copper, nickel, lead, zinc) content of the sediment samples were tested. The pH of the sediment was between 6.64 and 8.66, the moisture content was between 22.5% and 41.0%, and the organic matter content was between 24.0 g/kg and 137.2 g/kg. The spatial distribution of heavy metals in sediment was analyzed by single index method. The heavy metal pollution degree of sediment showed great difference in different water areas. The pollution index of most sampling sites was less than 1, and the pollution evaluation level was clean. However, the average contents of Cd in Li River, Yuan River, Zi River, Xiang River and Dongting Lake were 1.16 mg/kg, 0.53 mg/kg, 1.47 mg/kg, 2.34 mg/kg and 3.57 mg/kg. Cadmium in Xiang River and Dongting Lake reached moderate pollution level, and the content of Cd in the sampling site of Fufeng Fertilizer Company in Dongting Lake was 17.72 times higher than the standard value, which belonged to high pollution level. In summary, the organic matter content in the sediment of most sampling sites was medium or low level, and the sediment was rich in nitrogen and phosphorus, which is in good overall condition. The pollution level of the measured metal at each sampling site was clean or low pollution level, but Cd pollution varied greatly in different water areas. Based on the comprehensive analysis of the physical parameters, nutrient parameters and heavy metal content of the sediment, the paper proposed a resource utilization approach for polluted sediment in Hunan Province.
Last Update:
2022-07-01