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This paper selected Dahuofang Reservoir as the research area, analysed the relationship between water quality and diversion water input, determined the right weight of each index affected the water quality based on correlation analysis and entropy weight method. The results showed that after the diversion water input, the DO is 6739.17t, COD_Mn is 1735.00t, BOD is 625.83t, NH₃-N is12.07t, TP is 12.5t, TN is 1860.75t, coliform-group is 1.38×10¹⁵. The correlation between the indexes of DO, COD_Mn, BOD, TN, coliform-group and water quality is significant after diversion water input. The affected right weights of the amount of TN, coliform-group and NH₃-N input are more than 0.1, the highest right weight is of TN input (0.1804), followed by coliform-group (0.1173) and NH₃-N (0.1165); the most slight one is TP (0.0164). In terms of comprehensive analysis, the influence of each index of diversion water input on water quality of Dahuofang reservoir, the order is TN>coliform-group>NH₃-N>BOD>DO>COD_Mn>TP.

Keywords

Dahuofang Reservoir, Diversion Water Input, Water Quality.

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References

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Effects of Paper Mill Wastewater on Seedling Growth and Antioxidant System of Reeds

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Authors

Fanbin Meng ¹, Fangli Su ¹, Tieliang Wang ¹, Haifu Li ¹

Affiliations
1 College of Water Conservancy, Shenyang Agricultural University, Shenyang, Liaoning, 110866, CN

Source

Nature Environment and Pollution Technology, Vol 14, No 2 (2015), Pagination: 379-384

Abstract

Effects of different concentrations of wastewater (chemical oxygen demands of 300, 175 and 50 mg·L^-1) from a paper mill on seedling growth and antioxidant system in reeds were tested in experimental pools that simulated the wetland ecosystem. Root length, biomass and moisture content, but not shoot moisture content and plant height, significantly increased with increases in wastewater concentration. At 300 mg·L^-1, shoot biomass increased by 52.5% and ischolar_main biomass increased by 73.05% over the control. Malondialdehyde content, production rate of superoxide anions and hydrogen peroxide content all decreased with increasing concentration. At 300 mg·L^-1, malondialdehyde content, production rate of superoxide anions and hydrogen peroxide content were 0.34, 0.24 and 0.16 times, respectively, those of the control in leaves and were 0.25, 0.19 and 0.17 times, respectively, those of the control in ischolar_mains. Superoxide dismutase, peroxidase and catalase activities and ascorbic acid and glutathione contents in reeds significantly increased with increasing concentrations of wastewater. These results suggest that a concentration of 300 mg·L^-1 could improve the activities of antioxidant enzymes, inhibit the generation of reactive oxygen species and reduce the generation of malondialdehyde, thus effectively alleviating the damage caused by salinity in wetland soil.

Keywords

Paper Mill Wastewater, Reactive Oxygen Species, Antioxidant, Seedling Growth.

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