Distribution of phosphorus forms and pollution assessment of sediments in karst canyon reservoirs: A case study of Wanfeng Reservoir

被引：0
|
作者：
Yang L. [1 ,2 ]
Jiao S. [1 ,2 ]
Wang L. [1 ]
Li Y. [1 ,2 ]
Li J. [1 ,2 ]
Wei Z. [1 ,2 ]
机构：
[1] School of Geography and Environmental Science, Karst Research Institute, Guizhou Normal University, Guiyang
[2] State Key Laboratory Incubation Base for Karst Mountain Ecological Environment of Guizhou Province, Guiyang
来源：
Hupo Kexue/Journal of Lake Sciences | 2024年 / 36卷 / 04期
关键词：
bioavailable phosphorus; karst canyon reservoirs; phosphorus forms; pollution evaluation; Sediment; Wanfeng Reservoir;
D O I：
10.18307/2024.0426
中图分类号：
学科分类号：
摘要：
Study on the distribution, influencing factors, and pollution risk of phosphorus forms in karst canyon reservoir sediments is highly concerned in water pollution control and aquatic ecosystem management. The study selected a typical karst canyon reservoir (Wanfeng Reservoir) as the study area. By analyzing the distribution of sediment phosphorus forms, this study identified the influencing factors of the spatial variation of sediment phosphorus forms, and assessed phosphorus pollution. The results showed that (1) the total phosphorus (TP) content in sediments had a range from 79.37 to 438.04 mg/kg, with inorganic phosphorus (IP) accounting for 73.26% to 78.84% of the total. IP was the dominant form of phosphorus in sediments. The content of iron-aluminum-bound inorganic phosphorus (Fe/Al-Pi) was 16.86 to 91.82 mg/kg, which was the dominant form of IP. Weakly adsorbed organic phosphorus (H20-Po) with a content of 0.27 to 8.03 mg/kg was the dominant form of organic phosphorus (OP). (2) Residual phosphorus (Res-P), weakly adsorbed inorganic phosphorus (H20-Pi), calcium-bound inorganic phosphorus (Ca-Pi), potential active inorganic phosphorus (NaHC03-Pi), and iron-aluminum-bound inorganic phosphorus (Fe/Al-Pi) were the main influencing factors causing the spatial variation of TP. The sediment depth had multiple impacts on TP, and significantly influenced by the interaction with other factors. (3) Bioavailable phosphorus (BAP) had a range from 66.97 to 201.46 mg/kg, accounting for 55.6% to 59.6% of total phosphorus. The mean value of phosphorus pollution index and bioavailability index were 0.53 and 0.81, respectively. This indicated that the overall degree of phosphorus pollution in sediments was mild, implying certain pollution risk to the overlying water. In addition to controlling external phosphorus loading, managing sediment phosphorus is also recommended for karst canyon reservoirs to reduce sediment phosphorus release and pollution to the overlying water. © 2024 by Journal of Lake Sciences.
引用
收藏
页码：1131 / 1143
页数：12
相关论文
共 70 条
  • [1] Guo JB, Zhang C, Zheng GC, Et al., The establishment of season-specific eutrophication assessment standards for a water-supply reservoir located in Northeast China based on chlorophyll-a levels, Ecological Indicators, 85, pp. 11-20, (2018)
  • [2] Han N, Yuan XY, Zhou HH, Et al., Distribution characteristics of organic phosphorus in the sediments of rivers entering the Lake Hongze and the effects of exogenous substances on their fraction transformation, J Lake Sci, 32, 3, pp. 665-675, (2020)
  • [3] Varol M., Spatio-temporal changes in surface water quality and sediment phosphorus content of a large reservoir in Turkey, Environmental Pollution, 259, (2020)
  • [4] Li QX, Jin HH, Zhao HP, Et al., Distribution characteristics of sediments phosphorus species of Xiangjiaba Keservoir and release risk, Acta Scientiae Circumstantiae, 42, 9, pp. 182-190, (2022)
  • [5] Wang XQ, iiuan WY, Yi KK., internal phosphate starvation signaling and external phosphate availability have no obvious effect on the accumulation of cadmium in rice, Journal of Integrative Agriculture, 18, 9, pp. 2153-2161, (2019)
  • [6] Zhu Yii, Feng WY, Liu SS, Et al., Bioavailability and preservation of organic phosphorus in lake sediments
  • [7] Insights from enzymatic hydrolysis and P nuclear magnetic resonance, Chemosphere, 211, pp. 50-61, (2018)
  • [8] Cui H, Ou Y, Wang LX, Et al., Distribution and release of phosphorus fractions associated with soil aggregate structure in restored wetlands, Chemosphere, 223, pp. 319-329, (2019)
  • [9] Zhu Y, Li YP, Tang CY, Et al., Effects of the disappearance of seasonal thermal stratification on the mobilization of iron and phosphorus in reservoirs. Southern China—A case of Tianbao Reservoir, Nanning City, J Lake Sci, 33, 4, pp. 1153-1162, (2021)
  • [10] Jiang J, Long YC, Yao XQ, Et al., Fraction distribution and release risk analysis of phosphorus in sediments from Caohai, Guizhou, Acta Scientiae Circumstantiae, 42, 7, pp. 347-358, (2022)
1234567