The vertical distribution of P forms and significance in a sediment core from Honghu Lake, China
ZHENG Huang1, YANG Dan2,3, JIN Meng-yun1, HU Tian-peng1, XING Xin-li1,3
1. School of Environmental Studies, China University of Geosciences, Wuhan 430074, China;
2. Faculty of Engineering, China University of Geosciences, Wuhan 430074, China;
3. State Key Laboratory of Biogeology and Environmental Geology, China University of Geosciences, Wuhan 430074, China
A sediment core was collected from central Honghu Lake at the end of 2014 and the P forms, total nitrogen, organic mater in sediment samples were analyzed. The results indicated that the average concentrations of TP, TN and OM were higher than the corresponding threshold value of sediment quality in Ontario, which presented a different pollution levels. Correlation analysis indicated that Fe/Al-P and OP were the main contributors to TP in sediment core. The vertical distribution of P forms could be divided into 3periods according to 137Cs and 210Pb dating results. The concentration of Ca-P was the highest than other forms reveled that the source of P in sediment was controlled by natural processes before 1952. During 1950s~1980s, the increasing of Fe/Al-P and OP concentrations were related to industrial and agricultural activities, while the decreasing of Ca-P might result from the hydrological change of Honghu Lake. After 1980s, the concentrations of P forms presented an increasing trend except Ca-P. The positive Person correlation between P forms and socioeconomic index (population, grain production, fertilizer usage and purse seine fishing area) of Honghu Lake indicated that anthropogenic activities were the main sources of P input into the lake.
郑煌, 杨丹, 金梦云, 胡天鹏, 邢新丽. 洪湖沉积柱中磷形态的垂直分布及指示意义[J]. 中国环境科学, 2017, 37(4): 1540-1547.
ZHENG Huang, YANG Dan, JIN Meng-yun, HU Tian-peng, XING Xin-li. The vertical distribution of P forms and significance in a sediment core from Honghu Lake, China. CHINA ENVIRONMENTAL SCIENCECE, 2017, 37(4): 1540-1547.
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