Ren Jia-Guo, Jia Hai-Bin, Jiao Li-Xin, Wang Yi-Ru, Yang Su-Wen, Wu Qian-Qian, Gao Qiu-Sheng, Cui Zhi-Dan, Hao Zi-Feng
College of Geoscience and Engineering, Shandong University of Science and Technology, Qingdao 266590, China.
State Key Laboratory of Environmental Criteria and Risk Assessment, Chinese Research Academy of Environmental Sciences, Beijing 100012, China.
Huan Jing Ke Xue. 2019 Feb 8;40(2):582-589. doi: 10.13227/j.hjkx.201805002.
To examine the effects of seasonal changes and precipitation on the concentrations of various nitrogen and phosphorus forms in Dianchi Lake, the concentrations of various nitrogen and phosphorus forms of atmospheric deposition were determined by UV spectrophotometry. Additionally, the contributions of nitrogen and phosphorus to water pollution in Dianchi Lake were discussed. The results showed that the atmospheric depositional nitrogen concentration in Dianchi Lake is generally consistent with the characteristics of the low rainy season and high dry season. The nitrogen and phosphorus load of atmospheric deposition was positively correlated with rainfall. Seasonal changes were mainly characterized by low dry season and high rainy season. The atmospheric depositional nitrogen load was dominated by dissolved inorganic nitrogen, which accounted for 63.70% of the total nitrogen deposition load. The phosphorus load was mainly PP, which accounted for 45.54% of the total phosphorus precipitation load. Excessive fertilization and loss of nitrogen and phosphorus from fertilizers are the major sources of nitrogen and phosphorus in atmospheric wet deposition. Combined with data from rivers entering the lake, the settlements of TN and TP in the atmospheric deposition of Dianchi Lake were 6.14% and 12.76% of the river load, respectively. Therefore, the primary source of pollution in Dianchi Lake was still the load brought by the river into the lake. However, the nitrogen and phosphorus fluxes in the atmospheric deposition of Dianchi Lake were at intermediate levels compared with other regions, so this contribution requires further investigation.
为研究季节变化和降水对滇池各种氮磷形态浓度的影响，采用紫外分光光度法测定了大气沉降中各种氮磷形态的浓度。此外，还讨论了氮磷对滇池水污染的贡献。结果表明，滇池大气沉降氮浓度总体上与雨季低、旱季高的特征一致。大气沉降的氮磷负荷与降雨量呈正相关。季节变化主要表现为旱季低、雨季高。大气沉降氮负荷以溶解无机氮为主，占总氮沉降负荷的63.70%。磷负荷主要是颗粒态磷，占总磷沉降负荷的45.54%。施肥过量以及肥料中氮磷的流失是大气湿沉降中氮磷的主要来源。结合入湖河流数据，滇池大气沉降中总氮和总磷的沉降量分别占河流负荷的6.14%和12.76%。因此，滇池的主要污染源仍是河流入湖负荷。然而，与其他地区相比，滇池大气沉降中的氮磷通量处于中等水平，因此这一贡献需要进一步研究。
