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DOI | 10.1073/pnas.1920759117 |
Improvement in municipal wastewater treatment alters lake nitrogen to phosphorus ratios in populated regions | |
Tong Y.; Wang M.; Peñuelas J.; Liu X.; Paerl H.W.; Elser J.J.; Sardans J.; Couture R.-M.; Larssen T.; Hu H.; Dong X.; He W.; Zhang W.; Wang X.; Zhang Y.; Liu Y.; Zeng S.; Kong X.; Janssen A.B.G.; Lin Y. | |
发表日期 | 2020 |
ISSN | 0027-8424 |
卷号 | 117期号:21 |
英文摘要 | Large-scale and rapid improvement in wastewater treatment is common practice in developing countries, yet this influence on nutrient regimes in receiving waterbodies is rarely examined at broad spatial and temporal scales. Here, we present a study linking decadal nutrient monitoring data in lakes with the corresponding estimates of five major anthropogenic nutrient discharges in their surrounding watersheds over time. Within a continuous monitoring dataset covering the period 2008 to 2017, we find that due to different rates of change in TN and TP concentrations, 24 of 46 lakes, mostly located in China's populated regions, showed increasing TN/TP mass ratios; only 3 lakes showed a decrease. Quantitative relationships between in-lake nutrient concentrations (and their ratios) and anthropogenic nutrient discharges in the surrounding watersheds indicate that increase of lake TN/TP ratios is associated with the rapid improvement in municipal wastewater treatment. Due to the higher removal efficiency of TP compared with TN, TN/TP mass ratios in total municipal wastewater discharge have continued to increase from a median of 10.7 (95% confidence interval, 7.6 to 15.1) in 2008 to 17.7 (95% confidence interval, 13.2 to 27.2) in 2017. Improving municipal wastewater collection and treatment worldwide is an important target within the 17 sustainable development goals set by the United Nations. Given potential ecological impacts on biodiversity and ecosystem function of altered nutrient ratios in wastewater discharge, our results suggest that long-term strategies for domestic wastewater management should not merely focus on total reductions of nutrient discharges but also consider their stoichiometric balance. © 2020 National Academy of Sciences. All rights reserved. |
英文关键词 | Anthropogenic source; Aquatic ecosystem; Nutrient balance; Wastewater treatment; Water quality change |
语种 | 英语 |
scopus关键词 | nitrogen; phosphorus; nitrogen; phosphorus; Article; China; concentration (parameter); controlled study; explanatory variable; human; monitoring; municipal wastewater; nutrient cycling; population research; priority journal; sedimentation; stoichiometry; sustainable development; trend study; waste water treatment plant; chemistry; ecosystem; environmental monitoring; lake; procedures; waste water; water management; water quality; China; Ecosystem; Environmental Monitoring; Lakes; Nitrogen; Phosphorus; Waste Water; Water Purification; Water Quality |
来源期刊 | Proceedings of the National Academy of Sciences of the United States of America |
文献类型 | 期刊论文 |
条目标识符 | http://gcip.llas.ac.cn/handle/2XKMVOVA/160949 |
作者单位 | Tong, Y., School of Environmental Science and Engineering, Tianjin University, Tianjin, 300072, China; Wang, M., School of Environmental Science and Engineering, Tianjin University, Tianjin, 300072, China; Peñuelas, J., Global Ecology Unit Centro de Investigacion Ecologica y Aplicaciones Forestales (CREAF), Consejo Superior de Investigaciones Científicas (CSIC), Universitat Autònoma de Barcelona (UAB), CSIC, Bellaterra, Barcelona, Catalonia, 08193, Spain, Global Ecology Unit, CREAF, Cerdanyola Del Valles, Barcelona, Catalonia, 08193, Spain; Liu, X., Institute of Surface-Earth System Science, Tianjin University, Tianjin, 300072, China; Paerl, H.W., Institute of Marine Sciences, University of North Carolina-Chapel Hill, Morehead City, NC 28557, United States, College of Environment, Hohai University, Nanjing, 210098, China; Elser, J.J., Flathead Lake Biological Station, University of Montana, Polson, MT 59860, United States; Sardans, J., Global Ecology Unit Centro de Investigacion Ecologica y Aplicaciones... |
推荐引用方式 GB/T 7714 | Tong Y.,Wang M.,Peñuelas J.,et al. Improvement in municipal wastewater treatment alters lake nitrogen to phosphorus ratios in populated regions[J],2020,117(21). |
APA | Tong Y..,Wang M..,Peñuelas J..,Liu X..,Paerl H.W..,...&Lin Y..(2020).Improvement in municipal wastewater treatment alters lake nitrogen to phosphorus ratios in populated regions.Proceedings of the National Academy of Sciences of the United States of America,117(21). |
MLA | Tong Y.,et al."Improvement in municipal wastewater treatment alters lake nitrogen to phosphorus ratios in populated regions".Proceedings of the National Academy of Sciences of the United States of America 117.21(2020). |
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