Trapped Urban Phosphorus: An Overlooked and Inaccessible Stock in the Anthropogenic Phosphorus Cycle
文献类型： 外文期刊
作者： Chen, Xuanjing 1 ; Cao, Ning 2 ; Kroeze, Carolien 3 ; Lakshmanan, Prakash 1 ; Li, Zheng 2 ; Sun, Ying 1 ; Wu, Jiechen 7 ; Ma, Lin 8 ; Bai, Zhaohai 8 ; Strokal, Maryna 3 ; Zhang, Fusuo 1 ; Chen, Xinping 1 ; Shi, Xiaojun 1 ;
作者机构： 1.Southwest Univ, Coll Resources & Environm, Interdisciplinary Res Ctr Agr Green Dev Yangtze Ri, Chongqing 400715, Peoples R China
2.Jilin Univ, Coll Plant Sci, Changchun 130012, Peoples R China
3.Wageningen Univ & Res, Earth Syst & Global Change Grp, NL-6708 PB Wageningen, Netherlands
4.Minist Agr & Rural Affairs, Key Lab Sugarcane Biotechnol & Genet Improvement G, Nanning 530007, Peoples R China
5.Guangxi Acad Agr Sci, Sugarcane Res Inst, Guangxi Key Lab Sugarcane Genet Improvement, Nanning 530007, Peoples R China
6.Univ Queensland, Queensland Alliance Agr & Food Innovat, St Lucia, Qld 4067, Australia
7.KTH Royal Inst Technol, Dept Sustainable Dev Environm Sci & Engn SEED, SE-10044 Stockholm, Sweden
8.Chinese Acad Sci, Inst Genet & Dev Biol, Ctr Agr Resources Res, Key Lab Agr Water Resources, Shijiazhuang 050021, Peoples R China
关键词： urban expansion; waste disposal; legacy phosphorus; recycling; crop production
期刊名称：ENVIRONMENTAL SCIENCE & TECHNOLOGY （ 影响因子：11.3； 五年影响因子：12.4 ）
ISSN： 0013-936X
年卷期： 2024 年 58 卷 43 期
页码：
收录情况： SCI
摘要： Urban landscapes are high phosphorus (P) consumption areas and consequently generate substantial P-containing urban solid waste (domestic kitchen wastes, animal bones, and municipal sludge), due to large population. However, urbanization can also trap P through cultivated land loss and urban solid waste disposal. Trapped urban P is an overlooked and inaccessible P stock. Here, we studied how urbanization contributes to trapped urban P and how it affects the P cycle. We take China as a case study. Our results showed that China generated a total of 13 (+/- 0.9) Tg urban trapped P between 1992-2019. This amounts to 6 (+/- 0.5) % of the total consumed P and 9 (+/- 0.6) % of the chemical fertilizer P used in China over that period. The loss of cultivated land accounted for 15% of the trapped urban P, and half of this was concentrated in three provinces: Shandong, Henan, and Hebei. This is primarily since nearly one-third of the newly expanded urban areas are located within these provinces. The remaining 85% of trapped urban P was associated with urban solid waste disposal. Our findings call for more actions to preserve fertile cultivated land and promote P recovery from urban solid waste through sound waste classification and recycling systems to minimize P trapped in urban areas.
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