环境工程学报2024，Vol.18Issue(12)：3394-3404,11.DOI:10.12030/j.cjee.202401087
基于物质流分析的1980-2020年长江经济带磷素流动特征分析
Characterization of phosphorus flow in the Yangtze River economic zone from 1980 to 2020 based on substance flow analysis
摘要
Abstract
Exploring the process of phosphorus flow in the Yangtze River economic zone can clarify the key links of phosphorus production and consumption from a holistic perspective,which is of great significance to alleviate the"three phosphorus"problem and optimize the management of phosphorus in the Yangtze River economic zone.Substance flow analysis(SFA)was used to quantify the flow of phosphorus in the Yangtze River economic zone,and the interannual changes in the composition and space of phosphorus between 1980 and 2020 were analyzed.The results showed that from 1980 to 2020,the phosphorus utilization rate of phosphorus chemical and food production processes in the Yangtze River economic zone decreased from 69.32％and 55.98％to 46.18％and 44.36％,respectively;inorganic phosphorus fertilizer input and crop harvesting output were the main components of input and output in the Yangtze River economic zone,accounting for 49.92％and 43.97％of the input and output,respectively.Therefore,the crop cultivation subsystem was the key link of phosphorus flow.Improving the utilization rate of agricultural nutrients and appropriately adjusting the dietary structure of the population could help to improve the utilization rate of phosphorus;the phosphorus input volume of the middle and lower reaches of the Yangtze River economic zone cities rose significantly,and the intensity of phosphorus inputs showed an increasing trend from upstream to downstream.Pollution in the cities along the middle and upper reaches of the Yangtze River were dominated by phosphorus chemical pollutants,and more attention should be paid to the comprehensive utilization efficiency of phosphorus tailings,phosphorus gypsum and other phosphorus chemical waste;while the sources of phosphorus-containing pollution in the downstream cities were mainly from the life of residents,so wastewater collection should be strengthened,sewage treatment effectiveness should be improved.The results of this study can provide a reference for precise phosphorus management in the Yangtze River economic zone.关键词
长江经济带/磷素流动/物质流分析法/流域环境管理Key words
Yangtze River economic zone/phosphorus flow/substance flow analysis/watershed environmental management分类
资源环境引用本文复制引用
韩竺轩,张美一,李立青,张洪..基于物质流分析的1980-2020年长江经济带磷素流动特征分析[J].环境工程学报,2024,18(12):3394-3404,11.基金项目
国家重点研发计划资助项目(2022YFC3203304) （2022YFC3203304）
