| 吴胡.沉湖湿地重金属的来源分析[J].矿产勘查,2024,15(S2):217-225 |
| 沉湖湿地重金属的来源分析 |
| Analysis of heavy metals in Chenhu wetland |
| 投稿时间：2024-07-15 |
| DOI：10.20008/j.kckc.2024s2029 |
| 中文关键词: 沉湖湿地 重金属 来源分析 |
| 英文关键词: Chenhu wetland heavy metals source analysis |
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| 中文摘要: |
| 按照山水林田湖草生态保护和修复要求，依托武汉市多要素城市地质调查示范项目 2020年度(第二批)项目，开展武汉市湿地生态环境地质调查工作。本文以沉湖湿地的表层沉积物、表层土壤重金属为对象，通过系统采集样品进行重金属元素的检测分析，利用正定矩阵因子分解法和主成分分析法分析了重金属的来源，旨在为沉湖湿地重金属污染防控、治理提供重要信息。土壤中重金属主要来源于自然源，贡献率为54. 6%；其次是工业活动产生的污染，贡献率为 25. 5%；农业活动产生的污染占比也较大，贡献率为19. 9%。沉湖湿地保护区周边土地大多数是农业种植区，基本无工业分布。但沉湖为过水湖，丰水期黄丝河水位上涨，二者水域连成一片。仙桃市城区位于黄丝河上游，生活污水和工业废水的排放使得黄丝河水质较差，长期属于 IV类、 Ⅴ类水质。黄丝河水体中携带的重金属元素离子通过交换作用在调查区土壤中聚集，因此沉湖调查区表层土壤中重金属的工业源比农业源占比要大。 |
| 英文摘要: |
| In accordance with the requirements for ecological protection and restoration of the mountains，riv. ers and lakes，and relying on the 2020(second batch) project of the Multi-factor Urban Geological Survey Demonstration Project in Wuhan，the geological survey of the ecological environment of Wuhan's wetlands was car. ried out. In this paper，the heavy metals in the surface sediments and soil of the Chenhu wetland were detected andanalyzed by systematically collecting samples，the source of heavy metals was analyzed by the method of factordecomposition of positive definite matrix and the method of principal component analysis. The heavy metals in thesoil were mainly from natural sources with the contribution rate of 54. 6%，followed by the pollution from industrial activities with the contribution rate of 25. 5%，and the pollution from agricultural activities with the contribution rate of 19. 9%. Most of the land around Chenhu Wetland Reserve is agricultural planting area，and there is no industrial distribution. But the Chenhu is a passageway lake，and during the flood season，the Yellow Silk River rises to a level that separates the two waters of the Liancheng County River. Xiantao City is on the upper reaches of the Yellow River，which has long been classified as class IV and Class V because of its poor water quality causedby domestic and industrial discharges. The heavy metal ions carried by the yellow silk river water accumulated inthe soil of the investigated area through exchange，so the heavy metal sources in the surface soil of the investigated area were larger than the agricultural sources. |
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