| 长江口滨岸排污活动对潮滩营养盐环境地球化学过程的影响 |
| 摘要点击 2046 全文点击 1895 投稿时间：2006-03-30 修订日期：2006-05-24 |
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| 中文关键词 营养盐 地球化学过程 排污活动 长江口滨岸潮滩 |
| 英文关键词 nutrients environmental geochemical processes sewage discharging Yangtze estuarine and tidal flat |
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| 中文摘要 |
| 华东师范大学地理系地理信息科学教育部重点实验室,上海200062 |
| 英文摘要 |
| Influences of sewage discharge on environmental geochemical processes of nutrients were investigated in the Yangtze estuarine and tidal flats. The result indicated that the environmental elements obviously responded to sewage discharging. There was obvious enrichment of NH+4-N,TIN,TDP,Ads-P,Fe-P and CFAP+Ca-P in overlying water, surface sediments and its pore waters adjacent to sewage outlets in the Yangtze Estuary. The enrichment of nutrients N and P was considered to be related not only to the inputs of nutrients from sewage outlets, but also to the changes of environmental factors induced by sewage discharge. On the contrary, there was no significant enrichment of NO-x-N in the tidal water, pore waters and surface sediments from the Yangtze Estuary, which showed that external inputs of nutrients was not the primary factor controlling the distributions of NO-x-N. It was also shown that the diffusive fluxes of nutrients N and P across sediment-water interface was markedly higher at sewage outlets than the control sampling sites in tidal flats, indicating that sewage discharge not only increased the accumulation of nutrients N and P in the tidal flats, but also strengthened the exchange processed of nutrients across tidal sediment-water interface. |
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