Geochemistry and Influence to Environment of Phosphorus in Modern Sediment in Dianchi Lake
-
摘要: 湖泊沉积物中,磷是产生富营养化的重要元素.湖泊中磷元素含量、地球化学行为以及它的复杂矿物学特征,使人们对磷的研究极为重视.滇池湖中总磷超标10.3倍,底泥沉积物中P2O5平均含量0.52%,最高可达1.92%.滇池地处磷矿区,是磷质来源最丰富的湖泊,统计表明,磷含量每年在不断增长.滇池沉积物中磷主要以吸附态、有机态、铁结合态、钙结合态、铝结合态等几种形式存在.这些形态磷在底泥中是不稳定的,它们在环境改变条件下,又将磷释放到水体中.微生物在磷的循环过程中起了重要作用,乳酸菌对不溶性磷酸盐的分解,使湖泊中可溶磷含量增高.聚磷菌对磷元素的富集以及聚磷菌死亡后发生有机磷的矿化作用,是湖泊中水合磷酸盐矿物沉积的重要途径.当湖泊中这种不稳定的水合磷酸盐矿物在条件具备的情况下,经沉积物覆盖成岩作用后,最终形成磷灰石。Abstract: Phosphorus is an important element Which produces eutrophication in lake sediment. People have paid special attention to the phosphorous research according to its content and geochemical activity as Well as complenmineral characteristics in the lake. the total content of phosphorus i n Dianchi lake is 10.3 times as high as normal data. the average content of P2o5 in bottom mud is 0.52 %,and t he highest content reaches 1.92 %. there are many phosphorus mineral deposits， so the source of phosphorus in the lake is very rich. on the basis of statistics,the phosphorus content has been increasi ng every year. the existi ng for ms of phosphorus in Dianchi sediment are mainly in adsorbed form，organic for m and combi ned With Fe,Ca,Al and Sb. these forms of phosphorus in the bottom mud are not stable， easily changing With environment,so phosphorus can be released into the Water body again. Microorganisms play an important role in t he circuation of phosphorus，l actate bacteria can resolve phosphate and make the content of soluble phosphorus increase in the lake. the enrichment of phosphorus can be due to assemble phosphorus bacteria and, after they die，the mineralization of the organic phosphorus is important Way Which result in hydrated phosphate deposit in the lake. When conditions are suitable，the unsteady hydrated phosphate is covered by sediment,after mineralization，it Will become apatite in the end.
-
Key words:
- lake sediment /
- phosphorus geochemistry /
- Dianchi lake environment /
-
[1] 昆明市环境科学研究所. 滇池富营养化调查研究[M]. 昆明:云南科技出版社,1990.146～148[Kunming Institute of Enuironment Science.Investigation of eutrophication in Dianchi Lake [M].Kunming:Yunnan Scionce and Techaology Press,1990.140～148] [2] Williams J D H, Mayer T. Effects of sediment diagenesis and regeneration of phosphorus with special reference to lakes Erie and Ontario[A]. In:Allen H E, Kramer J R.Nutrients in Natural waters[C].New York:Wiley Intersciem, 1972.36～60 [3] A.Lerman主编. 湖泊的化学地质学和物理学[M].王苏民等译. 北京:地质出版社,1989.231～234[A.Leman ed.Chemical geology and Physics of Lake [M].Translated by Wang Sumin.Beijing:Geological Publishing House,1989.231～234] [4] 韩伟明. 杭州西湖底泥释磷及其对富营养化的影响[J]. 环境科学,1992,(3):213～216[Han Weiming.Phosphorus released from bottom mud and its influence in Xihu Lake,Hangzhou[J].Environment Science,1992,(3):213～216] [5] 王雨春,万国江. 红枫湖、百花湖沉积物中磷的存在形态研究[J]. 矿物学报. 2000, 20(3):273～277[Wang Yuchun,Wan Guojiang.Study of the phosphorus existing forms in Hongfeng Lake and Baihua Lake sediments[J].Acta Mineralogica Sinica, 2000,20(3):273～277] [6] 李任伟,李禾,李原等. 黄河三角洲沉积物重金属、氮和磷污染研究[J].沉积学报,2001, 19(4):623～629[Li Renwei,Li He,Li Yuan et al.Study of the heavy metals,Nitrogen and Phosphorus contamination in the sediments of the Yellow River Delta[J].Acta Sedimentologica Sinica,2001,19(4):623～629] [7] Lean D R.Phosphorus dynamics in lake water[J]. Science, 1973, 179:678～679 [8] 金相灿.湖泊富营养化调查规范[M].北京:中国环境科学出版社,1987[Jin Xiangcan.The Investigation Standard of Lake Eutrophication [M].Beijing:China Environmental Science Press,1987] [9] Frossard E, Frossard M, Hedley M J, Reactions controlling the cycling of P in soils[A].In: Tiesser H, ed. Phosphorus in the Global Environment: Transfers, Cycles and Management[C].Chichester: Wiley and Sons Ltd,1995 [10] Smith S V, Areinson M J. Phosphorus limitation of net production in a confined equatic ecosystem[J]. Nature, 1984, 307: 626～629 -
点击查看大图
计量
- 文章访问数: 580
- HTML全文浏览量: 10
- PDF下载量: 382
- 被引次数: 0
下载:
