巢湖城市内河沉积物不同形态磷空间分布特征
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摘要
对巢湖市城市内河的表层沉积物及柱状沉积物进行了采样,并采用修正后的标准测试程序(SMT)测定了其中的总磷(TP)、无机磷(IP)、有机磷(OP)、铁/铝磷(Fe/Al-P)和钙磷(Ca-P),分析了各形态磷之间以及与沉积物有机质之间的相关性.结果表明,表层沉积物TP的质量分数在832.09～2 572.41mg.kg-1之间,其中以Fe/Al-P为主,占总磷的比例为42.0%～62.3%.采样点各形态磷随深度的增加总体呈现先升高后下降的趋势,但不同采样点出现峰值的深度有所不同,这种空间分布特征能够较好反映周边环境现状和入河污染负荷的变化.不同深度沉积物中各形态磷之间存在极显著的相关性(概率水平P<0.01),各形态磷与有机质也存在极其显著的正相关.
Total phosphorus(TP),inorganic-phosphorus(IP),organic-phosphorus(OP),Fe/Al-bound phosphorus(Fe/Al-P) and Ca-bound phosphorus(Ca-P) in surface sediments and sediment cores of urban rivers in Chaohu City of Anhui Province were measured based on the modified standard measurement and test(SMT) procedure of phosphorus forms in the freshwater sediments.The correlations between phosphorus forms and organic matter content were also analyzed.The results show that the TP content in surface sediments varies from 832.09 to 2 572.41 mg·kg-1.Fe/Al-P is the major phosphorus species,and accounts for 42.0%～62.3% of TP.With the increase of depth,the trends of all phosphorus forms first increase and then decrease,and different sampling sites have different peak depths,which can well indicate surrounding environment status and changes in pollution load into the river.For the sediments of different depths,there are significant(P<0.01) positive correlations between all phosphorus forms,and the correlations between organic matter contents and different phosphorus forms are also significant.
Total phosphorus(TP),inorganic-phosphorus(IP),organic-phosphorus(OP),Fe/Al-bound phosphorus(Fe/Al-P) and Ca-bound phosphorus(Ca-P) in surface sediments and sediment cores of urban rivers in Chaohu City of Anhui Province were measured based on the modified standard measurement and test(SMT) procedure of phosphorus forms in the freshwater sediments.The correlations between phosphorus forms and organic matter content were also analyzed.The results show that the TP content in surface sediments varies from 832.09 to 2 572.41 mg·kg-1.Fe/Al-P is the major phosphorus species,and accounts for 42.0%～62.3% of TP.With the increase of depth,the trends of all phosphorus forms first increase and then decrease,and different sampling sites have different peak depths,which can well indicate surrounding environment status and changes in pollution load into the river.For the sediments of different depths,there are significant(P<0.01) positive correlations between all phosphorus forms,and the correlations between organic matter contents and different phosphorus forms are also significant.
引文
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[2]王世亮,王志刚,王萍,等.大辽河水系沉积物剖面磷的形态和分布特征[J].环境科学,2009,30(12):3494.WANG Shiliang,WANG Zhigang,WANG Ping,et al.Chemicalforms and distribution of phosphorus in the sediment profiles ofthe daliaohe river systems[J].Environmental Science,2009,30(12):3494.
[3]Medeiros J J G,Cid B P,Gomez E F.Analytical phosphorusfractionation in sewage sludge and sediment samples[J].AnalBioanal Chem,2005,381:873.
[4]Castelltort S,Van den Driessche J.How plausible are high-frequency sediment supply-driven cycles in the stratigraphicrecord?[J].Sedimentary Geology,2003,157(1-2):3.
[5]侯立军,刘敏,许世远,等.长江口岸带柱状沉积物中磷的存在形态及其环境意义[J].海洋环境科学,2001,20(2):7.HOU Lijun,LIU Min,XU Shiyuan,et al.Species of phosphorusin core sediments from the Changjiang Estuary and itsenvironmental significance[J].Marine Environmental Science,2001,20(2):7.
[6]岳维忠,黄小平.珠江口柱状沉积物中磷的分布特征及其环境意义[J].热带海洋学报,2005,24(1):21.YUE Weizhong,HUANG Xiaoping.Distribution characteristicsof phosphorus in core sediments from Zhujiang River Estuaryand its environmental significance[J].Journal of TropicalOceanography,2005,24(1):21.
[7]张路,范成新,池俏俏,等.太湖及其主要入湖河流沉积磷形态分布研究[J].地球化学,2004,33(4):423.ZHANG Lu,FAN Chengxin,CHI Qiaoqiao,et al.Phosphorusspecies distribution of sediments in kake Taihu and its maininflow rivers[J].Geochimica,2004,33(4):423.
[8]Kevin G T,Philip N O.Sediments in urban river basins:areview of sediment-contaminant dynamics in an environmentalsystem conditioned by human activities[J].J Soils Sediments,2009,9:281.
[9]吕永鹏,徐启新,杨凯,等.城市河流生态修复的环境价值及实现机制[J].水利学报,2010,41(3):275.LV Yongpeng,XU Qixin,YANG Kai,et al.Environmental valueof urban river eco-restoration and its realization mechanism[J].Journal of Hydraulic Engineering,2010,41(3):275.
[10]Lukkari K,Leivuori M,Hartikainen H.Vertical distribution andchemical character of sediment phosphorus in two shallowestuaries in the baltic sea[J].Biogeochemistry,2008,90:171.
[11]Triplett L D,Engstrom D R,Edlund M B.A whole-basinstratigraphic record of sediment and phosphorus loading to theSt.Croix River,USA[J].J Paleolimnol,2009,41:659.
[12]林悦娟,吴峰,邓南圣,等.武汉东湖上覆水和沉积物中磷形态的垂直分布特征[J].农业环境科学学报,2005,24(6):1152.LIN Yuejuan,WU Feng,DENG Nansheng,et al.Phosphorusfractions and vertical profiles in sediment core and overlyingwater of Donghu Lake[J].Journal of Agro-EnvironmentScience,2005,24(6):1152.
[13]俞林伟,谭镇,钟萍,等.广州流花湖底泥磷的垂直变化特征[J].生态环境,2007,16(5):1358.YU Linwei,TAN Zheng,ZHONG Ping,et al.Verticaldistribution of phosphorus in the sediments of Liuhuahu lake,Guangzhou,southern China[J].Ecology and Environment,2007,16(5):1358.
[14]朱广伟,陈英旭.沉积物中有机质的环境行为研究进展[J].湖泊科学,2001,13(3):272.ZHU Guangwei,CHEN Yingxu.A review of geochemicalbehaviors and environmental effects of organic matter insediments[J].Journal of Lake Sciences,2001,13(3):272.
[15]Pant H K,Reddy K R.Phosphorus sorption characteristics ofestuarine sediments under different redox conditions[J].Journal of Environmental Quality,2001,30(4):1474.
目录