| Zhumadian City Suya Lake Reservoir is the object of study of this paper, reservoir surfacesediments （0-20cm） were determined and analyzed by the means of field environmental investigation,sample collection and laboratory experiments.such as: main heavy metal binding phase organic carbon（OC）,acid volatile sulfides（AVS）, fine particulate matter and heavy metals total,simultaneously extractedheavy metals （SEM）, the heavy metal content of the different forms etc.This paper explores the spatialdistribution in surface sediments from the combination of phase and changes in the characteristics and thecombination of phase and the binding capacity of the different heavy metals in size.This article is divided into seven sections:Part I: Including research background, progress in the study at home and abroad, the mainresearch contents of this paper, research methods and technologies routes etc.Part II: Study area. Including the Suya Lake Reservoir basin in which the natural, social andeconomic development, the main environmental issues, as well as the Suya Lake Reservoir sediment heavymetal pollution study.Part III: This part mainly introduces layout scheme of the sampling point, sample collection,transport, preservation and laboratory determination and analysis methods.Part IV: Analysis and discuss the total content of Cr, Cd, Cu, Pb, Zn and Ni heavy metals insediments of the Suya Lake Reservoir and the spatial distribution and changes in characteristics.Part V: This part investigates the determination of analysis methods and conditions of acidvolatile sulfides （AVS） and simultaneously extracted heavy metals （SEM） in the sediments, according tothe measured data, the distribution characteristics and sources of the AVS and SEM of the Suya LakeReservoir in surface sediments, and AVS on content of each heavy metals in the SEM and simultaneousextraction of heavy metals bioavailability were analyzed and discussed. By anaiyzing SEM/AVS ratio andSEM-AVS difference, analyze and evaluate the biological toxicity of heavy metals in surface sediments ofthe Suya Lake Reservoir. Part VI: By sediment sampling point organic carbon （OC） and organically bound heavy metalsdetermination to explore the sources and the spatial variation characteristics of Suya Lake Reservoirsediment organic carbon, as well as organic carbon in sediments of different contents of heavy metals.Part VII: through the sediment sampling point of the analysis of fine particulate matterdetermination to explore the space of the Suya Lake Reservoir surface sediment grain size distributioncharacteristics, as well as the relationship between the average sediment grain size and heavy metal content.Part VIII: The main findings and conclusions.Through the above research and analysis, concluded as follows:（1） the content of Pb in14.042-39.724mg.kg-1, an average of27.354mg.kg-1; Zn content in26.906-197.888mg.kg-1, an average of112.13mg.kg-1; Cr content in33.359-179.141mg.kg-1, an averageof75.472mg.kg-1; Cd content in0.167-0.980mg.kg-1, an average of0.408mg.kg-1; the content of Cu in16.316-47.746mg.kg-1, an average of29.951mg.kg-1; Ni content in19.245-54.896mg.kg-1, an averageof36.533mg.kg-1; with reference to Chinese soil background value, have a certain pollution, especiallyCd, Zn in the sewage outfall location and in the middle of the lake pollution is serious.（2） in65surface sediment samples of Suya Lake Reservoir, AVS have bigger difference, thecoefficient of variation is66.75, the maximum value of8.704μmol.g-1, minimum value is only0.309μmol.g-1, average2.888μmol.g-1. The heavy metal and sulfide binding capacity of different, throughresearch the various SEM content accounted for the total amount of heavy metals in the percentage of Cu32.60%, Ni26.76%, Pb9.79%, Cd9.12%, Zn5.037%, Cu> Ni> Pb> Cd> Zn.（3） Suya Lake Reservoir organic carbon content between0.316-3.465, an average of1.70, thevariation coefficient was38.93, changes the difference. The maximum value appeared in the reservoir areaof Suya Lake Trapa planting area of37sampling points from the lake in the northwest to the southeast,position location has larger trend, obvious changes. Organic carbon and organic combination of no evidentcorrelation between heavy metals, the heavy metals are not the same, wherein the organic combination ofmetals for sediment heavy metals content were: Cu:8.06%; Pb:6.52%; Zn:6.50%; Cr:6.16%; Cd:2.37%;Ni:11.37%. Organic carbon and heavy metal binding ability of Ni> Cu> Pb> Zn> Cr> Cd. （4） Suya Lake reservoir sediment particle size finer, belong to typical plain reservoir sediment,water flow rate is slow, low ability of carrying particulate matter. Heavy metals Cu, Pb, Cr, Ni and sedimentaverage particle size was negatively correlated; on the whole is negatively related to Zn. |
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