干旱区生态环境知识资源中心(Arid): 呼伦湖表层沉积物有机质的释放效应分析

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	呼伦湖表层沉积物有机质的释放效应分析
其他题名	Release Effect of Surface Sediment Organic Matters in Lake Hulun
	王雯雯; 陈俊伊; 姜霞; 李贺; 王书航
来源期刊	环境科学研究
ISSN	1001-6929
出版年	2021
卷号	34 期号:4 页码:1001-6929
中文摘要	沉积物有机质是湖泊物质循环的重要组成部分之一,研究沉积物有机质的赋存和迁移转化特征对于湖泊生态保护具有重要意义.以位于我国寒旱区的蒙新湖区典型代表湖泊---呼伦湖为例,利用连续提取法、三维荧光激发发射矩阵光谱-平行因子法(EEMs-PARAFAC)和碳稳定同位素(delta~(13)C)、碳氮比值(C/N)指标测定,并结合室内模拟试验,研究了呼伦湖表层沉积物有机质的赋存特征、释放效应及影响因素.结果表明:①呼伦湖表层沉积物有机质含量在26.67~ 38.09 g/kg之间,其主要组分为胡敏素(HM),HM占沉积物有机质的相对比例为74.1%.沉积物有机质主要来自于陆源,陆源相对贡献率在80%左右.②沉积物室内静态释放模拟试验结果表明,沉积物有机质释放会导致上覆水中溶解性有机质(DOM)浓度和组分均发生改变,上覆水中溶解性有机碳(DOC)浓度由30.85 mg/L升至37.57 mg/L,类腐殖质组分所占比例升高.沉积物有机质释放还导致上覆水中氮磷浓度升高,其中溶解性总氮(DTN)和溶解性总磷(DTP)的浓度分别升高了0.89和0.16 mg/L.③近年来,呼伦湖流域温度升高,导致呼伦湖沉积物有机质的释放效应增强.研究显示,虽然呼伦湖沉积物有机质主要以难降解组分为主,但是其释放效应对水体碳、氮、磷浓度的影响仍然不容忽视.
英文摘要	Sediment organic matter is one of the important components of lake material cycle.It is of great significance to the environmental protection of lakes to study the characteristics,transportation and transformation of sediment organic matter in lakes.Take Lake Hulun,a typical lake in the Inner Mongolia-Xinjiang lake area located in the cold and arid region of China,as an example,the occurrence characteristics of sediment organic matter in surface sediments,effects of sediment organic matter release and influencing factors were studied using sequential extraction method,three-dimensional fluorescence excitation emission matrix spectrum-parallel factor method (EEMs-PARAFAC),stable carbon isotope (delta13 C),carbon and nitrogen ratio (C/N),and simulating lab test.The results showed that the content of sediment organic matter in the surface sediments of Lake Hulun was 26.67-38.09 g/kg,and the main component of the sediment organic matter was humin (HM),accounting for 74.1%.The sediment organic matter mainly came from the terrestrial sources,with a relative contribution rate of about 80%.The results of static release simulation test of sediments showed that sediment organic matter release lead to changes in the concentration and composition of dissolved organic matter (DOM) in overlying water.The concentration of dissolved organic carbon (DOC) in overlying water increased from 30.85 mg/L to 37.57 mg/L,and the proportion of humus-like components increased.Sediment organic matter release also resulted in the increase of nitrogen and phosphorus in overlying water.The concentrations of dissolved total nitrogen (DTN) and dissolved total phosphorus (DTP) increased by 0.89 and 0.16 mg/L,respectively.In recent years,the temperature in the Lake Hulun Basin increased,and could enhance the sediment organic matter release.This study showed that although the sediment organic matter in Lake Hulun was mainly composed of refractory components,the release effect of the sediment organic matter on the concentrations of carbon,nitrogen and phosphorus in the water could not be ignored.
中文关键词	呼伦湖 ; 沉积物有机质 ; 赋存特征 ; 释放效应
英文关键词	Lake Hulun sediment organic matter occurrence characteristics release effect
类型	Article
语种	中文
国家	中国
收录类别	CSCD
WOS类目	Environmental Sciences & Ecology
CSCD记录号	CSCD:6951446
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/354344
作者单位	王雯雯, 中国环境科学研究院;;中国环境科学研究院, 湖泊水污染治理与生态修复技术国家工程实验室;;国家环境保护湖泊污染控制重点实验室, ;;, 北京;;北京 100012;;100012, 中国.; 陈俊伊, 中国环境科学研究院;;中国环境科学研究院, 湖泊水污染治理与生态修复技术国家工程实验室;;国家环境保护湖泊污染控制重点实验室, ;;, 北京;;北京 100012;;100012, 中国.; 姜霞, 中国环境科学研究院;;中国环境科学研究院, 湖泊水污染治理与生态修复技术国家工程实验室;;国家环境保护湖泊污染控制重点实验室, ;;, 北京;;北京 100012;;100012, 中国.; 李贺, 中国环境科学研究院;;中国环境科学研究院, 湖泊水污染治理与生态修复技术国家工程实验室;;国家环境保护湖泊污染控制重点实验室, ;;, 北京;;北京 100012;;100012, 中国.; 王书航, 中国环境科学研究院;;中国环境科学研究院, 湖泊水污染治理与生态修复技术国家工程实验室;;国家环境保护湖泊污染控制重点实验室, ;;, 北京;;北京 100012;;100012, 中国.
推荐引用方式 GB/T 7714	王雯雯,陈俊伊,姜霞,等. 呼伦湖表层沉积物有机质的释放效应分析[J],2021,34(4):1001-6929.
APA	王雯雯,陈俊伊,姜霞,李贺,&王书航.(2021).呼伦湖表层沉积物有机质的释放效应分析.环境科学研究,34(4),1001-6929.
MLA	王雯雯,et al."呼伦湖表层沉积物有机质的释放效应分析".环境科学研究 34.4(2021):1001-6929.