中文关键词春季溶解性有机物(DOM)生态净化系统光学特性影响因素 英文关键词springdissolved organic matter (DOM)ecological purification systemoptical propertiesinfluencing factor

作者	单位	E-mail
马睿	盐城工学院环境科学与工程学院, 盐城 224000 江苏大学环境与安全工程学院, 镇江 212013	maryjiangsu@163.com
李璇	盐城工学院环境科学与工程学院, 盐城 224000	lixuan8781687626@sohu.com
王莲	盐城工学院环境科学与工程学院, 盐城 224000 江苏大学环境与安全工程学院, 镇江 212013
王家新	盐城工学院环境科学与工程学院, 盐城 224000
马卫星	盐城工学院环境科学与工程学院, 盐城 224000
丁成	盐城工学院环境科学与工程学院, 盐城 224000	ycdingc@163.com
吴向阳	江苏大学环境与安全工程学院, 镇江 212013

中文摘要 为了探究生态净化系统中溶解性有机物（DOM）的光学特性、空间分布特征及主要影响因子.以盐龙湖生态净化系统为例，取2017、2018年春季数据进行研究.结果表明，盐龙湖春季总磷、总氮、高锰酸盐指数浓度变化范围分别为0.05~0.25、1.25~2.75、3.99~7.17 mg·L^-1，出水溶解氧升高至（11.93±1.31）mg·L^-1、浊度降低至（13.23±2.24）NTU，而高锰酸盐指数变化不显著.主成分分析（PCA）表明盐龙湖原水、预处理区水质与外源汇入有关；而沉水植物区和深度净化区水质依赖于内源影响.荧光指数、腐殖化指数及生物源指数分析综合发现水体中DOM主要是源于陆生植物与土壤输入，腐殖化程度较低且新生的自生源DOM较多.PARAFAC模型将DOM可分为紫外光区类富里酸（239 nm，304 nm/407 nm），可见光区类富里酸（256 nm，352 nm/439 nm），色氨酸类蛋白质（276 nm/327 nm）和胡敏酸（292 nm，395 nm/491 nm）.紫外吸收指数表明盐龙湖原水、预处理单元、挺水植物区DOM光谱强度波动较大，沉水植物区、深度净化区DOM光谱强度较稳定.水质参数中对DOM光学特性有影响的因素主要是透明度、溶解氧、电导率、总氮和藻细胞数. 英文摘要 An investigation the optical properties and spatial distribution of dissolved organic matter (DOM) in an ecological purification system and the primary factors that affect the optical properties of the DOM was conducted. Taking the Yanlong Lake ecological purification system as an example, data from spring 2017 and 2018 were compared. The results show that the concentrations of total phosphorus and total nitrogen and the permanganate index in Yanlong Lake were 0.05-0.25, 1.25-2.75, and 3.99-7.17 mg·L^-1, respectively. In addition, the dissolved oxygen in the effluent of Yanlong Lake increased to (11.93±1.31) mg·L^-1, and the turbidity decreased to (13.23±2.24) NTU, while the change in the permanganate index was not significant. Principal component analysis (PCA) showed that the water quality of the Yanlong Lake raw water and water in the pre-treatment area was closely related to the inflow of exogenous sources, while the water quality in submerged plant areas and deep purification areas was dependent on endogenous effects. According to the fluorescence index, humification index, and biological source index analysis, it was found that there are new spontaneous sources of DOM in this body of water, the degree of humification is lower, and endogenous biological DOM is dominant. The PARAFAC model can be used to classify DOM into UV-fulvic acid-like components (239 nm, 304 nm/407 nm), visible light fulvic acid-like components (256 nm, 352 nm/439 nm), tryptophan-like protein (276 nm/327 nm) and humic acid (292 nm, 395 nm/491 nm). The UV absorption index indicates that the spectral intensity of DOM in the raw water, pretreatment unit, and emergent water plant area of Yanlong Lake fluctuates greatly, and the DOM spectral intensity of the submerged plant area and deep purification area is relatively stable. The factors affecting the optical properties of the DOM in terms of water quality parameters are mainly transparency, dissolved oxygen, conductivity, total nitrogen, and algae cell number.

PDF全文下载地址:

https://www.hjkx.ac.cn/hjkx/ch/reader/create_pdf.aspx?file_no=20190425&flag=1&journal_id=hjkx&year_id=2019