无机型城市景观水体表观污染的悬浮颗粒物粒度分布特征：以中国运河苏州段为例  

Grain Size Distribution Characteristics of Suspended Particulate Matter as Influenced by the Apparent Pollution in the Inorganic Type Urban Landscape Water: Taking the Canal of Suzhou Section as Example

作　　者：李倩倩[1,2] 潘杨[1,2] 贡丹燕 黄勇[1] 夏侯刚 

机构地区：[1]苏州科技大学环境生物技术研究所,江苏省环境科学与工程重点实验室,苏州215009 [2]苏州科技大学环境科学与工程学院,苏州215009 [3]苏州市环境应急与事故调查中心,苏州215009

出　　处：《环境科学》2016年第12期4662-4670,共9页Environmental Science

基　　金：国家自然科学基金重点项目(50938005);江苏省特色优势学科二期立项项目;江苏省水处理技术与材料协同创新中心项目

摘　　要：基于悬浮颗粒物粒度分布特性能为水环境表观质量研究提供重要信息,以流经苏州市市内运河水为研究对象,探讨无机型城市景观水体中不同表观污染程度下水中悬浮颗粒物的粒度分布特性及其影响因素,从悬浮颗粒物的粒径角度来解释无机型景观水体表观污染机制.结果表明,无机型水中悬浮颗粒物以单峰分布为主,中值粒径范围13-25.2μm,组分Ⅱ（粒级3.8-16μm）是优势组分,体积分数范围29.4%-59.6%;水体表观污染的敏感组分为组分Ⅱ（粒级3.8-16μm）和组分Ⅳ（粒级32-64μm）,表观污染指数（SPI）与组分Ⅱ和组分Ⅳ体积分数关系具有分段性,分段节点是浊度为45NTU处,浊度小于45NTU时,SPI值与组分Ⅱ体积分数呈显著正相关,与组分Ⅳ体积分数呈显著负相关;当浊度大于或等于45NTU时关系相反.影响苏州运河水粒径分布的因素主要是生物因子和水动力条件,生物因子的作用主要表现为藻类的增加,水动力条件的作用是使水体发生再悬浮,导致水中大颗粒物质的增加.Grain size distribution characteristics of suspended particulate matter（ SPM） provides important information for water environment apparent quality. The size distribution characteristics and influencing factors of suspended particulate matter under different apparent pollution levels in the inorganic type urban landscape water were discussed taking the canal which is flowing through Suzhou as the research object. The apparent pollution mechanism of inorganic type urban landscape water was explained from the aspect of the size of the suspended particles. The results showed that： SPM had mainly a uni-modal distribution in the inorganic type water,and the median particle diameter range was 13-25. 2 μm. The component Ⅱ was perdominant,and the particle size range was 3. 8-16μm（ with an average volume fraction of 29. 4%-59. 6%）. Sensitive components of the apparent polluted water were component Ⅱ and component Ⅳ（ particle size range 32-64 μm）. The relation of the sensation pollution index（ SPI） and component Ⅱ was segmented,and the node was 45 NTU. When the turbidity was less than 45 NTU,SPI value and volume fraction of component Ⅱ had a significant positive correlation,and volume fraction of component Ⅳ had a significant negative correlation with SPI value; when the turbidity was equal to or greater than 45 NTU,the correlation was the opposite. The influencing factors of particle size distribution of Suzhou canal mainly included organisms and hydrodynamic conditions. The biological factors mainly led to increase of the algae and the hydrodynamic condition caused resuspension and increased the large particles.

关 键 词：悬浮颗粒物 城市景观水体 表观污染效应 粒度 组分 

分 类 号：X52[环境科学与工程—环境工程]