| 富营养化城市景观水体表观污染下的悬浮颗粒物粒度分布特征 |
| 摘要点击 2042 全文点击 1087 投稿时间：2015-08-03 修订日期：2015-10-23 |
| 查看HTML全文
查看全文 查看/发表评论 下载PDF阅读器 |
| 中文关键词 城市景观水体 表观污染 悬浮颗粒物 粒度 多组分 影响因素 |
| 英文关键词 urban landscape water apparent pollution suspended particulate matter grain size multicomponent impact factors |
| 作者 | 单位 | E-mail | | 贡丹燕 | 苏州科技学院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 215011
苏州科技学院环境科学与工程学院, 苏州 215011 | gongdanyan900201@sina.com | | 潘杨 | 苏州科技学院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 215011
苏州科技学院环境科学与工程学院, 苏州 215011 | panyang@mail.usts.edu.cn | | 黄勇 | 苏州科技学院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 215011 | | | 包伟 | 苏州科技学院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 215011
苏州科技学院环境科学与工程学院, 苏州 215011 | | | 李倩倩 | 苏州科技学院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 215011
苏州科技学院环境科学与工程学院, 苏州 215011 | |
|
| 中文摘要 |
| 悬浮颗粒物粒度分布特征反映城市景观水体表观污染状况,为研究富营养化城市景观水体表观污染与悬浮颗粒物粒度分布的内在联系及其影响因素, 在苏州市市内的典型富营养化河道:枫津河,选取5个代表性取样点,测定水中悬浮颗粒物粒度分布、表观污染指数(SPI)及水质指标,并分析其相关性. 结果表明,富营养型水体中悬浮颗粒物具有相似的粒度分布特征, 粒度分布存在多峰,且出峰位置大致相同,悬浮颗粒物的粒度分布由多个组分叠加构成. 悬浮颗粒物粒度分布最多可分为6个组分,各组分粒径范围分别为<1.5 μm、1.5~8 μm、8~35 μm、35~186 μm、186~516 μm、>516 μm. 组分Ⅲ是优势组分(体积分数均值38.3%~43.2%). 组分Ⅲ体积分数与SPI值、Chl-a浓度呈显著正相关,组分Ⅲ体积分数的增大是该类水体表观污染程度加深的粒度结果表征,该组分体积分数的增大主要来自于藻含量增加; 组分Ⅳ+组分Ⅴ+组分Ⅵ体积分数在有外源时明显高于无外源时,无外源时组分Ⅳ+组分Ⅴ+组分Ⅵ体积分数与SPI值显著负相关,有外源时组分Ⅳ+组分Ⅴ+组分Ⅵ体积分数与SPI值存在较弱的正相关但未达到显著水平. 环境因子(Fv/Fm和DO)和外源因子作用水体主要表观污染物质藻类的含量,进而影响悬浮颗粒物各组分的体积分数和水体表观质量; 水动力条件作用悬浮颗粒物粒径,较大水动力使中值粒径增大,对水体表观质量未产生显著影响. |
| 英文摘要 |
| Grain size distribution characteristics of suspended particulate matter (SPM) reflects the apparent polluted condition of the urban landscape water. In order to explore the internal relationship between the eutrophication of urban landscape water's apparent pollution and grain size distribution of SPM, and its influencing factors, this paper selected five representative sampling sites in Feng Jin River which is a typical eutrophication river in Suzhou City, measured the grain size distribution of SPM, sensation pollution index(SPI)and water quality index, and analyzed their correlation. The results showed that: The rich nutrient water possessed a similar characteristics in grain size distribution. The grain size distribution of SPM in water was multimodal, and the the peak position was roughly the same; the grain size distribution of SPM was composed by multiple components. It could be roughly divided into six parts with the particle size range of every group being<1.5μm, 1.5-8 μm,8-35 μm,35-186 μm,186-516 μm,>516 μm. The component Ⅲ was superior (with an average volume fraction of 38.3%-43.2%), and its volume fraction had a significant positive relation with the SPI value and the Chl-a content. The increase of component Ⅲ volume fraction was the reflection of particle size's result of increasing SPI value. The increase of component Ⅲ volume fraction was mainly derived from the increasing algal content. The volume fraction of group Ⅳ + group Ⅵ +groupⅤ was significantly higher under the condition of exogenous enter. When there was no exogenous component, the volume fraction of group Ⅳ + group Ⅵ +groupⅤ had a significant negative correlation with SPI value; when there were exogenous components, the volume fraction of group Ⅳ + group Ⅵ +groupⅤ had a weak positive correlation with SPI value, but the correlation did not reach a significant level. Environmental factors (Fv/Fm and DO) and exogenous factors had an influence by functioning on the algal content which signified the polluted material, and then affected the volume fraction of particle size's components and the quality of apparent water. Hydrodynamic conditions mainly had a certain influence on the median particle size, and had no effect on the apparent polluted condition of water. |
|
|
|
