检索结果-南通市图书馆

The role of extracellular organic matter on the cyanobacteria ultrafiltration process

Journal of Environmental Sciences 2021年第12期33卷 12-20页

作者： Huikai Liang Xin Huang Han Wang Weiying Xu Baoyou Shi Key Laboratory of Drinking Water Science and Technology Research Center for Eco-Environmental ScienceChinese Academy of ScienceBeijing 100085China School of Water Conservancy and Environment University of JinanJinan 250022China University of Chinese Academy of Sciences Beijing 100049China

The membrane fouling caused by extracellular organic matter (EOM) and algal cells and organic matter removal of two typical cyanobacteria (M.aeruginosa and Pseudoanabaena sp.)during ultrafiltration (UF) process were studied in this work.The results showed that EOM had a broad molecular weight (Mw) distribution and the irreversible membrane fouling was basically caused by EOM.Moreover,humic acid and microbial metabolites were major components of EOM of two typical cyanobacteria.Since EOM could fill the voids of cake layers formed by the algal cells,EOM and algal cells played synergistic roles in membrane fouling.Fourier transform infrared spectroscopy analysis indicated that the CH2and CH3chemical bonds may play an important role in membrane fouling caused by EOM.Interestingly,the cake layer formed by the algal cells could trap the organic matter produced by algae and alleviate some irreversible membrane fouling.The results also showed that although the cake layer formed by the algal cells cause severe permeate flux decline,it could play a double interception role with UF membrane and increase organic matter removal efficiency.Therefore,when using UF to treat algae-laden water,the balance of membrane fouling and organic matter removal should be considered to meet the needs of practical applications.

关键词： Cyanobacteria extracellular organic matter Ultrafiltration Membrane fouling Water treatment

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Formation of THMs, Microcystin-LR and Odors from Microcystis Aeruginosa-Derived organic matter

Formation of THMs, Microcystin-LR and Odors from Microcystis...

引用

2014 International Conference on Green Materials and Environmental Engineering (GMEE2014)

作者： Huan Wang Dong-mei Liu Peng Wang Fu-yi Cui State Key Laboratory of Urban Water Resource and Environment Harbin Institute of Technology

Algogenic organic matter（AOM）, including extracellular organic matters（EOM） and intracellular organic matters（IOM） can interfere with drinking water treatment processes and cause water quality problems, among which the formation of disinfection byproducts（DBPs）, microcystins and odor and taste compounds are of particular concern. In this study, the formations of THMs, Microcystins-LR and 2-MIB during four growth phase（lag phase, exponential phase, stationary phase and death phase） were investigated. The THMs formation potential of EOM and IOM were compared. Higher CHCl3 concentration was found in IOM than that in EOM. In the presence of bromide, more brominated-THMs generated, and the TTHMs increased more rapidly in EOM than IOM. The 2-MIB was found a similar trend with the MC-LR in the four growth phase. The total 2-MIB was gradually increased as a function of the time. The formation of MC-LR and 2-MIB depended on algae density.

关键词： Intracellular organic matter extracellular organic matter Disinfection by-product Microcystin-LR 2-MIB

来源： cnki会议评论

在线全文

cnki会议

学校读者我要写书评

暂无评论

欢迎您,

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

请选择保存的检索档案：

请选择收藏分类：

通借通还

欢迎您,

建议与咨询 留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

请选择保存的检索档案： 新增检索档案 确定 取消

请选择收藏分类： 新增自定义分类 确定 取消

通借通还

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

请选择保存的检索档案：

请选择收藏分类：