| Title: | An integrated method for controlling the offensive odor and suspended matter originating from algae-induced black blooms |
| Author(s): | Chen C; Shi X; Yang Z; Fan F; Li Y; |
| Address: | "State Key Laboratory of Lake Science and Environment, Nanjing Institute of Geography and Limnology, Chinese Academy of Sciences, Nanjing 210008, China; College of Environmental Science and Engineering, China West Normal University, Nanchong 637009, China. State Key Laboratory of Lake Science and Environment, Nanjing Institute of Geography and Limnology, Chinese Academy of Sciences, Nanjing 210008, China; Jiangsu Collaborative Innovation Center of Regional Modern Agriculture & Environmental Protection, Huaian 223300, China. Electronic address: xlshi@niglas.ac.cn. State Key Laboratory of Lake Science and Environment, Nanjing Institute of Geography and Limnology, Chinese Academy of Sciences, Nanjing 210008, China. State Key Laboratory of Lake Science and Environment, Nanjing Institute of Geography and Limnology, Chinese Academy of Sciences, Nanjing 210008, China; University of Chinese Academy of Sciences, Beijing 100049, China. College of Environmental Science and Engineering, China West Normal University, Nanchong 637009, China" |
| DOI: | 10.1016/j.chemosphere.2019.01.072 |
| ISSN/ISBN: | 1879-1298 (Electronic) 0045-6535 (Linking) |
| Abstract: | "Potentially toxic algae-induced black blooms can trigger crises in urban water supplies and have fatal effects on aquatic ecosystems. Urgent disposal methods to mitigate the taste and odor are imperative for ensuring the safety of the drinking water supply. In this study, we tested three oxidants and two flocculants to improve water quality after the occurrence of a black bloom. The results indicated that a two-step integrated treatment process is efficient as an urgent disposal measure. The first step is removal of volatile organic sulfide compounds (VOSCs) through the addition of H(2)O(2). A total of 50?ª+mg/L of H(2)O(2) can largely decrease the concentrations of dimethyl trisulfide and related alkyl sulfide compounds in the water column. The second step is the flocculation and sedimentation of black-bloom-induced black matter via a chitosan-modified clay. The addition of 1?ª+g/L of an attapulgite clay plus 10?ª+mg/L of chitosan can effectively deposit suspended matter on the bottom of the water column and have a positive effect on the removal of nutrients" |
| Keywords: | Chitosan/chemistry Clay/chemistry Drinking Water/chemistry *Eutrophication Flocculation Hydrogen Peroxide/pharmacology *Odorants Sulfides/isolation & purification Volatile Organic Compounds/isolation & purification Water Purification/*methods Black blooms; |
| Notes: | "MedlineChen, Chao Shi, Xiaoli Yang, Zhen Fan, Fan Li, Yunxiang eng England 2019/01/21 Chemosphere. 2019 Apr; 221:526-532. doi: 10.1016/j.chemosphere.2019.01.072. Epub 2019 Jan 11" |
