Abstract
The water eutrophication caused by cyanobacteria seasonally proliferates, which is a hot potato to be resolved for water treatment plants. This study firstly investigated coagulation performance of titanium tetrachloride (TiCl4) for Microcystis aeruginosa synthetic water treatment. Results show complete algal cell removal by TiCl4 coagulation without damage to cell membrane integrity even under harsh conditions; 60 mg/L TiCl4 was effective in removing the microcystins up to 85%. Furthermore, besides having stronger UV254 removal capability and the higher removal of fluorescent substances over Al- and Fe-based coagulants, TiCl4 coagulant required more compact coagulation and sedimentation tanks due to its significantly improved floc growth and sedimentation speed. Meanwhile, its' short hydraulic retention time avoided algal cell breakage and subsequent algal organic matter release. Microcystin concentrations were kept at a low level during sludge storage period, indicating that the TiCl4 flocs could prevent algal cells from natural lysis. To facilitate water recycling without secondary contamination, the algae-containing sludge after TiCl4 coagulation ought to be disposed within 12 days at 20 °C and 8 days at 35 °C.
References
Jul 2, 2003·Water Research·Per HyenstrandKirsten Christoffersen
Jul 30, 2003·Journal of Colloid and Interface Science·D Cory Hopkins, Joel J Ducoste
Jan 14, 2004·Environmental Science & Technology·Wen ChenKarl Booksh
Aug 15, 2006·Water Research·Martin PivokonskyLenka Pivokonska
Jun 28, 2007·Environmental Science & Technology·H K ShonJ H Kim
Apr 20, 2010·Journal of Environmental Sciences (China)·Wendong WangWanpeng Zhu
Jun 22, 2010·Environmental Science & Technology·H K ShonJ-H Kim
Nov 16, 2010·Journal of Hazardous Materials·Y X ZhaoJ-H Kim
Feb 12, 2011·Journal of Hazardous Materials·Y X ZhaoQ Y Yue
Aug 9, 2011·Journal of Hazardous Materials·Weiying XuQinyan Yue
Sep 20, 2011·Chemosphere·Daniel Jančula, Blahoslav Maršálek
Oct 1, 2011·Water Research·Baichuan CaoQinyan Yue
Dec 14, 2011·Water Research·Guofei DaiNanqin Gan
Dec 16, 2011·Water Research·Elke S Reichwaldt, Anas Ghadouani
Jan 3, 2012·Water Research·Lei LiKejia Zhang
Mar 27, 2012·The Science of the Total Environment·Lionel HoGayle Newcombe
Sep 23, 2014·Environmental Technology·Xiuqing LiYuezhong Li
Citations
Sep 19, 2019·Water Environment Research : a Research Publication of the Water Environment Federation·Weihang OuyangJinkai Xue
Jan 7, 2021·Environmental Science and Pollution Research International·Mohammad Rezaei ArdaniAbdul Rahman Mohamed
Oct 25, 2020·Chemosphere·Zhenzhen TangHainan Ai
Mar 8, 2021·Chemosphere·Sayed Mukit HossainHo Kyong Shon
Aug 24, 2020·Ecotoxicology and Environmental Safety·Yunyun ZhuYunsheng Ding
Aug 28, 2021·Journal of Hazardous Materials·Sayed Mukit HossainHo Kyong Shon
Apr 25, 2020·The Science of the Total Environment·Xufeng ZhangRuihua Dai