Combining KMnO4 pre-oxidation and bioaugmented sand filtration to simultaneously treat cyanobacterial bloom lake water and released Mn(II)

The Effect of Pre-Treatments on Atrazine Removal from Source Water by Microbubble Ozonation

“…However, adding Cl 2 as a pre-oxidant in water treatment can lead to the breakdown of the aromatic structures in natural organic matter, resulting in the formation of hydrophilic moieties through an oxidation process, which has potential applications in drinking water treatment (Chu et al 2016;Gan et al 2019). The release of Mn (II) from KMnO 4 in this reaction can oxidize various impurities in raw water (Bai et al 2019;Wang et al 2020a), while the PAC may act as a low-cost adsorbent, which is always used in emergency treatment (Sawana et al 2017;Yao et al 2018). Therefore, this research employed ATZ as the target pollutant to evaluate alternative pre-oxidation methods combined with ozonation.…”

Peroxydisulfate Peroxidation of Cyanobacterial Cells Catalyzed by Non-Graphitic N-Doped Nanodiamonds

“…An ideal removal treatment should remove cyanobacteria without cell rupture and control the release of intracellular compounds. In this regard, chemical pre-oxidation and coagulation or flocculation are employed to destroy the multicellular structures such bacteria form to promote efficient removal via sedimentation [5,6]. However, an oxidant such as chlorine [7,8], ozone [9] or permanganate [10,11] needs to be in contact with cyanobacterial cells for a long time to achieve this, and an extra dose is usually required due to the presence of organic matter and salts in the water [11,12].…”

Formation of Disinfection Byproducts from Algal Organic Matter Exposed to Monochloramine: Effects of Monochloramine Dosages, pH, and Bromide Concentrations

“…A survey showed that in 39% of the water samples (the total number of samples were 1326), phytoplankton biomass contributed more than 10% of the total dissolved organic carbon (DOC), and even in some lakes, phytoplankton contributed 25%-50% of DOC during the low rainfall seasons (Tomlinson et al, 2016). The concentration of chlorophyll a increased to be 4.4 × 10 8 cells/mL, and cyanobacteria biomass was quantified to be 7.7 × 10 7 cells/mL during the bloom events in Chao Lake (as a drinking source), China (Bai et al, 2019). AOM has a high hydrophilic content, high nitrogen content, and low aromatic content, and AOM is highly heterogeneous in molecular weight and polarity distributions (Fang et al, 2010a;Li et al, 2012;Zhou et al, 2014).…”