Degradation and mechanism of microcystin-LR by PbCrO4 nanorods driven by visible light

The performance of TiO2 /NaY-zeolite nanocomposite in photocatalytic degradation of Microcystin-LR from aqueous solutions: Optimization by response surface methodology (RSM)

“…However, the traditional water treatment systems can remove only cyanobacterial cells while having limited capability to remove cyanotoxins and is associated with different practical, economic or environmental disadvantages (14,15). On the other hand, the traditional treatment processes may cause the release of cyanotoxins into the water by ripping the cyanobacterial cells, and potentially increase the risk of secondary pollution (16). Removal of extracellular MC by microfiltration and ultrafiltration techniques is not an effective method because it requires costly pumping of water (17).…”

The synthesis of biotemplate‐based Bi2WO6/TiO2 composite photocatalyst for degradation of microcystin

“…It provides a new direction of biomimetic materials and theoretical data support for the degradation of microcystin. Guoshuai Liu et al 23 used the simple precipitation method to prepare visible light‐driven photo‐catalyst PbCrO 4 , and utilized it for photo‐catalytic degradation of microcystin, reaching the removal rate of MC‐LR up to 100% (reaction time of 27 min), but the heavy metal materials such as Pb, Cr still have the risk of secondary pollution to the aquatic environment. In this study, the low‐cost and easily available Bi 2 WO 6 and TiO 2 are used to prepare the composite catalyst with rice husk as a biological template, which is non‐toxic and harmless to the aquatic environment; Boram Yang et al 80 used light‐emitting diodes (UV‐LEDs) developed by Lumens company, combined with commercial TiO 2 to remove two sorts of cyanobacterial toxins, MC‐LR and ANTX.…”

“…22 In addition, these technologies may cause rupture of algal cells, and release algae toxins into the water body, thereby increasing the risks of secondary pollution. 23 Other effective approaches to substitute the traditional ones are mainly based on the formation of highly oxidized HO$ radicals, called advanced oxidation process (AOP). 20 Nowadays, these AOPs are widely used in the decomposition of MCS, including UV photo-decomposition, UV/H 2 O 2 process, Fenton oxidation, radiation decomposition, TiO 2 photo-catalysis, ultrasonic irradiation, etc.…”

“…However, the conventional water treatment is only effective in removing microcystins in the cells, but there are still residual toxins outside the cells after flocculation and filtration 22 . In addition, these technologies may cause rupture of algal cells, and release algae toxins into the water body, thereby increasing the risks of secondary pollution 23 . Other effective approaches to substitute the traditional ones are mainly based on the formation of highly oxidized HO$ radicals, called advanced oxidation process (AOP) 20 .…”

Microwave-Assisted Synthesis of Chromium Oxide Nanoparticles for Fluorescence Biosensing of Mercury Ions and Molecular Logic Computing

“…Recently, due to their unique physical and chemical properties , and bioactivity, , chromium-based nanomaterials (including Cr 2 O 3 nanoparticles or nanoclusters, CrO 2 and Cr 2 O 3 nanowires, , CrO x N y nanoparticles, Cr 2 S 3 nanoplates, and PbCrO 4 nanorods) have aroused great interest and have potential application prospects in the fields of catalysis, advanced colorants, electrochemical supercapacitors, biomedicine (anticancer, antibacterial and antidiabetic drugs), − and environment repair. , The current methods for synthesizing chromium-based nanomaterials mainly include biosynthesis and physicochemical synthesis − ,, methods. The biosynthesis of chromium oxide nanoparticles (Cr 2 O 3 NPs) by using plant extracts (such as garlic extract and fruit extract of Hyphaene thebaica ) get the attention of researchers.…”