Kinetics of Cell Inactivation, Toxin Release, and Degradation during Permanganation of <i>Microcystis aeruginosa</i>

Li, Lei; Shao, Chen; Lin, Tsair Fuh; Shen, Jiayu; Yu, Shuili; Shang, Ran; Yin, Daqiang; Zhang, Kejia; Gao, Naiyun

doi:10.1021/es405014g

Cited by 90 publications

(31 citation statements)

References 34 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…These releases of toxins were observed at both pH levels and all three KMnO 4 doses. The release of toxins from M. aeruginosa and accumulation of toxins in aqueous solution were also documented by Fan et al () and Li et al (), albeit at higher KMnO 4 concentrations and longer CTs. It is possible that these differences were influenced by variations in M. aeruginosa strain type, strain age, and culturing conditions used by different laboratories.…”

Section: Discussionsupporting

confidence: 66%

Impacts of Potassium Permanganate and Powdered Activated Carbon on Cyanotoxin Release

2018

View full text Add to dashboard Cite

Bench-scale trials were performed to (1) expose Microcystis aeruginosa cells to potassium permanganate (KMnO 4 ) doses of 1, 3, and 5 mg/L at contact times (CTs) of 15, 30, and 90 min, pH levels of 7 and 9, and turbidities of 0.1, 5, and 20 ntu, respectively;(2) compare the impacts of oxidation alone and oxidation plus powdered activated carbon (PAC) for the final 60 min of CT; and (3) evaluate the impact of these treatment conditions on extracellular microcystins (MCs), extra-plus intracellular (combined) MCs, cell membrane integrity, and chlorophyll a concentrations. Toxin releases from the cells were observed at both pH levels. The greatest toxin releases were observed at the lowest KMnO 4 doses. The toxin releases were accompanied by relatively stable total cell counts, increases in membrane-compromised cells, and decreases in chlorophyll a. The application of 10 mg/L PAC resulted in extracellular toxin concentrations that were markedly lower than those observed in oxidant-only situations.

show abstract

Section: Discussionsupporting

confidence: 66%

Impacts of Potassium Permanganate and Powdered Activated Carbon on Cyanotoxin Release

2018

View full text Add to dashboard Cite

show abstract

“…By plotting the data of water uptake during 24 h according to the second-order kinetics (Li et al, 2014), linear relationship was obtained with linear correlation coefficients over 0.99 for both systems. The equilibrium water-uptakes after 24 h were approximately 52.5% and 45.1% for GMO-DOXY matrix and GMO-MLX matrix, respectively.…”

Section: In Vitro Release Behavior and Mechanismmentioning

confidence: 97%

Smart phase transformation system based on lyotropic liquid crystalline@hard capsules for sustained release of hydrophilic and hydrophobic drugs

Zhang

Xiao²,

Huang

et al. 2020

Drug Delivery

View full text Add to dashboard Cite

Smart phase transformation systems@hard capsule (SPTS@hard capsule) based on lyotropic liquid crystalline (LLC) were developed for oral sustained release in this study. Doxycycline hydrochloride (DOXY) and meloxicam (MLX) were used as hydrophilic and hydrophobic model drug, respectively. Two systems were added with different additives, that is, gelucire 39/01, PEG 1000 and Tween 80 to adjust their melting point and release profiles. The phase transformation of these systems could be triggered by water as well as temperature. They could spontaneously transform into cubic phase or hexagonal phase when coming across with water, to achieve the 24 h sustained release profile. In addition, the obtained systems could switch between semisolid state and liquid state when temperature changed within room temperature and body temperature, which facilitated the phase transformation in gastrointestinal tract and during their encapsulation into hard capsules. LLC-based SPTS@hard capsule revealed potential for the industrialization of its oral administration on account of its drugs accommodation with different solubility, controllable release profile and simple preparation process.

show abstract

“…Many algaecidal and/or cyanocidal compounds are not applicable in lakes due to lack of effectiveness or ecosafety. For example, chlorine (Daly et al 2007;Zamyadi et al 2013), potassium permanganate (Li et al 2014), and ozone (Coral et al 2013;Zamyadi et al 2015) are effective in decaying cyanotoxins and the membrane integrity of cyanobacterial cells ). These are not applicable in lakes due to the adverse effects on other aquatic organisms.…”

Section: Chemicalmentioning

confidence: 99%

How to combat cyanobacterial blooms: strategy toward preventive lake restoration and reactive control measures

Stroom

Kardinaal

2016

Aquat Ecol

View full text Add to dashboard Cite

Water managers worldwide are facing the serious problem of dense blooms of cyanobacteria in surface waters. In the quest for the optimal method to combat cyanobacterial dominance, many questions and many possible solutions arise. This paper presents a three-phase strategy to fight harmful cyanobacterial proliferation. Water managers who apply this strategy can generate a tailor-made set of measures. The three phases consist of (1) defining the ecological water quality targets of the waterbody in question, (2) assessing its current ecological state, and (3) selecting which measures will yield optimal results. The paper provides assistance in the quantitative diagnosis of the state of both shallow and deep temperate freshwater lakes by means of a lake system analysis, and presents a survey of measures. Measures are divided into two sets. Preventive measures are based on switching to a clear state (shallow lake) or reducing the overall cyanobacterial biomass (deep lake). They are subdivided into nutrient reduction, hydromorphological adjustments, and food web management. Concerning nutrient reduction, in many situations phosphorus management alone should suffice. Nitrogen management can be important to increase the species diversity of macrophytes, or to relieve downstream (marine) consequences. Control measures (including mitigation) have a direct impact on cyanobacterial blooms by biomass removal, flushing, or mixing; however, the number of proven technologies is limited.

show abstract

Kinetics of Cell Inactivation, Toxin Release, and Degradation during Permanganation of Microcystis aeruginosa

Cited by 90 publications

References 34 publications

Impacts of Potassium Permanganate and Powdered Activated Carbon on Cyanotoxin Release

Impacts of Potassium Permanganate and Powdered Activated Carbon on Cyanotoxin Release

Smart phase transformation system based on lyotropic liquid crystalline@hard capsules for sustained release of hydrophilic and hydrophobic drugs

How to combat cyanobacterial blooms: strategy toward preventive lake restoration and reactive control measures

Contact Info

Product

Resources

About