Using hexadecyl trimethyl ammonium bromide (CTAB) modified clays to clean the Microcystis aeruginosa blooms in Lake Taihu, China

Harmful Algae ◽  
2010 ◽  
Vol 9 (4) ◽  
pp. 413-418 ◽  
Author(s):  
Guofeng Liu ◽  
Chengxin Fan ◽  
Jicheng Zhong ◽  
Lu Zhang ◽  
Shiming Ding ◽  
...  
Keyword(s):  
Microcystis Aeruginosa ◽  
Lake Taihu ◽  
Ammonium Bromide ◽  
Modified Clays ◽  
Hexadecyl Trimethyl Ammonium Bromide

scholarly journals Feedback Regulation between Aquatic Microorganisms and the Bloom-Forming Cyanobacterium Microcystis aeruginosa

2019 ◽  
Vol 85 (21) ◽  
Author(s):  
Meng Zhang ◽  
Tao Lu ◽  
Hans W. Paerl ◽  
Yiling Chen ◽  
Zhenyan Zhang ◽  
...  
Keyword(s):  
Energy Metabolism ◽  
Microcystis Aeruginosa ◽  
Lake Taihu ◽  
Inorganic Nitrogen ◽  
Microbial Community Composition ◽  
Nitrogen And Phosphorus ◽  
Content Type ◽  
Coculture System ◽  
Eukaryotic Microorganisms ◽  
Aquatic Microorganisms

ABSTRACT The frequency and intensity of cyanobacterial blooms are increasing worldwide. Interactions between toxic cyanobacteria and aquatic microorganisms need to be critically evaluated to understand microbial drivers and modulators of the blooms. In this study, we applied 16S/18S rRNA gene sequencing and metabolomics analyses to measure the microbial community composition and metabolic responses of the cyanobacterium Microcystis aeruginosa in a coculture system receiving dissolved inorganic nitrogen and phosphorus (DIP) close to representative concentrations in Lake Taihu, China. M. aeruginosa secreted alkaline phosphatase using a DIP source produced by moribund and decaying microorganisms when the P source was insufficient. During this process, M. aeruginosa accumulated several intermediates in energy metabolism pathways to provide energy for sustained high growth rates and increased intracellular sugars to enhance its competitive capacity and ability to defend itself against microbial attack. It also produced a variety of toxic substances, including microcystins, to inhibit metabolite formation via energy metabolism pathways of aquatic microorganisms, leading to a negative effect on bacterial and eukaryotic microbial richness and diversity. Overall, compared with the monoculture system, the growth of M. aeruginosa was accelerated in coculture, while the growth of some cooccurring microorganisms was inhibited, with the diversity and richness of eukaryotic microorganisms being more negatively impacted than those of prokaryotic microorganisms. These findings provide valuable information for clarifying how M. aeruginosa can potentially modulate its associations with other microorganisms, with ramifications for its dominance in aquatic ecosystems. IMPORTANCE We measured the microbial community composition and metabolic responses of Microcystis aeruginosa in a microcosm coculture system receiving dissolved inorganic nitrogen and phosphorus (DIP) close to the average concentrations in Lake Taihu. In the coculture system, DIP is depleted and the growth and production of aquatic microorganisms can be stressed by a lack of DIP availability. M. aeruginosa could accelerate its growth via interactions with specific cooccurring microorganisms and the accumulation of several intermediates in energy metabolism-related pathways. Furthermore, M. aeruginosa can decrease the carbohydrate metabolism of cooccurring aquatic microorganisms and thus disrupt microbial activities in the coculture. This also had a negative effect on bacterial and eukaryotic microbial richness and diversity. Microcystin was capable of decreasing the biomass of total phytoplankton in aquatic microcosms. Overall, compared to the monoculture, the growth of total aquatic microorganisms is inhibited, with the diversity and richness of eukaryotic microorganisms being more negatively impacted than those of prokaryotic microorganisms. The only exception is M. aeruginosa in the coculture system, whose growth was accelerated.

scholarly journals Ion-Selective Electrode for Anionic Surfactants Using Hexadecyl Trimethyl Ammonium Bromide-Sodium Dodecylsulfate as an Active Ionophore

2011 ◽  
Vol 2011 ◽  
pp. 1-7 ◽  
Author(s):  
Junwei Wang ◽  
Zhiping Du ◽  
Wanxu Wang ◽  
Wei Xue
Keyword(s):  
Limit Of Detection ◽  
Sodium Dodecylsulfate ◽  
Poor Response ◽  
Pvc Membrane ◽  
Indicator Electrode ◽  
Membrane Electrode ◽  
Ammonium Bromide ◽  
Hexadecyl Trimethyl Ammonium Bromide ◽  
Pvc Membrane Electrode ◽  
Wide Ph Range

The construction and characteristic performance of PVC membrane electrode responsive to sodium dodecylsulfate (SDS) are described in this paper. The electrode is based on hexadecyl trimethyl ammonium bromide-Sodium dodecylsulfate (CTA+DS−) ion pair as ionophore in PVC membrane, which displays a Nernstian slope of −58 ± 0.9 mV/decade in a 5.0 × 10−6to 2.5 × 10−3 mol L−1concentration range and a limit of detection of 2.9 × 10−6 mol L−1. The electrode can be used for 3 months without showing significant changes in the value of slope or working range. Also the electrode has wide pH range of application and short response time. The electrode shows a selective response to SDS and a poor response to common inorganic anions. The selective sequence found was SDS > HCO3 −> CH3COO−> Cl−> I−> NO3 −≈Br−> F−> CO3 2−> C6H5O7 3−> C2O4 2−> SO4 2−> C4H4O6 2−> SO3 2−> PO4 3−. The potentiometric selectivity coefficients determined are indicating that common anions would not interfere in the SDS determination. The electrode has been utilized as an end point indicator electrode for potentiometric titration involving hyamine as titrant.

Molecular Dynamics Simulation of Ice Crystal Growth Inhibition by Hexadecyl-trimethyl-ammonium Bromide

Langmuir ◽  
2018 ◽  
Vol 34 (31) ◽  
pp. 9330-9335
Author(s):  
Naoya Shimazu ◽  
Daisuke Takaiwa ◽  
Donguk Suh ◽  
Touru Kawaguchi ◽  
Takuya Fuse ◽  
...  
Keyword(s):  
Molecular Dynamics ◽  
Crystal Growth ◽  
Molecular Dynamics Simulation ◽  
Growth Inhibition ◽  
Dynamics Simulation ◽  
Ammonium Bromide ◽  
Ice Crystal ◽  
Hexadecyl Trimethyl Ammonium Bromide ◽  
Crystal Growth Inhibition

scholarly journals Degradation Characteristics of Phosphorus in Phytoplankton-Derived Particulate Organic Matter and Its Effects on the Growth of Phosphorus-Deficient Microcystis aeruginosa in Lake Taihu

2019 ◽  
Vol 16 (12) ◽  
pp. 2155 ◽  
Author(s):  
Ming Kong ◽  
Jianying Chao ◽  
Wei Han ◽  
Chun Ye ◽  
Chun-Hua Li ◽  
...  
Keyword(s):  
Organic Matter ◽  
Microcystis Aeruginosa ◽  
Particulate Organic Matter ◽  
Lake Taihu ◽  
Degradation Mechanism ◽  
Eutrophication Control ◽  
Cyanobacteria Blooms ◽  
P Release ◽  
Early Degradation ◽  
Total P

To illustrate the contribution of phytoplankton-derived particulate organic matter (PPOM) to endogenous phosphorus (P) cycling and its effects on cyanobacteria blooms, PPOM characteristics, the degradation mechanism, and the growth of P-deficient Microcystis aeruginosa were studied in Lake Taihu. Results showed that PPOM is the most important P pool in the water column during cyanobacteria bloom, accounting for more than 80% of the total P (TP) in the water. During PPOM degradation, the particulate orthophosphate (Ortho-P) is the main species of P release from PPOM in the early degradation stage. The variations of polyphosphate (Poly-P) and phosphodiesters (Diester-P) contents were most significant, which were degraded completely within four days and eight days. Cell density and growth rate of M. aeruginosa using PPOM as P source were similar to those growing on Na2HPO4. The above results show that P in PPOM can be converted into available P by degradation, thus promoting the growth of M. aeruginosa. Therefore, the contribution of P release from PPOM degradation needs to be paid attention to in lake eutrophication control in the future.

Inhibition of corrosion by hexadecyl trimethyl ammonium bromide Langmuir-Blodgett monolayers on carbon steel

1994 ◽  
Vol 243 (1-2) ◽  
pp. 540-543 ◽  
Author(s):  
Du Guo ◽  
Wei Xing ◽  
Yi-Bin Shan ◽  
Tian-Hong Lu ◽  
Shi-Quan Xi
Keyword(s):  
Carbon Steel ◽  
Ammonium Bromide ◽  
Langmuir Blodgett ◽  
Hexadecyl Trimethyl Ammonium Bromide
Sign in / Sign up

Export Citation Format

Share Document