Removal of 2,4 dichlorophenol using microwave assisted nanoscale zero-valent copper activated persulfate from aqueous solutions: Mineralization, kinetics, and degradation pathways

2019 ◽  
Vol 296 ◽  
pp. 111873 ◽  
Author(s):  
Zainab Ghorbanian ◽  
Ghorban Asgari ◽  
Mohammad Taghi Samadi ◽  
Abdolmotaleb Seid-mohammadi
Keyword(s):  
Aqueous Solutions ◽  
Degradation Pathways ◽  
Microwave Assisted ◽  
Mineralization Kinetics ◽  
Activated Persulfate

Microwave synthesis of a CoSe2/graphene–TiO2 heterostructure for improved hydrogen evolution from aqueous solutions in the presence of sacrificial agents

RSC Advances ◽  
2015 ◽  
Vol 5 (24) ◽  
pp. 18841-18849 ◽  
Author(s):  
Kefayat Ullah ◽  
Zhu Lei ◽  
Shu Ye ◽  
Asghar Ali ◽  
Won-Chun Oh
Keyword(s):  
Aqueous Solutions ◽  
Hydrogen Evolution ◽  
Microwave Synthesis ◽  
High Performance ◽  
Heterogeneous Material ◽  
Microwave Assisted ◽  
Tube Type

A heterogeneous material consisting of a tube type TiO2 was grown in the presence of a CoSe2/graphene hybrid, as a high-performance photocatalyst material, through a fast microwave-assisted technique.

scholarly journals Photo-transformation of aqueous nitroguanidine and 3-nitro-1,2,4-triazol-5-one : emerging munitions compounds

2021 ◽  
Author(s):  
Julie Becher ◽  
Samuel Beal ◽  
Susan Taylor ◽  
Katerina Dontsova ◽  
Dean Wilcox
Keyword(s):  
Aqueous Solutions ◽  
Degradation Products ◽  
Pure Water ◽  
Transformation Products ◽  
Water Soluble ◽  
Uv Exposure ◽  
Degradation Pathways ◽  
Solution Ph ◽  
Photo Degradation ◽  
Degradation Rates

Two major components of insensitive munition formulations, nitroguanidine (NQ) and 3-nitro-1,2,4-triazol-5-one (NTO), are highly water soluble and therefore likely to photo-transform while in solution in the environment. The ecotoxicities of NQ and NTO solutions are known to increase with UV exposure, but a detailed accounting of aqueous degradation rates, products, and pathways under different exposure wavelengths is currently lacking. We irradiated aqueous solutions of NQ and NTO over a 32-h period at three ultraviolet wavelengths and analyzed their degradation rates and transformation products. NQ was completely degraded by 30 min at 254 nm and by 4 h at 300 nm, but it was only 10% degraded after 32 h at 350 nm. Mass recoveries of NQ and its transformation products were >80% for all three wavelengths. NTO degradation was greatest at 300 nm with 3% remaining after 32 h, followed by 254 nm (7% remaining) and 350 nm (20% remaining). Mass recoveries of NTO and its transformation products were high for the first 8 h but decreased to 22–48% by 32 h. Environmental half-lives of NQ and NTO in pure water were estimated as 4 and 6 days, respectively. We propose photo-degradation pathways for NQ and NTO supported by observed and quantified degradation products and changes in solution pH.

Fluorescence sensing of mercury(ii) and melamine in aqueous solutions through microwave-assisted synthesis of egg-white-protected gold nanoclusters

2018 ◽  
Vol 10 (14) ◽  
pp. 1624-1632 ◽  
Author(s):  
Ying-Chiao Lin ◽  
Tsunghsueh Wu ◽  
Yang-Wei Lin
Keyword(s):  
Aqueous Solutions ◽  
Gold Nanoclusters ◽  
Egg White ◽  
Microwave Assisted Synthesis ◽  
Fluorescence Sensing ◽  
Microwave Assisted ◽  
Turn On

Microwave-assisted synthesis of fluorescent egg-white-protected gold nanoclusters for turn-off sensing of Hg(ii) and turn-on sensing of melamine.

Oxidative degradation of atenolol by heat-activated persulfate: Kinetics, degradation pathways and distribution of transformation intermediates

Chemosphere ◽  
2018 ◽  
Vol 207 ◽  
pp. 174-182 ◽  
Author(s):  
Dong Miao ◽  
Jianbiao Peng ◽  
Xiaohuan Zhou ◽  
Li Qian ◽  
Mengjie Wang ◽  
...  
Keyword(s):  
Oxidative Degradation ◽  
Degradation Pathways ◽  
Activated Persulfate

scholarly journals Persulfate activation by nano zero-valent iron for the degradation of metoprolol in water: influencing factors, degradation pathways and toxicity analysis

RSC Advances ◽  
2020 ◽  
Vol 10 (35) ◽  
pp. 20991-20999
Author(s):  
Yu-qiong Gao ◽  
Jia Zhang ◽  
Jin-qiang Zhou ◽  
Cong Li ◽  
Nai-yun Gao ◽  
...  
Keyword(s):  
Influencing Factors ◽  
Zero Valent Iron ◽  
Degradation Pathways ◽  
Toxicity Analysis ◽  
Nano Zero Valent Iron ◽  
Persulfate Activation ◽  
Activated Persulfate

The influencing factors, mechanism and toxicity of MTP degradation by nZVI activated persulfate were investigated.

Microwave-assisted Fe0-activated persulfate process for treating explosives in production wastewater

2020 ◽  
Vol 391 ◽  
pp. 123497 ◽  
Author(s):  
Weiming Chen ◽  
Zhepei Gu ◽  
Shengpeng Guo ◽  
Qibin Li
Keyword(s):  
Microwave Assisted ◽  
Activated Persulfate

scholarly journals Microwave-assisted synthesis of calcium phosphate nanowhiskers

2004 ◽  
Vol 19 (6) ◽  
pp. 1876-1881 ◽  
Author(s):  
Sahil Jalota ◽  
A. Cuneyt Tas ◽  
Sarit B. Bhaduri
Keyword(s):  
Calcium Phosphate ◽  
Aqueous Solutions ◽  
Tricalcium Phosphate ◽  
Room Temperature ◽  
Single Phase ◽  
Microwave Oven ◽  
Molten Salt Synthesis ◽  
Microwave Assisted Synthesis ◽  
Microwave Assisted ◽  
Auto Ignition

Calcium phosphate [single-phase hydroxyapatite (HA), single-phase tricalcium phosphate (TCP), and biphasic HA-TCP] nanowhiskers and/or powders were produced by using a novel microwave-assisted “combustion synthesis (auto ignition)/molten salt synthesis” hybrid route. This work is an example of our “synergistic processing” philosophy combining these three technologies while taking advantage of their useful aspects. Aqueous solutions containing NaNO3, Ca(NO3)2·4H2O and KH2PO4 (with or without urea) were irradiated in a household microwave oven for 5 min at 600 watts of power. The as-synthesized precursors were then simply stirred in water at room temperature for 1 h to obtain the nanowhiskers or powders of the desired calcium phosphate bioceramics.

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