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You searched for: Journal Environmental chemistry letters Remove constraint Journal: Environmental chemistry letters Publication Year 2018 Remove constraint Publication Year: 2018 Subject catalysts Remove constraint Subject: catalysts
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1. An efficient synthesis of bisenols in water extract of waste onion peel ash

Author:
Chia, Poh Wai; Lim, Ban Soon; Yong, Fu Siong Julius; Poh, Seng-Chee; Kan, Su-Yin
Source:
Environmental chemistry letters 2018 v.16 no.4 pp. 1493-1499
ISSN:
1610-3653
Subject:
4-hydroxycoumarin; benzaldehyde; catalysts; catalytic activity; ethyl acetate; metals; onion peels; toxic substances; wastes
Abstract:
... Bisenols and its derivatives are attractive heterocyclic compounds exhibiting a wide range of biological properties, including anticancer, antipyretic and antimicrobial characteristics. Many catalytic systems have been reported to enhance the synthesis of bisenols, but these catalytic systems suffer from several drawbacks, such as the use of external metals, expensive and toxic chemicals. Thus, th ...
DOI:
10.1007/s10311-018-0764-1

2. Rapid dephosphorylation of glyphosate by Cu-catalyzed sulfite oxidation involving sulfate and hydroxyl radicals

Author:
Chen, Long; Huang, Xingyun; Tang, Min; Zhou, Danna; Wu, Feng
Source:
Environmental chemistry letters 2018 v.16 no.4 pp. 1507-1511
ISSN:
1610-3653
Subject:
catalysts; catalytic activity; copper; dephosphorylation; free radicals; glyphosate; hydroxyl radicals; industrial applications; iron; oxidation; pH; sulfates; sulfites; synergism; toxicity; wastewater treatment
Abstract:
... Glyphosate is a broad-spectrum toxic herbicide that has entered the environment. Advanced oxidation processes efficiently remove various persistent organic contaminants. In particular, generation of sulfate radicals based on catalytic sulfite oxidation is promising, but previously used Fe(II/III) catalysts have reduced activity at pH above 4 due to precipitative deactivation. Therefore, here we te ...
DOI:
10.1007/s10311-018-0767-y

3. Aerobic oxidation of secondary benzyl alcohols catalyzed by phosphinite-based palladium pincer complexes

Author:
Urgoitia, Garazi; Galdón, Garbiñe; Churruca, Fatima; SanMartin, Raul; Herrero, María Teresa; Domínguez, Esther
Source:
Environmental chemistry letters 2018 v.16 no.3 pp. 1101-1108
ISSN:
1610-3653
Subject:
atmospheric pressure; benzyl alcohol; catalysts; filtration; ketones; monitoring; nuclear magnetic resonance spectroscopy; oxidation; oxygen; palladium; polyethylene glycol; solvents
Abstract:
... Aerobic oxidation of organic compounds is receiving attention because molecular oxygen is an abundant, cheap and comparatively safe reagent. Several catalyst systems have been developed so far, but the priority is efficiency and the use of more sustainable reaction media. Here the synthesis of two bis-phosphinite-based palladium(II) complexes has been improved to overcome the lack of reproducibili ...
DOI:
10.1007/s10311-018-0730-y

4. Treatment of organic pollutants by homogeneous and heterogeneous Fenton reaction processes

Author:
Jain, Bhawana; Singh, Ajaya Kumar; Kim, Hyunook; Lichtfouse, Eric; Sharma, Virender K.
Source:
Environmental chemistry letters 2018 v.16 no.3 pp. 947-967
ISSN:
1610-3653
Subject:
antibiotics; catalysts; chemical oxygen demand; cosmetics; dyes; ecosystems; fertilizers; hydrogen peroxide; industrial effluents; industrialization; iron; mineralization; organic carbon; oxidation; pH; paints; phenols; wastewater; water pollution
Abstract:
... Nowadays, the water ecosystem is being polluted due to the rapid industrialization and massive use of antibiotics, fertilizers, cosmetics, paints, and other chemicals. Chemical oxidation is one of the most applied processes to degrade contaminants in water. However, chemicals are often unable to completely mineralize the pollutants. Enhanced pollutant degradation can be achieved by Fenton reaction ...
DOI:
10.1007/s10311-018-0738-3

5. Green chemistry with process intensification for sustainable biodiesel production

Author:
Gude, VeeraGnaneswar; Martinez-Guerra, Edith
Source:
Environmental chemistry letters 2018 v.16 no.2 pp. 327-341
ISSN:
1610-3653
Subject:
activation energy; biodiesel; byproducts; catalysts; energy; feedstocks; fossil fuels; fuel production; green chemistry; oils; pollution; reaction kinetics; solvents; toxic substances; transesterification
Abstract:
... Biodiesel as a renewable fuel has the potential to replace non-renewable fossil fuels and associated environmental pollution. The most commonly used method in biodiesel production is transesterification of virgin and used oil feedstock. However, the chemical reaction (transesterification) does not proceed spontaneously, which means excess reactants are required to move the reaction to completion. ...
DOI:
10.1007/s10311-017-0680-9

6. Spongy Ni/Fe carbonate-fluorapatite catalyst for efficient conversion of cooking oil waste into biodiesel

Author:
Abukhadra, MostafaR.; Dardir, FatmaM.; Shaban, Mohamed; Ahmed, EzzatA.; Soliman, MamdouhF.
Source:
Environmental chemistry letters 2018 v.16 no.2 pp. 665-670
ISSN:
1610-3653
Subject:
ammonia; animals; biodiesel; catalysts; chlorides; cooking fats and oils; filtrates; hydroxyapatite; iron; methanol; nickel; nitric acid; petroleum; phosphorite; transesterification; wastes
Abstract:
... Biodiesel produced from animal and plant fat oils is sustainable, but there is a need for efficient heterogeneous catalysts for transesterification of crude oils into biodiesel. Here, spongy carbonate-fluorapatite loaded with nickel and iron was synthesized and tested for conversion of waste cooking oil into biodiesel. The catalyst was synthesized by dissolution of phosphorite in nitric acid, and ...
DOI:
10.1007/s10311-017-0695-2

7. Supported single-atom catalysts: synthesis, characterization, properties, and applications

Author:
Liu, Jing; Bunes, BenjaminR.; Zang, Ling; Wang, Chuanyi
Source:
Environmental chemistry letters 2018 v.16 no.2 pp. 477-505
ISSN:
1610-3653
Subject:
catalysts; hydrogenation; methanol; oxidation; photocatalysis; steam
Abstract:
... In recent years, there has been a wide research in supported single-atom catalysts (SACs), which contain only isolated individual metal atoms dispersed on an appropriate support or coordinated with the surface atoms of the support. The SACs exhibit many fascinating characteristics including high activity, selectivity, and maximum atomic utilization. These characteristics arise from the low coordin ...
DOI:
10.1007/s10311-017-0679-2

8. The catalytic naphtha reforming process: hydrodesulfurization, catalysts and zeoforming

Author:
Nabgan, Walid; Rashidzadeh, Mehdi; Nabgan, Bahador
Source:
Environmental chemistry letters 2018 v.16 no.2 pp. 507-522
ISSN:
1610-3653
Subject:
catalysts; gasoline; industry; petroleum; sulfur; zeolites
Abstract:
... High-octane gasoline production by catalytic naphtha reforming is a major process in the petroleum industry. Sulfur components involved in the reforming process are causing pollutions and catalyst poisoning. Hydrodesulfurization has been developed to remove sulfur species from naphtha. Bimetallic and trimetallic catalysts are used to improve the naphtha reforming. Another solution to produce gasol ...
DOI:
10.1007/s10311-018-0707-x

9. Ag@MnxOy: an effective catalyst for photo-degradation of rhodamine B dye

Author:
Saeed, Muhammad; Ahmad, Aziz; Boddula, Rajender; Inamuddin,; Haq, Attaul; Azhar, Aisha
Source:
Environmental chemistry letters 2018 v.16 no.1 pp. 287-294
ISSN:
1610-3653
Subject:
Calotropis gigantea; Fourier transform infrared spectroscopy; X-ray diffraction; ammonia; catalysts; dyes; electrons; industrial effluents; irradiation; manganese oxides; photocatalysis; photolysis; plant extracts; potassium permanganate; scanning electron microscopy; silver; silver nitrate; textile industry; water pollution
Abstract:
... Water pollution by the textile industry is a major issue. Therefore, there is a need for methods to remove organic dyes from industrial effluents. Various metal oxides have been used as catalysts for the degradation of dyes. The catalytic efficiency of metal oxides can be enhanced by doping metal oxides with metals. Here we report the synthesis and characterization of nano-sized mixed valence mang ...
DOI:
10.1007/s10311-017-0661-z

10. Fast and complete removal of the 5-fluorouracil drug from water by electro-Fenton oxidation

Author:
Ganzenko, Oleksandra; Oturan, Nihal; Sirés, Ignasi; Huguenot, David; van Hullebusch, EricD.; Esposito, Giovanni; Oturan, MehmetA.
Source:
Environmental chemistry letters 2018 v.16 no.1 pp. 281-286
ISSN:
1610-3653
Subject:
DNA; acetic acids; ammonium; anodes; byproducts; catalysts; cathodes; fluorides; fluorouracil; hydroxyl radicals; inorganic ions; iron; mineralization; nitrates; organic carbon; oxidation; pollutants
Abstract:
... Cytostatic drugs are a troublesome class of emerging pollutants in water owing to their potential effects on DNA. Here we studied the removal of 5-fluorouracil from water using the electro-Fenton process. Galvanostatic electrolyses were performed with an undivided laboratory-scale cell equipped with a boron-doped diamond anode and a carbon felt cathode. Results show that the fastest degradation an ...
DOI:
10.1007/s10311-017-0659-6

11. Microbial fuel cells: enhancement with a polyaniline/carbon felt capacitive bioanode and reduction of Cr(VI) using the intermittent operation

Author:
Wang, Yuyang; Chen, Ye; Wen, Qing
Source:
Environmental chemistry letters 2018 v.16 no.1 pp. 319-326
ISSN:
1610-3653
Subject:
bacteria; bioanodes; carbon; catalysts; cathodes; chromium; electricity; electronic equipment; energy; harvesting; microbial fuel cells; oxidation; polymers; waste management; wastewater
Abstract:
... With the increasing concern for energy sources, waste management, the search for novel technological solutions continues. Microbial fuel cell is a new biotechnology that utilizes bacteria as catalysts to decompose organic substrate and simultaneously harvest electricity. Anodes play an important role in deciding the microbial fuel cell. In this paper, the cumulative charge of the polyaniline-modif ...
DOI:
10.1007/s10311-017-0678-3