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Recent developments on gas–solid heterogeneous oxidation removal of elemental mercury from flue gas
Springer Science and Business Media LLC - Tập 17 - Trang 19-47 - 2018
Mercury is a toxic and persistent environmental pollutant which has been recognized as a global threat to human health and our ecosystem because mercury bio-accumulates in the food chain and can be transformed into the more neurotoxic methylmercury. Among current and emerging abatement technologies for elemental mercury in flue gas, gas–solid heterogeneous oxidation is nowadays gaining increasing ......
Nanocarriers for drug delivery applications
Springer Science and Business Media LLC - Tập 17 - Trang 849-865 - 2018
Nanobiotechnology research has recently provided numerous basic and applied advances in the health sector. Nanocarriers have been developed for efficient drug delivery and diagnostic tools. Nanocarrier enables an effective, targeted biomolecular interaction in order to lower side effects caused during the treatment. Here, we review the problems associated with the conventional drug development and......
Unflushable or missing toilet paper, the dilemma for developing communities during the COVID-19 episode
Springer Science and Business Media LLC - Tập 19 - Trang 711-717 - 2020
Unlike in developed countries, most public toilets in China do not provide toilet paper onsite and users must bring their toilet paper. Moreover, an open waste bin is placed in each user’s cubicle to collect used toilet paper and tissues. Such practices, which are common in East Asia and central America, have induced a dilemma of toilet paper disposal because some municipalities have removed waste......
Novel degradation products of the herbicide oxasulfuron identified by capillary electrophoresis – mass spectrometry
Springer Science and Business Media LLC - Tập 4 - Trang 225-228 - 2006
Two new intermediates rising from the photolytic reaction of the sulfonylurea herbicide oxasulfuron have been identified in aqueous environment. The higher concentrations of the two derivatives oxetan-3-yl 2-(formilsulfamoyl) benzoate and N-(4,6-dimethyl-pyrimidin-2-yl) formamide were reached within 8 h of UV-irradiation. Here we demonstrate that an optimal separation and analysis of such compound......
Analysis and removal of pharmaceutical residues from wastewater using membrane bioreactors: a review
Springer Science and Business Media LLC - Tập 19 - Trang 329-343 - 2020
Pharmaceutical compounds such antibiotics, anti-inflammatories, psychotropics, human drugs, hormones, anticonvulsants, antidepressants, veterinary drugs and steroids occur widely in wastewater and drinking water. This pollution by active compounds and their metabolites is expected to increase with rising global population. Therefore, advanced monitoring and remediation techniques are needed. Here ......
Microwave-assisted dry reforming of methane for syngas production: a review
Springer Science and Business Media LLC - Tập 18 - Trang 1987-2019 - 2020
Abatement of emissions of greenhouse gases such as methane and carbon dioxide is crucial to reduce global warming. For that, dry reforming of methane allows to convert methane and carbon dioxide into useful synthesis gas, named ‘syngas’, a gas mixture rich in hydrogen and carbon monoxide. However, this process requires high temperatures of about 900 °C to activate methane and carbon dioxide becaus......
Safe use of Cry genes in genetically modified crops
Springer Science and Business Media LLC - Tập 13 - Trang 239-249 - 2015
Genomic technologies have been used to improve cultivated crop species. For example, Bt genes such as Cry1Ac, Cry2Ab, Cry1F and Cry3Bb1 are derived from Bacillus thuringiensis, a soil bacterium. Such genes provide protection against lepidopteran insect pests. Bt genes have been introduced in corn, cotton, soybean, rice, potato and canola. Genetically modified (GM)-cotton, containing the Cry1Ac gen......
Green synthesis of symmetrical N, N′-disubstituted thiourea derivatives in water using solar energy
Springer Science and Business Media LLC - Tập 11 - Trang 177-182 - 2013
Thioureas are of importance in medicinal chemistry due to their biological activities such as antituberculosis, anti-HIV, analgesic, anti-inflammatory, antimicrobial, antiarrhythmic, fungicide, herbicides, rodenticides and as phenoloxidase enzymatic inhibitors. Treatment of primary and secondary amines with thiophosgene is the common method of making symmetrical disubstituted thioureas. However, t......
Nanoemulsions for health, food, and cosmetics: a review
Springer Science and Business Media LLC - Tập 19 - Trang 3381-3395 - 2021
Nanoemulsions are gaining importance in healthcare and cosmetics sectors as a result of the unique properties of nanosized droplets, such as high surface area. Here we review nanotechnology and nanoemulsions with focus on emulsifiers and nanoemulsifiers, and applications for drugs and vaccines delivery, cancer therapy, inflammation treatment, cosmetics, perfumes, polymers, and food. We discuss nan......
Degradation of the herbicide imazapyr by Fenton reactions
Springer Science and Business Media LLC - Tập 2 - Trang 31-33 - 2004
The degradation of the herbicide imazapyr has been carried out by three advanced oxidation processes involving iron ions as catalysts: Fenton’s reagent, photo-Fenton and electro-Fenton. We show that all processes are rapid and efficient. The kinetic rate constant was found to be
k=5.4×109 M−1
s−1. The mineralization of imazapyr is almost complete using the photo-Fenton and electro-Fenton processes......
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