Carbon Dioxide: A Waste Product in the Catalytic Cycle of α-Ketoglutarate Dependent Halogenases Prevents the Formation of Hydroxylated By-Products

2009 ◽  
Vol 113 (1) ◽  
pp. 12-14 ◽  
Author(s):  
Sam P. de Visser ◽  
Reza Latifi
Keyword(s):  
Carbon Dioxide ◽  
Waste Product ◽  
Catalytic Cycle ◽  
By Products

Deactivation of Red Mud by Primary Aluminum Production Wastes

2021 ◽  
Vol 1040 ◽  
pp. 109-116
Author(s):  
V.Yu. Piirainen ◽  
A.A. Barinkova ◽  
V.N. Starovoytov ◽  
V.M. Barinkov
Keyword(s):  
Carbon Dioxide ◽  
Red Mud ◽  
Negative Impact ◽  
Waste Product ◽  
Primary Aluminum ◽  
Raw Material ◽  
Aluminum Production ◽  
Environmentally Safe ◽  
Primary Aluminum Production ◽  
Knowledge Intensive

Current global environmental challenges and, above all, global warming associated with a change in the carbon balance in the atmosphere has led to the need for urgent and rapid search for ways to reduce greenhouse gas emissions into the atmosphere, which primarily include carbon dioxide as a by-product of human activity and technological progress. One of these ways is the creation of industries with a complete cycle of turnover of carbon dioxide. Aluminum is the most sought-after nonferrous metal in the world, but its production is not environmentally safe, so it constantly requires the development of knowledge-intensive technologies to improve the technological process of cleaning and disposal of production waste, primarily harmful emissions into the atmosphere. Another environmental problem related to aluminum production is the formation and accumulation in mud lagoon of huge amounts of so-called highly alkaline "red mud," which is a waste product of natural bauxite raw material processing into alumina - the feedstock for aluminum production. Commonly known resources and technological methods of neutralizing red mud and working with it as ore materials for further extraction of useful components are still not used because of their low productivity and cost-effectiveness. This article describes the negative impact of waste in the form of "red" mud and carbon dioxide of primary aluminum production on the environment. The results showed that thanks to carbonization of red mud using carbon dioxide, it is possible to achieve rapid curing and its compact formation for safer transportation and storage until further use. Strength tests of concrete samples filled with deactivated red mud were also carried out, which showed the prospects of using concrete with magnesia binder.

Performance of Moringa oliefera as a biosorbent for chromium removal

2010 ◽  
Vol 62 (5) ◽  
pp. 1106-1111 ◽  
Author(s):  
K. Ghebremichael ◽  
N. Gebremedhin ◽  
G. Amy
Keyword(s):  
Waste Product ◽  
Chromium Concentration ◽  
Seed Processing ◽  
Metals Removal ◽  
Wastewater Systems ◽  
Seed Husk ◽  
Whole Seed ◽  
By Products ◽  
Moringa Oleifera Seed ◽  
Maximum Removal

This study investigated adsorption of chromium on to a bio-adsorbent, Moringa oleifera seed. Different by-products of the seed processing were used as adsorbents. These include: the Whole Seed Powder (WSP), the Residue after Coagulant Extraction (RaCE) and an Activated Carbon (AC) prepared from the seed husk. Adsorption studies for the removal of Cr(III) and Cr(VI) were carried out in batch experiments and the effects of adsorbent dosage, contact time, pH and initial chromium concentration were analysed. Experimental results showed that maximum removal of Cr(III) and Cr(VI) was observed at pH 7 and pH 2, respectively. The percentage removals of Cr(III) by WSP, RaCE and AC were: 97, 94 and 99.9%, respectively. And the percentage removals of Cr(VI) by RaCE and AC were 47 and 83.2%, respectively. RaCE showed similar adsorption capacity to the WSP, which indicates that it is possible to extract a coagulant and use the waste product for adsorption. By using the RaCE, residual dissolved organic carbon in the treated water was significantly reduced compared to using the WSP. These results indicate that biomaterials can be considered as potential adsorbents for heavy metals removal from water or wastewater systems.

scholarly journals Decomposition Characteristics of Benzene, Toluene and Xylene in an Atmospheric Pressure DC Corona Discharge II. Characteristics of Deposited By-products and Decomposition Process

2016 ◽  
Vol 19 (1) ◽  
Author(s):  
Seiji Sakai ◽  
Kazuhiro Takahashi ◽  
Kohki Satoh ◽  
Hidenori Itoh
Keyword(s):  
Mass Spectrometry ◽  
Carbon Dioxide ◽  
Corona Discharge ◽  
Atmospheric Pressure ◽  
Infrared Absorption Spectroscopy ◽  
Gas Chromatograph ◽  
Decomposition Processes ◽  
Benzene Toluene ◽  
Gas Chromatograph Mass Spectrometry ◽  
By Products

AbstractGaseous by-products and deposited material obtained from the decomposition of benzene, toluene and xylene in an atmospheric pressure DC corona discharge were minutely investigated by gas chromatograph mass spectrometry and infrared absorption spectroscopy, and the decomposition processes of benzene, toluene and xylene were estimated. It was found that carbon dioxide (CO

scholarly journals Carbon dioxide uptakes by acetylene by-products through gas–solid and gas–solid–liquid reactions

2021 ◽  
Vol 7 ◽  
pp. 193-198
Author(s):  
Maisa El Gamal ◽  
Ameera Mohammad ◽  
Suhaib Hameedi ◽  
Hadeel AlZawahreh
Keyword(s):  
Carbon Dioxide ◽  
Solid Liquid ◽  
By Products

scholarly journals Hemp is the Future of Plastics

2018 ◽  
Vol 51 ◽  
pp. 03002
Author(s):  
Ali Asghar Modi ◽  
Rehmatullah Shahid ◽  
Muhammad Usman Saeed ◽  
Tanzila Younas
Keyword(s):  
Carbon Dioxide ◽  
Infinite Number ◽  
Biodegradable Plastic ◽  
The Future ◽  
Greenhouse Impact ◽  
By Products ◽  
Land Water

Plastic is the world's most adaptable material. From bikes to food wraps and from jets to pencils, you can make anything and everything from plastics. With the infinite number of uses, plastic also have some devastating impacts on our planet. Most plastics produced today are made using petroleum-based compounds that release harmful gases into the atmosphere. Waste solutions are inefficient, and harmful by-products toxic our land, water and wildlife. Yet, consider the possibility that there was a way to deal with deliver the greater part of what we utilize causes a negative greenhouse impact, is sustainable and biodegradable and has just about an indistinguishable cost to our present techniques. Meet Hemp plastic, an only plastic that's 100% biodegradable in nature if produce by using only Hemp plant. Hemp plant consumes 4 times more carbon dioxide then other plants from atmosphere. The fiber we can produce from hemp is stronger than the conventional fiber we are using these days. This paper is intended to show numerous benefits of using hemp for the manufacturing of biodegradable plastic (HEMP PLASTIC) rather than conventional plastics.

scholarly journals Selective extraction of phospholipids from food by-products by supercritical carbon dioxide and ethanol and formulating ability of extracts

2020 ◽  
Vol 238 ◽  
pp. 116394
Author(s):  
Raphaelle Savoire ◽  
Pascale Subra-Paternault ◽  
Tiphaine Bardeau ◽  
Estelle Morvan ◽  
Axelle Grélard ◽  
...  
Keyword(s):  
Carbon Dioxide ◽  
Supercritical Carbon Dioxide ◽  
Selective Extraction ◽  
By Products ◽  
Supercritical Carbon
Sign in / Sign up

Export Citation Format

Share Document