Extended Exergy Accounting analysis of IGCC process – Determination of environmental remediation cost of refinery and coke processing waste

2016 ◽  
Vol 119 ◽  
pp. 178-186 ◽  
Author(s):  
Candeniz Seckin
Keyword(s):  
Environmental Remediation ◽  
Processing Waste

scholarly journals Enhanced Photocatalytic Degradation of the Imidazolinone Herbicide Imazapyr upon UV/Vis Irradiation in the Presence of CaxMnOy-TiO2 Hetero-Nanostructures: Degradation Pathways and Reaction Intermediates

Nanomaterials ◽  
2020 ◽  
Vol 10 (5) ◽  
pp. 896 ◽  
Author(s):  
Salma Bougarrani ◽  
Preetam K. Sharma ◽  
Jeremy W. J. Hamilton ◽  
Anukriti Singh ◽  
Moisés Canle ◽  
...  
Keyword(s):  
Photocatalytic Degradation ◽  
Environmental Remediation ◽  
Irradiation Time ◽  
Radical Scavenger ◽  
Degradation Pathways ◽  
Reaction Intermediates ◽  
Mechanical Grinding ◽  
Polar Species

The determination of reaction pathways and identification of products of pollutants degradation is central to photocatalytic environmental remediation. This work focuses on the photocatalytic degradation of the herbicide Imazapyr (2-(4-methyl-5-oxo-4-propan-2-yl-1H-imidazol-2-yl) pyridine-3-carboxylic acid) under UV-Vis and visible-only irradiation of aqueous suspensions of CaxMnOy-TiO2, and on the identification of the corresponding degradation pathways and reaction intermediates. CaxMnOy-TiO2 was formed by mixing CaxMnOy and TiO2 by mechanical grinding followed by annealing at 500 °C. A complete structural characterization of CaxMnOy-TiO2 was carried out. The photocatalytic activity of the hetero-nanostructures was determined using phenol and Imazapyr herbicide as model pollutants in a stirred tank reactor under UV-Vis and visible-only irradiation. Using equivalent loadings, CaxMnOy-TiO2 showed a higher rate (10.6 μM·h−1) as compared to unmodified TiO2 (7.4 μM·h−1) for Imazapyr degradation under UV-Vis irradiation. The mineralization rate was 4.07 µM·h−1 for CaxMnOy-TiO2 and 1.21 μM·h−1 for TiO2. In the CaxMnOy-TiO2 system, the concentration of intermediate products reached a maximum at 180 min of irradiation that then decreased to a half in 120 min. For unmodified TiO2, the intermediates continuously increased with irradiation time with no decrease observed in their concentration. The enhanced efficiency of the CaxMnOy-TiO2 for the complete degradation of the Imazapyr and intermediates is attributed to an increased adsorption of polar species on the surface of CaxMnOy. Based on LC-MS, photocatalytic degradation pathways for Imazapyr under UV-Vis irradiation have been proposed. Some photocatalytic degradation was obtained under visible-only irradiation for CaxMnOy-TiO2. Hydroxyl radicals were found to be main reactive oxygen species responsible for the photocatalytic degradation through radical scavenger investigations.

scholarly journals Analytical hierarchy process in determining the location of the cascara industry in Aceh Tengah District

2022 ◽  
Vol 951 (1) ◽  
pp. 012086
Author(s):  
N H Zuhra ◽  
Yusriana ◽  
M Muzaifa
Keyword(s):  
Analytical Hierarchy Process ◽  
Planning Process ◽  
New Product ◽  
Raw Material ◽  
Processing Waste ◽  
Industry Location ◽  
Alternative Location ◽  
The Right ◽  
Hierarchy Process

Abstract Choosing the right industry location is an important thing in the business planning process. Cascara industry is one of activity that produces a new product of coffee tree such as a pulp coffee berry. This Industry has the potential to be developed. Processing waste pulp coffee cascara products such as cascara tea is expected to add higher value to pulp coffee. Building the new cascara industry in Aceh Tengah District needs a good strategy to choose the right location for the industry. One method that can be used to analyse this aspect is the method Analytical Hierarchy Process (AHP). Determination of the location of the cascara industry in Aceh Tengah District uses several criteria, namely the potential for cascara production, human resources, transportation access, and infrastructure availability. While the alternative locations chosen for the establishments of the cascara industry are Bebesen Sub district, Kebayakan Sub district, and Pegasing Sub district. According to the result of research, the best alternative location of raw material and infrastructure availability for the establishment of the cascara industry is Pegasing Sub districts with the weight of around 0.399.

Gas chromatographic determination of organic components in effluents from mills for processing waste paper

1986 ◽  
Vol 364 ◽  
pp. 339-344 ◽  
Author(s):  
O.I. Kalchenko ◽  
V.O. Volovenko ◽  
K.I. Sakodynskii ◽  
V.P. Svitelskii
Keyword(s):  
Chromatographic Determination ◽  
Waste Paper ◽  
Processing Waste ◽  
Organic Components
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