Assessing the environmental impact of five Pd-based catalytic technologies in removing of nitrates
Resource
JOURNAL OF HAZARDOUS MATERIALS, 192(2), 837-845
Journal
Journal of Hazardous Materials
Pages
837-845
Date Issued
2011
Date
2011
Author(s)
Abstract
Emerging technologies involving chemical catalytic processes to remove nitrate from water have proven efficient and cost-effective. However, the environmental impact of noble metals and metals at the nanoscale used in these processes has become a topic of serious concern. The aim of this research was to develop a system for evaluating the environmental impact of technologies associated with Pd-based catalytic denitrification. This research performed life cycle assessment (LCA) based on a detailed analysis of the technologies to examine the environmental burden associated with all stages of the removal process. We then applied analytical hierarchy process (AHP) to determine the weights of various burdens. We implemented the proposed system to determine the relative environmental friendliness of 5 processes used for the removal of nitrate. These five methods use Cu-Pd/TNTs, H2+Pd-Cu/TiO2, Pd-Cu/TiO2, Pd/ZnO, and Pd-Cu/FeO as catalysts for the removal of nitrate. The results indicate that the use of palladium and the consumption of electricity have a major environmental impact; while the use of Pd-Cu/TiO2 as catalyst was the most environmentally friendly of the five processes evaluated. © 2011 Elsevier B.V.
Other Subjects
Analytical hierarchy process; Catalytic denitrification; Catalytic process; Catalytic technology; Emerging technologies; Environmental burdens; Environmental friendliness; Environmentally-friendly; Life cycle assessment; Life-cycle assessments; Nano scale; Removal process; Catalysts; Denitrification; Hierarchical systems; Life cycle; Nitrates; Nitrogen removal; Palladium; Precious metals; Rating; Technology; Environmental impact; copper; ferric oxide; nanotube; nitrate; palladium; titanium dioxide; zinc oxide; analytical hierarchy process; catalysis; catalyst; cost-benefit analysis; denitrification; electrical power; environmental impact assessment; life cycle analysis; nitrate; palladium; pollutant removal; water treatment; article; catalysis; catalyst; denitrification; electricity; energy consumption; environmental impact; life cycle assessment; technology; Catalysis; Environmental Pollutants; Nitrates; Palladium
Type
journal article
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