Assessing the environmental impact of five Pd-based catalytic technologies in removing of nitrates

Chiueh, Pei-Te; Lee, Yu-Hung; Su, Chih-Yi; Lo, Shang‐Lien

doi:10.1016/j.jhazmat.2011.05.096

Cited by 17 publications

(4 citation statements)

References 26 publications

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“…This is because the elevated nutrient loading to waterbodies associated with intensive agrochemical application 76 can increase GHGe both directly (via eutrophication of waterbodies) and indirectly via the increased effort needed to make water drinkable. 82,83 Energy consumption also increases due to aquifer depletion, which follows the trend of many parts of the world. 84,85 Irrigation technique could also be an important lever on future emissions in the face of these trends.…”

Section: ■ Discussionmentioning

confidence: 99%

“…The management of agrochemicals could be one critical lever on future emissions. This is because the elevated nutrient loading to waterbodies associated with intensive agrochemical application can increase GHGe both directly (via eutrophication of waterbodies) and indirectly via the increased effort needed to make water drinkable. , Energy consumption also increases due to aquifer depletion, which follows the trend of many parts of the world. , Irrigation technique could also be an important lever on future emissions in the face of these trends. For example, drip irrigation and the use of groundwater can lead to salinization, potentially reducing yields and consequently increasing product-related C footprints.…”

Section: Discussionmentioning

confidence: 99%

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Methane Emissions from Artificial Waterbodies Dominate the Carbon Footprint of Irrigation: A Study of Transitions in the Food–Energy–Water–Climate Nexus (Spain, 1900–2014)

Aguilera

Vila-Traver

Deemer

et al. 2019

Environ. Sci. Technol.

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Irrigation in the Mediterranean region has been used for millennia and has greatly expanded with industrialization. Irrigation is critical for climate change adaptation, but it is also an important source of greenhouse gas emissions. This study analyzes the carbon (C) footprint of irrigation in Spain, covering the complete historical process of mechanization. A 21-fold total, 6-fold area-based, and 4-fold product-based increase in the carbon footprint was observed during the 20th century, despite an increase in water use efficiency. CH4 emissions from waterbodies, which had not previously been considered in the C footprint of irrigation systems, dominated the emission budget during most of the analyzed period. Technologies to save water and tap new water resources greatly increased energy and infrastructure demand, while improvements in power generation efficiency had a limited influence on irrigation emissions. Electricity production from irrigation dams may contribute to climate change mitigation, but the amount produced in relation to that consumed in irrigation has greatly declined. High uncertainty in CH4 emission estimates from waterbodies stresses a need for more spatially resolved data and an improved empirical knowledge of the links between water quality, water level fluctuations, and emissions at the regional scale.

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Section: ■ Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

Methane Emissions from Artificial Waterbodies Dominate the Carbon Footprint of Irrigation: A Study of Transitions in the Food–Energy–Water–Climate Nexus (Spain, 1900–2014)

Aguilera

Vila-Traver

Deemer

et al. 2019

Environ. Sci. Technol.

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“…Mixtures of 50 mg of sorbent and 50 mL of aqueous solution were prepared at 11 different initial pH values (2)(3)(4)(5)(6)(7)(8)(9)(10)(11)(12). The pH was adjusted with 0.1 mol·L -1 HCl or NaOH and was measured again after 24 h. The relationship between the initial pH values and the change in pH with time determined the point at which the material became absorbent, pH PZC .…”

Section: Point Of Zero Charge (Ph Pzc ) Experimentsmentioning

confidence: 99%

“…According to Chiueh et al [6], methods for the removal or reduction of nitrate in aqueous solutions may be grouped into two main categories: i) transport, such as reverse osmosis, ion exchange, electrodialysis and sorption and ii) destruction, such as biological, chemical and catalytic denitrification.…”

mentioning

confidence: 99%

Nitrate sorption on activated carbon modified with CaCl2: Equilibrium, isotherms and kinetics

Zanella

Tessaro

Féris

2015

CI&CEQ

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Article Highlights• Activated carbon modified with CaCl 2 is an effective sorbent to remove nitrate from aqueous solutions • Maximum removal was between pH 3 and 9 • The Langmuir, Redlich-Peterson and Sips model isotherms represent the experimental data well with R 2 > 0.99• The sorption kinetics obeyed a second order kinetic model Abstract In this study, nitrate removal from aqueous solutions was investigated using granular activated carbon (GAC) modified with CaCl 2 . Batch sorption studies were performed as a function of sorbent dose, initial nitrate concentration and pH. Sorption was maximized between pH 3 and 9. Studies on the effect of pH showed that the ion exchange mechanism might be involved in the sorption process. The percentage of nitrate removed increased with increasing sorbent concentration, and the ideal sorbent dose was found to be 20 g·L -1 . Four isotherm models -Langmuir, Freundlich, Redlich-Peterson and Sips -were used to fit the experimental data. The Redlich-Peterson isotherm model explained the sorption process well and showed the best coefficient of determination (0.9979) and Chi-square test statistic (0.0079). Using the Sips isotherm model, the sorption capacity (q e ) was found to be 1.93 mg nitrate per g of sorbent. Kinetic experiments indicated that sorption was a fast process, reaching equilibrium within 120 min. The nitrate sorption kinetic data were successfully fitted to a pseudo-second-order kinetic model. The overall results demonstrated potential applications of modified GAC for nitrate removal from aqueous solutions.

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Overview of Nanomaterial-Assisted Technologies for Denitrification Processes

Mirbagheri

Sabbaghi

Chen

et al. 2019

Environmental Nanotechnology Volume 3

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Assessing the environmental impact of five Pd-based catalytic technologies in removing of nitrates

Cited by 17 publications

References 26 publications

Methane Emissions from Artificial Waterbodies Dominate the Carbon Footprint of Irrigation: A Study of Transitions in the Food–Energy–Water–Climate Nexus (Spain, 1900–2014)

Methane Emissions from Artificial Waterbodies Dominate the Carbon Footprint of Irrigation: A Study of Transitions in the Food–Energy–Water–Climate Nexus (Spain, 1900–2014)

Nitrate sorption on activated carbon modified with CaCl2: Equilibrium, isotherms and kinetics

Overview of Nanomaterial-Assisted Technologies for Denitrification Processes

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