Search Results - "PIGNATELLO, J. J"

Activity and Reactivity of Pyrogenic Carbonaceous Matter toward Organic Compounds by Pignatello, J. J, Mitch, William A, Xu, Wenqing

“…Pyrogenic carbonaceous matter (PCM) includes environmental black carbon (fossil fuel soot, biomass char), engineered carbons (biochar, activated carbon), and…”
Get full text

Comparison of Halide Impacts on the Efficiency of Contaminant Degradation by Sulfate and Hydroxyl Radical-Based Advanced Oxidation Processes (AOPs) by Yang, Yi, Pignatello, Joseph J, Ma, Jun, Mitch, William A

“…The effect of halides on organic contaminant destruction efficiency was compared for UV/H2O2 and UV/S2O8 2– AOP treatments of saline waters; benzoic acid,…”
Get full text

The Fenton Reaction in Water Assisted by Picolinic Acid: Accelerated Iron Cycling and Co-generation of a Selective Fe-Based Oxidant by Yang, Zhichao, Shan, Chao, Pan, Bingcai, Pignatello, Joseph J

“…The Fenton reaction is limited by a narrow acidic pH range, the slow reduction of Fe­(III), and susceptibility of the nonselective hydroxyl radical (HO•) to…”
Get full text

Advanced Oxidation Processes for Organic Contaminant Destruction Based on the Fenton Reaction and Related Chemistry by Pignatello, Joseph J., Oliveros, Esther, MacKay, Allison

“…Fenton chemistry encompasses reactions of hydrogen peroxide in the presence of iron to generate highly reactive species such as the hydroxyl radical and…”
Get full text

Effect of Halide Ions and Carbonates on Organic Contaminant Degradation by Hydroxyl Radical-Based Advanced Oxidation Processes in Saline Waters by Grebel, Janel E, Pignatello, Joseph J, Mitch, William A

“…Advanced oxidation processes (AOPs) generating nonselective hydroxyl radicals (HO•) provide a broad-spectrum contaminant destruction option for the…”
Get full text

Participation of the Halogens in Photochemical Reactions in Natural and Treated Waters by Yang, Yi, Pignatello, Joseph J

“…Halide ions are ubiquitous in natural waters and wastewaters. Halogens play an important and complex role in environmental photochemical processes and in…”
Get full text

Influence of Ionic Strength on Triplet-State Natural Organic Matter Loss by Energy Transfer and Electron Transfer Pathways by Parker, Kimberly M, Pignatello, Joseph J, Mitch, William A

“…Triplet state excited natural organic matter chromophores (3NOM*) are important reactive intermediates in indirect photochemical processes, yet the impact of…”
Get full text

Sorbic acid as a quantitative probe for the formation, scavenging and steady-state concentrations of the triplet-excited state of organic compounds by Grebel, Janel E., Pignatello, Joseph J., Mitch, William A.

“…Sorbic acid ( trans,trans-hexadienoic acid) was developed as a probe for the quantification of the formation rate, overall solution scavenging rate and…”
Get full text

Effect of Natural Organic Substances on the Surface and Adsorptive Properties of Environmental Black Carbon (Char):  Attenuation of Surface Activity by Humic and Fulvic Acids by Pignatello, Joseph J, Kwon, Seokjoon, Lu, Yufeung

“…Black carbon (BC) plays a potentially important role in the availability of pollutants in soils and sediments. Recent evidence points to the possible…”
Get full text

Thermal air oxidation changes surface and adsorptive properties of black carbon (char/biochar) by Xiao, Feng, Bedane, Alemayehu H., Zhao, Julia Xiaojun, Mann, Michael D., Pignatello, Joseph J.

“…•Black carbon (BC) made by thermal air pyrolysis had underdeveloped pore structure.•Substantial changes were observed by post-pyrolysis thermal air oxidation…”
Get full text

Adsorption of Single-Ring Organic Compounds to Wood Charcoals Prepared under Different Thermochemical Conditions by Zhu, Dongqiang, Kwon, Seokjoon, Pignatello, Joseph J

“…Environmental black carbon (BC) is believed to be an important adsorbent of organic pollutants. In this study, we examined the effects of changes in surface…”
Get full text

Characterization of Aromatic Compound Sorptive Interactions with Black Carbon (Charcoal) Assisted by Graphite as a Model by Zhu, Dongqiang, Pignatello, Joseph J

“…Molecular interactions controlling the sorption of pollutants to environmental black carbons (soot, charcoal) are not well-resolved. Sorption of a series of…”
Get full text

Effect of Natural Organic Substances on the Surface and Adsorptive Properties of Environmental Black Carbon (Char):  Pseudo Pore Blockage by Model Lipid Components and Its Implications for N2-Probed Surface Properties of Natural Sorbents by Kwon, Seokjoon, Pignatello, Joseph J

“…Black carbon (BC; char and soot) particles emitted to the environment typically are formed with high microporosity and surface area, properties that are…”
Get full text

Competitive Sorption Used To Probe Strong Hydrogen Bonding Sites for Weak Organic Acids on Carbon Nanotubes by Li, Xiaoyun, Gámiz, Beatriz, Wang, Yiquan, Pignatello, Joseph J, Xing, Baoshan

“…We recently proposed that weak acids (AH) adsorb to partially oxidized carbonaceous materials in part by forming strong hydrogen bonds with acidic surface…”
Get full text

Evidence for an Additional Oxidant in the Photoassisted Fenton Reaction by Pignatello, Joseph J, Liu, Di, Huston, Patrick

“…The photo-Fenton reaction (Fe3+ + H2O2 + UV) has potential applications in wastewater treatment. This reaction was compared to H2O2 photolysis and other…”
Get full text

Sunlight-Driven Photochemical Halogenation of Dissolved Organic Matter in Seawater: A Natural Abiotic Source of Organobromine and Organoiodine by Méndez-Díaz, José Diego, Shimabuku, Kyle K, Ma, Jing, Enumah, Zachary O, Pignatello, Joseph J, Mitch, William A, Dodd, Michael C

“…Reactions of dissolved organic matter (DOM) with photochemically generated reactive halogen species (RHS) may represent an important natural source of…”
Get full text

Rapid and Convenient Potentiometric Method for Determining Fluorosulfate, a Byproduct of the Fumigant and Greenhouse Gas Sulfuryl Fluoride by Chen, Zhihao, Wang, Chengjin, Pignatello, Joseph J

“…A fluorosulfate ion (FSO3 –) is a hydrolysis product of sulfuryl fluoride (SO2F2), which is widely used to fumigate buildings, soil, construction materials,…”
Get full text

Degradation of selected pesticide active ingredients and commercial formulations in water by the photo-assisted Fenton reaction by Huston, Patrick L, Pignatello, Joseph J

“…The destruction of pesticide active ingredients (AI) and commercial formulations in acidic aqueous solution with the catalytic photo-Fenton, Fe(III)/H 2O 2/UV,…”
Get full text

Mechanisms of Slow Sorption of Organic Chemicals to Natural Particles by Pignatello, Joseph J, Xing, Baoshan

“…The use of equilibrium expressions for sorption to natural particles in fate and transport models is often invalid due to slow kinetics. This paper reviews…”
Get full text

Sequestration of Hydrophobic Organic Contaminants by Geosorbents by Luthy, Richard G, Aiken, George R, Brusseau, Mark L, Cunningham, Scott D, Gschwend, Philip M, Pignatello, Joseph J, Reinhard, Martin, Traina, Samuel J, Weber, Walter J, Westall, John C

“…The chemical interactions of hydrophobic organic contaminants (HOCs) with soils and sediments (geosorbents) may result in strong binding and slow subsequent…”
Get full text