Affiliation: University of Arizona
Ramos Ruiz A, Field J, Sun W, Sierra Alvarez R. Gallium arsenide (GaAs) leaching behavior and surface chemistry changes in response to pH and O2. Waste Manag. 2018;77:1-9 pubmed publisher
..These findings suggest that further research is needed to assess the potential release of toxic As from electronic waste in municipal landfills. ..
Rodriguez Freire L, Balachandran R, Sierra Alvarez R, Keswani M. Effect of sound frequency and initial concentration on the sonochemical degradation of perfluorooctane sulfonate (PFOS). J Hazard Mater. 2015;300:662-669 pubmed publisher
..Overall, the results of this study demonstrate that high PFOS concentration can be effectively sonochemically treated using megasonic frequencies. ..
Olivares C, Wang J, Luna C, Field J, Abrell L, Sierra Alvarez R. Continuous treatment of the insensitive munitions compound N-methyl-p-nitro aniline (MNA) in an upflow anaerobic sludge blanket (UASB) bioreactor. Chemosphere. 2016;144:1116-22 pubmed publisher
..MPD can be removed through extensive polymerization. These insights could help define efficient treatment options for waste streams polluted with MNA. ..
Zeng C, Nguyen C, Boitano S, Field J, Shadman F, Sierra Alvarez R. Cerium dioxide (CeO2) nanoparticles decrease arsenite (As(III)) cytotoxicity to 16HBE14o- human bronchial epithelial cells. Environ Res. 2018;164:452-458 pubmed publisher
..These data emphasize the evaluation of mixtures when assaying toxicity. ..
Sierra Alvarez R, Cortinas I, Yenal U, Field J. Methanogenic inhibition by arsenic compounds. Appl Environ Microbiol. 2004;70:5688-91 pubmed
..1 and 15.0 microM, respectively, whereas pentavalent species were generally nontoxic. The nitrophenylarsonate derivate, roxarsone, displayed moderate toxicity. ..
Sierra Alvarez R, Cortinas I, Field J. Methanogenic inhibition by roxarsone (4-hydroxy-3-nitrophenylarsonic acid) and related aromatic arsenic compounds. J Hazard Mater. 2010;175:352-8 pubmed publisher
..These results confirm the microbial toxicity of organoarsenic compounds, and they indicate that biotic as well as abiotic transformations can potentially impact the fate and microbial toxicity of these contaminants in the environment. ..
Olivares C, Field J, Simonich M, Tanguay R, Sierra Alvarez R. Arsenic (III, V), indium (III), and gallium (III) toxicity to zebrafish embryos using a high-throughput multi-endpoint in vivo developmental and behavioral assay. Chemosphere. 2016;148:361-8 pubmed publisher
..Overall, our results represent the first characterization of multidimensional toxicity effects of III/V ions in zebrafish embryos helping to fill a significant knowledge gap, particularly in Ga(III) and In(III) toxicology. ..
Ramos Ruiz A, Wilkening J, Field J, Sierra Alvarez R. Leaching of cadmium and tellurium from cadmium telluride (CdTe) thin-film solar panels under simulated landfill conditions. J Hazard Mater. 2017;336:57-64 pubmed publisher
..The remarkable difference in the leaching behavior of CdTe in the columns is related to different aqueous pH and redox conditions promoted by the microbial communities in the columns, and is in agreement with thermodynamic predictions. ..
Madeira C, Field J, Simonich M, Tanguay R, Chorover J, Sierra Alvarez R. Ecotoxicity of the insensitive munitions compound 3-nitro-1,2,4-triazol-5-one (NTO) and its reduced metabolite 3-amino-1,2,4-triazol-5-one (ATO). J Hazard Mater. 2018;343:340-346 pubmed publisher
..However, both compounds led to swimming behavior abnormalities at low concentrations (7.5?M). The results indicate that the reductive biotransformation of NTO could enhance or lower its toxicity according to the target organism. ..