Research Topics
| K G KarthikeyanSummaryAffiliation: University of Wisconsin Country: USA Publications
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Detail Information
Publications
Solution chemistry effects on orthophosphate adsorption by cationized solid wood residuesK G Karthikeyan
Biological Systems Engineering Department, 460 Henry Mall, University of Wisconsin, Madison, Wisconsin 53706, USA
Environ Sci Technol 38:904-11. 2004..e., 2.5-3 for SO4(2-) and 25 for NO3-, to cause appreciable reduction. These results support our hypothesis that adsorption of orthophosphate anions on cationized bark involves ion exchange and other specific Lewis acid-base interactions...- Occurrence of antibiotics in wastewater treatment facilities in Wisconsin, USAK G Karthikeyan
Department of Biological Systems Engineering, 460 Henry Mall, University of Wisconsin Madison, WI 53706, USA
Sci Total Environ 361:196-207. 2006..Future intensive wastewater monitoring programs in Wisconsin may be limited to the six antibiotic compounds detected in this study... - Corn residue level and manure application timing effects on phosphorus losses in runoffJoseph D Grande
Biological Systems Engineering Department, 460 Henry Mall, University of Wisconsin, Madison, WI 53706, USA
J Environ Qual 34:1620-31. 2005.... - Sorption of the antibiotic tetracycline to humic-mineral complexesCheng Gu
Univ of Wisconsin Madison, Madison, WI 53706, USA
J Environ Qual 37:704-11. 2008..It, therefore, appears that the presence of humic substances, in both dissolved and mineral-bound forms, is likely to increase the environmental mobility of tetracycline compounds... - Complexation of the antibiotic tetracycline with humic acidCheng Gu
Environmental Chemistry and Technology Program, University of Wisconsin Madison, Madison, WI 53706, United States
Chemosphere 66:1494-501. 2007..Sorption-desorption hysteresis was observed; both sorption and desorption isotherms were well described by the Freundlich equation... - Interaction of tetracycline with aluminum and iron hydrous oxidesCheng Gu
Environmental Chemistry and Technology Program, University of Wisconsin-Madison, Madison, Wisconsin 53706, USA
Environ Sci Technol 39:2660-7. 2005..Our research findings will increase understanding of the environmental occurrence, fate, and transport characteristics of antibiotics, which are considered as emerging organic contaminants... - Determination of phosphorus speciation in dairy manure using XRD and XANES spectroscopyKerem Güngör
Biological Systems Engineering Dep, University of Wisconsin Madison, 460 Henry Mall, Madison, WI 53706, USA
J Environ Qual 36:1856-63. 2007.... 
Phosphorus flow and characterization in dry-grind corn ethanol plantsA Alkan-Ozkaynak
Department of Biological Systems Engineering, University of Wisconsin, Madison, WI, USA
J Environ Qual 41:1695-701. 2012..Our results would help track P movement during various dry-grind processing steps and formulate strategies for phytase enzyme supplementation to various postfermentation coproducts from corn-ethanol plants...- Phosphorus forms and extractability in dairy manure: a case study for Wisconsin on-farm anaerobic digestersKerem Güngör
Biological Systems Engineering Department, University of Wisconsin Madison, Madison, WI 53706, USA
Bioresour Technol 99:425-36. 2008..Anaerobic digestion of dairy manure appears capable of reducing the fraction of P that is immediately available by increasing the stability of the solid phases controlling P solubility... - Copper and cadmium sorption onto kraft and organosolv ligninsHengky Harmita
Department of Biological Systems Engineering, University of Wisconsin Madison, 460 Henry Mall, Madison, WI 53706, USA
Bioresour Technol 100:6183-91. 2009..Additional pretreatment and surface modifications of these biosorbents might be required to increase metal sorption capacity and enhance their use in waster/wastewater treatment... - Sorption of the antimicrobial ciprofloxacin to aluminum and iron hydrous oxidesCheng Gu
Department of Biological Systems Engineering, Environmental Chemistry and Technology Program, University of Wisconsin, Madison 53706, USA
Environ Sci Technol 39:9166-73. 2005..The study results are expected to increase our understanding of the environmental reactivity of fluoroquinolones, an important class of antimicrobial compounds... - Anaerobic digestion of thin stillage for energy recovery and water reuse in corn-ethanol plantsA Alkan-Ozkaynak
Department of Biological Systems Engineering, University of Wisconsin Madison, 460 Henry Mall, Madison, WI, USA
Bioresour Technol 102:9891-6. 2011..Anaerobic digestion of treated-thin stillage can be expected to improve the water and energy efficiencies of dry grind corn-ethanol plants... - Instrumentation for measuring runoff, sediment, and chemical losses from agricultural fieldsCarlos A Bonilla
Department of Soil Science, University of Wisconsin Madison, 1525 Observatory Drive, Madison, WI 53706, USA
J Environ Qual 35:216-23. 2006..This article includes a description of the equipment, advantages, and disadvantages based on 2 yr of operation, and examples of data collected... - Residue level and manure application timing effects on runoff and sediment lossesJoseph D Grande
Biological Systems Engineering Department, University of Wisconsin, Madison, WI 53706, USA
J Environ Qual 34:1337-46. 2005..Recently applied manure and higher residue levels achieved by high-cutting silage can substantially lower sediment losses in spring runoff when soil is most susceptible to erosion... - Phosphorus dynamics in soils receiving chemically treated dairy manureM Kalbasi
Biological Systems Engineering Department, 460 Henry Mall, University of Wisconsin, Madison, WI 53706, USA
J Environ Qual 33:2296-305. 2004..The study results will help bridge the gap between our knowledge of chemical treatment systems for animal manure and the ultimate fate of P when the treated manure is land-applied... - Humic acid complexation of basic and neutral polycyclic aromatic compoundsK G Karthikeyan
Department of Biological Systems Engineering, The University of Wisconsin, Madison 53706, USA
Chemosphere 48:955-64. 2002..In contrast to ionizable PACs, studied here and previously, interaction of naphthalene with HA is unaffected by changes in solution conditions (pH, ionic strength)... - Adsorption mechanism of cadmium on juniper bark and woodEun Woo Shin
School of Chemical Engineering and Bioengineering, University of Ulsan, San 29, Mugeo dong, Nam Gu, Ulsan 680 749, South Korea
Bioresour Technol 98:588-94. 2007..The higher Ca content in JB (15 times more) and the surface RCOOH concentration (2.5 times more) can be attributed to the observed differences in Cd adsorption behavior between the two lignocellulosic adsorbents... - Orthophosphate sorption onto lanthanum-treated lignocellulosic sorbentsEun Woo Shin
School of Chemical Engineering and Bioengineering, University of Ulsan, San 29, Muger 2-dong, Nam-ku, Ulsan 680-749, South Korea
Environ Sci Technol 39:6273-9. 2005..Results from X-ray diffraction and infrared spectrometric analyses are also suggestive of the occurrence of surface precipitation during the interaction of orthophosphate with La-treated lignocellulosic materials... - Linking cesium and strontium uptake to kaolinite weathering in simulated tank waste leachateJon Chorover
Department of Soil, Water and Environmental Science, University of Arizona, Tucson, Arizona 85721, USA
Environ Sci Technol 37:2200-8. 2003..Discrete strontium silicate solids were also observed. The incongruent dissolution of kaolinite promoted the sequestration of contaminants into increasingly recalcitrant solid phases over the 1-yr time period... - Cesium adsorption on clay minerals: an EXAFS spectroscopic investigationBenjamin C Bostick
Stanford University, Department of Geological and Environmental Sciences, California 94305-2115, USA
Environ Sci Technol 36:2670-6. 2002..Our results show that X-ray absorption spectroscopy (XAS), and particularly EXAFS, is a valuable technique for exploring the type of Cs binding in environmental samples...