Browsing by Author "Bollen, Brad"

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Development and Optimization of a Sampling and Analytical Method to Measure Hexavalent Chromium in Ambient Air
(Trenton, N.J. : New Jersey Department of Environmental Protection, 2009-10-07) Fan, Zhihua (Tina); Lin, Lin; Huang, LiHui; Yu, Chang Ho; Buckley, Brian; Bollen, Brad; Bonanno, Linda
The overall goal of this study was to develop a sensitive and reliable method for the measurement of ambient airborne Cr(VI) by systematically evaluating and optimizing the sampling, sample processing and analytical processes. This method can also simultaneously quantify the inter-conversion rates between Cr(VI) and Cr(III) and the recovery rate of Cr(VI).
Development and Optimization of a Sampling and Analytical Method to Measure Hexavalent Chromium in Ambient Air: Research Project Summary
(Trenton, N.J. : New Jersey Department of Environmental Protection, Office of Science, 2010-11) Bonanno, Linda J.; Bollen, Brad; Fan, Zhihua ( Tina)
The overall goal of this study was to develop a sensitive and reliable method for the measurement of ambient airborne hexavalent chromium [Cr(VI)] by systematically evaluating and optimizing the sampling, sample processing and analytical processes. This method can also simultaneously quantify the inter-conversion rates between Cr(VI) and trivalent chromium [Cr(III)] and the recovery rate of Cr(VI). The specific aims of this study are: 1) to optimize the (IC/ICPMS) method for Cr(VI) analysis, e.g., lower the detection limit to the one in a million risk level i.e., 0.083 ng/m3; 2) to reduce the Cr(VI) background level on the blank filter; 3) to determine the recovery and conversion rate of Cr(VI) and Cr(III) during sampling, storage and extraction; 4) to characterize the factors that have been suggested to potentially affect the stability of Cr(VI), i.e., particle types, relative humidity (RH), temperature (T), ozone (O3 ), sulfur dioxide (SO2 ) and nitrogen dioxide (NO2 ) in ambient air; and 5) to evaluate the developed method in the field during summer and winter seasons.
Urban Community Air Toxics Monitoring Project, Paterson City, NJ
(Trenton, N.J. : Department of Environmental Protection, Office of Science, 2010-02-24) Bonanno, Linda; Bollen, Brad; Boyko, Olga; Carter, Gail; Fan, Zhi-Hua (Tina); Korn, Leo; Lin, Lin; Mayes, Peter; Snyder, Erica; Yu, Chang Ho; Stern, Alan
The overall objectives of the Urban Community Air Toxics Monitoring Project, Paterson City, NJ, (UCAMPP) was to provide information and develop tools and methods so that the NJDEP and communities can better address exposure and risk issues related to air toxics through the characterization of local air associated with different land use patterns in a highly industrialized urban community. Three air monitoring stations were set up on the rooftops of three buildings in Paterson, with the aim of capturing industrial, commercial and mobile source-dominated emissions over the course of one year. The background monitoring site was located ~45 km WSW of Paterson in Chester, NJ. UCAMPP's specific aims were to 1) characterize the spatial resolution of local air toxics; 2) determine concentration gradients; 3) identify source signatures from various land uses; 4) evaluate modeling results using monitoring data; 5) field test new sampling and analytical techniques for air toxics that are currently difficult to quantify; 6) characterize the concerns of an Environmental Justice (EJ) type community; 7) identify risk reduction strategies, and 8) implement feasible strategies. This study will serve as a pilot project and provide valuable information that can be applied to other communities around the state and the nation.