个人简介

Ph.D. in Geological Engineering, University of Utah

研究领域

Analytical and Environmental Chemistry

Current Projects Municipal sewage sludge based composite adsorbents for removal of contaminants from drinking water sources (Funded by USEPA, with Prof. Bandosz, Chemistry) The objectives of this project are to: (1) Conduct laboratory batch tests to evaluate the performance of sewage sludge based adsorbents for the removal of the following groups of compounds: (a) carcinogenic volatile organic compounds (VOCs); (b) nitrosamine disinfection byproducts; and (c) pharmaceuticals and endocrine disrupting compounds (EDCs); (2) Optimize processing conditions to produce the most efficient sludge based adsorbent for the removal of aforementioned contaminants from drinking water sources; and (3) Conduct field pilot scale column tests to evaluate the performance of the optimal adsorbent for the removal of VOCs at the Cadmus Place Groundwater Treatment Plant and pharmaceuticals and EDCs at the Little Falls Water Treatment Plant, both in NJ. Identifying organic iodine species in aerosols using LC/MS/MS (funded by CUNY, with Prof. Jans, Chemistry) Condensable iodine-containing vapors in marine atmosphere may form new particles in the marine boundary layer and affect the Earth’s radiative budget (and global climate). Iodine in the atmosphere may also act as a catalyst for destruction of tropospheric ozone. Recent studies on the speciation of iodine in aerosols reveal that soluble organic iodine (SOI) is globally ubiquitous and is the dominant iodine species. The exact molecular structures of the SOI species in aerosols, however, remain unknown. Previous investigations on iodine speciation in natural waters, soils and sediments indicate that a significant, sometimes predominant, proportion of dissolved iodine was associated with natural organic matter (NOM), and specifically humic and fulvic acids. In this project we attempt to identify the molecular structures of SOI using liquid chromatography tandem mass spectrometry (LC/MS/MS). We first react I2(aq) with reference humic and fulvic acids and examine the molecular structures of iodinated derivatives. We will then identify the molecular structures of SOI species in marine aerosol samples collected globally. We will further examine whether SOI would decompose to release iodide by reacting with ozone and hydrogen peroxide. Information obtained from this study will significantly advance our understanding of the iodine cycle process in the atmosphere. Removal of antibiotics from contaminated waters using natural zeolite In this project we examine the adsorption of tetracyclines and fluoroquinolones by natural zeolite. These antibiotics have multiple pKa values and partial positive moieties at environmentally relevant pH (5-9). Since the surface of natural zeolite is negatively charged, it is hypothesized that these antibiotics will be adsorbed onto zeolite surface via electrostatic interactions (cation exchange) at environmentally relevant pH. Positive results would lead to many applications of natural zeolite in removing selected antibiotics. For instance, zeolite could be used as filter media in wastewater treatment plants to treat secondary effluent. Zoelite could also be used as the filtration bed in artificial recharge ponds where municipal wastewater is recharged to groundwater (wastewater reclamation and reuse). The low cost and high permeability together with high capacity sorption would make zeolite a very attractive sorbent material. Zeolite could also be used as bedding material in animal feedlots or as feed additive so antibiotics could be retained before leaching to soils.

近期论文

查看导师新发文章 （温馨提示：请注意重名现象，建议点开原文通过作者单位确认）

Wallace, R., M. Seredych, P. Zhang, and T. J. Bandosz, 2014. Municipal waste conversion to hydrogen sulfide adsorbents: Investigation of the synergistic effects of sewage sludge/fish waste mixture. Chem. Eng. J. 237(1), 88-94. Hu, Q.H., *Z.Q. Xie, X.M. Wang, H. Kang, and P. Zhang. 2013. Levoglucosan indicates high levels of biomass burning aerosols over oceans from the Arctic to Antarctic. Sci. Rep. (by Nature Publishing Group), 3: 3119, DOI:10.1038/srep03119. Hu, Q.H., *Z.Q. Xie, X.M. Wang, H. Kang, Q.F. He and P. Zhang. 2013. Secondary organic aerosols over oceans via oxidation of isoprene and monoterpenes from Arctic to Antarctic. Sci. Rep. (by Nature Publishing Group), 3: 2280, DOI: 10.1038/srep02280. Cheng, W., *L. Sun, W. Huang, T. Ruan, Z. Xie, P. Zhang, R. Ding, and M. Li. 2013. Detection and distribution of Tris(2-chloroethyl) phosphate on the East Antarctic ice sheet. Chemosphere, 92(8), 1017-1021. #DeVries, S. L., W. Liu, N. Wan, *P. Zhang, and *X. Li. 2012. Biodegradation of MIB, Geosmin, and Microcystin-LR in Sand Columns Containing Lake Taihu Sediment. Water Sci. Technol.: Water Supply, 12(5), 691-698. #Ding, R., *P. Zhang, M. Seredych, and *T. J. Bandosz. 2012. Removal of antibiotics from water using sewage sludge and waste oil sludge derived adsorbents, Water Res. 46(13), 4081-4090. #Yang, L., X. Li, P. Zhang, M. E. Melcer, Y. Wu, and *U. Jans. 2012. Concentrations of organochlorine pesticides in Long Island Sound sediment, J. Environ. Monitor. 14 (3), 878 - 885. Liu, X, S. Jiang, P. Zhang, L. Xu. 2012. Effect of recent climate change on Arctic Pb pollution: a comparative study of historical records in lake and peat sediments, Environ. Pollut. 160, 161-168. #Zhao, S., *P. Zhang, J. Crusius, K.D. Kroeger and J.F. Bratton. 2011. Use of pharmaceuticals and pesticides to constrain nutrient sources in coastal groundwater of Northwestern Long Island, New York, USA, J. Environ. Monitor. 13, 1337-1343. S. Xu, H. Kang, Z. Xie, L. Sun, W. Liu, H. Yang, B. Li, and P. Zhang, 2010, Iodine speciation in marine aerosols along a 15000-km round-trip cruise path from Shanghai, China, to the Arctic Ocean, Environ. Chem. 7, 406 - 412. #S. Zhao, *P. Zhang, M. E. Melcer, and J. F. Molina. 2010. Estrogens in streams associated with a concentrated animal feeding operation in Upstate New York, USA. Chemosphere, 79, 420-425. *Zhang, P., #S. DeVries, #A. Dathe, and A. C. Bagtzoglou. 2009. Enhanced mixing and plume containment in porous media under time dependent oscillatory flow, Environ. Sci. Technol., 43, 6283-6288. Xie, Z., P. Zhang, L. Sun, S. Xua, Y. Huang, and W. He. 2008. Microanalysis of metals in barbs of a snow petrel (Pagodroma Nivea) from the Antarctica using synchrotron radiation X-ray fluorescence, Mar. Pollut. Bull., 56, 516-524. #Yang, L., X. Li, U. Jans, J. Crusius, M. E. Melcer, and *P. Zhang. 2007. Persistent chlordane concentrations in Long Island Sound sediment: Implications from chlordane, 210Pb, and 137Cs depth profiles, Environ. Sci. Technol., 41, 7723-7729. #Li, X., #L. Yang, U. Jans, M. E. Melcer, and *P. Zhang. 2007. Lack of enantioselective microbial degradation of chlordane in Long Island Sound sediment, Environ. Sci. Technol., 41, 1635-1641. *Zhang, P., #D.M. Avudzega, and R.S. Bowman. 2007. Removal of perchlorate from contaminated waters using surfactant-modified zeolite, J. Environ. Qual. 36: 1069-1075. *Zhang, P. and #A.B.M. Pathan. 2007. Sorption and desorption of perchlorate on surfactant-modified zeolite, Stud. Surf. Sci. Catal., 170: 2086-2091. Jones, H. K, Z. Li, P. Zhang, and R. S. Bowman. 2007. Chromate transport through columns packed with surfactant-modified zeolite/zero valent iron pellets, Chemosphere, 68(10): 1861-1866. Li, Z., C. Willms, J. Alley, P. Zhang, and R. S. Bowman. 2006. A shift in pathway of iron-mediated perchloroethylene reduction in the presence of sorbed surfactant - a column study. Water Res., 40 3811-3819. *Zhang, P. and #Y. Wang. 2006. Epi-fluorescence imaging of colloid transport in porous media at decimeter scales, Environ. Sci. Technol., 40, 6064-6069.