At SF State since 1999
Title(s): Department Chair, Professor
Department: Chemistry & Biochemistry
Location: SEIC-211B, SF State
Phone Number: (415) 338-1292
Email: bmanning@sfsu.edu
Education
B.S. (1985) Univ.of Massachusetts, Environmental Science
Ph.D. (1993) Univ. of CA Davis, Environmental Chemistry
Research Areas: Analytical and Environmental Chemistry
Our group studies the origin, fate, transport, and remediation of inorganic contaminants in soil and groundwater environments. We focus on the solution and surface chemistry of redox-sensitive elements such As(III)/(V), Cr(III)/(V), Se(IV)/(VI) and the analytical speciation of these elements in complex matrices such as soil, sediment, and wastewater. Specific topics include:
Environmental Remediation: Development and characterization of sorbents such as synthetic metal oxides and metal oxide-coated substrates, nanoscale silver and zero-valent iron, and supported zero-valent iron for removal of metal cation (Pb(II), Cd(II), Zn(II)) and anion (As(V), Cr(VI), Se(VI)) contaminants. Heterogeneous reactions of redox-sensitive elements such as As, Cr, and Se at natural mineral surfaces.
Chemical Analysis: Separation and detection of redox sensitive elements (As(III)/As(V), Se(IV)/Se(VI) and Cr(III)/Cr(VI)) by hyphenated techniques such as ion chromatography coupled with AA, ICP or ICP-MS spectrometry. Detection of trace elements using UV-VIS, graphite-furnace electrothermal AA and MP-AES spectrometry. Elemental analysis by X-ray fluorescence (XRF).
Spectroscopy: Applications of X-ray absorption spectroscopy (EXAFS and XANES) and X-ray photoelectron spectroscopy (XPS) for elucidation of the structure of metal cation and oxyanion surface complexes on synthetic materials (nanomaterials, metal surfaces, metal oxides) and natural minerals found in soil and groundwater aquifers.
Microscopy and Particle Analysis: Applications of scanning electron microscopy (SEM) for surface analysis of minerals and nanoparticle imaging and use of energy dispersive analysis of X-rays (EDX) for elemental analysis of materials. Analysis of synthetic nanoparticles, metal oxides and natural soil and sediment minerals by X-ray diffraction, BET N2 and EGME methods and electrophoretic mobility.
Chemical Modeling: Chemical modeling of redox speciation, precipitation, and adsorption reaction constants in environmental systems using PHREEQC, GEOCHEM, MINTEQ, and FITEQL.