The University of Massachusetts Amherst
 
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Mariana Lopes

Assistant Professor

Academic Background: 

Post Doc 2020 University of Colorado Boulder, Colorado
PhD 2020 Arizona State University, Arizona
MS 2017 Arizona State University , Arizona
BS 2015 University of Dayton, Ohio

 

Research Background:

Pathogenic bacteria growth on surfaces creates health hazards and
operational problems in water, air and biomedical devices. In healthcare
there are roughly 2 million hospital associated infections resulting in
99,000 deaths each year, costing hospitals $28-45 billion annually.
Chemical management works for a short duration (days) damages surfaces
and produces harmful by-products. Ultraviolet (UV) radiatio is a
chemical-free disinfection process. However, it is nearly impossible to
distribute UV light through the inside of small channels. The lopes lab
is developing germicidal optical fibers (GOFs) to distribute UVC
radiation through tight channels to prevent infections and operational
issues caused by biofilms. We interfere with the evanescence wave on the
surface of the UV transmitting optical fiber that results in emission
of UVC radiation. The germicidal light is emitted through the length of
the fiber (like a glowstick), inactivating microorganisms in its
vicinity. GOFs were demonstrated effective for inactivation and growth
prevention of E. coli and P. aeruginosa. GOFs are bendable and can also
be configured into tight or complex geometries. GOFs are ideal for use
in medical equipment (i.e. endoscopes, catheters and respirators) home
devices (coffee makers and refrigerators), and water
storage/distribution systems (pipes, bladders, membranes).

Research Interest:

Our group seeks to engineer platforms that enhance light transport and reactions
for photon-driven applications.This includes using Nano-enabled
technologies for light-driven chemical transformations while optimizing
hydraulics and optical paths of reactor designs. Recent research focuses
on biofilm prevention and bacterial inhibition in tight channels using
ultraviolet radiation and developing light-driven destruction methods
for the removal of PFAS and other chemicals of concern from drinking
water and medical surfaces. We are currently focused on enabling UV
sterilization of tight channels in medical equipment's such as
endoscopes and catheters. We work at the interface of basic science and
industry to create innovative and green technologies applicable to
today’s social and economic climate.

Falinski, M.,Turley, R., Kidd, J., Lounsbury, A., Lanzarini-Lopes, M., et al. Doing nano-enabled water treatment right: Sustainability considerations from design and research through development and implementation. Environmental Science Nano, 2020. 7(11):3255-3278.
Lanzarini-Lopes, M., Zhao, Z., Perreault, F., Garcia-Segura, S., Westerhoff, P., Germicidal glowsticks: Side-emitting optical fibers inhibit Pseudomonas aeruginosa and Escherichia coli on surfaces. Water Research, 2020. 184 116-191.
Zhao, Z., Zhang, Z., Lanzarini-Lopes, M., Sinha, S., Rho, H., Herckes, P., Westerhoff, P., Germicidal Ultraviolet Light Does Not Damage or Impede Performance of N95 Masks Upon Multiple Uses. Environmental Science and Technology Letters. 2020. 7(8):600-605
Lanzarini-Lopes, M., Cruz, B., Garcia-Segura, S., Alum, A., Abbaszadegan, M., Westerhoff, P. Nanoparticle and Transparent Polymer Coatings Enable UV-C Side-Emission Optical Fibers for Microbial Inactivation in Water. Environmental Science and Technology, 2019. 53(18):10880-10887.
Lanzarini-Lopes, M., Garcia-Segura, S., Hristovski, Simons, A. J., Messerly, M., K., Westerhoff, P. Particle-modified Polymeric Cladding on Glass Optical Fibers Enhances Radial Light Scattering. Journal of Optical Society of America B. Optical Physics. 2019. 36(6):1623-1628.
Garcia-Segura, S., Lanzarini-Lopes, M., Hristovski, K., Westerhoff, P. Electrocatalytic Reduction of nitrate: Fundamentals to Full-scale Water Treatment Applications. Applied Catalysis B: Environmental, 2018. 236:546-568.
Lanzarini-Lopes, M., Delgado, A.G., Guo, Y., Dahlen, P., Westerhoff, P. Optical Fiber-Mediated Photosynthesis for Enhanced Subsurface Oxygen Delivery, Chemosphere, 2018. 195:742-748.
Lanzarini-Lopes, M., Garcia-Segura, S., Hristovski, K., Westerhoff, P. Electrical Energy per Order and Current Efficiency for Electrochemical Oxidation of p-Chlorobenzoic Acid with Boron-Doped Diamond anode. Chemosphere, 2017 188:304-311.
Lanzarini Lopes, M., Stechel, E., Sandrolini, J., Johnson, N. Concentrating Solar Power Systems with Advanced Thermal Energy Storage for Emerging Markets. Institute of Electrical and Electronics Engineers, 2016. pp. 444–450.
 
Contact Info

Civil and Environmental Engineering
Marston 16C
130 Natural Resources Rd,
Amherst, MA 01003-9292

Office: (440)-241-2218
marianalopes@umass.edu
https://blogs.umass.edu/marianalopes/