Turning Waste Peony Leaves into Green Chemicals: an Exploratory Study Webinar
- Turning Waste Peony Leaves into Green Chemicals: an Exploratory Study
- Westmark Hotel, Fairbanks, AK
- Department of Civil and Environmental Engineering
- Washington State University
This talk presents an exploratory study that demonstrates the feasibility of deriving renewable chemicals from waste flower leaves and thus adding value to such agro-based waste materials. This preliminary study derived a liquid corrosion inhibitor through a zero-waste chemical and biological process that readily degrades the waste peony leaves. The effect of 0 to 3 vol.% of this peony-leaves-sourced inhibitor on the corrosion behavior of C1010 steel in 3.5 wt.% NaCl was investigated over 16 days. The corrosion characteristics of the carbon steel was evaluated using linear polarization resistance (LPR) method periodically and using potentiodynamic polarization (PDP) and electrochemical impedance spectroscopy (EIS) at day 16. The inhibitor derived from peony leaves exhibited promising inhibition efficiency of 65.8%, when added at 3 vol.%. This is the first report of a zero-waste process of deriving corrosion inhibitor from organic wastes, enabled by the biological approach. For the peony leaves extract, the main active ingredient is 1-docosanoyl-glycero-3-phosphate that adsorbs onto the steel surface, blocks cathodic active sites, makes the surface hydrophobic, and facilitates the formation of a passive layer on the surface of carbon steel. Upon further optimization, this “green” inhibitor is a promising candidate for formulating long-lasting inhibitor packages.
Xianming Shi, Ph.D., P.E., is an associate professor in the Department of Civil and Environmental Engineering and Director of Laboratory for Advanced & Sustainable Cementitious Materials at WSU. Before he joined WSU, he was a Research Professor at the Civil Engineering Department, MSU and a Program Manager and Senior Research Scientist at the Western Transportation Institute (WTI). He has more than 20 years of experience in conducting engineering and science research. He is an active member of ASCE, ACI, National Association of Corrosion Engineers (NACE), and several expert committees under the TRB. His research has been funded by numerous DOTs and consortia, the U.S. DOT Research and Innovative Technology Administration, National Cooperative Highway Research Program (NCHRP), Airport Cooperative Research Program (ACRP), and the private sector. Dr. Shi is trusted by numerous research sponsors and has provided extensive professional services (NSF invited panelist in 2012; Associate Editor of Innovations in Corrosion and Materials Science; Invited Panel Member/Expert by ACRP, NCHRP, TCRP, and FHWA; Chair and Session Organizer at International Conferences; Chair of TRB Subcommittee; etc.).