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Water Hyacinth: From Threat To Value-added Product Via HTC | 66090
ISSN: 2469-9764

Industrial Chemistry
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Water Hyacinth: from threat to value-added product via HTC

2nd World Conference on Industrial Chemistry and Water Treatment

Silvia Roman, Beatriz Ledesma

University of Extremadura (UEX), Spain

Posters & Accepted Abstracts: Ind Chem

DOI: 10.4172/2469-9764-C1-006

Water Hyacinth (WH, Eichornia crassipes) is universally regarded as one of the more serious world’s invasive plants. Native from the Amazon river basin and introduced as an ornamental plant for water gardens, its rapid spreading has made this plant to be a major weed in many areas such as southern US states from Florida to California. WH tends to form mats on the water surface and can quickly dominate aquatic systems because of fast growing rate. WH causes problems for humans (navigable waterways obstruction, hydroelectric device fouling, blocking of irrigation channels…) and ecosystems (significant deterioration of water quality and severe harm to wildlife). In this work WH (leaves and stem) were subjected to hydrothermal carbonization (HTC) under varying experimental conditions (temperature, time and biomass/water ratio). This process has proven to be a cost effective green route to produce carbonaceous materials and offers many advantages including the possibility of using high moisture materials. The resulting hydrochars were characterized in terms of solid yield (SY, %), Heating Value (HHV, MJ kg-1) and surface properties (porosity, surface morphology and functionalities). It was found that SYs were very low owing to the high moisture content of the biomass (>99%). In general, longer HTC times, lower temperatures and greater biomass loads (even without water addition) involved greater values of SY. Temperature had the highest influence on HTC reactivity, promoting numerous degradation reactions. N2 adsorption analyses at 77 K indicated that all HCs had an incipient porosity, mainly located in the mesopore range, with low values of SBET (20-45 m2 g-1). Moreover, microspheres were observed from SEM analyses, as a result of polymerization of cellulose degradation products. The investigation of this invasive specie is of high interest; these results suggest that WH might be investigated for biofuel applications as well as for other used in the materials field, such as adsorption, energy storage or soil remediation. We are grateful for financial support provided by the Ministry of Economy and Competitiveness (MINECO) via project CTM2016-75937-R

Silvia Román is associate professor at the University of Extremadura (Spain); her teaching includes subjects like technical thermodynamics and thermal engineering. Her research is focused on the use of wastes for energy via thermochemical processes as well as the production of porous materials for several applications. She has published more than 50 scientific papers on these topics and has patent on the production of activated carbon for radioiodine adsorption. During last years, she has been main the researcher of several funded projects on the hydrothermal conversion of biomass. She has recently been awarded with research and teaching recognition prizes such as “Excellence to young researcher career” and “teaching excellence”, both given by the University of Extremadura.

Email: [email protected]