Inertization of metals and hydrogen production as a byproduct from water hyacinth and water lettuce via plasma pyrolysis.

ABSTRACT: Water hyacinth and water lettuce have been extensively used for phytoremediation of metals and metalloids. However, the reasonable disposal of phytoremediation plants is a difficult problem. This study aims to reduce metals and metalloids from water hyacinth and water lettuce, and produce hydrogen (H₂) and methane (CH₄) via an atmospheric-pressure microwave plasma reactor based on the circular economy concept. Inertization of metals and metalloids can be obtained by more than 60% for both water hyacinth and water lettuce. H₂ and CH₄ production of water hyacinth and water lettuce were 56.28%/57.30% and 3.75%/2% of volume fractions, respectively. Furthermore, total VOCs concentrations from the effluent gas were detected only at the values of 0.511% (water hyacinth) and 0.08% (water lettuce) of volume fractions, respectively. Overall, water hyacinth and water lettuce treated by atmospheric-pressure microwave plasma showed the potential of H₂ and CH₄ production as a by-product for alternative energy and inertization of metals/metalloids for the phytoremediation plants.

SUBMITTER: Sanito RC 

PROVIDER: S-EPMC9636479 | biostudies-literature | 2022 Nov

REPOSITORIES: biostudies-literature