Toward a New Way for the Valorization of Miscanthus Biomass Produced on Metal-Contaminated Soils Part 1: Mesocosm and Field Experiments

Marie Hechelski, Brice Louvel, Pierrick Dufrénoy, Alina Ghinet and Christophe Waterlot
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Marie Hechelski: Laboratoire de Génie Civil et géo-Environnement, ULR 4515—LGCgE, Université Lille, F-59000 Lille, France
Brice Louvel: Laboratoire de Génie Civil et géo-Environnement, ULR 4515—LGCgE, Université Lille, F-59000 Lille, France
Pierrick Dufrénoy: UCLille, Health & Environment Department, Sustainable Chemistry Team, Laboratoire de Chimie Durable et Santé, JUNIA, Hautes Etudes d’Ingénieur (HEI), 13 rue de Toul, F-59046 Lille, France
Alina Ghinet: UCLille, Health & Environment Department, Sustainable Chemistry Team, Laboratoire de Chimie Durable et Santé, JUNIA, Hautes Etudes d’Ingénieur (HEI), 13 rue de Toul, F-59046 Lille, France
Christophe Waterlot: UCLille, Health & Environment Department, Sustainable Chemistry Team, Laboratoire de Chimie Durable et Santé, JUNIA, Hautes Etudes d’Ingénieur (HEI), 13 rue de Toul, F-59046 Lille, France

Sustainability, 2020, vol. 12, issue 22, 1-18

Abstract: The effects of P-fertilizers (mono- and di-calcium phosphates) on the bioavailability of metals and nutrients in leaves and stems of Miscanthus × giganteus were studied in mesocosm and field experiments in order to propose a new way for the valorization of miscanthus biomass. The concentration of potentially toxic elements was generally higher in stems than in leaves. Although P-fertilizers were added to contaminated soils under sustainable conditions (from 0.022% to 0.026% w / w ), the average of leaf and stem biomass generally increased in the presence of P-fertilizers due to the changes in the speciation of phosphorus. Leaves of the investigated miscanthus may be of great interest as a catalyst in organic chemistry, since the Ca concentration was up to 9000 mg kg −1 DW. Stems represent a potential biomass that can be used as renewable resource of Lewis acids, currently used in organic syntheses (the sum of Zn, Cu, Mn, Fe, Mg, Si and Al was near 1000 mg kg −1 DW). The percentage of Cd and Pb in leaves and stems of miscanthus did not significantly change with P-fertilizers. Depending on the mesocosm and field experiments, it ranged from 0.004% to 0.016% and from 0.009% and 0.034% for Cd in leaves and stems, respectively, and from 0.004% to 0.015% and from 0.009% and 0.033% for Pb in leaves and stems, respectively.

Keywords: miscanthus; metal; fertilizer; soil management (search for similar items in EconPapers)
JEL-codes: O13 Q Q0 Q2 Q3 Q5 Q56 (search for similar items in EconPapers)
Date: 2020
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