Phytoremediation-biorefinery tandem for effective clean-up of metal contaminated soil and biomass valorisation

Maria Sotenko, Stuart Coles, Guy Barker, Lijiang Song, Ying Jiang, Philip Longhurst, Tamara Romanova, Olga Shuvaeva, Kerry Kirwan

    Research output: Contribution to journalArticlepeer-review

    2 Citations (Scopus)

    Abstract

    During the last few decades, phytoremediation process has attracted much attention because of the growing concerns about the deteriorating quality of soil caused by anthropogenic activities. Here, a tandem phytoremediation/biorefinery process was proposed as a way to turn phytoremediation into a viable commercial method by producing valuable chemicals in addition to cleaned soil. Two agricultural plants (Sinapis alba and Helianthus annuus) were grown in moderately contaminated soil with ca. 100 ppm of Ni and further degraded by a fungal lignin degrader—Phanerochaete chrysosporium. Several parameters have been studied, including the viability of plants, biomass yield, and their accumulating and remediating potentials. Further, downstream processing showed that up to 80% of Ni can be easily extracted from contaminated biomass by aqueous extraction at mild conditions. Finally, it was demonstrated that the growth of plants on the contaminated soil could be degraded by P. chrysosporium, and the effect of nickel and biomass pretreatment on the solid-state fermentation was studied. The proposed and studied methodology in this work could pave the way for successful commercialization of the phytoremediation process in the near future.

    Original languageEnglish
    Pages (from-to)965-975
    Number of pages11
    JournalInternational Journal of Phytoremediation
    Volume19
    Issue number11
    DOIs
    Publication statusPublished - 2 Nov 2017

    Keywords

    • biorefinery
    • lignocellulose degradation
    • metal accumulating plants
    • nickel
    • Phanerochaete chrysosporium
    • phytoremediation

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