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Field evaluation of industrial non-food crops for phytomanaging a metal-contaminated dredged sediment. | LitMetric

AI Article Synopsis

  • Phytomanagement integrates phytotechnologies and non-food biomass production for a sustainable circular economy by utilizing specific crops to manage metal-contaminated sediments.
  • The study evaluated ten non-food crops for their ability to handle metals like Cd, Cu, Pb, and Zn in contaminated soil, proposing various end-products such as biogas and bioethanol for their biomass.
  • Although eight crops showed excluder behavior (BCF < 1) indicating limited metal transfer, they did not significantly alter metal mobilities, leading to a proposed ranking method for assessing their effectiveness based on metal toxicity and yield impact.

Article Abstract

Phytomanagement is a concept fit for a bio-based circular economy that combines phytotechnologies and biomass production for non-food purposes. Here, ten annual and perennial industrial non-food crops (Sorghum Biomass 133, Sorghum Santa Fe red, Linum usitatissimum L., Eucalyptus sp., Salix Inger, Salix Tordis, Beta vulgaris L., Phacelia tanacetifolia Benth., Malva sylvestris L., and Chenopodium album L.) were studied under field conditions for phytomanaging a metal (Cd, Cu, Pb, and Zn)-contaminated dredged sediment in the North of France. The crops were selected according to their relevance to pedoclimatic and future climatic conditions, and one or more non-food end-products were proposed for each plant part collected, such as biogas, bioethanol, compost, natural dye, ecocatalyst, and fiber. Based on the soil-plant transfer of metals, eight out of the crops cultivated on field plots exhibited an excluder behavior (bioconcentration factor, BCF < 1), a trait suitable for phytostabilization. However, these crops did not change the metal mobilities in the dredged sediment. The BCF < 1 was not sufficient to characterize the excluder behavior of crops as this factor depended on the total dredged-sediment contaminant. Therefore, a BCF group ranking method was proposed accounting for metal phytotoxicity levels or yield decrease as a complemental way to discuss the crop behavior. The feasibility of the biomass-processing chains was discussed based on these results and according to a survey of available legislation in standard and scientific literature.

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Source
http://dx.doi.org/10.1007/s11356-022-24964-9DOI Listing

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