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Ecotoxicology and environmental safety v.147, 2018년, pp.86 - 92   SCI SCIE
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Long term growth of crop plants on experimental plots created among slag heaps

Halecki, Wiktor (Corresponding author. ); Klatka, Sławomir ( );
  • 초록  

    Abstract Suppression of plant growth is a common problem in post-mining reclaimed areas, as coarse texture of soils may increase nitrate leaching. Assessing feasibility of using solid waste (precipitated solid matter) produced by water and sewage treatment processes in field conditions is very important in mine soil reclamation. Our work investigated the possibility of plant growth in a degraded site covered with sewage-derived sludge material. A test area (21m × 18m) was established on a mine soil heap. Experimental plant species included Camelina sativa, Helianthus annuus, Festuca rubra , Miscanthus giganteus, Amaranthus cruentus, Brassica napus, Melilotus albus , Beta vulgaris, and Zea mays. ANOVA showed sufficient water content and acceptable physical properties of the soil in each year and layer in a multi-year period, indicating that these species were suitable for phytoremediation purposes. Results of trace elements assays indicated low degree of contamination caused by Carbocrash waste material and low potential ecological risk for all plant species. Detrended correspondence analysis revealed that total porosity and capillary porosity were the most important variables for the biosolids among all water content related properties. Overall, crop plants were found useful on heavily degraded land and the soil benefited from their presence. An addition of Carbocrash substrate to mine soil improved the initial stage of soil reclamation and accelerated plant growth. The use of this substrate in phytoremediation helped to balance the content of nutrients, promoted plant growth, and increased plant tolerance to salinity. Sewage sludge-amended biosolids may be applied directly to agricultural soil, not only in experimental conditions. Highlights Sewage sludge amendments are important to produce a highly efficient substrate for soil reclamation. The material used in our study for biological reclamation improves the water content properties of the post-mining soil. Crop plants can be planted on degraded land following application of suitably prepared sewage sludge. Crop plants proved phytoextraction capacity, enabling removal of trace elements from the substrate and reducing salinity. Degraded land should be reclaimed with material that inhibits migration of trace elements from the substrate to plants. Graphical abstract [DISPLAY OMISSION]


  • 주제어

    Biosolids .   Post-mining area .   Reclaimed land .   Reuse of material .   Phytoremediation .   Trace elements.  

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