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首页> 外文会议>International Conference on Solid Waste Technology and Management >Testing of two mineral amended composts for remediation of heavy metal contaminated soil: metal immobilisation and performance of ryegrass
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Testing of two mineral amended composts for remediation of heavy metal contaminated soil: metal immobilisation and performance of ryegrass

机译：两种矿物修正的堆肥用于修复重金属污染土壤：金属固定化和黑麦草的性能

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Many former industrial sites often contain elevated concentrations of contaminants including heavy metals. Compost is often proposed as a suitable material for the remediation of contaminated brownfield sites, vitalising the soil but also for its reported immobilisation of heavy metals. Through this immobilisation the contaminant receptor linkage pathway will be broken and the toxicity of the soil will be reduced. Some inorganic soil amendments do also immobilise heavy metals. In our research we have examined the usage of two composts enriched with up to 20% of bentonite or zeolite to increase the immobilising behaviour of the composts. The two composts were composted garden waste and composted sewage sludge. Results show that the composted greenwaste reduced the leaching of metals from contaminated soil efficiently while composted sewage sludge increased leaching. In contradiction however, composted sewage sludge improved the growth of ryegrass most effective and also reduced metal uptake into the grass leaves better than the composted greenwaste. Results also indicate that the additional effect of the minerals to the compost is limited.
机译：许多前工业部位通常含有高浓度的污染物，包括重金属。堆肥通常被提出为修复受污染的棕色田地场的合适材料，促进土壤，但也为其报告的重金属的固定。通过这种固定化，污染物受体连接途径将破裂，土壤的毒性将减少。一些无机土壤修正案也可以固定重金属。在我们的研究中，我们研究了富含20％膨润土或沸石的两种堆肥的用法，以增加堆肥的固定行为。这两个堆肥是堆肥花园废物和堆肥污水污泥。结果表明，堆肥的绿色废物有效地降低了污染土壤中金属的浸出，而堆肥污泥增加了浸出。然而，在矛盾的情况下，堆肥污水污泥提高了黑麦草的生长，最有效，并且还比堆肥的绿色废存更好地降低到草叶中的金属吸收。结果还表明，矿物对堆肥的额外效果有限。

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