John Wiley & Sons, Ltd.

Effect of activated carbon or biochars on toxicity of different soils contaminated by mixture of native polycyclic aromatic hydrocarbons and heavy metals

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Activated carbon (AC) and biochars (BCS and BCW) were added to the soils sampled from areas of strong anthropogenic influence at doses of 0.5, 1, 2.5 or 5% (w/w) and incubated for two months. At the end of this period, the toxicity of the soils was measured. The effect of AC and biochars on the toxicity of the soils varied based on soil, type of amendment, dose and test organism. For most of the parameters tested, the highest effectiveness of AC in terms of reduction of toxicity was observed in soil POPI. In the case of the remaining soils, after the addition of AC varied results were observed, in which a reduction or an increase of toxicity, relative to the control soil, occurred. As in the case of AC, biochars also caused a significant reduction of phytotoxicity of soil POPI. In soils KB and KOK the reduction/increase of toxicity depended on biochar dose. Compared to the biochars, the effectiveness of AC in the reduction of toxicity depended also on soil, type of amendment, dose and test organism. Generally, the AC was more effective than biochars in relation to mortality and reproduction of F. candida (in all soils) and for reduction of luminescence inhibition of V. fischeri (in POPI soil). This article is protected by copyright. All rights reserved

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