Elsevier

Pedosphere

Volume 25, Issue 5, October 2015, Pages 680-685
Pedosphere

Comparative Assessment of the Effect of Wastewater Sludge Biochar on Growth, Yield and Metal Bioaccumulation of Cherry Tomato

https://doi.org/10.1016/S1002-0160(15)30048-5Get rights and content

Abstract

To investigate the potential effects of wastewater sludge and sludge biochar on growth, yield and metal bioaccumulation of cherry tomato (Lycopersicon esculentum L.), a pot experiment was carried out under greenhouse environment with three different treatments, control soil (CP), soil with wastewater sludge (SS) and soil with sludge biochar (SB), to reveal the comparative effect between the amendments of wastewater sludge and sludge biochar. The soil used for pot experiment was Chromosol. Wastewater sludge and sludge biochar produced through pyrolysis process at 550 °C were applied at 10 t ha−1. No significant difference was found in growth and production of cherry tomatoes between wastewater sludge and sludge biochar applications to the soil. The accumulation rates of metals in the fruits were lower in the treatment with sludge biochar than in the treatment with wastewater sludge. The study highlights the benefits of risk mitigation from toxic metal accumulation in fruits using wastewater sludge and sludge biochar as soil conditioners.

References (38)

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    Citation Excerpt :

    Fornes et al. (2017), in their experiments, found that the addition of biochar from forest waste and olive mill waste at low rates (10%, 25% v/v) increased nutrients such as N, P, and K, while, when they raised the doses (50%, 75%, 100% v/v) the concentrations of N, P and K decreased. Moreover, the application of biochar from sewage sludge at 10 t ha−1 led to a reduction of Cu concentration (Hossain et al., 2015). Only two heavy metals and one trace element were detected in the fruits of tomato, As, Mo, and Pb, and they were below the permissible limits for vegetables, according to the FAO/WHO (1984) and Annon (1987).

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