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Article

Using Phosphorus-Rich Biochars to Remediate Lead-Contaminated Soil: Influence on Soil Enzymes and Extractable P

1
School of Engineering, RMIT University, GPO Box 2476, Melbourne 3001, Australia
2
Department of Agricultural Production, Technical University of Madrid, Ciudad Universitaria, 28040 Madrid, Spain
3
Department of Geological and Mining Engineering, Technical University of Madrid, 28040 Madrid, Spain
4
South East Water Corporation, Waters Edge, 101 Wells Street, Frankston 3199, Australia
*
Author to whom correspondence should be addressed.
Agronomy 2020, 10(4), 454; https://doi.org/10.3390/agronomy10040454
Received: 29 February 2020 / Revised: 20 March 2020 / Accepted: 22 March 2020 / Published: 25 March 2020
(This article belongs to the Special Issue Soil Quality Evaluation Using Biological Properties)
In recent times, there has been increased focus on a holistic approach to soil remediation with consideration of social, economic and environmental factors. Consequently, there is a demand from practitioners and regulators alike for suitable ways to measure ancillary outcomes, for example, effects on soil quality. Here we show that biochar, when applied to land to remediate lead (Pb)-contaminated soils, can lead to environmental improvements not realized by adding mined or manufactured phosphates. Here, we study a Pb-contaminated soil amended with two phosphate fertilizers (slow- and fast-release) and with biochars produced from poultry litter and from biosolids at three temperatures (300 °C, 400 °C and 500 °C). The results show that, unlike the fast-release P fertilizer, biochars did not result in an increase in the amount of leachable P that could be released into the environment. Biochars prepared at 500 °C presented a higher value of the integrative geometric mean of soil enzyme activity, compared to the P fertilizers. Overall, our research shows that biochars, particularly those prepared at the higher temperature tested, are a suitable alternative to P fertilizers as an integrative remediation strategy in Pb-contaminated soils, enabling soil biological restoration. View Full-Text
Keywords: Biochar; soil quality; lead pollution; lead remediation; soil enzymes Biochar; soil quality; lead pollution; lead remediation; soil enzymes
MDPI and ACS Style

Netherway, P.; Gascó, G.; Méndez, A.; Surapaneni, A.; Reichman, S.; Shah, K.; Paz-Ferreiro, J. Using Phosphorus-Rich Biochars to Remediate Lead-Contaminated Soil: Influence on Soil Enzymes and Extractable P. Agronomy 2020, 10, 454. https://doi.org/10.3390/agronomy10040454

AMA Style

Netherway P, Gascó G, Méndez A, Surapaneni A, Reichman S, Shah K, Paz-Ferreiro J. Using Phosphorus-Rich Biochars to Remediate Lead-Contaminated Soil: Influence on Soil Enzymes and Extractable P. Agronomy. 2020; 10(4):454. https://doi.org/10.3390/agronomy10040454

Chicago/Turabian Style

Netherway, Pacian, Gabriel Gascó, Ana Méndez, Aravind Surapaneni, Suzie Reichman, Kalpit Shah, and Jorge Paz-Ferreiro. 2020. "Using Phosphorus-Rich Biochars to Remediate Lead-Contaminated Soil: Influence on Soil Enzymes and Extractable P" Agronomy 10, no. 4: 454. https://doi.org/10.3390/agronomy10040454

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