Reactions of Biochar in Soil from Modified Redox Properties

A special issue of Agronomy (ISSN 2073-4395).

Deadline for manuscript submissions: closed (30 July 2015) | Viewed by 15387

Special Issue Editor

NSW Department of Primary Industries, 1243 Bruxner Highway, Wollongbar, NSW 2477, Australia
Interests: organic amendments; soil C cycling; biochar systems; N-cycle and emissions of nitrous oxide; soil function and impact of agricultural inputs
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Special Issue Information

Dear Colleagues,

Research over the last 5 years has established that biochars are redox active in soil, and that they are involved in numerous electron-shuttling reactions. These reactions are important in facilitating the modification of soil physical, biological, and chemical properties that impact soil fertility and structure, greenhouse gas emissions, contaminants, and agricultural productivity. This Special Issue calls for manuscripts that provide evidence to improve our mechanistic understanding of the redox reactions facilitated by biochar amendment. In particular, papers that explore the role of redox active minerals on the surface of biochar are encouraged.

Dr. Lukas Van Zwieten
Guest Editor

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Keywords

  • biochar
  • redox
  • electron shuttling
  • soil properties

Published Papers (1 paper)

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Review

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Review
The Electrochemical Properties of Biochars and How They Affect Soil Redox Properties and Processes
by Stephen Joseph, Olivier Husson, Ellen Ruth Graber, Lukas Van Zwieten, Sara Taherymoosavi, Torsten Thomas, Shaun Nielsen, Jun Ye, Genxing Pan, Chee Chia, Paul Munroe, Jessica Allen, Yun Lin, Xiaorong Fan and Scott Donne
Agronomy 2015, 5(3), 322-340; https://doi.org/10.3390/agronomy5030322 - 21 Jul 2015
Cited by 123 | Viewed by 14940
Abstract
Biochars are complex heterogeneous materials that consist of mineral phases, amorphous C, graphitic C, and labile organic molecules, many of which can be either electron donors or acceptors when placed in soil. Biochar is a reductant, but its electrical and electrochemical properties are [...] Read more.
Biochars are complex heterogeneous materials that consist of mineral phases, amorphous C, graphitic C, and labile organic molecules, many of which can be either electron donors or acceptors when placed in soil. Biochar is a reductant, but its electrical and electrochemical properties are a function of both the temperature of production and the concentration and composition of the various redox active mineral and organic phases present. When biochars are added to soils, they interact with plant roots and root hairs, micro-organisms, soil organic matter, proteins and the nutrient-rich water to form complex organo-mineral-biochar complexes Redox reactions can play an important role in the development of these complexes, and can also result in significant changes in the original C matrix. This paper reviews the redox processes that take place in soil and how they may be affected by the addition of biochar. It reviews the available literature on the redox properties of different biochars. It also reviews how biochar redox properties have been measured and presents new methods and data for determining redox properties of fresh biochars and for biochar/soil systems. Full article
(This article belongs to the Special Issue Reactions of Biochar in Soil from Modified Redox Properties)
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