Selective extraction of humic acids from an anthropogenic Amazonian dark earth and from a chemically oxidized charcoal

Araújo, Joyce R.; Archanjo, Bráulio S.; Souza, Kátia R. de; Kwapiński, Witold; Falção, Newton Paulo de Souza; Novotny, E. H.; Achete, Carlos A.

doi:10.1007/s00374-014-0940-9

Cited by 90 publications

(66 citation statements)

References 37 publications

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“…In this fraction, the C 1s photoelectron peak was composed of four components (Supplementary Table 10): C1s A in 284.6 eV from aromatic C (C=C); C1s B in 286.2 ± 0.2 eV, which may be assigned to phenol or hydroxyl (C-OH) groups, ether (C-O-C) or pyrrolic (C-N) groups; C 1s C in 287.5 ± 0.4 eV, assigned to carbonyl (C=O) groups; and C 1s D in 289.1 ± 0.3 eV, assigned to the carboxyl (COOH) groups 43,44 .…”

Section: Spectroscopic Insights Into Primingmentioning

confidence: 99%

Biochar built soil carbon over a decade by stabilizing rhizodeposits

Weng¹,

Zwieten

Singh³

et al. 2017

Nature Clim Change

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281

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Biochar can increase the stable C content of soil. However, studies on the longer-term role of plant-soil-biochar interactions and the consequent changes to native soil organic carbon (SOC) are lacking. Periodic 13 CO 2 pulse labelling of ryegrass was used to monitor belowground C allocation, SOC priming, and stabilization of root-derived C for a 15-month period-commencing 8.2 years after biochar (Eucalyptus saligna, 550 • C) was amended into a subtropical ferralsol. We found that field-aged biochar enhanced the belowground recovery of new root-derived C ( 13 C) by 20%, and facilitated negative rhizosphere priming (it slowed SOC mineralization by 5.5%, that is, 46 g CO 2 -C m −2 yr −1 ). Retention of root-derived 13 C in the stable organo-mineral fraction (<53 µm) was also increased (6%, P < 0.05). Through synchrotron-based spectroscopic analysis of bulk soil, fieldaged biochar and microaggregates (<250 µm), we demonstrate that biochar accelerates the formation of microaggregates via organo-mineral interactions, resulting in the stabilization and accumulation of SOC in a rhodic ferralsol.

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Section: Spectroscopic Insights Into Primingmentioning

confidence: 99%

Biochar built soil carbon over a decade by stabilizing rhizodeposits

Weng¹,

Zwieten

Singh³

et al. 2017

Nature Clim Change

Self Cite

281

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“…This correction however assumes that the mass ratio of BPCA/pyrogenic C is constant, which was not properly evaluated for a broad spectrum of charred materials or weathered coal, which is already partially oxidized to aromatic carboxylic acids (Glaser et al, 2002;Kramer et al, 2004;Novotny et al, 2007Novotny et al, , 2009Maia et al, 2011;Linhares et al, 2012;Araujo et al, 2014).…”

Section: Quantification Of Pyrogenic Cmentioning

confidence: 99%

Biochar: Pyrogenic Carbon for Agricultural Use - A Critical Review

Novotny

Maia

Carvalho

et al. 2015

Rev. Bras. Ciênc. Solo

175

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Biochar (carbonized biomass for agricultural use) has been used worldwide as soil amendment and is a technology of particular interest for Brazil, since its "inspiration" is from the historical Terra Preta de Índios (Amazon Dark Earth), and also because Brazil is the world's largest charcoal producer, generating enormous residue quantities in form of fine charcoal and due to the availability of different residual biomasses, mainly from agroindustry (e.g., sugar-cane bagasse; wood and paper-mill wastes; residues from biofuel industries; sewage sludge etc), that can be used for biochar production, making Brazil a key actor in the international scenario in terms of biochar research and utilization). In the last decade, numerous studies on biochar have been carried out and now a vast literature, and excellent reviews, are available. The objective of this paper is therefore to deliver a critical review with some highlights on biochar research, rather than an exhaustive bibliographic review. To this end, some key points considered critical and relevant were selected and the pertinent literature "condensed", with a view to guide future research, rather than analyze trends of the past.

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“…The addition of organic compounds to the soil, such as sewage sludge (Long et al, 2010), biochar (Tang et al, 2013;Schweiker et al, 2014), charcoal, and functionalized charcoal (Jośko et al, 2013), is being studied to reduce the mobility, bioavailability, and toxicity of metals such as Cu and Zn. Functionalized charcoal or biochar is also used as a sorbent in the removal of potentially toxic substances in industrial wastes (Deb et al, 2013) and as a sorbent for contaminant management in soil and water (Ahmad et al, 2014;Rajapaksha et al, 2016) due to characteristics that favor adsorption, such as high specific surface area, pore volume, and CEC (Liu et al, 2007;Linhares et al, 2012;Araujo et al, 2014).…”

Section: Introductionmentioning

confidence: 99%

Functionalized Charcoal as a Buffering Matrix of Copper and Zinc Availability

Guimarães

Giroto

Teixeira

et al. 2018

Rev. Bras. Ciênc. Solo

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High copper (Cu) and zinc (Zn) contents in soil can cause phytotoxicity to plants and contaminate surface and groundwater, with negative effects on agriculture and the environment. Functionalized charcoal (OCh) has high cation exchange capacity (CEC) and the ability to adsorb Cu and Zn and control their availability in the soil and water. An adsorption study at two pH levels was carried out to evaluate increasing Cu and Zn sorption capacity provided by the functionalization process of a charcoal. In addition, a kinetics study of competitive and non-competitive adsorption-desorption of Cu and Zn in OCh was also evaluated. The results showed that functionalized charcoal (Ch) increased CEC 8.7 times due to an increase in carboxyl and phenolic groups, without changing its specific surface area. The Cu and Zn kinetics study showed higher interaction of Cu with the OCh, with total adsorption capacity of 53.1 mg g -1 . From this amount, only 74.9 % was desorbed. However, competitive adsorption with Zn reduced the total amount of Cu adsorbed and decreased the Cu affinity for organic matter. This study shows the potential use of functionalized charcoal for control of Cu and Zn availability in the soil solution.

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Selective extraction of humic acids from an anthropogenic Amazonian dark earth and from a chemically oxidized charcoal

Cited by 90 publications

References 37 publications

Biochar built soil carbon over a decade by stabilizing rhizodeposits

Biochar built soil carbon over a decade by stabilizing rhizodeposits

Biochar: Pyrogenic Carbon for Agricultural Use - A Critical Review

Functionalized Charcoal as a Buffering Matrix of Copper and Zinc Availability

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