Biochar produced from Amazonian agro-industrial wastes: properties and adsorbent potential of Cd2+ and Cu2+

Dias, Yan Nunes; Souza, Edna Santos de; Costa, Hercília Samara Cardoso da; Melo, Leônidas Carrijo Azevedo; Penido, Evanise Silva; Amarante, Cristine Bastos do; Teixeira, Orivan Maria Marques; Fernandes, Antônio Rodrigues

doi:10.1007/s42773-019-00031-4

Cited by 31 publications

(13 citation statements)

References 68 publications

(92 reference statements)

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“…The biochar yield of 27.8% means that, considering the production conditions used, for each 100 kg of açaí seeds, 27.8 kg of biochar can be produced. This is in agreement with Dias et al (2019) who tested the rate of biochar production under similar conditions and temperatures for different sources of biomass characteristic of the Amazon region, including açaí seeds (25.4% at 400 °C). The alternative kiln used here for the production of biochar proved to be efficient, since the production rates are similar to those of Sato et al (2019) under laboratory conditions.Considering the municipality of Belém in Brazil, with about 3000 establishments that process and sell fruit pulp, the daily demand is around 440 tons of the fruit in natura.…”

Section: Characteristics Of Açaí Seeds In Nature and After Pyrolysissupporting

confidence: 91%

Biochar as a sustainable alternative to açaí waste disposal in Amazon, Brazil

Sato

Lima

Costa

et al. 2020

Process Safety and Environmental Protection

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The açaí palm (Euterpe oleracea Mart) is native to the floodplains of central and South America and is cultivated in Brazil for its berries, which are considered to be a 'superfood'. The waste açaí fiber and seeds obtained after fruit processing pose a challenge since they remain unutilised despite being an abundant waste by-product of açaí processing.This leads to a build-up of waste, regular dumping and environmental management challenges. Here we examine the potential use of açaí seed biochar as a soil conditioner. The biochar was produced from waste seeds in a handmade kiln, incorporated into two soils of different textures and then compacted in volumetric rings with a hydraulic press. The samples were kept in a greenhouse for a 270-day incubation period. After this, the samples were evaluated for their soil physical and chemical attributes. Nine months after the application of the açaí seed biochar, soil physical properties were not affected, except for the soil aggregate size distribution, for which the highest dosage resulted in a larger weighted average diameter. However, biochar increased phosphorus, potassium and magnesium contents, and reduced the aluminum content, which was reflected in an increase of the base saturation and a reduction in aluminum saturation. Therefore, within a relatively short time period, the biochar was found to improve soil chemical quality more so than soil physical properties, thus offering potential as a sustainable solution to manage açaí waste in the Amazon region.

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Section: Characteristics Of Açaí Seeds In Nature and After Pyrolysissupporting

confidence: 91%

Biochar as a sustainable alternative to açaí waste disposal in Amazon, Brazil

Sato

Lima

Costa

et al. 2020

Process Safety and Environmental Protection

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“…Dias et al. (2019) evaluated the adsorbent potential of Cd 2+ and Cu 2+ by Brazil nut, açai, and palm kernel waste‐based biochars. The highest adsorption capacities were observed in biochars produced at the highest pyrolysis temperatures (700°C).…”

Section: Applications Of Brazil Nut Wastes In the Literaturementioning

confidence: 99%

Sustainable applications of lignocellulosic residues from the production of Brazil nut in the Peruvian Amazon

Torres¹,

Gonzales²,

Troncoso³

et al. 2021

Environmental Quality Mgmt

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Brazil nut is one of the main non-timber products from the Amazonia that are traded in the international market. Up to 85% of the Brazil nut weight corresponds to the inedible wooden pericarp and shell, thus generating large amounts of lignocellulosic waste during cultivation and production. However, lignocellulosic wastes, such as Brazil nut husk and seed shells, are suitable raw materials for a variety of industrial applications, including the production of activated carbon, ecoplastic composites, composting, biochar, construction materials, plant substrates, and soil remediation techniques.Here, we reviewed the academic literature exploring the properties of Brazil nut-waste materials and their applications in multiple industries. Brazil nut waste is presented as an overlooked source of lignocellulosic materials with great potential in the materials science industry.

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“…The raw material used for biochar production is also one of the factors that can impart a lower P sorption capacity to biochar because, together with the pyrolysis temperature, it determines the formation of surface charges (Vandecasteele et al, 2017). This same type of biochar was evaluated by Dias et al (2019), who found a lower adsorption capacity than that of biochar produced from materials such as kernel and Brazil nutshells. Another factor related to lower P sorption is the presence of coexisting ions, which reduce P retention through competition (Ngatia et al, 2019).…”

Section: Influence Of Açaí Biochar and Compost On The Sorption And Desorption Of Pmentioning

confidence: 99%

Biochar and conventional compost reduce hysteresis and increase phosphorus desorbability in iron mining waste

Guedes¹,

Pinto²,

Ramos³

et al. 2021

Revista Brasileira De Ciência Do Solo

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Phosphorus (P) fixation in the soil reduces the utilization of this element by plants and can be one of the main problems for fertilization management in soils containing Fe oxides. As a strategy to minimize the effects of P retention, organic materials, such as biochar or commercial composts, may be useful tools to maintain P availability and delay immobilization of this element in the soil, thereby benefiting, for example, the rehabilitation of areas impacted by Fe mining. The objective of this study was to evaluate the kinetics of P sorption and desorption and the hysteresis index in red mining waste from Fe mining subjected to açaí biochar and commercial compost amendments. Therefore, a substrate collected from Fe mining waste piles in the Carajás Mineral Province was incubated for 30 days with açaí biochar, commercial compost, and açaí biochar + commercial compost at a ratio of 90 % mining waste and 10 % organic amendment (w/w). The P sorption and desorption kinetics were evaluated in a solution containing 10 mg L -1 P at times from 0.5 to 48 h; the data were modeled according to a pseudo-first-order equation considering two types of reaction sites, and the hysteresis index was obtained by the difference between the sorption and desorption isotherms. Treatment of the mining substrate with açaí biochar reduced P sorption, while P desorption was increased by up to 60 % by applying biochar and/or commercial compost. Açaí biochar also reduced the hysteresis of P sorption from 78 to 54.8 %, in addition to slowing P fixation in this substrate. Thus, this study showed that açaí biochar and commercial compost may maximize the benefits of phosphate fertilization during the rehabilitation of areas impacted by Fe mining. However, as these composts can cause different effects on P dynamics in mining waste, their effects on other elements, such as micronutrients, whose availability may be affected, are important to be evaluated.

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Biochar produced from Amazonian agro-industrial wastes: properties and adsorbent potential of Cd2+ and Cu2+

Cited by 31 publications

References 68 publications

Biochar as a sustainable alternative to açaí waste disposal in Amazon, Brazil

Biochar as a sustainable alternative to açaí waste disposal in Amazon, Brazil

Sustainable applications of lignocellulosic residues from the production of Brazil nut in the Peruvian Amazon

Biochar and conventional compost reduce hysteresis and increase phosphorus desorbability in iron mining waste

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