Structural and elemental analysis of biochars in the search of a synthetic path to mimetize anthropic Amazon soils

Pandey, Sugandha Dogra; Mendonça, Fernanda G.; Rodrigues, Marcio Neves; Faria, Beatriz P.Z.; Campos, João Luiz; Noronha, Igor F.P.C.; Vieira, Sara S.; Santos, Nadiene A.V.; Fernandes, Luiz Arnaldo; Sampaio, Regynaldo Arruda; Colen, Fernando; Magriotis, Zuy M.; Jório, Ado

doi:10.1016/j.jenvman.2020.111685

Cited by 5 publications

(3 citation statements)

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“…On the other hand, according to Ahmad et al [ 21 ], the O/C ratio represents the biochar’s moisture content and hydrophilicity. Long-chain organic molecules like lignin and cellulose are responsible for high carbon and oxygen content [ 22 ]. Figure S1 and Table S1 provide further details on the van Krevelen plot and the inorganic components of the biochar, respectively, in the Supplementary Information .…”

Section: Resultsmentioning

confidence: 99%

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Valorization of Spent Vetiver Roots for Biochar Generation

Neve,

Sarkar,

Warke

et al. 2023

Molecules

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Vetiver root is widely used to produce essential oils in the aromatherapy industry. After the extraction of oil, the roots are disposed of as waste. The central objective of this research was to explore the conversion of this waste into a resource using a circular economy framework. To generate biochar, vetiver roots were pyrolyzed at different temperatures (300, 500, and 700 °C) and residence times (30, 60, and 120 min). Analysis showed the root biochar generated at 500 °C and held for 60 min had the highest surface area of 308.15 m2/g and a yield of 53.76%, in addition to other favorable characteristics. Comparatively, the surface area and the yield of shoot biochar were significantly lower compared to those of the roots. Repurposing the spent root biomass for environmental and agronomic benefits, our circular economy concept prevents the plant tissue from entering landfills or the waste stream.

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Section: Resultsmentioning

confidence: 99%

“…An enhanced SEM image with higher magnification is presented in the Supplementary Material . This kind of construction can enhance structurally and retain soil nutrients [ 22 ]. A comparison of the SEM images revealed that thermal treatment caused morphological changes as the porosity appeared to increase along with the pyrolysis temperature.…”

Section: Resultsmentioning

confidence: 99%

Valorization of Spent Vetiver Roots for Biochar Generation

Neve,

Sarkar,

Warke

et al. 2023

Molecules

View full text Add to dashboard Cite

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“…Biochar (BC) is a solid product obtained from different types of vegetable biomass or organic waste through a thermal convection process, in the absence or limited presence of oxygen [111,112]. The origins of BC can be traced back to the Amazon, where numerous sites known as "Terra Preta dos Indios" have been identified, where biochar was buried to increase their crops [113][114][115].…”

Section: Biocharmentioning

confidence: 99%

A Review on the Removal of Carbamazepine from Aqueous Solution by Using Activated Carbon and Biochar

et al. 2021

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Carbamazepine (CBZ), one of the most used pharmaceuticals worldwide and a Contaminant of Emerging Concern, represents a potential risk for the environment and human health. Wastewater treatment plants (WWTPs) are a significant source of CBZ to the environment, polluting the whole water cycle. In this review, the CBZ presence and fate in the urban water cycle are addressed, with a focus on adsorption as a possible solution for its removal. Specifically, the scientific literature on CBZ removal by activated carbon and its possible substitute Biochar, is comprehensively scanned and summed up, in view of increasing the circularity in water treatments. CBZ adsorption onto activated carbon and biochar is analyzed considering several aspects, such as physicochemical characteristics of the adsorbents, operational conditions of the adsorption processes and adsorption kinetics and isotherms models. WWTPs usually show almost no removal of CBZ (even negative), whereas removal is witnessed in drinking water treatment plants through advanced treatments (even >90%). Among these, adsorption is considered one of the preferable methods, being economical and easier to operate. Adsorption capacity of CBZ is influenced by the characteristics of the adsorbent precursors, pyrolysis temperature and modification or activation processes. Among operational conditions, pH shows low influence on the process, as CBZ has no charge in most pH ranges. Differently, increasing temperature and rotational speed favor the adsorption of CBZ. The presence of other micro-contaminants and organic matter decreases the CBZ adsorption due to competition effects. These results, however, concern mainly laboratory-scale studies, hence, full-scale investigations are recommended to take into account the complexity of the real conditions.

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