Environmental impact of combustion of ethanolic biodiesel/diesel blends from several feedstocks on the gas emission levels in the atmosphere

Pinheiro, Torquato Ferreira; Castro, Maria Priscila Pessanha de; Pérez, Víctor Haber; Silveira, Eurípedes Garcia; Sthel, Marcelo Silva; Silva, Marcelo Gomes da

doi:10.1007/s11356-019-05212-z

Cited by 7 publications

(2 citation statements)

References 40 publications

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“…In our study, the first ones had a higher pH, with an average value of 6.73 and 6.21 for aridisol and entisol, respectively. A similar result was found by [29] in the province of San Juan, Argentina.…”

Section: Figuresupporting

confidence: 86%

Transfer of Heavy Metals in Northeast Brazil's Topsoils: Insights from Sequential Extraction and Statistical Tools

Fernández,

Júnior,

Amaral

et al. 2024

Preprint

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This study aimed to evaluate the distribution and mobility of trace metals (Pb, Cu, Cd, Cr, Ni, Zn) in surface soils of Pernambuco state, Northeast Brazil, applying sequential extraction techniques defined by the Community Bureau of Reference (BCR) and complemented by statistical analysis through Principal Component Analysis (PCA) and Pearson correlation matrix. Analysis of fifty topsoil samples showed that most metals predominantly reside in the residual fraction. However, Cd, Ni, and Zn were significantly present in the mobile fraction. Cd and Pb were closely associated with iron and manganese oxides, indicating their potential mobility within environmental matrices. Cu, however, was primarily detected under oxidising conditions in the residual fraction. PCA revealed a positive correlation of soil pH with Ni, Cu, and Cr and a negative correlation with Zn, Cd, and Pb. Factors such as organic matter and soil texture also play significant roles in influencing the mobility of these metals. The study highlights significant variances across different soil classes, underscoring the complex nature of soil chemistry. These findings emphasise the importance of sequential extraction and PCA in assessing metal solubility and availability, which is crucial for effective environmental management and agricultural practices.

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Section: Figuresupporting

confidence: 86%

Transfer of Heavy Metals in Northeast Brazil's Topsoils: Insights from Sequential Extraction and Statistical Tools

Fernández,

Júnior,

Amaral

et al. 2024

Preprint

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“…In photoacoustic sensors, however, the absorbed light is directly measured (Hodgkinson & Tatam, 2013 ), ensuring greater sensitivity. Already consolidated in science, photoacoustics has been used to detect gases (according to the radiation source used) and different applications (Bueno et al, 2015 ; Corrêa, 2011 ; Filho et al, 2008 ; Linhares et al, 2019 ; Pereira et al, 2009 ; Pinheiro et al, 2019 ; Schmohl et al, 2002 ; da Silva et al, 2003 ; Sthel et al, 2011 , 2012 ; Webber et al, 2005 ). Nonetheless, photoacoustics combined with the use of QW-DFB lasers as a radiation source is a novelty at monitoring NH employed to indoor gas samples from broiler raising in Brazil, in which electrochemical and simple commercial infrared sensors are generally used—as the Chillgard RT—which tend to have lower selectivity and accuracy (Li et al, 2015 ).…”

Section: Introductionmentioning

confidence: 99%

Monitoring of ammonia concentrations from coir-husk litter of Brazilian poultry house using diode laser photoacoustic spectroscopy

Linhares

Torres-Cordido

Sthel

et al. 2022

Environ Monit Assess

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Ammonia (NH ) from manure is a concern in raising broiler due to possible damages to production and the environment. Brazil is the main exporter of chicken meat in the world and is also responsible for large waste of poultry litter. The country, likewise, figures as top 5 producers of green coconut, which results in considerable volumes of waste, since 80%-85% of the fruit is unusable. This work analyzes the ammonia concentration profile of two bedding substrates for raising broiler, to know, coir-husk fiber and a commonly used pine wood shavings in a Brazilian climate. A differential home-made photoacoustic cell combined with a diode laser was employed for sensing ammonia at trace levels. Such combination confers selectivity as well as lower limits of detection to the system. The chemical compositions pH, N, C, Ca, Mg, P O and K O were also determined, in addition to the moisture, dry matter and mineral content of substrates and litters. NH concentrations varied from (0.9 ± 0.3) ppmv to (19 ± 3) ppmv and from (2.1 ± 0.5) ppmv to (21 ± 3) ppmv for the coir-husk fiber and wood shavings substrates, respectively. Results showed the feasibility of using coconut fiber as poultry litter in regions where this material is a common waste. Moreover, as NH concentrations were lower for coconut fiber bedding compared to shavings, this coir-husk fiber is a potential residue to guarantee the environmental sustainability by Brazilian poultry farming. Coir-husk fibers presented significantly higher amounts of P and K in comparison to pine wood. NH profiles revealed that coir-husk fiber emitted lower quantities than wood shavings. Besides, a delay on the NH emission pattern was clearly seen when the coconut waste was the bedding material. Such a tendency was confirmed by the logistic model. Our findings, in turn, make the coir-husk an environmentally friendly alternative low-cost product for poultry litter as well as its potential use as natural fertilizer. The later deserves attention since there is a need to accurately assess the emissions of methane, nitrous oxide, and carbon dioxide during the composting process. In Brazil, the waste generated by the high production of green coconut is an environmental liability. The cost of poultry production has been high, reducing the profit of producers, who seek to make production cheaper. Measuring NH from poultry activity in Brazil, a tropical country, aims to control management and reduce production losses, since NH is a harmful gas to birds. The measurement of NH concentrations at trace levels from raising broilers by photoacoustic diode laser spectroscopy, to the best of our knowledge, has been reported for the very first time.

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Non-edible Oil Plants for Biodiesel Production

Silveira

Souza

Pérez

et al. 2022

Clean Energy Production Technologies

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Environmental impact of combustion of ethanolic biodiesel/diesel blends from several feedstocks on the gas emission levels in the atmosphere

Cited by 7 publications

References 40 publications

Transfer of Heavy Metals in Northeast Brazil's Topsoils: Insights from Sequential Extraction and Statistical Tools

Transfer of Heavy Metals in Northeast Brazil's Topsoils: Insights from Sequential Extraction and Statistical Tools

Monitoring of ammonia concentrations from coir-husk litter of Brazilian poultry house using diode laser photoacoustic spectroscopy

Non-edible Oil Plants for Biodiesel Production

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