34 documents found, page 1 of 4

Production of kraft pulp from Ochroma pyramidale wood

Volume, biomass and carbon stock in the wood of a dry forest in Caicó Municipal...

The aim of this study was to quantify the stocks in volume, biomass and carbon in wood of a fragment of Caatinga dry forest, in Caicó Municipality, Rio Grande do Norte State, northeastern of Brazil. The inventory and sampling of biological material was carried out for biomass and carbon analysis. Wood density of eight species representing 91% of the importance value (VI) of the fragment was determined to conver...

Oxidized eucalyptus charcoal: a renewable biosorbent for removing heavy metals ...

Use of forest harvest residues: state of the art and opportunities

The present review of literature aimed to present the use of forest harvest wastes as source of biomass, since their generation to the possible end uses. Aimed still, list the main forest species grown in Brazil with potential to produce harvest wastes and, also, address the quantification and qualification of such biomass, and the market trends to their harnessing and utilization as high-value added products. ...

Study of influencing factors in the process of biosorption in batches of Fe3+, ...

Lignocellulosic materials have been studied as possible adsorbents applied in the treatment of effluents containing metallic ions. An example of a material is the Pachira aquatica’s peel, which has favorable characteristics for the biosorption process. The present study aimed to contribute to biosorption studies using the Pachira aquatic, investigating the influencing factors in the biosorption process of Fe3+,...

MECHANICAL CHARACTERIZATION OF A POLYESTER MATRIX COMPOSITE REINFORCED WITH NAT...

The growing demand for renewable products has led to many studies of alternative materials. The present work describes the production of a composite based in polyester resin reinforced with fibers from the climber plant Luffa cylindrica and evaluates its mechanical performance. The composite was produced with two perpendicularly-crossed layers of vegetable fibers. The lamination was performed in a mold with two...

Utilização de resíduos de coco (Cocos nucifera) carbonizado para a produção de ...

O presente trabalho teve como objetivo produzir briquetes com finos de carvão de resíduos de coco e avaliar a qualidade dos briquetes. Cascas de coco foram coletadas no APL de coco em Touros - RN. Após secagem ao ar livre por dois meses, as cascas foram carbonizadas em forno de alvenaria tipo "rabo quente JG" e trituradas em moinho de martelo. O pó resultante foi peneirado, utilizando-se a fração inferior a 40 ...

Potencial energético da madeira de espécies oriundas de plano de manejo florest...

O objetivo do trabalho foi avaliar o potencial energético das madeiras de espécies sob plano de manejo florestal provenientes da região do Seridó, no estado do Rio Grande do Norte. Utilizou-se na pesquisa, madeiras das espécies Jurema-preta, Pereiro, Marmeleiro, Catingueira, Mororó, Imburana, Jurema-branca e Mofumbo, aos 20 anos de idade, originadas da fazenda Dominga no município de Caicó/RN. Foram realizadas ...

Extração por fluido supercrítico de alguns inseticidas carbamatos em amostras d...

Está faltando o mês na data de publicação e na citação. Corrigir; Six supercritical fluid extraction (SFE) methods were tested, by varying the following operational parameters: CO2 pressure, time and temperature of extraction, type and proportion of static modifier, and Hydromatrix®/sample rate into cell. Firstly, insecticide carbamates were extracted from spiked potatoes samples (fortification level of 0,5 mg....

Características físico- químicas e energéticas de duas espécies de ocorrência n...

A vegetação nativa da Região Nordeste vem sendo explorada e utilizada de forma intensiva e de maneira inadequada para finalidades energéticas e nas construções rurais, tornando-se evidente a importância dos conhecimentos relativos às características da madeira. Assim, essa pesquisa teve como objetivo avaliar as características físico-químicas e energéticas da madeira, os rendimentos da carbonização e a caracter...