Emprego do carvão ativado para remoção de cobre em cachaça
TL;DR: In this paper, a sugarcane spirit with 9 mg L-1 of copper was shaken with 2 to 26 g of activated carbon, during 10 to 1440 minutes, and the copper and organic compounds were measured.
Abstract: Copper content is of great concern among sugarcane-spirit producers. It is released from copper-made distillers, during the distillation process. Activated carbon has been used to remove copper. However, depending on the amount of carbon and the duration of reaction, it can also remove higher alcohols and esters, which are important in the final product. A sugarcane spirit with 9 mg L-1 of copper was shaken with 2 to 26 g L-1 of activated carbon, during 10 to 1440 minutes. Then, copper and organic compounds were measured. At least 12 g L-1 of carbon and 60 min shaking time were necessary to decrease copper bellow 5 mg L-1. However, other components of the product were also affected.
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TL;DR: In this paper, the chemical modification of natural dry babassu coconut ( Orbignya speciosa ) mesocarp (BM), using a quasi solvent-free procedure in which the precursor was added to molten succinic (S), maleic (M) or phthalic (P) anhydrides, to give new products named BMS, BMM and BMP.
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26 Mar 2014
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TL;DR: Biochar is a highly stable form of carbon in the soil that may contribute to the reduction of greenhouse gas emissions, such as CO 2, N 2 O and CH 4, and act as a soil conditioner, improving the physical and chemical properties.
Abstract: A B ST R A C T Due to the high activity of microorganisms, the loss of soil organic matter is high in tropical regions. This loss becomes even greater if the soil is managed improperly or when there is no technology that leverages the permanence of the soil carbon by maintaining appropriate levels of organic matter, providing chemical, physical and biological soil improvements and contributing to reduce CO 2 emissions to the atmosphere. Due to its aromatic structure, biochar is a highly stable form of carbon in the soil that may contribute to the reduction of greenhouse gas emissions, such as CO 2 , N 2 O and CH 4 , and act as a soil conditioner, improving the physical and chemical properties of the soil. Biochar may also result in increased productivity due to the improvement of soil attributes or a possible electrophysiological effect. Research over the past decades has demonstrated the potential of biochar as a soil conditioner, improving fertility and nutrient-use efficiency, in addition to maximising the productivity of crops, such as soybean and rice.
48 citations
Cites background from "Emprego do carvão ativado para remo..."
...Most studies related to the pyrolysis of plant materials are aimed at their use as adsorbents in the separation and purification of gases, liquids and solid compounds and thus refer to the production of activated carbon (Lima et al., 2006; Pereira et al., 2008)....
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TL;DR: In this article, the influence of contact time and the amount of adsorbent on the removal of copper from distilled cachaca was evaluated, and the results showed that the samples treated with clay adsorbed 3.6, 8.7, 9.4, 2.2 and 3.9% of the aldehydes, higher alcohols, furfural, esters and volatile acidity.
45 citations
TL;DR: The spot test method associated with DIB allows the use of devices as digital cameras and smartphones to evaluate colorimetric reaction with low waste generation, practicality, quickness, accuracy, precision, high portability and low-cost.
44 citations
Cites background from "Emprego do carvão ativado para remo..."
...However, during the distillation process in copper stills or during the time that the still is not in use, occurs the formation of a compound commonly known as verdigris (basic carbonate of copper [CuCO3Cu(OH)2]) [4]....
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01 Jan 1998
TL;DR: This CD-ROM provides the tools to draw structures and then search for them, and presents over 10,000 monographs which detail chemicals, drugs and biologicals, and describe a single substance or small group of related compounds.
Abstract: Presents over 10,000 monographs which detail chemicals, drugs and biologicals, and describe a single substance or small group of related compounds This CD-ROM provides the tools to draw structures and then search for them Users are able to access the data they need quickly with a choice of search options: text search, structure search, and sub-structure search Text searching is possible for every field of the database: chemical, common, generic and brand names; molecular weights and formulae; physical and toxicity data; and citations to the scientific and patent literature New with this release are organic name reactions available as a fully text searchable file, and 100 new monographs detailing the latest new drugs and compounds of recent interest This CD-ROM should be of interest to medicinal chemists, pharmaceutical chemists, biochemists, environmentalists, medical practitioners, natural product chemists, biologists, food scientists, pharmacologists, clinical chemists, organic chemists, inorganic chemists, and information professionals
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