1. Effects of the addition of graphene on the compressive strength of geopolymeric mortar developed from k-feldspar mining waste

Abstract Contemporary organizations are showing a growing interest in the reuse of solid waste from industrial processes with the intention of reducing environmental impacts and reducing costs. The mining activity is one of the main waste generators in Brazil. In parallel, geopolymeric materials have been gaining prominence in studies that make it a possible

REM, Int. Eng. J.. Publicado em: 2021-09

2. OPTIMIZATION OF BREWING WASTE’S (TRUB) PHENOLIC COMPOUNDS EXTRACTION BY ULTRASOUND ASSISTED USING RESPONSE SURFACE METHODOLOGY

The brewing waste, also known as trub, is an abundant by-product of the brewing industry. Such material presents high levels of phenolic compounds, which promote antioxidant, antimicrobial and antifungal effects, turning the trub economically attractive. In this study, the trub’s phenolic compounds were extracted by ultrasound-assisted extraction technolog

Quím. Nova. Publicado em: 2021-04

3. A Green Procedure Using Disposable Pipette Extraction to Determine Polycyclic Aromatic Sulfur Heterocycles in Water Samples and Solid Petrochemical Residues

A simple and efficient method using reduced amounts of solvents for the determination of polycyclic aromatic sulfur heterocycles (PASHs) in aqueous matrices from a lagoon and leachate solid waste from a petrochemical industry is proposed. The target analytes were previously concentrated using the disposable pipette extraction (DPX) technique applying gas chr

J. Braz. Chem. Soc.. Publicado em: 2021-02

4. Preparation of Fluorescent Carbon-Based Dots from Waste Tire Pyrolysis

The pyrolysis of waste tire has been proposed as an alternative route to its recycling producing residual oils that can be used as fuels. In this work, a physicochemical process to obtain carbon-based dots (CBD) from carbon black (CBL) derivatives of tires is described. For this, the CBL was treated with different acids to produce CBL1 and CBL2 particles sus

J. Braz. Chem. Soc.. Publicado em: 2020-11

5. HPLC METHOD IMPROVEMENT FOR 4-NONYLPHENOL DETERMINATION IN ANAEROBIC REACTORS: DECREASING SOLVENT CONSUMPTION AND WASTE GENERATION

The aim of this study was to develop a chromatographic method for 4-NP determination in anaerobic batch reactors using low amount of organic solvents and also evaluate 4-NP degradation in the presence of different co-substrates. Chromatographic parameters was improved for stationary phase (C-8 column), mobile phase (acetonitrile/water solution 90:10, v:v), c

Quím. Nova. Publicado em: 2020-09

6. PROCESSING OF A METAL CONCENTRATE FROM GROUND WASTE PRINTED CIRCUIT BOARDS IN ACIDIC MEDIA USING HYDROGEN PEROXIDE AS OXIDANT

The recovery of precious and base metals of a metal concentrate from ground waste printed circuit boards (PCBs) is described in detail. Samples were treated with NaOHaq. to remove the soldering mask. Experiments were performed in acidic medium (HF, H2SO4, CH3COOH or H3PO4) using H2O2 as oxidant. Base metals were leached in high yields (>99 wt.%) at ~40 ºC a

Quím. Nova. Publicado em: 20/07/2020

7. Structural and biological properties of protein hydrolysates from seafood by-products: a review focused on fishery effluents

Abstract Enormous amounts of by-products and waste are generated during the processing of seafood, sometimes representing about 65% of the raw material employed. Seafood by-products (SB) include solid waste such as skin, head, viscera, trimmings, and bones; however, liquid wastes (effluents) derived from operations such as washing, thawing, cooking and the p

Food Sci. Technol. Publicado em: 2020-06

8. Bioactive compounds and value-added applications of cupuassu (Theobroma grandiflorum Schum.) agroindustrial by-product

Abstract Cupuassu is a fruitful species from the Amazon basin with great economical potential, due to the multiple uses of its pulp and seeds in the food and cosmetic industries. This fruit generates large amounts of solid waste, which, despite of its high content of bioactive compounds, is discarded in the environment. Therefore, with the aim of reusing the

Food Sci. Technol. Publicado em: 2020-06

9. BIODIESEL SYNTHESIS FROM WASTE COOKING OIL USING A VARIETY OF WASTE MARBLE AS HETEROGENEOUS CATALYSTS

Abstract The research article is based on biodiesel synthesis by the transesterification of waste cooking oil with methanol in the presence of heterogeneous catalysts prepared from different marble. Eight samples of marble were successfully converted into potential catalysts by calcination. The thermal treatment of waste marbles at 300oC-1000oC converted the

Braz. J. Chem. Eng.. Publicado em: 13/01/2020

10. A evolução histórica da drenagem urbana: da drenagem tradicional à sintonia com a natureza

RESUMO No Brasil, mais de 80% da população brasileira vive em cidades. Como consequência desse crescimento populacional, há impermeabilização do solo, ocupação das faixas marginais de proteção dos rios, desmatamentos, canalização de rios, quantidade crescente de resíduos sólidos que são jogados nesses corpos hídricos, dentre outras. Quando oc

Saúde debate. Publicado em: 13/01/2020

11. Toxicity of leachates from pilot reactors simulating a landfill with different concentrations of AgNP

RESUMO O objetivo deste trabalho foi verificar a toxicidade de lixiviados de reatores piloto (RP) simulando um aterro contendo diferentes concentrações de nanopartículas de prata (AgNP). Testes de toxicidade aguda (48 h) com Daphnia magna foram realizados em lixiviados contendo 50, 150 e 450 mg de AgNP.kg-1, além de um branco para controle. Foram realiza

Eng. Sanit. Ambient.. Publicado em: 20/12/2019

12. A Destinação dos Resíduos Sólidos das Empresas Inovadoras: a Lei do Bem e o seu papel na sustentabilidade ambiental e social

Resumo Investiga-se de que forma a Lei n. 11.196, de 21 de novembro de 2005, conhecida como Lei do Bem, pode contribuir para a sustentabilidade ambiental e social. A Lei do Bem concede incentivos fiscais para empresas realizarem inovação tecnológica. O artigo segue análise qualitativa, pautada em pesquisas bibliográficas e documentais, para argumentar e

Sequência (Florianópolis). Publicado em: 02/12/2019