Jorge Menezes - Academia.edu (original) (raw)

Papers by Jorge Menezes

International Journal of Environmental Research and Public Health

In this study, five types of modified Ziziphus joazeiro barks were investigated for the removal o... more In this study, five types of modified Ziziphus joazeiro barks were investigated for the removal of Pb(II) ions from aqueous solutions. The samples tested were natural barks, natural powder, washed with water, ethanol at 80% (EE) and 0.5 N NaOH. Batch kinetics experiments were performed under the conditions: 24–25 °C, pH 5.5–5.8, 102 mg·L−1 Pb(NO3)2, 100 rpm and 0.1 g of adsorbent, and analyses of pHpzc and Fourier transform infrared spectroscopy. All adsorbents tested showed potential to remove Pb(II) ions, but the adsorbent washed by 0.5 N NaOH obtained the highest experimental performance (25.5 mg·g−1 at 30 min), while the EE had the least performance (20.4 mg·g−1 at 60 min), and maximum removals of 99.9%. The kinetic models pointed to a probable chemisorption due to the best fit of pseudo-second order and Elovich, and Boyd’s model, suggesting that intraparticle diffusion limits the adsorption until the initial minutes of contact. The Langmuir isotherm fitted better to the experim...

Research, Society and Development, 2020

O uso de argilas na remoção de metais tóxicos presentes em corpos hídricos vem sendo testados por... more O uso de argilas na remoção de metais tóxicos presentes em corpos hídricos vem sendo testados por inúmeros pesquisadores. Todavia há uma necessidade de dar uma destinação a esse tipo de material após o seu uso como adsorvente. Uma opção para uma eficiente destinação deste material seria a incorporação dos mesmos na constituição das misturas argilosas constituintes de cerâmicas. Objetivou-se verificar a capacidade de remoção de íons metálicos Cu(II) e Ni(II) a partir de matrizes cerâmicas. Foram avaliadas a capacidade de retenção dos íons metálicos nas estruturas das cerâmicas e as propriedades mecânicas das mesmas após a incorporação do lodo galvânico e do efluente contaminado com os metais tóxicos. Estudos de lixiviação foram feitos sobre as peças cerâmicas para avaliar a possível liberação dos íons metálicos ao meio ambiente. Os resultados apresentados para os aspectos mecânicos das peças cerâmicas mostraram que a incorporação do lodo galvânico, bem como do efluente liquido não c...

This study was carried out to assess the impacts of heavy metals coming into the Parnaíba River D... more This study was carried out to assess the impacts of heavy metals coming into the Parnaíba River Delta in the Brazilian Northeastern region. The sediment concentrations of different heavy metals, such as Pb, Ni, Cr, Cd, Zn, Cu, Fe, Al and Mn, were measured by flame spectrometry. The sediments were collected from 19 sites distributed along 5 estuarine channels. The average concentrations found for Cu and Zn are compatible with the TEL (Threshold Effect Level). However, Cd concentrations were above the PEL (Probable Effect Level) values, while Ni and Cr showed intermediate mean concentrations. There are no established concentration limits for Mn, Al and Fe. These are the first metal biogeochemistry findings in the area and will contribute to the decision-making of environmental authorities, aiming to control the emissions of metallic pollutants in this important area of the Brazilian coast.

Revista Brasileira de Geografia Física, 2021

Embora seja a área que detenha a menor parcela dos recursos hídricos do país, o semiárido brasile... more Embora seja a área que detenha a menor parcela dos recursos hídricos do país, o semiárido brasileiro evidencia casos de descuido com esse valioso elemento. Assim, a presente investigação propôs realizar estudo sobre a perda da qualidade da água do açude Senador Epitácio Pessoa (Açude Grande), relacionando sua histórica degradação ao crescimento da cidade de Cajazeiras-PB, onde está localizado. O objetivo do artigo foi demonstrar, mediante exemplo concreto, a possibilidade de se inferir sobre a qualidade da água superficial lançando mão de técnicas de Sensoriamento Remoto comparadas à realidade constatada no campo. A principal metodologia empregada foi o uso dos Coeficientes de Determinação Linear (R²) e de Correlação de Pearson (ρ) entre o Índice de Estado Trófico para Reservatórios no Semiárido (IETSA) e a resposta espectral da água captada por meio de satélite, aferidos entre o período chuvoso e o período seco de 2019. Para isso, foram utilizados dados registrados pela série de mi...

Ecotoxicology and Environmental Safety, 2020

INTRODUCTION Pesticides are organic compounds widely used in modern agriculture, being relevant f... more INTRODUCTION Pesticides are organic compounds widely used in modern agriculture, being relevant for helping plantations and increasing food production. The banana, a fruit with oriental origin, stands out for being widely produced in tropical and subtropical regions which, like other matrices, is susceptible to pest action. This review aims to evaluate the presence of pesticides in bananas according to Brazilian, European and Codex legislation. METHODS Four databases, ScienceDirect, SciELO, PubMed and Springer, were used to find relevant articles in the literature addressing methods for the determination of pesticide residues in bananas using the terms "banana", "chromatography", "pesticides" and "determination". The search stages included reading abstracts and titles, reading the full text, extracting data and analyzing data from eligible articles. The search was restricted to original research articles published in English from 2008 to 2018. RESULTS 404 articles were found from the initial research, with only 15 studies being considered eligible for this review. Mass spectrometry is the most widely used detection technique. 5 articles were seen to use a multiresidue method to analyze only bananas (pulp), and from these, only 2 studies used methods to analyze the pulp and peel. The articles analyzed 172 samples, with 59.3% of these being conducted in Europe, 32.5% being conducted in Asia and only 8.1% in South America. A total of 79.1%, 32.4% and 42.6% of samples were unsatisfactory according to the Brazilian, European and Codex legislation, respectively, with these samples being contaminated with pesticide residues. CONCLUSION This review presents the scarcity of articles aimed at identifying pesticide residues in bananas and the urgency of checking the quality of the fruit that reaches the population. The MRLs allowed by different legislations have clear divergences that do not ensure the lowest concentration values that guarantee consumer safety.

Journal of Arid Environments, 2019

This paper presents the estimates of nitrogen and phosphorus loads associated with different land... more This paper presents the estimates of nitrogen and phosphorus loads associated with different land uses in a semiarid watershed in the Brazilian northeast (NE). To calculate the annual loads and calibrate de estimates, we used emission factors related to natural processes and human activities from land uses and monitored the nutrient concentrations in surficial waters. The concentrations of TN were above the 2.18 mg N L −1 limit for lotic environments while the TP exceeded the limit value of 0.15 mg P L −1 established in the Brazilian legislation. The total loads L e N P , corresponded to 16,621 t N yr −1 and 3,211 t P yr −1 or 1,292 t N km −2 yr −1 and 250 t P km −2 yr −1. The anthropogenic emissions accounted for 82.1% of the N and 91.3% of the P emitted. The results for the Salgado river basin are lower than those estimated globally, but exceed the values obtained for the South American continent in an order of magnitude. The use of nutrient loads instead of concentrations, particularly in areas where detailed studies on nutrient concentrations are unavailable, such as in the semi-arid NE Brazil, may become a satisfactory approach to evaluate the sensitivity of aquatic systems to a further introduction of anthropogenic effluents.

International Journal of Environmental Research and Public Health

In this study, five types of modified Ziziphus joazeiro barks were investigated for the removal o... more In this study, five types of modified Ziziphus joazeiro barks were investigated for the removal of Pb(II) ions from aqueous solutions. The samples tested were natural barks, natural powder, washed with water, ethanol at 80% (EE) and 0.5 N NaOH. Batch kinetics experiments were performed under the conditions: 24–25 °C, pH 5.5–5.8, 102 mg·L−1 Pb(NO3)2, 100 rpm and 0.1 g of adsorbent, and analyses of pHpzc and Fourier transform infrared spectroscopy. All adsorbents tested showed potential to remove Pb(II) ions, but the adsorbent washed by 0.5 N NaOH obtained the highest experimental performance (25.5 mg·g−1 at 30 min), while the EE had the least performance (20.4 mg·g−1 at 60 min), and maximum removals of 99.9%. The kinetic models pointed to a probable chemisorption due to the best fit of pseudo-second order and Elovich, and Boyd’s model, suggesting that intraparticle diffusion limits the adsorption until the initial minutes of contact. The Langmuir isotherm fitted better to the experim...

Research, Society and Development, 2020

O uso de argilas na remoção de metais tóxicos presentes em corpos hídricos vem sendo testados por... more O uso de argilas na remoção de metais tóxicos presentes em corpos hídricos vem sendo testados por inúmeros pesquisadores. Todavia há uma necessidade de dar uma destinação a esse tipo de material após o seu uso como adsorvente. Uma opção para uma eficiente destinação deste material seria a incorporação dos mesmos na constituição das misturas argilosas constituintes de cerâmicas. Objetivou-se verificar a capacidade de remoção de íons metálicos Cu(II) e Ni(II) a partir de matrizes cerâmicas. Foram avaliadas a capacidade de retenção dos íons metálicos nas estruturas das cerâmicas e as propriedades mecânicas das mesmas após a incorporação do lodo galvânico e do efluente contaminado com os metais tóxicos. Estudos de lixiviação foram feitos sobre as peças cerâmicas para avaliar a possível liberação dos íons metálicos ao meio ambiente. Os resultados apresentados para os aspectos mecânicos das peças cerâmicas mostraram que a incorporação do lodo galvânico, bem como do efluente liquido não c...

This study was carried out to assess the impacts of heavy metals coming into the Parnaíba River D... more This study was carried out to assess the impacts of heavy metals coming into the Parnaíba River Delta in the Brazilian Northeastern region. The sediment concentrations of different heavy metals, such as Pb, Ni, Cr, Cd, Zn, Cu, Fe, Al and Mn, were measured by flame spectrometry. The sediments were collected from 19 sites distributed along 5 estuarine channels. The average concentrations found for Cu and Zn are compatible with the TEL (Threshold Effect Level). However, Cd concentrations were above the PEL (Probable Effect Level) values, while Ni and Cr showed intermediate mean concentrations. There are no established concentration limits for Mn, Al and Fe. These are the first metal biogeochemistry findings in the area and will contribute to the decision-making of environmental authorities, aiming to control the emissions of metallic pollutants in this important area of the Brazilian coast.

Revista Brasileira de Geografia Física, 2021

Embora seja a área que detenha a menor parcela dos recursos hídricos do país, o semiárido brasile... more Embora seja a área que detenha a menor parcela dos recursos hídricos do país, o semiárido brasileiro evidencia casos de descuido com esse valioso elemento. Assim, a presente investigação propôs realizar estudo sobre a perda da qualidade da água do açude Senador Epitácio Pessoa (Açude Grande), relacionando sua histórica degradação ao crescimento da cidade de Cajazeiras-PB, onde está localizado. O objetivo do artigo foi demonstrar, mediante exemplo concreto, a possibilidade de se inferir sobre a qualidade da água superficial lançando mão de técnicas de Sensoriamento Remoto comparadas à realidade constatada no campo. A principal metodologia empregada foi o uso dos Coeficientes de Determinação Linear (R²) e de Correlação de Pearson (ρ) entre o Índice de Estado Trófico para Reservatórios no Semiárido (IETSA) e a resposta espectral da água captada por meio de satélite, aferidos entre o período chuvoso e o período seco de 2019. Para isso, foram utilizados dados registrados pela série de mi...

Ecotoxicology and Environmental Safety, 2020

INTRODUCTION Pesticides are organic compounds widely used in modern agriculture, being relevant f... more INTRODUCTION Pesticides are organic compounds widely used in modern agriculture, being relevant for helping plantations and increasing food production. The banana, a fruit with oriental origin, stands out for being widely produced in tropical and subtropical regions which, like other matrices, is susceptible to pest action. This review aims to evaluate the presence of pesticides in bananas according to Brazilian, European and Codex legislation. METHODS Four databases, ScienceDirect, SciELO, PubMed and Springer, were used to find relevant articles in the literature addressing methods for the determination of pesticide residues in bananas using the terms "banana", "chromatography", "pesticides" and "determination". The search stages included reading abstracts and titles, reading the full text, extracting data and analyzing data from eligible articles. The search was restricted to original research articles published in English from 2008 to 2018. RESULTS 404 articles were found from the initial research, with only 15 studies being considered eligible for this review. Mass spectrometry is the most widely used detection technique. 5 articles were seen to use a multiresidue method to analyze only bananas (pulp), and from these, only 2 studies used methods to analyze the pulp and peel. The articles analyzed 172 samples, with 59.3% of these being conducted in Europe, 32.5% being conducted in Asia and only 8.1% in South America. A total of 79.1%, 32.4% and 42.6% of samples were unsatisfactory according to the Brazilian, European and Codex legislation, respectively, with these samples being contaminated with pesticide residues. CONCLUSION This review presents the scarcity of articles aimed at identifying pesticide residues in bananas and the urgency of checking the quality of the fruit that reaches the population. The MRLs allowed by different legislations have clear divergences that do not ensure the lowest concentration values that guarantee consumer safety.

Journal of Arid Environments, 2019

This paper presents the estimates of nitrogen and phosphorus loads associated with different land... more This paper presents the estimates of nitrogen and phosphorus loads associated with different land uses in a semiarid watershed in the Brazilian northeast (NE). To calculate the annual loads and calibrate de estimates, we used emission factors related to natural processes and human activities from land uses and monitored the nutrient concentrations in surficial waters. The concentrations of TN were above the 2.18 mg N L −1 limit for lotic environments while the TP exceeded the limit value of 0.15 mg P L −1 established in the Brazilian legislation. The total loads L e N P , corresponded to 16,621 t N yr −1 and 3,211 t P yr −1 or 1,292 t N km −2 yr −1 and 250 t P km −2 yr −1. The anthropogenic emissions accounted for 82.1% of the N and 91.3% of the P emitted. The results for the Salgado river basin are lower than those estimated globally, but exceed the values obtained for the South American continent in an order of magnitude. The use of nutrient loads instead of concentrations, particularly in areas where detailed studies on nutrient concentrations are unavailable, such as in the semi-arid NE Brazil, may become a satisfactory approach to evaluate the sensitivity of aquatic systems to a further introduction of anthropogenic effluents.