Lixiviação de naftaleno em solos urbanos da região metropolitana do Recife, PE

Carmo, André Inácio do; Antonino, Antônio Celso Dantas; Martins, Jean M.F.; Silva, Valdinete Lins da; Morel, Marie Christine; Gaudet, Jean‐Paul

doi:10.1590/s0100-06832013000500030

Cited by 3 publications

(2 citation statements)

References 22 publications

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“…When they are shifted to the left, retardation factors are below unity, which was confirmed by their values (Table 6). Values of R lower than unity were also found for KBr in a vertisol by Milfont et al [33] and in loamy sand soil by Carmo et al [36]. This feature indicates that bromide elutes through the column faster than water, often attributed to anionic exclusion or isolated volumes of water in the columns [28,47,48].…”

Section: Kbr Transportmentioning

confidence: 69%

“…In the study of pollutant transport in the soil, it is common to use tracers, i.e., chemicals easy to measure and that do not interact with soil, in order to trace water [26,33,34]. One of the most used tracers is bromide (Br-) at several scales in laboratory conditions [33][34][35][36][37][38][39] and in the field [26]. In view of what has been exposed here, the objective of the present study was to evaluate the mobility of RB5 dye and understand the dynamics of this solute transfer process in an alluvial deposit typical of the Alto Capibaribe River (Agreste of Pernambuco, Brazil).…”

Section: Introductionmentioning

confidence: 99%

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Transport Behavior of RB5 Dye in Alluvial Soil in the Northeast of Brazil

Alves

Coutinho

Barros

et al. 2022

Water

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The textile industry generates a large volume of chemically diversified effluents containing, among other compounds, dyes. Untreated wastes are contaminants to surface water, soil, and groundwater. In this aspect, various studies have explored the issue of contamination of alluvial soils in the Alto Capibaribe region, northeast of Brazil, due to local textile activity. This region, inserted into the Brazilian semiarid region, suffers from water scarcity, and there is a need for rural communities to use alluvial formations for water supply. The simulation of solute transport is a fundamental tool for understanding the environmental performance and risks associated with contamination by textile dyes. Transport parameters that directly influence pollutant dynamics in sedimentary environments are characterized. This study evaluated the retention and mobility of the dye Remazol Black 5 (RB5) in two superficial layers of alluvial soil from Alto Capibaribe to obtain transport parameters. In the laboratory, tests of mobility in soil columns with RB5 dye (concentration of the 25 mg L−1) and KBr tracer (concentration of the 35.7 g L−1) solutions were conducted. The CDE and two-region models were used to model the KBr experimental transport data, and the two-site model was used to model the RB5 experimental transport data. Physical non-equilibrium was found in the soils for KBr transport, and the two-region model adequately modeled the experimental breakthrough curves (BTCs). For the transport of RB5, the results showed a chemical non-equilibrium, and the two-site model was adequate to model the experimental BTCs. The results indicate that the surface layer is most responsible for the retention of RB5, where the RB5 solution was less mobile than in the lower layer. Both layers showed low retention and high mobility for RB5, indicating that the RB5 dye in the region may contaminate groundwater.

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Section: Kbr Transportmentioning

confidence: 69%

Section: Introductionmentioning

confidence: 99%

Transport Behavior of RB5 Dye in Alluvial Soil in the Northeast of Brazil

Alves

Coutinho

Barros

et al. 2022

Water

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Spectroscopic and Physicochemical Characterization of Poultry Waste-Based Composts and Charcoal–Compost Mixtures for the Prediction of Dry Matter Yield of Giant of Italy Parsley

Santos

Costa

et al. 2022

Agronomy

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Plant growing substrates obtained by composting agro-industrial waste can serve as organic soil amendments. However, it is crucial to determine the maturity and quality of organic amendments before their application to soil. This study aimed to evaluate the suitability of compost obtained from poultry wastes combined with five different vegetal residues (tree trimmings, sugarcane bagasse, sawdust, cotton residues, and Napier grass) as growth media for container-grown Giant of Italy parsley. Fourier-transform infrared and laser-induced fluorescence spectra were used to characterize the humification extent in composts before and after the addition of charcoal at five inclusion rates (0%, 15%, 30%, 45%, and 60%, weight basis). Spectroscopic measurements identified absorption bands between 1625 and 1448 cm−1 specific to each of the 25 organic amendments evaluated. The most suitable amendments (composts made from sawdust and sugarcane bagasse) were associated with O–H stretching of phenols and aromatic rings. Charcoal addition to composts changed some of their physical characteristics, leading to increased nutrient availability in some cases. Experimental and calculated dry matter yield were compared via multiple linear regression and simple non-linear regression as a function of the spectroscopic and physicochemical (N, P, K, pH, EC, C, HLIF, C:N, CEC, HA:HA) properties of the organic amendments. Regression models accurately assigned high yields to the sawdust- and bagasse-based composts and low yields to the Napier grass- and cotton-based composts. Electrical conductivity (EC) was the main factor limiting potted-parsley productivity, an indication that efficient management of charcoal rate and compost EC levels can aid in predicting parsley yield.

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Cadmium and copper transport in alluvial soils in the Brazilian semiarid region: column percolation and modeling

Barros,

Alves,

Santos

et al. 2023

Revista Brasileira De Ciência Do Solo

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Regarding the Brazilian textile industry, part of the northeast region stands out as the second-largest textile manufacturing hub in the country. Despite its importance, this industrial activity has been bringing relevant environmental concerns regarding the disposal of textile effluents, especially from industrial laundries. This waste contains many chemicals and among them are various types of heavy metals. To assess environmental risks associated with heavy metals, pollutant transfer needs to be investigated. This study evaluated the retention and mobility of heavy metals Cd and Cu in alluvial soil, through soil column tests. The up-flow column percolation tests were performed using a nonreactive tracer (KBr) at a concentration of 0.3 mol L -1 and injecting a metallic solution containing Cu and Cd at 100 and 60 mg L -1 , respectively. The injection flow rate was 0.75 mL min -1 . The hydro-dispersive parameters were obtained by modeling the observed breakthrough curves with the convection-dispersion equation (CDE) and the two-region model, also referred to as the MIM (Mobile-IMmobile waters) model. The transport parameters were obtained from the two-site model (TSS). All elution curves were fitted to the models with the CXTFIT 2.0 program. The Two-Site Sorption Model was the best for the case studied, with R 2 of 0.985 and 0.995 for Cu and Cd, respectively. The values of R were considerably higher than the unit, presenting an average of 2.138 for Cu and 1.907 for Cd. This indicates a delay of these contaminants when leaving the column, which is caused by the interaction of these chemical compounds with the soil. The values obtained for parameter D were 3.469 for Cu and 5.205 for Cd. Thus, the metals in this study present a risk of groundwater contamination for the local alluvial aquifers. The main reason for that is the physicochemical features of the soil, such as high sand content (85 %) and low OM content (2.1 %). The results also indicated greater retention and less mobility for Cu than for Cd, pointing to a greater risk for Cd.

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Lixiviação de naftaleno em solos urbanos da região metropolitana do Recife, PE

Cited by 3 publications

References 22 publications

Transport Behavior of RB5 Dye in Alluvial Soil in the Northeast of Brazil

Transport Behavior of RB5 Dye in Alluvial Soil in the Northeast of Brazil

Spectroscopic and Physicochemical Characterization of Poultry Waste-Based Composts and Charcoal–Compost Mixtures for the Prediction of Dry Matter Yield of Giant of Italy Parsley

Cadmium and copper transport in alluvial soils in the Brazilian semiarid region: column percolation and modeling

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