Novel polyvinylidene fluoride/lead-doped zinc oxide adsorptive membranes for enhancement of the removal of reactive textile dye

Dassi, Roua Ben; Chamam, B.; Méricq, J.P.; Faur, Catherine; Mır, L. El; Trabelsi, Ismaîl; Héran, Marc

doi:10.1007/s13762-020-03026-y

Cited by 6 publications

(2 citation statements)

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“…Characteristics of Remazol Black B-RB5 (adapted from [40]). Bromide in the form of KBr, obtained from SigmaAldrich Chemie GmbH (Sao Paulo, Brazil) at a concentration of 35.70 g L −1 (0.3 mol L −1 ) was used as a non-reactive tracer in the column experiments to determine physical transport parameters.…”

Section: Tablementioning

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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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: Tablementioning

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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“…The percentage of fluoride removal by the synthesized membrane reached a maximum of 84%, under the various optimum conditions. In general, novel hybrid polyvinylidene fluoride membranes were successfully fabricated and have shown a good efficiency in the treatment of wastewaters from textile industry [68].…”

Section: Polymer Membranesmentioning

confidence: 99%

A Mini Review of Recent Findings in Cellulose-, Polymer- and Graphene-Based Membranes for Fluoride Removal from Drinking Water

Tolkou

Meez

Kyzas

et al. 2021

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Effective fluoride removal from water is a persistent global concern both for drinking water and wastewater treatment. According to World Health Organization (WHO), standards for the maximum contaminant level in drinking water cannot be higher than 1.5 mg F− L−1 since affects the skeletal and nervous systems of humans. Various technologies have been developed to decrease fluoride concentration from waters, such as adsorption, coagulation, precipitation and membrane separation. Membrane technology has been found to be a very effective technology, significantly reducing fluoride to desired standards levels; however, it has received less attention than other technologies because it is a costly process. This review aims to discuss the recent studies using modified membranes for fluoride removal. Emphasis is given on cellulose-, polymer- and graphene-based membranes and is further discussing the modification of membranes with several metals that have been developed in the last years. It was observed that the main focus of the total publications has been on the use of polymer-based membranes. Most of the membranes applied for defluoridation exhibit greater efficiency at pH values close to that of drinking water (i.e., 6–8), and maximum treatment capacity was obtained with the use of a cellulose modified membrane Fe-Al-Mn@chitosan with a permeate flux of 2000 L m−2 h−1, following the carbon-based amyloid fibril nano-ZrO2 composites (CAF-Zr) 1750 L m−2. A technical-economic comparison study of NF and RO is also referred, concluding that NF membrane is slightly less expensive.

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