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Gregorio Crini - One of the best experts on this subject based on the ideXlab platform.

  • polymer enhanced ultrafiltration for heavy metal removal influence of chitosan and carboxymethyl cellulose on filtration performances
    Journal of Cleaner Production, 2018
    Co-Authors: Boukary Lam, Sebastien Deon, Nadia Morincrini, Gregorio Crini, Patrick Fievet
    Abstract:

    Abstract Reclaiming of wastewaters contaminated by heavy metals has become a major challenge over the last decades. For this reason, nanoporous membrane processes have awaken the interest of industry and local community, and the possible ways to improve their performances has become a priority goal for researchers. Metal removal enhancement by polymer addition is a potential way that is deeply investigated herein on nickel ion rejection with chitosan and carboxymethyl cellulose addition. Due to the vanishing of electrostatic interactions induced by the large amount of salt usually contained in effluents, ion rejection consequently drastically drops. However, it is highlighted that a sufficient addition of polymer (higher than 10 −2  M of monomer unit) can offset this decrease and allow good metal removal, while permeation flux is reduced by increased viscosity. Performances are greatly affected by the pH of the filtered solution whose increase notably improves the metal rejection. Finally, ultrafiltration of an Industrial Discharge water with and without chitosan enhancement step shows that the rejection increase generated by the polymer addition is very low due to the competing phenomenon between the various species present in the complex mixture.

  • treated wastewater phytotoxicity assessment using lactuca sativa focus on germination and root elongation test parameters
    Comptes Rendus Biologies, 2017
    Co-Authors: Anne Priac, Pierremarie Badot, Gregorio Crini
    Abstract:

    Sensitive and simple ecotoxicological bioassays like seed germination and root elongation tests are commonly used to evaluate the phytotoxicity of waste and Industrial Discharge waters. Although the tests are performed following national and international standards, various parameters such as the number of seeds per dish, the test duration or the type of support used remain variable. To be able to make a correct comparison of results from different studies, it is crucial to know which parameter(s) could affect ecotoxicological diagnosis. We tested four different control waters and three seed densities. No significant differences on either germination rate or root elongation endpoints were shown. Nevertheless, we found that the four lettuce cultivars (Appia, batavia doree de printemps, grosse blonde paresseuse, and Kinemontepas) showed significantly different responses when watered with the same and different metal-loaded Industrial Discharge water. From the comparison, it is clear that a differential sensitivity scale occurs among not just species but cultivars.

  • pollutant removal from Industrial Discharge water using individual and combined effects of adsorption and ion exchange processes chemical abatement
    Journal of Saudi Chemical Society, 2016
    Co-Authors: Jeremie Charles, Nadia Morincrini, Pierremarie Badot, Corina Bradu, Bertrand Sancey, Peter Winterton, Giangiacomo Torri, Gregorio Crini
    Abstract:

    Abstract In this study, adsorption-oriented processes for pollutant removal from metal polycontaminated surface-finishing Discharge water were applied individually as well as in combination with ion-exchange treatment to remove the remaining metal ions and organic load. Several materials were compared using batch experiments, namely an activated carbon, three ion-exchange resins (IRA 402Cl, IR 120H and TP 207), and two non-conventional cross-linked polysaccharide-based biosorbents (starch and cyclodextrin). This article presents the abatements obtained in chemical pollution as monitored by complete chemical analysis. For the same experimental conditions (similar Discharge water, pollutant concentrations, stirring rate, contact time, and initial pH), the highest levels of pollutant removal were attained with the combined use of two materials, an activated carbon and a mixture of two ion-exchange resins. This physicochemical treatment effectively lowered the main pollutants present in the Discharge water such as Cu, Ni and COD, by more than 96%, 79% and 74% respectively (average values for three samples), while the treatment with carbon alone lowered them by 58%, 9% and 70%, and resins alone by 85%, 61% and 16%. Similar interesting results were obtained with the cyclodextrin-based adsorbent and its use alone was sufficient to obtain decreases in Cu, Ni and COD of more than 94%, 77% and 67% respectively. The adsorption-oriented process using cyclodextrin polymer could be an advantageous approach for removing organic and metallic pollutants from metal surface-finishing Discharge water due to the non-toxic character of CD to humans and the environment.

  • Cross-linked cyclodextrin-based material for treatment of metals and organic substances present in Industrial Discharge waters
    Beilstein Journal of Organic Chemistry, 2016
    Co-Authors: Elise Euvrard, Bernard Martel, Nadia Morin-crini, Coline Druart, Justine Bugnet, Cesare Cosentino, Virginie Moutarlier, Gregorio Crini
    Abstract:

    In this study, a polymer, prepared by crosslinking cyclodextrin (CD) by means of a polycarboxylic acid, was used for the removal of pollutants from spiked solutions and Discharge waters from the surface treatment industry. In spiked solutions containing five metals, sixteen polycyclic aromatic hydrocarbons (PAH) and three alkylphenols (AP), the material exhibited high adsorption capacities: >99% of Co2+, Ni2+ and Zn2+ were removed, between 65 and 82% of the PAHs, as well as 69 to 90% of the APs. Due to the structure of the polymer and its specific characteristics, such as the presence of carboxylic groups and CD cavities, the adsorption mechanism involves four main interactions: ion exchange, electrostatic interactions and precipitation for metal removal, and inclusion complexes for organics removal. In Industrial Discharge waters, competition effects appeared, especially because of the presence of calcium at high concentrations, which competed with other pollutants for the adsorption sites of the adsorbent.

  • Analytical Monitoring of the Chemicals Present in the Discharge Water Generated by the Surface Treatment Industry
    2015
    Co-Authors: Nadia Morin-crini, Coline Druart, Sophie Gavoille, Céline Lagarrigue, Gregorio Crini
    Abstract:

    Copyright © 2013 Nadia Morin-Crini et al. This is an open access article distributed under the Creative Commons Attribution Li-cense, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. Industrial Discharge water, and especially that from the surface treatment industry (ST), contains non-negligible amounts of pollutants even though the legislation is fully respected. In spite of this, no detailed studies list the exact chemical composition of these effluents. The present study reports the results of analyses performed over a 6-month period involving 15 standard water parameters. Over 160 substances including 33 metals, 58 volatile organic com

Ahmed Ghrabi - One of the best experts on this subject based on the ideXlab platform.

  • First Investigation of Seasonal Concentration Behaviors and Sources Assessment of Aliphatic Hydrocarbon in Waters and Sediments from Wadi El Bey, Tunisia
    Archives of Environmental Contamination and Toxicology, 2020
    Co-Authors: Imen Gdara, Ines Zrafi, Catia Balducci, Angelo Cecinato, Ahmed Ghrabi
    Abstract:

    The contents, composition profiles, and sources of aliphatic hydrocarbons were examined in surface sediment and water samples collected from Wadi El Bey, in Tunisia, during different year seasons in 14 stations receiving domestic effluent, Industrial Discharge, and agricultural drainage wastes. The target substances were analyzed by gas chromatography coupled with mass spectrometric detection (GC/MS). Total concentrations of n -alkanes ( n -C_14- n -C_38) ranged from 0.08 ± 0.01 to 18.14 ± 0.1 µg/L in waters and 0.22 ± 0.04 to 31.9 ± 24.6 µg/g in sediments, while total aliphatic fraction ranged from 0.08 ± 0.01 to 196 ± 140 µg/L in waters and 0.22 ± 0.04 to 1977 ± 1219 µg/g in sediments, which means that almost all sites were affected by hydrocarbon contents in sediments exceeding the recommended limit (100 µg/g). Various diagnostic indices (ADIs) were used to identify the hydrocarbon sources, namely the concentration ratios of individual compounds ( n -C_17/pristane, n -C_18/phytane, pristane/phytane, n -C_29/ n -C_17, n -C_31/ n -C_19) as well as cumulative quantities (Carbon Preference Index, natural n -alkanes ratio, terrigenous/aquatic compounds ratio, unresolved complex mixture percentage, low molecular weight vs. high molecular weight homologues, Alkane Proxy and Terrestrial Marine Discriminants). In general, these indexes indicated that the origin of aliphatic hydrocarbons affecting sediments and waters of Wadi El Bey were linked to both biogenic and petrogenic inputs, attesting the impact of plankton and terrestrial plants and of oil contamination, respectively. The average carbon chain length computation (ACL), used to further index the chemical environment, ranged from 25.5 to 31.1 in sediments and 47.9–116 in waters. This finding could depend on the severe disturbances suffered by the ecosystem as a consequence of heavy anthropogenic inputs. Petroleum contamination associated with high eutrophication rates in Wadi El Bey must be strictly controlled, due to possible harmful effects induced on ecosystem and humans.

  • seasonal distribution source identification and toxicological risk assessment of polycyclic aromatic hydrocarbons pahs in sediments from wadi el bey watershed in tunisia
    Archives of Environmental Contamination and Toxicology, 2017
    Co-Authors: Imen Gdara, Ines Zrafi, Catia Balducci, Angelo Cecinato, Ahmed Ghrabi
    Abstract:

    Surface sediments were collected from the Watershed of Wadi El Bey in Tunisia to evaluate the degree of polycyclic aromatic hydrocarbons (PAHs) contamination. Sediments were collected during different seasons in 14 sites that received wastes from domestic effluent, Industrial Discharge, and agricultural drainage wastes. Twenty-six individual PAHs were analyzed. The total PAH contents (Σ PAHs) in surface sediments showed wide variability, ranging from 6.89 ± 0.05 to 340 ± 0.1 ng g−1. The 4-, 5-, and 6-ring compounds were the most abundant PAHs detected at the majority of sites. Diagnostic concentration ratios between pairs of PAHs and molecular indices, calculated with the purpose of drawing information about pollution sources, indicated that PAHs were of both petrogenic and pyrolytic origins. Toxic contaminants concentrations were determined according to the numerical effect-based sediment quality guidelines (SQGs). PAH levels did not exceed the SQGs, indicating that PAHs seem to pose low and occasional toxicity risks. Total carcinogenicity and mutagenicity (TEQBaP and MEQBaP) ranged from 0.08 to 65 ng and from 0.02 to 135.0 ng g−1 of dry weight, respectively. Among the seven carcinogenic PAHs, BaP accounted for the majority of the potency and could potentially be used as a unique indicator of PAH toxicity. This study provides a baseline to promote environmental protection programs and pollution monitoring/control in Watershed and coastal areas.

Gisela De Aragao Umbuzeiro - One of the best experts on this subject based on the ideXlab platform.

  • assessment of water contamination caused by a mutagenic textile effluent dyehouse effluent bearing disperse dyes
    Journal of Hazardous Materials, 2010
    Co-Authors: Patricia A Carneiro, Gisela De Aragao Umbuzeiro, Danielle Palma De Oliveira, Maria Valnice Boldrin Zanoni
    Abstract:

    High performance liquid chromatography coupled to a diode array detector method was developed to detect disperse dyes in water samples over the range 0.50-35 ng, with detection limits of 0.09 ng, 0.84 ng and 0.08 ng, respectively, with good repeatability and accuracy. This study identifies the disperse azo dyes C.I. Disperse Blue 373, C.I. Disperse Orange 37 and Disperse Violet 93 as components of a commercial dye formulation assigned as Dispersol Black Dye (CVS) used in the textile industry for dyeing synthetic fibers that are contributing to the mutagenicity found in the Cristais River, Sao Paulo, Brazil. High performance liquid chromatography coupled to a diode array detector was applied to monitor the occurrence of these dyes in: (1) the treated Industrial effluent, (2) raw river water, (3) treated river water, and (4) the sludge produced by a Drinking Water Treatment Plant (DWTP) which is located 6 km downstream from the textile Industrial Discharge, where dyes' concentrations changed from 1.65 ng L(-1) to 316 microL(-1).

  • the contribution of azo dyes to the mutagenic activity of the cristais river
    Chemosphere, 2005
    Co-Authors: Gisela De Aragao Umbuzeiro, Harold S Freeman, Sarah H Warren, Danielle Palma De Oliveira, Yoshiyasu Terao, Tetsushi Watanabe, Larry D Claxton
    Abstract:

    To verify whether dyes emitted within the Discharge of a dye processing plant were contributing to the mutagenicity repeatedly found in the Cristais River, Sao Paulo, Brazil, we chemically characterized the following mutagenic samples: the treated Industrial effluent, raw and treated water, and the sludge produced by a Drinking Water Treatment Plant (DWTP) located approximately 6 km from the Industrial Discharge. Considering that 20% of the dyes used for coloring activities might be lost to wastewaters and knowing that several dyes have mutagenic activity, we decided to analyze the samples for the presence of dyes. Thin layer chromatographic analysis indicated the presence of three prevalent dyes in all samples, except for the drinking water. This combination of dyes corresponded to a commercial product used by the industry, and it tested positive in the Salmonella assay. The structures of the dye components were determined using proton magnetic resonance and mass spectrometric (MS) methods, and the dyes were tested for mutagenicity. The blue component was identified as the C.I. Disperse Blue 373, the violet as C.I. Disperse Violet 93, and the orange as C.I. Disperse Orange 37. The dyes showed mutagenic responses of 6300, 4600, and 280 revertants/microg for YG1041 with S9 respectively. A bioassay-directed fractionation/chemical analysis showed that the C.I. Disperse Blue 373 contributed 55% of the mutagenic activity of the DWTP sludge. We showed that these dyes contributed to the mutagenic activity found in the Cristais River environmental samples analyzed and are indirectly affecting the quality of the related drinking water. Therefore, we believe that this type of Discharge should be more thoroughly characterized chemically and toxicologically. Additionally, human and ecological risks associated with the release of dye processing plant effluents should be more fully investigated, especially where the resultant water is taken for human consumption.

  • comparison of the mutagenic activity of xad4 and blue rayon extracts of surface water and related drinking water samples
    Mutation Research-genetic Toxicology and Environmental Mutagenesis, 2003
    Co-Authors: Fabio Kummrow, Celia Maria Rech, Deborah A Roubicek, Carlos A Coimbrao, Gisela De Aragao Umbuzeiro
    Abstract:

    The combination of mutagenicity tests and selective extraction methodologies can be useful to indicate the possible classes of genotoxic organic contaminants in water samples. Treated and source water samples from two sites were analyzed: a river under the influence of an azo dye-processing plant Discharge and a reservoir not directly impacted with Industrial Discharges, but contaminated with untreated domestic sewage. Organic extraction was performed in columns packed with XAD4 resin, that adsorbs a broad class of mutagenic compounds like polycyclic aromatic hydrocarbons (PAHs), arylamines, nitrocompounds, quinolines, antraquinones, etc., including the halogenated disinfection by-products; and with blue rayon that selectively adsorbs polycyclic planar structures. The organic extracts were tested for mutagenicity with the Salmonella assay using TA98 and TA100 strains and the potencies were compared. A protocol for cleaning the blue rayon fibers was developed and the efficiency of the reused fibers was analyzed with spiked samples. For the river water samples under the influence of the azo-type dye-processing plant, the mutagenicity was much higher for both blue rayon and XAD4 extracts when compared to the water from the reservoir not directly impacted with Industrial Discharges. For the drinking water samples, although both sites showed mutagenic responses with XAD4, only samples from the site under the influence of the Industrial Discharge showed mutagenic activity with the blue rayon extraction, suggesting the presence of polycyclic compounds in those samples. As expected, negative results were found with the blue rayon extracts of the drinking water collected from the reservoir not contaminated with Industrial Discharges. In this case, it appears that using the blue rayon to extract drinking water samples and comparing the results with the XAD resin extracts we were able to distinguish the mutagenicity caused by Industrial contaminants from the halogenated disinfection by-products generated during water treatment.

Zhiqiang Yu - One of the best experts on this subject based on the ideXlab platform.

  • occurrence and distribution of organophosphorus flame retardants plasticizers and synthetic musks in sediments from source water in the pearl river delta china
    Environmental Toxicology and Chemistry, 2018
    Co-Authors: Xiangying Zeng, Liang Xu, Yang Wu, Zhiqiang Yu
    Abstract:

    The Pearl River and its tributaries receive Discharges of treated/untreated domestic sewage and Industrial wastewater throughout the entire drainage basin. The river provides source water for many local inhabitants, and there is great concern over its pollution status. Fifteen sediment samples were collected from source water areas in the Pearl River Delta (PRD), and analyzed for the occurrence and distribution of two classes of emerging pollutants, namely, organophosphorus flame retardants (OPs) and synthetic musks. In most sediments, five polycyclic musks and two nitromusks were detected, and galaxolide (HHCB) and tonalide (AHTN) were the predominant components, with concentrations of 0.030–547 and 4.31–439 ng/g, respectively. Seven widely-used OPs were found in most sediments; the total concentrations of OPs varied in the range of 1.79–143 ng/g, with tris(2-butoxyethyl) phosphate (TBEOP), tris(2-chloro-isopropyl) phosphate (TCIPP), and triphenyl phosphate (TPHP) being the main components. The results indicated that Industrial Discharge and domestic sewage played important roles for synthetic musks and OPs distribution in sediments in the study area. In general, higher levels of OPs and synthetic musks were found in Guangzhou, Foshan, and Dongguan, suggesting a significant impact from Industrial Discharges and the dense population of these regions. This article is protected by copyright. All rights reserved

Imen Gdara - One of the best experts on this subject based on the ideXlab platform.

  • First Investigation of Seasonal Concentration Behaviors and Sources Assessment of Aliphatic Hydrocarbon in Waters and Sediments from Wadi El Bey, Tunisia
    Archives of Environmental Contamination and Toxicology, 2020
    Co-Authors: Imen Gdara, Ines Zrafi, Catia Balducci, Angelo Cecinato, Ahmed Ghrabi
    Abstract:

    The contents, composition profiles, and sources of aliphatic hydrocarbons were examined in surface sediment and water samples collected from Wadi El Bey, in Tunisia, during different year seasons in 14 stations receiving domestic effluent, Industrial Discharge, and agricultural drainage wastes. The target substances were analyzed by gas chromatography coupled with mass spectrometric detection (GC/MS). Total concentrations of n -alkanes ( n -C_14- n -C_38) ranged from 0.08 ± 0.01 to 18.14 ± 0.1 µg/L in waters and 0.22 ± 0.04 to 31.9 ± 24.6 µg/g in sediments, while total aliphatic fraction ranged from 0.08 ± 0.01 to 196 ± 140 µg/L in waters and 0.22 ± 0.04 to 1977 ± 1219 µg/g in sediments, which means that almost all sites were affected by hydrocarbon contents in sediments exceeding the recommended limit (100 µg/g). Various diagnostic indices (ADIs) were used to identify the hydrocarbon sources, namely the concentration ratios of individual compounds ( n -C_17/pristane, n -C_18/phytane, pristane/phytane, n -C_29/ n -C_17, n -C_31/ n -C_19) as well as cumulative quantities (Carbon Preference Index, natural n -alkanes ratio, terrigenous/aquatic compounds ratio, unresolved complex mixture percentage, low molecular weight vs. high molecular weight homologues, Alkane Proxy and Terrestrial Marine Discriminants). In general, these indexes indicated that the origin of aliphatic hydrocarbons affecting sediments and waters of Wadi El Bey were linked to both biogenic and petrogenic inputs, attesting the impact of plankton and terrestrial plants and of oil contamination, respectively. The average carbon chain length computation (ACL), used to further index the chemical environment, ranged from 25.5 to 31.1 in sediments and 47.9–116 in waters. This finding could depend on the severe disturbances suffered by the ecosystem as a consequence of heavy anthropogenic inputs. Petroleum contamination associated with high eutrophication rates in Wadi El Bey must be strictly controlled, due to possible harmful effects induced on ecosystem and humans.

  • seasonal distribution source identification and toxicological risk assessment of polycyclic aromatic hydrocarbons pahs in sediments from wadi el bey watershed in tunisia
    Archives of Environmental Contamination and Toxicology, 2017
    Co-Authors: Imen Gdara, Ines Zrafi, Catia Balducci, Angelo Cecinato, Ahmed Ghrabi
    Abstract:

    Surface sediments were collected from the Watershed of Wadi El Bey in Tunisia to evaluate the degree of polycyclic aromatic hydrocarbons (PAHs) contamination. Sediments were collected during different seasons in 14 sites that received wastes from domestic effluent, Industrial Discharge, and agricultural drainage wastes. Twenty-six individual PAHs were analyzed. The total PAH contents (Σ PAHs) in surface sediments showed wide variability, ranging from 6.89 ± 0.05 to 340 ± 0.1 ng g−1. The 4-, 5-, and 6-ring compounds were the most abundant PAHs detected at the majority of sites. Diagnostic concentration ratios between pairs of PAHs and molecular indices, calculated with the purpose of drawing information about pollution sources, indicated that PAHs were of both petrogenic and pyrolytic origins. Toxic contaminants concentrations were determined according to the numerical effect-based sediment quality guidelines (SQGs). PAH levels did not exceed the SQGs, indicating that PAHs seem to pose low and occasional toxicity risks. Total carcinogenicity and mutagenicity (TEQBaP and MEQBaP) ranged from 0.08 to 65 ng and from 0.02 to 135.0 ng g−1 of dry weight, respectively. Among the seven carcinogenic PAHs, BaP accounted for the majority of the potency and could potentially be used as a unique indicator of PAH toxicity. This study provides a baseline to promote environmental protection programs and pollution monitoring/control in Watershed and coastal areas.