Adsorption, biosorption and bioaccumulation used to remove chromium (III) from tanning wastewaters : A critical review / B. H. Hintermeyer in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 97, N° 6 (11-12/2013)  

[article]  inJOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC) > Vol. 97, N° 6 (11-12/2013) . - p. 231-237 Titre : Adsorption, biosorption and bioaccumulation used to remove chromium (III) from tanning wastewaters : A critical review Type de document : texte imprimé Auteurs : B. H. Hintermeyer, Auteur ; E. L. Tavani, Auteur Année de publication : 2013 Article en page(s) : p. 231-237 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Absorbants et adsorbants Adsorption Bioaccumulation Biosorption Champignons microscopiques Chrome trivalent Déchets industriels -- Elimination Eaux usées -- Décontamination Eaux usées -- Epuration Eaux usées -- Recyclage Microorganismes Séparation (technologie) Index. décimale : 675.2 Préparation du cuir naturel. Tannage Résumé : Processes of adsorption, biosorption and bioaccumulation were analyzed considering their ability to remove chromium(III). Already published studies that represent the actual state of knowledge were taken into account for this purpose. The review includes a detailed description of principal physicochemical properties of adsorbents, biosorbents and micro-organisms, pointing out those features that explain the mechanism by which the separation occurs. We noted an inadequate evaluation of the bearing species of the tanning agent with respect to treated solutions and that, not always the most adequate species was selected. In order to elucidate both aspects, the way in which the electrical charge and the size of studied complex ions affect the attraction force in adsorption/biosorption were examined. The consideration of such parameters proved that the electrical charge varies enormously from one substance to another and besides it prevails on the size. Accordingly, it was decided to focus attention only on treatments that were performed with tanning wastewater or with basic chromium(III) sulphate. Finally, the amounts of chromium(III) sequestered per gram of each adsorbent/biomaterial were compared. The largest uptake was 189.1mg/g, obtained with a Cr-resistant autochthonous fungus. Note de contenu : - Organic adsorbents - Electric charge and size of chromium (III) bearing species - Amount of chromium (III) retained by each adsorbent En ligne : https://drive.google.com/file/d/1qmrD9Zv-_GzouZpxAndkHY9xXn5JrH_S/view?usp=drive [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=20144 [article]

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Advances in microbial remediation for heavy metal treatment: a mini review in JOURNAL OF LEATHER SCIENCE AND ENGINEERING, Vol. 3 (Année 2021)  

[article]  inJOURNAL OF LEATHER SCIENCE AND ENGINEERING > Vol. 3 (Année 2021) . - 10 p. Titre : Advances in microbial remediation for heavy metal treatment: a mini review Type de document : texte imprimé Année de publication : 2021 Article en page(s) : 10 p. Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Bioaccumulation Bioremédiation Boues résiduaires Caractérisation Eaux usées -- Epuration Endophytes Les endophytes (du grec endo "dans", φυτόν "végétal" ; littéralement "à l'intérieur d'un végétal", terme défini et employé pour la première fois en 1866 par Anton de Bary, mais Link est le premier à décrire en 1809 ces organismes sous le terme d'"Entophytae" considérés alors comme un groupe distinct de parasites fongiques) sont tous les micro-organismes (bactéries ou champignons en général) qui accomplissent tout ou partie de leur cycle de vie à l'intérieur d'une plante, de manière symbiotique (endosymbiote), c'est-à-dire avec un bénéfice mutuel pour les deux organismes ou sans conséquences négatives pour la plante-hôte. L'endophyte peut vivre et se reproduire dans les espaces intercellulaires (méats des parenchymes) et/ou dans certaines cellules de la plante. L'endophyte et son hôte entretiennent une interaction appelée endophytisme. Les endophytes qui font partie du microbiote des plantes (le microbiome étant appelé phytobiome) jouent chez elles un rôle assez comparable à celui du microbiote intestinal chez l'animal, rôle qui selon les études les plus récentes, a été très longtemps inconnu puis sous-estimé. De nombreux endophytes ont une activité ou des propriétés favorisant potentiellement la croissance de la plante, ou sa résilience face à certain stress (chaleur, manque d'eau, sel, attaques parasitaires via l'effet bioinsecticide, etc.). Une partie du génome d'endophyte est parfois retrouvée, intégrée, dans l'ADN de la plante-hôte. Métaux lourds Index. décimale : 675 Technologie du cuir et de la fourrure Résumé : In recent years, microbiological treatment to remediate contamination by heavy metals has aroused public attention as such pollution has seriously threatens ecosystems and human health and impedes sustainable development. However, the aspect of actual industrial wastewater and solid waste remediation by microorganisms is not explored sufficiently. And what we focus on is technical field of microbial remediation. Therefore, in this review, we discuss and summarize heavy metal treatment via microbiological approaches in different media, including wastewater, solid waste from industrial factories and polluted sites. We also clarify the technical applicability from the perspective of biosorption, bioleaching, biominerization, etc. In particular, the exploration of the combination of microbiological approaches with chemical methods or phytoextraction are scrutinized in this review relative to real waste heavy metal remediation. Furthermore, we highlight the importance of hyperaccumulator endophytes. Note de contenu : - BIOLOGICAL TREATMENT OFHEAVY METAL IN DIFFERENT TYPES OF WASTE : Electroplating effluent and sludge - Pollution of mining waste - Leather tanning effluent and sludge - EXPLOITATION OF HYPERACCUMULATING ENDOPHYTIC MICROBES AS AN EFFICIENT HEAVY METAL BIOREMEDIATION STRATEGY : Endophytes isolation and characterization Endophytes with plant growth promoting properties - Application of endophytic microbes in real contaminants - BIOLOGICAL TECHNIQUE PATTERNS APPLICABLE PRINCIPLES - Table 1 : Assessment and biological treatment of heavy metals in different liquid/solid waste - Table 2 : Mechanisms, advantages, disadvantages, reactor, and applicability of the biological techniques DOI : https://doi.org/10.1186/s42825-020-00042-z En ligne : https://link.springer.com/content/pdf/10.1186/s42825-020-00042-z.pdf Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=37462 [article]

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Bioaccumulation of chromium(III) from aqueous solutions of a leather wastewater treatment plant by Saccharomyces cerevisiae yeast / Patrizia Jankovic in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA), Vol. CXV, N° 11 (11/2020)  

[article]  inJOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA) > Vol. CXV, N° 11 (11/2020) . - p. 413-417 Titre : Bioaccumulation of chromium(III) from aqueous solutions of a leather wastewater treatment plant by Saccharomyces cerevisiae yeast Type de document : texte imprimé Auteurs : Patrizia Jankovic, Auteur ; Reno Spinosi, Auteur ; Anna Bacardit, Auteur Année de publication : 2020 Article en page(s) : p. 413-417 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Bioaccumulation Biosorbant Chrome trivalent Eaux usées -- Décontamination Eaux usées -- Epuration Levure (Agent de fermentation) Métaux lourds Microorganismes Index. décimale : 675.2 Préparation du cuir naturel. Tannage Résumé : With many industries discharging heavy metals into natural water resources, heavy metals have been found to accumulate in various living organisms which can ultimately threaten human life and pose a big threat to the environment. Thus, in the pursuit of a solution to the above mentioned problem, bioaccumulation has emerged as an interesting option for the removal of heavy metals from wastewater. In this paper, the effectiveness of the yeast Saccharomyces cerevisiae in the bioaccumulation of Cr3+ has been tested. Also, different factors influencing Cr3+ uptake have been discussed. This work has demonstrated that Saccharomyces cerevisiae is an effective Cr3+ biosorbent for tannery wastewater. The conditions of use of this yeast to achieve optimal chromium (III) absorption are: i) when a growth of the biosorbent equivalent to a similar concentration of Cr3+ is obtained, which contains the residual water that needs to be treated; ii) the smaller the biosorbent is the better the biosorption; iii) the uptake of Cr3+ is more efficient when no extra growth medium is added to the wastewater; iv) the longer the exposure period of the yeast to Cr3+ , the bigger the Cr3+ reduction. Since Saccharomyces cerevisiae is an inexpensive, readily available source of biomass, this discovery could be of great use for a low-budget and efficient wastewater treatment system Note de contenu : - EXPERIMENTAL : Microorganisms and growth conditions - Preparation of the chromium standard solution - Cr3+ uptake experiments with nonadapted and adapted saccharomyces cerevisiae - Cr3+ uptake experiments with different biosorbent doses - Cr3+ uptake experiments with different compsitions of growth medium - Cr3+ uptake experiments with different contact times - RESULTS AND DISCUSSION : Cr3+ uptake experiments with non-adapted and adapted saccharomyces cerevisiae - Cr3+ uptake experiments with different biosorbent dose - Cr3+ uptake experiments with different composition of growth medium - Cr3+ uptake experiments with different contact time DOI : https://doi.org/10.34314/jalca.v115i11.4182 En ligne : https://drive.google.com/file/d/1ZllTv5MXrGBIp_6pO0wDqha4Dm8D18LF/view?usp=drive [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=34848 [article]

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Forever chemicals / Karl Flowers in INTERNATIONAL LEATHER MAKER (ILM), N° 50 (11-12/2021)  

[article]  inINTERNATIONAL LEATHER MAKER (ILM) > N° 50 (11-12/2021) . - p. 34-36 Titre : Forever chemicals Type de document : texte imprimé Auteurs : Karl Flowers, Auteur ; Abigail Clare, Auteur Année de publication : 2021 Article en page(s) : p. 34-36 Langues : Anglais (eng) Catégories : Auto-nettoyage Bioaccumulation Cuir Cuirs et peaux -- Industrie -- Aspect de l'environnement Ecotoxicologie Environnement -- Etudes d'impact Nanotechnologie Produits chimiques -- Toxicologie Substances per- et polyfluoroalkylées Index. décimale : 675 Technologie du cuir et de la fourrure Résumé : Per- and polyfluorinated alkyl substances (PFAS), also known as "forever chemicals", are a group of more than 9,000 highly persistent synthetic chemicals. PFAS contain alkyl groups in which hydrogen atoms are replaced by fluorine. Industrial application and use of PFAS in consumer products commenced in the 1940s. These chemicals were used heavily until the early 2000s when researchers discovered they were environmentally damaging. PFAS do not easily degrade in the environment due to the highly stable carbon-fluorine bond, this strong bond is responsible for the persistent nature of PFAS that enables these chemicals to build up within the environnent and organisms. The carbon chains of the most common PFAS are fully fluorinated and are often attached to a functional group, such as a carboxylic or sulfonic acid. Common PFAS include perfluorooctanoic acid (PFOA) and perfluorooctanesulfonic acid (PFOS). The large diversity of PFAS substances results from the high variability in possible functional groups. Note de contenu : - PFAS in leather - Contamination and environmental impacts - Toxic impacts - Regulation - PFAS alternatives - Fig. 1 : The release of PFAS into the environment during a product's lifecycle - Fig. 2 : The spread and accumulation of PFAS in the environment - Fig. 3 : Nanotechnology providing a self-cleaning effect En ligne : https://drive.google.com/file/d/1c1br-cIoIwriimEGHeNpzWjvIBIjj_vG/view?usp=drive [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=37071 [article]

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Meeting all the challenges / Emmanuelle Yvon in EUROPEAN COATINGS JOURNAL (ECJ), N° 4 (04/2015)  

[article]  inEUROPEAN COATINGS JOURNAL (ECJ) > N° 4 (04/2015) . - p. 132-136 Titre : Meeting all the challenges : European regulatory framework for biocides will become stricter in 2015 Type de document : texte imprimé Auteurs : Emmanuelle Yvon, Auteur ; Paul Wood, Auteur Année de publication : 2015 Article en page(s) : p. 132-136 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Algicides Antimicrobiens Bioaccumulation Chimie industrielle -- Aspect de l'environnement Chimie industrielle -- Législation -- Pays de l'Union européenne Produits chimiques -- Etiquetage Substances dangereuses -- Législation -- Pays de l'Union Européenne Index. décimale : 667.9 Revêtements et enduits Résumé : Restrictions imposed by the EU's Biocidal Products Regulation will increase during 2015. The presence of skin-sensitising substances above a threshold level now triggers labelling with a warning phrase. The Water Framework Directive is likely to restrict the use of some established algaecides because of their bio-accumulation potential. Alternative active materials are suggested. Note de contenu : - Labelling and supply regulations are now stricter - More detailed labelling requirements summarised - Labelling requirements depend on claims made - Stricter labelling for sensitising substances - An effective biocide with low sensitisation risk - How the need for warning phrases can be avoided - Effectiveness of labelling-free biocides confirmed - Water framework directive restricts algaecide choice - Safer algaecide solutions proposed - Protecting active substances for longer effectiveness - Meeting regulatory challenges requires co-operation En ligne : https://drive.google.com/file/d/1ogQxCE9n9U57hk3SCaBR5LePzwpNpHpQ/view?usp=drive [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=23749 [article]

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New hazard classes / Janina Rickers in EUROPEAN COATINGS JOURNAL (ECJ), (11/2023)  

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Les résidus pharmaceutiques des effluents hospitaliers ? / Frédéric Orias in L'ACTUALITE CHIMIQUE, N° 381 (01/2014)  

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The influence of coating color, heartwood and sapwood, on moisture content and growth of microorganisms on the surface during outdoor exposure of Norway spruce boards / Tinh Sjökvist in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 16, N° 3 (05/2019)  

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