Accueil
Catégories
Ajouter le résultat dans votre panier Affiner la recherche
Etendre la recherche sur niveau(x) vers le bas
Efficient removal of ammonia-nitrogen from deliming effluent by using magnesium ammonium phosphate precipitation method / Hao Wang in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA), Vol. CXVII, N° 3 (03/2022)
[article]
Titre : Efficient removal of ammonia-nitrogen from deliming effluent by using magnesium ammonium phosphate precipitation method Type de document : texte imprimé Auteurs : Hao Wang, Auteur ; Chao Lei, Auteur ; Yunhang Zeng, Auteur ; Hongguang Guo, Auteur ; Bi Shi, Auteur Année de publication : 2022 Article en page(s) : p. 104-112 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Azote ammoniacal
Caractérisation
Cuirs et peaux
Déchets industriels -- Elimination
Eaux usées -- Epuration
pH
Phosphate d'ammonium
Phosphate de magnésiumLe terme phosphate de magnésium est le nom générique pour les sels inorganiques de magnésium issus de l'acide phosphorique. Leur formule est :
- le dihydrogénophosphate de magnésium (Mg(H2PO4)2) ;
- l'hydrogénophosphate de magnésium (MgHPO4) ;
- le phosphate de magnésium (proprement dit) ou phosphate de trimagnésium (Mg3(PO4)2
Ils incorporent éventuellement des molécules d'eau de cristallisation ; par exemple, le phosphate de magnésium tribasique (Mg3(PO4)2⋅nH2O) peut contenir 4, 5 ou 8 molécules d'eau. La bobierrite (it) est la forme minérale naturelle du phosphate de magnésium octahydraté.
L'hydrogénophosphate de magnésium trihydraté se présente sous la forme d'une poudre blanche cristalline. La newbéryite est sa forme minérale naturelle.
Les phosphates de magnésium entrent dans la composition du tissu osseux. (Wikipedia)
Précipitation (chimie)
Tannage -- DéchetsIndex. décimale : 675 Technologie du cuir et de la fourrure Résumé : Ammonia nitrogen (NH 3 -N) pollutant has received much attention in the leather industry. An efficient strategy for removal of NH 3 -N from tannery wastewater was proposed by using a magnesium ammonium phosphate (MAP) precipitation method to remove NH 3 -N from deliming effluent with the highest NH 3 -N concentration among all leather-making effluents. Results showed that approximately 80% of NH 3 -N was removed from deliming effluent when reacting at P/Mg/N mole ratio of 1.2:1.2:1.0 and pH 9.5 for 20 min. The NH 3 -N and total nitrogen concentrations of tannery wastewater (a composite wastewater of all leather-making effluents) sharply decreased by treating deliming effluent with MAP precipitation, which greatly improved the biological treatment efficiency of tannery wastewater. The residual concentration of NH 3 -N in the treated tannery wastewater was less than 2 mg/L. The total phosphorus concentration of tannery wastewater increased by less than 0.4 mg/L, indicating that secondary pollution of phosphorus did not occur after MAP precipitation treatment. Note de contenu : - EXPERIMENTAL : Materials - Effect of pH adjustment method on NH3-N removal efficency - Optimization of MAP precipitation method for removal of NH3-N from deliming effluent - Effect of P/N - Effect of Mg/N - Effect of reaction pH - Effect of reaction time - X-ray diffraction analysis of precipitate - Aerobic bological treatment of simulated tannery wastewater
- RESULTS AND DISCUSSION : Effect of pH adjustment method on NH3-H removal efficiency - Effects of reaction conditions on the removal of NH3-N from deliming effluent byusing MAP precipitation method - Characterization of precipitation - Effect of MAP precipitation method on the biological treatment of tannery wastewater
- Table 1 : Wastewater sampling from leather-making procedures
- Table 2 : Effect of pH adjustment method on nH3-N removal efficiency
- Table 3 : Concentrations of NH3-N, TOC, TN, and TP in simulated tannery wastewater before and after aerobic biological treatmentEn ligne : https://drive.google.com/file/d/1x6437XHaUBXbfG44KKIBz68wrvyhOs4J/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=37601
in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA) > Vol. CXVII, N° 3 (03/2022) . - p. 104-112[article]Réservation
Réserver ce document
Exemplaires (1)
Code-barres Cote Support Localisation Section Disponibilité 23402 - Périodique Bibliothèque principale Documentaires Disponible Electrochemical separation of chromium containing tannery waste liquid / Zheng Haonan in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 104, N° 3 (05-06/2020)
[article]
Titre : Electrochemical separation of chromium containing tannery waste liquid Type de document : texte imprimé Auteurs : Zheng Haonan, Auteur ; Cao Shengkui, Auteur ; Yang Wenhua, Auteur ; Zhihua Shan, Auteur Année de publication : 2020 Article en page(s) : p. 145-150 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Eaux usées -- Décontamination
Eaux usées -- Teneur en chrome hexavalent
Eaux usées -- Teneur en chrome trivalent
Electrochimie
Electrolyse
Énergie -- Consommation
Membranes échangeuses d'ions
Séparation (technologie)
Tannage -- Déchets
Tannage au chromeIndex. décimale : 675.2 Préparation du cuir naturel. Tannage Résumé : Comparing the electrolysis results of a chromium sulphate standard solution with cation and anion membranes, it was found that electrolysis with the cation membrane could remove more chromium. After electrolysis with the cation membrane of the mixed waste liquid containing chromium from chrome tanning, washing, chrome retanning and neutralisation, Cr(OH)3 could be precipitated, the Cr3+ solution showed a reduced concentration at the cathode, and a Cr6+ solution could be obtained at the anode. The results of this study show that cyclic electrolysis of such liquid waste containing chromium at the cathode can increase Cr(OH)3 precipitation and reduce the Cr6+ concentration at the anode. Note de contenu : - PRINCIPLE OF CHROMIUM REMOVAL BY AN ELECTROCHEMICAL METHOD
- EXPERIMENTAL METHOD : Main reagents - Main instruments and equipment - Determination of the chromium content - Preparation of the waste liquid containing chromium - Electrolysis experiment
- EXPERIMENTAL RESULTS AND DISCUSSION : Electrolysis of the chromium sulphate standard solution with an anion membrane - Double cell electrolysis of chromium sulphate standard solution with a cation membrane - Double cell electrolysis of waste liquid containing chromium with a cation membrane - Results of the cyclic electrolysis of waste liquid containing chromium in the cathode - Electrical energy consumption of one cycle of electrolysisEn ligne : https://drive.google.com/file/d/1j6UDp1T1ywy_Th55yvNEtuT1g3TvrLsI/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=34244
in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC) > Vol. 104, N° 3 (05-06/2020) . - p. 145-150[article]Réservation
Réserver ce document
Exemplaires (1)
Code-barres Cote Support Localisation Section Disponibilité 21767 - Périodique Bibliothèque principale Documentaires Disponible Exploring the mechanisms of the interaction between a specific bioflocculant and tannery wastewater / Changqing Zhao in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 102, N° 2 (03-04/2018)
[article]
Titre : Exploring the mechanisms of the interaction between a specific bioflocculant and tannery wastewater Type de document : texte imprimé Auteurs : Changqing Zhao, Auteur ; Shu Li, Auteur ; Yang Qinhuan, Auteur ; Wuyong Chen, Auteur Année de publication : 2018 Article en page(s) : p. 75-80 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Adsorption
Coagulation
Eaux usées -- Analyse
Floculant
Floculation
Liaisons chimiques
Neutralisation (chimie)
Réactions chimiques
Tannage -- DéchetsIndex. décimale : 675.2 Préparation du cuir naturel. Tannage Résumé : To explore the interaction between a bioflocculant produced using Bacillus cereus and tannery wastewater, four flocculation mechanisms were studied including chemical interaction, charge neutralisation, adsorption and bridging, and sweep-floc coagulation. First, the interaction of the bioflocculant and tannery wastewater was evaluated using the infrared spectrum. It was found that there was no significant difference of spectrum before and after flocculation, indicating no chemical interaction between the bioflocculant and tannery wastewater. Second, it was found that no electric potential change was detected when comparing the samples before and after the addition of the bioflocculant into the tannery wastewater, indicating no charge neutralization during flocculation. Third, the presence of adsorption and bridging was determined by testing the molecular weight, covalent bonds and particle sizes during flocculation. These factors showed that the adsorption and bridging took place during the flocculation process. Finally, the morphological observation of the flocs exhibited network structures, indicating the existence of sweep-floc coagulation. The results represented that the interaction between the bioflocculant and tannery wastewater mainly involved adsorption and bridging, and sweep-floc coagulation. Note de contenu : - EXPERIMENTAL PROCEDURE : Preparation of the simulated tannery wastewater - Preparation of bioflocculant - Exploring chemical reactions - Exploring charge neutralisation - Exploring adsorption and bridging - Exploring the sweep-floc coagulation
- RESULTS AND DISCUSSION : The exploration of chemical reactions - The exploration of charge neutralisation - The exploration of adsorption and bridging - Analysis of the sweep-floc coagulationEn ligne : https://drive.google.com/file/d/1GEXWCcL6OdsLByZLbnP5HLsN_Gndmuk_/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=30558
in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC) > Vol. 102, N° 2 (03-04/2018) . - p. 75-80[article]Réservation
Réserver ce document
Exemplaires (1)
Code-barres Cote Support Localisation Section Disponibilité 19867 - Périodique Bibliothèque principale Documentaires Disponible Facile fabrication of functional cellulose paper with high-capacity immobilization of Ag nanoparticles for catalytic applications for tannery wastewater / Ruiquan Yu in JOURNAL OF LEATHER SCIENCE AND ENGINEERING, Vol. 2 (Année 2020)
[article]
Titre : Facile fabrication of functional cellulose paper with high-capacity immobilization of Ag nanoparticles for catalytic applications for tannery wastewater Type de document : texte imprimé Auteurs : Ruiquan Yu, Auteur ; Tianxiang Lan, Auteur ; Jing Jiang, Auteur ; Hao Peng, Auteur ; Ruifeng Liang, Auteur ; Gongyan Liu, Auteur Année de publication : 2020 Article en page(s) : 11 p. Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Argent
Catalyseurs
CelluloseLa cellulose est un glucide constitué d'une chaîne linéaire de molécules de D-Glucose (entre 200 et 14 000) et principal constituant des végétaux et en particulier de la paroi de leurs cellules.
Eaux usées
Nanoparticules
Papier
Tannage -- DéchetsIndex. décimale : 675.2 Préparation du cuir naturel. Tannage Résumé : It has been a research goal to develop macroscopic materials with an optimized surface structure to affix silver nanoparticles which could contaminate water and maximize their practical functions. Cellulose paper is a versatile biomass material valued for its abundance, low cost, biocompatibility, and natural composition. Until now, its potential application in water purification has not been adequately explored. In this study, gallic acid-modified silver nanoparticles (GA@AgNPs) were loaded onto commercial cellulose filter paper using a simple lipoic acid modification process (GA@AgNPs-LA-CP). Scanning electron microscopy (SEM), X-ray photoelectron spectroscopy (XPS), and X-ray diffraction (XRD) were used to characterize the GA@AgNPs-LA-CP. The catalytic activity of the GA@AgNPs-LA-CP was evaluated by the reduction reaction of methylene blue (MB), Rhodamine B (RhB), and 4-nitrophenol (4-NP) with sodium borohydride (NaBH4). The GA@AgNPs-LA-CP exhibited excellent catalytic activity toward MB, RhB, and 4-NP, taking advantage of its high specific surface area generated by the cellulose fiber network structure. Interestingly, due to the electrostatic interactions between the cationic dyes and the GA@AgNPs, the as-prepared catalytic composite material serves as a better catalyst for MB and RhB, suggesting dual applications of the composite materials for organic wastewater treatment and the removal of harmful dyes. This implies that the immobilization of AgNPs on cellulose papers is an effective method and can be applied to efficient wastewater treatment applications. Note de contenu : - EXPERIMENTAL SECTION : Materials - Preparation of lipoic acid-modified cellulose paper (LA-CP) - Preparation of GA@AgNPs immobilized cellulose paper by lipoic acid modification (GA@AgNPs-LA-CP) - Characterizations - Measurement of Ag content on GA@AgNPs-LA-CP - Catalytic reduction of 4-NP, MB and RhB
- RESULTS AND DISCUSSION : Preparation and characterization of GA@AgNPs-LA-CP
- CATALYTIC PROPERTIES OF GA@AgNPs-LA-CPDOI : https://doi.org/10.1186/s42825-020-00019-y En ligne : https://link.springer.com/content/pdf/10.1186/s42825-020-00019-y.pdf Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=37330
in JOURNAL OF LEATHER SCIENCE AND ENGINEERING > Vol. 2 (Année 2020) . - 11 p.[article]Factors influencing chromium recovery from chromium sulphate tanned leather scrap ashes / S. Carneiro in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 87, N° 1 (01-02/2003)
[article]
Titre : Factors influencing chromium recovery from chromium sulphate tanned leather scrap ashes Type de document : texte imprimé Auteurs : S. Carneiro, Auteur ; M. F. Almeida, Auteur ; M. F. Ferreira, Auteur Année de publication : 2003 Article en page(s) : p. 1-10 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Cendres -- Teneur en chrome
Chrome -- Recyclage
Cuirs et peaux
Déchets industriels -- Recyclage
Incinération
Tannage -- DéchetsIndex. décimale : 675.2 Préparation du cuir naturel. Tannage Résumé : Basic chromium salt is the main tanning reagent used all over the world and it represents one of the most important applications of chromium salts. When leather scrap tanned with chromium sulphate is burned, the respective ashes contain meaningful amounts of chromium, some of it in the hexavalent form.
This paper presents some efforts aimed at using the ashes from a fixed grate incinerator (FGI) as a source of chromium for various applications. Two types of ashes were characterised. Several tests with mixtures of alkaline and alkaline earth fluxes followed by hot washing the product were carried out to recover chromium from the ashes. The factors influencing chromium recovery were screened through an experimental design approach and hypothesis testing. Using ashes as pigment for ceramic glazes was also evaluated.Note de contenu : - CHARACTERISATION OF ASHES AND EXPERIMETNAL PROCEDURES : Principles of the experimental process
- RESULTS AND DISCUSSION : First set of experiments - Second set of experiments - Third set of experiments - Fourth set of experiments
- Table 1 : Experiments carried out at 750°C with NA2CO3 based mixtures and respective Cr recoveries
- Table 2 : Experiments carried out at 350, 450 and 550°C with mixtures based on NaOH
- Table 3 : Cr recoveries at 350, 450 and 550°C with mixtures based on NaOH
- Table 4 : Experiments carried out at 350, 450 and 550°C with mixtures based on NaOH and NaNO3En ligne : https://drive.google.com/file/d/19Zv2OsYHHMm0WjcPxW4ash70Z_iVjqG8/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=39804
in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC) > Vol. 87, N° 1 (01-02/2003) . - p. 1-10[article]A fast method for determination of sulfate in tannery waste waster / Xie Yonghong in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 90, N° 6 (11-12/2006)
PermalinkA fast method to determine trace chromium(III) ion in chrome tanning and chrome tanning waste / Zhaoli Wang in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 88, N° 3 (05-06/2004)
PermalinkGaseous efficiency of methane fermentation of chromium-free tannery wastes / M. Urbaniak in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 91, N° 2 (03-04/2007)
PermalinkIntegrated pollution prevention and control for tanners within the European Union / Christiane Hauber in WORLD LEATHER, Vol. 15, N° 4 (06-07/2002)
PermalinkInteraction of aldehyde developed from amino acids of tannery waste in a lower - chrome tannage an eco-friendly approach / James Kanagaraj in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 89, N° 1 (01-02/2005)
PermalinkInvestigation on reducing chromium quantity in chromium containing wastes from leather industry using oyster mushroom (pleurotus ostreatus) / Eser Eke Bayramoglu in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA), Vol. CXV, N° 1 (01/2020)
PermalinkLack of inhibitory effect of chromium on anaerobic co-digestion of tannery solid wastes / Caroline Borges Agustini in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 101, N° 6 (11-12/2017)
PermalinkLeather powder as an agent for removing environmentally hazardous organic compounds / Anita Przepiórkowska in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 87, N° 6 (11-12/2003)
PermalinkMass reduction of tannery solid wastes by biodegradation / Caroline Borges Agustini in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 100, N° 5 (09-10/2016)
PermalinkMinimization of industrial wastes-adding value to collagenic : Adding value to collagenic materials procter memorial lecture / J. Cot in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 87, N° 3 (05-06/2003)
PermalinkA new generation of elastomers containing innovative biopolymers / Miroslawa Prochon in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 100, N° 1 (01-02/2016)
PermalinkNitrogen-free deliming and its effect on tannery effluent / B. Germann in WORLD LEATHER, Vol. 14, N° 6 (10/2001)
PermalinkNutrient balance in aerobic biological treatment of tannery wastewater / Jianfei Zhou in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA), Vol. CIX, N° 5 (05/2014)
PermalinkOptimisation of cationic starch modified bioflocculant for the removal of total nitrogen from tannery wastewater / Guangyu Ran in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 107, N° 4 (07-08/2023)
PermalinkA practical chrome recovery system using magnesium oxide / Anthony D. Covington in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 67 (Année 1983)
Permalink