Chrome sludge compost - Effects on crops and soils / Li Gui-Ju in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 90, N° 1 (01-02/2006)  

[article]  inJOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC) > Vol. 90, N° 1 (01-02/2006) . - p. 10-13 Titre : Chrome sludge compost - Effects on crops and soils Type de document : texte imprimé Auteurs : Li Gui-Ju, Auteur ; Zhang Chuan-Bo, Auteur ; Zhan Jing, Auteur ; Feng Wang, Auteur Année de publication : 2006 Article en page(s) : p. 10-13 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Agriculture Boues résiduaires Chrome trivalent -- Absorption Compostage Déchets -- Valorisation Engrais Mesure Tannage -- Déchets Index. décimale : 675.2 Préparation du cuir naturel. Tannage Résumé : Tannery sludge can contain 70% of organic substances which can have applications as a high-quality fertilizer, however, too high levels of chrome are a major obstacle for tannery sludge in agricultural applications. In this experiment, a study on chrome migration, transformation and resultant chrome levels has been done in the laboratory and expanded to using tannery sludge compost on agricultural land. These studies offer theoretical support for using tannery sludge. The experimental study shows that when Cr3+ levels in soil reach 250mg/kg, the plant absorption of chrome reaches the maximum value, which is 23.33mg/kg. The evidence shows that chrome loading of paddy field soil should be controlled to 350mg/kg. Note de contenu : - EXPERIMENT PROGRAMS AND RESEARCH METHOD : Effect on soil and wheat growth - Measurement techniques - Compost materials and experimental project - EXPERIMENTAL RESULTS AND DISCUSSION : Effect of chrome on wheat and in soil - Paddy rice comparison experiments - Table 1 : Present condition of tannery sludge treatment in China - Table 2 : Compost materials and experiment compost composition - Table 3 : Chrome content in wheat and soil as a function of concentration of chrome solution (mg/kg) - Table 4 : Biological production of wheat seedlings - Table 5 : Existence state of chrome in the tannery sludge - Table 6 : Main chemical constitutions of the compost with sludge and wheat straw - Table 7 : Chrome distribution in each part of paddy rice (mg/Kg-1) En ligne : https://drive.google.com/file/d/11ruWpVLjfp51cf-7AQufeSDxUHD26kOD/view?usp=share [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=39178 [article]

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Effect of zinc oxide and zinc oxide nanoparticles coating on urea diffusion and its release kinetics for design and development of slow-release fertilizer: an experimental and numerical investigation / Bilal Beig in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 21, N° 1 (01/2024)  

[article]  inJOURNAL OF COATINGS TECHNOLOGY AND RESEARCH > Vol. 21, N° 1 (01/2024) . - p. 199-213 Titre : Effect of zinc oxide and zinc oxide nanoparticles coating on urea diffusion and its release kinetics for design and development of slow-release fertilizer: an experimental and numerical investigation Type de document : texte imprimé Auteurs : Bilal Beig, Auteur ; Muhammad Bilal Khan Niazi, Auteur ; Baseer Ullah, Auteur ; Ahmed Nadeem Gondal, Auteur ; Zaib Jahan, Auteur ; Munir Zia, Auteur ; Ahmad Nouman, Auteur Année de publication : 2024 Article en page(s) : p. 199-213 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Eléments finis, Méthode des Engrais Nanoparticules Nutriments Oxyde de zinc Système de libération contrôlée (technologie) Urée Index. décimale : 667.9 Revêtements et enduits Résumé : Urea is the most applied nitrogenous fertilizer with 46% nitrogen (N) among available synthetic fertilizers. On the other hand, uncoated urea is subjected toward quick nutrient loss due to its higher solubility. This problematic issue could be addressed by applying slow-release fertilizer. The main aim behind this research was to model and simulate the nutrient release pattern from coated urea using zinc oxide (ZnO) as a micronutrient Zn source. A multidiffusional model was adopted for the simulation of prill fertilizer. During this study, finite element method and 2D geometry were utilized for prilled urea fertilizer using COMSOL multiphysics software. The second phase consisted of release kinetic study by using the experimental release data. In the present research, synergism was observed between the simulation and experimental results of nutrient release, with an error of 0.041. The dissolution curves of urea for simulation and experimental studies followed sigmoidal behavior. The results findings indicated that a second-order equation could be used to express the nutrient release from Zn coatings (ZnO or ZnO-NPs). Second-order kinetics express that nutrient release from Zn-coated urea was controlled by diffusion. Additionally, the second-order kinetic constant increases with raise in coating percentages which enhanced the mass transfer resistance. Note de contenu : - MATERIALS AND METHODS : Reagents - Synthesis of ZnO-NPs - Synthesis of SRF - Characterization of SRF - RESULTS AND DISCUSSION : Model validation with the experimental results - Slow release of urea in soil–water system - Nutrient release from ZnO-coated urea (2D) - Table 1 : Different kinetic models for nutrient release from slow-release fertilizer DOI : https://doi.org/10.1007/s11998-023-00810-6 En ligne : https://drive.google.com/file/d/1WGpF35ClyYMHn8WIPGPHeGEWc1muzMZq/view?usp=drive [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=40441 [article]

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Influence of chrome containing sludge on wheat crops and the soil / Yu Congzheng in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 88, N° 4 (07-08/2004)  

[article]  inJOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC) > Vol. 88, N° 4 (07-08/2004) . - p. 156-160 Titre : Influence of chrome containing sludge on wheat crops and the soil Type de document : texte imprimé Auteurs : Yu Congzheng, Auteur ; Gong Taisheng, Auteur ; Zhang Chuanbo, Auteur ; Ding Shaolan, Auteur ; Ma Hongrui Ren, Auteur Année de publication : 2004 Article en page(s) : p. 156-160 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Agriculture Boues résiduaires Engrais Sols -- Teneur en chrome Index. décimale : 675 Technologie du cuir et de la fourrure Résumé : The chrome content of soil fertilized with chrome containing sludge over a long term and the content of chrome in wheat grown from this soil were determined so as to confirm the influence of chrome containing sludge fertiliser. The different states of chrome existing in the soil were separated and their levels were determined. Note de contenu : - EXPERIMENTAL PROCEDURE : The influence of chrome containing sludge on soil - Mixed acid digestion method for chrome determination (Wet Method) : a) Dividing the existing states of chrome into four types - b) Determination of chrome states existing in soil - Influence of chrome containing sludge on wheat growing in the soil - APPENDIX : National standards - Control Standards for pollutants in sludges for agricultural use GB 4284 - 84 - Environmental quality standard for soils GB 15618 - 1995 - Table 1 : The number of sample and conditions in detail - Table 2 : Soil chrome content results in Yue Village for different layers - Table 3 : Total chrome in various states. Chrome contents in the soil of Yue Village - Table 4 : Chrome content in different parts of wheat plant En ligne : https://drive.google.com/file/d/1PoqQaMAW2Vw8RoiMix3fwBhbEKseFtWP/view?usp=drive [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=39630 [article]

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