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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The environmental effects of chromium in tannery effluents / Stephen A. J. Shivas in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA), Vol. LXXIII (Année 1978)  

[article]  inJOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA) > Vol. LXXIII (Année 1978) . - p. 370-377 Titre : The environmental effects of chromium in tannery effluents Type de document : texte imprimé Auteurs : Stephen A. J. Shivas, Auteur Année de publication : 1978 Article en page(s) : p. 370-377 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Boues résiduaires Chrome trivalent Chrome trivalent -- Oxydation Cuirs et peaux -- Industrie -- Aspect de l'environnement Eaux usées -- Teneur en chrome trivalent Environnement -- Etudes d'impact Membranes échangeuses d'ions Sols -- Chimie Sols -- Teneur en chrome Solubilité Index. décimale : 675 Technologie du cuir et de la fourrure Résumé : The chrome in tannery effluents is in the relatively nontoxic trivalent state, and not in sufficient concentrations to inhibit municipal sewage treatment. Municipal sludges applied to agricultural land could safely contain up to 500 ppm chrome. The final limitation of 112 ppm of chrome in soif is not realistic, since natural agricultural soils throughout the world contain more chrome than this. Adding chrome to the soil may even be beneficial, since many animal diets are chrome-deficient. Most leather is now tanned with chromium salts or vegetable and synthetic tannins and combinations of these (although considerable amounts of zirconium, alum, and glutaraldehyde are also in use). Since chromium is so widely used, it is important to consider the effects on the environment of the chemical state and concentrations in which it is discharged in tannery effluents and sludges. Note de contenu : - Chrome valencies - Properties of trivalent chrome - Solubility - Membrane permeability - Form of trivalent chrome in tannery effluent - Safe levels of trivalent chrome in biological oxidation - Effect of trivalent chrome in the soil - Chrome content in soils throughout the world - An alernative to tannery sludge disposal on agricultural land - Table 1 : Chromum content of digestedsludge from municipal sewage in sweden and Denmark En ligne : https://drive.google.com/file/d/1YWuHS1ywkVdcWCklq73zuP3ladianXaG/view?usp=drive [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=41156 [article]

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