Phytoremediation of soil using Sesuvium Portulacastrum - Part I / Swarna Vinodh Kanth in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA), Vol. CIV, N° 1 (01/2009)  

[article]  inJOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA) > Vol. CIV, N° 1 (01/2009) . - p. 17-24 Titre : Phytoremediation of soil using Sesuvium Portulacastrum - Part I : Removal of Na+ and Cl from tannery wastewater treated soil Type de document : texte imprimé Auteurs : Swarna Vinodh Kanth, Auteur ; R. Rengaswamy, Auteur ; Balachandran Unni Nair, Auteur ; Jonnalagadda Raghava Rao, Auteur ; P. Saravanan, Auteur ; A. Tamil Selvi, Auteur ; P. Ramesh Kannan, Auteur Année de publication : 2009 Article en page(s) : p. 17-24 Note générale : Bibliogr. Langues : Américain (ame) Index. décimale : 675.2 Préparation du cuir naturel. Tannage Résumé : Salt tolerant halophyte Sesuvium portulacastrum (S. portulacastrum) is capable of absorbing sodium chloride. In the present study, the feasibility of using S. portulacastrum as a bioaccumulant for NaCl present in tannery wastewater has been studied. The plants were grown in soil fed with tannery wastewater with varying concentrations of NaCl. The growth parameters of the plants such as root and shoot length was studied. The amount of Na+ and Cl- accumulated by the plant in leaves and shoots were estimated. The accumulation of Na+ and Cl- increased with increase in plant density and salt concentration of tannery wastewater. However, it has been found that increase in salt concentration resulted in reduced growth of the plant. It has been observed that 34% of Na+ and 22% of Cl- were absorbed by the plant at a NaCl concentration of 15000 ppm at high plant density conditions. Maximum accumulation of Na+ and Cl- has been observed in leaves compared to stems and shoots. The results of the present work indicate that S. portulacastrum can be used for bioaccumulation of sodium chloride. En ligne : https://drive.google.com/file/d/1-Sp4AQLByGyxpRwvhUU1mRn5vvEB8QKa/view?usp=drive [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=3251 [article]

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Phytoremediation of tannery wastewater treated lands : Part I : accumulation of Na+ and Ci- IN Salicornia Brachiata / P. Ramesh Kannan in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 93, N° 6 (11-12/2009)  

[article]  inJOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC) > Vol. 93, N° 6 (11-12/2009) . - p. 233-239 Titre : Phytoremediation of tannery wastewater treated lands : Part I : accumulation of Na+ and Ci- IN Salicornia Brachiata Type de document : texte imprimé Auteurs : P. Ramesh Kannan, Auteur ; R. Rengasamy, Auteur ; C. S. Gnanasekaran, Auteur ; Jonnalagadda Raghava Rao, Auteur ; B. Chandrasekaran, Auteur ; Swarna Vinodh Kanth, Auteur Année de publication : 2009 Article en page(s) : p. 233-239 Note générale : Bibliogr. Langues : Anglais (eng) Index. décimale : 675.2 Préparation du cuir naturel. Tannage Résumé : In the present study, we studied the feasibility of using Salicornia brachiata as a phytoremediant for accumulation of NaCl present in tannery wastewater. The plants were grown in pots fed with tannery wastewater with varying concentrations of NaCl. The accumulation of Na+ and Cl- increased with increase in salt concentration of tannery wastewater offered to the plant. The growth of the plants with respect to root and shoot length decreased with an increase in salt concentration. However, the accumulation of Na+ and Cl- increased with time of growth and plant density. 51 % of Na+ and 33 % of Cl- were absorbed by the plant at an NaCl concentration of 20 000 ppm at high plant density conditions. Based on the results of trials, Salicornia brachiata was grown on open lands in Tamil Nadu State, India where tannery wastewater was discharged. The TDS levels of the land decreased from 10 300 ppm to 5500 ppm at the end of one year by the growth of S. brachiata. The maximum accumulation of Na+ and Cl- was observed during the period July to September. The results of the present work indicate that S. brachiata ca be used to accumulation of sodium chloride from tannery wastewater discharged lands, thereby contributing towards solving TDS problem arising from the leather sector. En ligne : https://drive.google.com/file/d/1uLOzF0kWyqK0Ok-ZqGMU8Z60vjqdK4ya/view?usp=drive [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=7345 [article]

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Phytoremediation of tannery wastewater treated lands : Part II : Using harvested Salicornia Brachiata plants for the preservation of sheepskins / P. Ramesh Kannan in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 93, N° 6 (11-12/2009)  

[article]  inJOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC) > Vol. 93, N° 6 (11-12/2009) . - p. 240-244 Titre : Phytoremediation of tannery wastewater treated lands : Part II : Using harvested Salicornia Brachiata plants for the preservation of sheepskins Type de document : texte imprimé Auteurs : P. Ramesh Kannan, Auteur ; Jonnalagadda Raghava Rao, Auteur ; Swarna Vinodh Kanth, Auteur ; Arjunan Yasothai, Auteur ; S. Deepa, Auteur ; B. Chandrasekaran, Auteur Année de publication : 2009 Article en page(s) : p. 240-244 Note générale : Bibliogr. Langues : Anglais (eng) Index. décimale : 675.2 Préparation du cuir naturel. Tannage Résumé : In this study, preservation of sheepskins using the harvested Salicornia brachiata from tannery wastewater treated lands was used as a replacement for salt in the curing process. Treatment of raw sheepskins using S. brachiata at a concentration of 10 % dry weight resulted in effective preservation at ambient temperature. The extractable nitrogen, content was found to be 3.42 mg/g at an optimized concentration of 10 % S. brachiata. Bacterial count, moisture content, shrinkage temperature, visual and physical properties of Salicornia brachiata preserved skins was comparable to that of conventional salt cured method. The antimicrobial metabolite available in the essential oils and the salt present in the plant has resulted in effective preservation of the skins. The quality of the plant preserved skins was found to be on par with that of salt cured skin. The quality of the resultant crust leathers prepared from S. brachiata preserved skins was found to be comparable with control leathers. En ligne : https://drive.google.com/file/d/1k9859CJ1N7WcoSgsdS8Wm0jF_k4ttZpK/view?usp=drive [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=7346 [article]

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Studies on the use of enzymes in tanning process : Part I. High exhaust vegetable tanning / Swarna Vinodh Kanth in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA), Vol. CIV, N° 12 (12/2009)  

[article]  inJOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA) > Vol. CIV, N° 12 (12/2009) . - p. 405-415 Titre : Studies on the use of enzymes in tanning process : Part I. High exhaust vegetable tanning Type de document : texte imprimé Auteurs : Swarna Vinodh Kanth, Auteur ; P. Ramesh Kannan, Auteur ; N. Usharani, Auteur ; Gladstone Christopher Jayakumar, Auteur ; Arjunan Yasothai, Auteur ; B. Chandrasekaran, Auteur Année de publication : 2009 Article en page(s) : p. 405-415 Note générale : Bibliogr. Langues : Américain (ame) Index. décimale : 675.2 Préparation du cuir naturel. Tannage Résumé : In the present investigation, an attempt was made to design an eco-friendly vegetable tanning process without pickling process by the application of enzymes to improve the exhaustion of vegetable tannins. Such an approach has resulted in more than 97% tannin exhaustion in the case of the experimental process, an increase of 12% compared with the conventional vegetable tanning process. The tanned leathers showed an improvement in hydrothermal stability, surface color values and there is no surface deposition of tannins in the experimental leathers, although vegetable tanning was carried out at higher pH. This was substantiated through scanning electron microscopic analysis that resulted in opened up, split compact fiber structure that was well coated by tannins, indicating that the enzyme assisted tanning process did not bring about any major change or destruction on the fiber structure of the leathers. The enzyme assisted tanning process is efficient in terms of improved quality of leather and also led to reduction in total solids (TS), chlorides and COD loads. The enzyme assisted tanning system presented here appears to be a viable option for combating pollution arising from the conventional vegetable tanning system. En ligne : https://drive.google.com/file/d/1iw2VRewyhADrO0ti5LQ3pHM9NjRvXzHH/view?usp=drive [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=7430 [article]

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Studies on the use of enzymes in tanning process : Part II. Kinetics of vegetable tanning process / Swarna Vinodh Kanth in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA), Vol. CV, N° 1 (01/2010)  

[article]  inJOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA) > Vol. CV, N° 1 (01/2010) . - p. 16-24 Titre : Studies on the use of enzymes in tanning process : Part II. Kinetics of vegetable tanning process Type de document : texte imprimé Auteurs : Swarna Vinodh Kanth, Auteur ; B. Chandrasekaran, Auteur ; S. Deepa, Auteur ; Gladstone Christopher Jayakumar, Auteur ; N. Usharani, Auteur ; P. Ramesh Kannan, Auteur Année de publication : 2010 Article en page(s) : p. 16-24 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Acacia et constituants Cuirs et peaux Eaux usées -- Analyse Enzymes Une enzyme est une protéine dotée de propriétés catalytiques. Pratiquement toutes les biomolécules capables de catalyser des réactions chimiques dans les cellules sont des enzymes ; certaines biomolécules catalytiques sont cependant constituées d'ARN et sont donc distinctes des enzymes : ce sont les ribozymes. Une enzyme agit en abaissant l'énergie d'activation d'une réaction chimique, ce qui accroît la vitesse de réaction. L'enzyme n'est pas modifiée au cours de la réaction. Les molécules initiales sont les substrats de l'enzyme, et les molécules formées à partir de ces substrats sont les produits de la réaction. Presque tous les processus métaboliques de la cellule ont besoin d'enzymes pour se dérouler à une vitesse suffisante pour maintenir la vie. Les enzymes catalysent plus de 5 000 réactions chimiques différentes2. L'ensemble des enzymes d'une cellule détermine les voies métaboliques qui peuvent avoir lieu dans cette cellule. L'étude des enzymes est appelée enzymologie. Les enzymes permettent à des réactions de se produire des millions de fois plus vite qu'en leur absence. Un exemple extrême est l'orotidine-5'-phosphate décarboxylase, qui catalyse en quelques millisecondes une réaction qui prendrait, en son absence, plusieurs millions d'années3,4. Comme tous les catalyseurs, les enzymes ne sont pas modifiées au cours des réactions qu'elles catalysent, et ne modifient pas l'équilibre chimique entre substrats et produits. Les enzymes diffèrent en revanche de la plupart des autres types de catalyseurs par leur très grande spécificité. Cette spécificité découle de leur structure tridimensionnelle. De plus, l'activité d'une enzyme est modulée par diverses autres molécules : un inhibiteur enzymatique est une molécule qui ralentit l'activité d'une enzyme, tandis qu'un activateur de cette enzyme l'accélère ; de nombreux médicaments et poisons sont des inhibiteurs enzymatiques. Par ailleurs, l'activité d'une enzyme décroît rapidement en dehors de sa température et de son pH optimums. Epuisement des tanins Tannage végétal Index. décimale : 675.2 Préparation du cuir naturel. Tannage Résumé : In the present investigation, an attempt was made to design an eco-friendly vegetable tanning process without pickling process by the application of enzymes to improve the exhaustion of vegetable tannins. Such an approach has resulted in more than 97% tannin exhaustion in the case of the experimental process, an increase of 12% compared with the conventional vegetable tanning process. The tanned leathers showed an improvement in hydrothermal stability, surface color values and there is no surface deposition of tannins in the experimental leathers, although vegetable tanning was carried out at higher pH. This was substantiated through scanning electron microscopic analysis that resulted in opened up, split compact fiber structure that was well coated by tannins, indicating that the enzyme assisted tanning process did not bring about any major change or destruction on the fiber structure of the leathers. The enzyme assisted tanning process is efficient in terms of improved quality of leather and also led to reduction in total solids (TS), chlorides and COD loads. The enzyme assisted tanning system presented here appears to be a viable option for combating pollution arising from the conventional vegetable tanning system. Note de contenu : - EXPERIMENTAL : Reagents and chemicals - Experimental trials - Control tanning process - Enzyme assisted tanning process - Analysis of exhaustion of vegetable tanning spent liquors - RESULTS AND DISCUSSIONS : Absorption studies - Absorption kinetics of enzyme assisted vegetable tanning - Absorption rate constants of control and enzyme assisted tanned leathers - Absorption rate constant and correlation constants at different temperatures of control and enzyme assisted leather - Apparent activation energies of control and enzyme treated leathers - Relative tannin uptake of control and enzyme treated leathers - Table 1 : Control and experimental vegetable tanning process - Table 2 : Absorption rate constant (K) and correlation constants (r2) for wattle - vegetable tannin (fit to empirical equations) of control and enzyme pretreated leathers - Table 3 : Absorption rate constant (K) and correlation constant (r2) for vegetable tanning withwattle at different temperatures of control and enzyme preated leathers - Table 4 : Apparent activation energies and correlation constant (r2) of vegetable tanned control and enzyme pretreated leathers En ligne : https://drive.google.com/file/d/1mc6tNAnuJmvHfvRNOBBGoGk9rZ9UOu0C/view?usp=drive [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=8084 [article]

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Studies on the use of sesuvium portulacastrum - Part III : Phytoremediation of salt contaminated soils of tannery wastewater discharged lands / P. Ramesh Kannan in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA), Vol. CIV, N° 12 (12/2009)  

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