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Determination of adsorption isotherm models for the biosorption of chromium using cherry leaves (Muntingia calabura L.)

100%

Aathithya R., Sowparnika J. R., Balakrishnan V.

International Letters of Natural Sciences

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2014

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tom 20

Contaminations of industrial metals into the river possess major threat to environment. Chromium is a heavy metal which has the wide applications in tannery and electroplating industries. Above the permitted level of Chromium(VI) into surface water leads to severe health hazards. Therefore, biosorption is a technology used for the sorption of heavy metal. In this present study adsorption isotherm models was studied for the biosorption of chromium by cherry leaves. From the adsorption isotherms it was found that the experimental data fits well with the Langmuir isotherm than the Freundlich isotherm. The monolayer capacity Qm was fond to be 11.98 mg/l and the adsorption affinity was found to be positive which indicates the efficient biosorption of chromium.

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Evaluation of thermodynamic properties for the biosorption of chromium by using cherry leaves (Muntingia calabura L.)

100%

Aathithya R., Sowparnika J. R., Balakrishnan V.

International Letters of Natural Sciences

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2014

|

tom 20

Chromium is a heavy metal which has widely used in tannery and electroplating industries. Contaminations of these industrial metals into the river possess major threat to an environment. Therefore, biosorption is a technique which is applied for the sorption of heavy metal by a biomaterial. In the present study reveals that cherry leaves was used as a biomaterial and for that the thermodynamic properties was evaluated for the biosorption of chromium. From the thermodynamic studies it was found that the reaction was feasible, spontaneous and exothermic because the values of ΔG = negative, ΔS = negative and ΔH = positive. So, it was concluded that the experiment was thermodynamically feasible.

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Kinetic studies for the biosorption of chromium using cherry leaves (Muntingia calabura L.)

100%

Aathithya R., Sowparnika J. R., Balakrishnan V.

International Letters of Natural Sciences

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2014

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tom 20

Biosorption is an attractive technology which is used for the sorption of substances by a biomaterial. In this present work the heavy metal chromium was subjected to biosorption because of their non-degradability nature and causes water and land pollution. Cherry leaves were used as a biomaterial for the biosorption. Kinetic studies were performed for the biosorption experiment. From the experiment it was found that the reaction follows pseudo first order reaction because of the larger value of regression coefficient R2 and lower value of standard errors (χ2) for pseudo first order reaction than second order reaction.

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Phytochemical screening of Justicia simplex D. Don a valuable medicinal plant extract against dental pathogens

88%

Eswari M. G., Rathi R. L., Harini J., Aruna R., Balakrishnan V.

International Letters of Natural Sciences

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2014

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tom 16

The plant Justicia simplex D.Don is traditional herb, people used it in different diseases, they treat fever and burning of the body, strengthen the lungs, the teeth and stop vomiting. The plant exhibited more promising bacterial activity against various microorganisms. Hence, in the present study this plant is also tested against the dental pathogens. The plant was extracted from four different solvents was tested for the presence of phytochemicals in it. After analyzing, its antimicrobial activity is tested against fungi and bacteria. Then a dental carrier Streptococcus aureus, Klebsiella pneumonia, Escherichia coli and Pseudomonas aeruginosa which was collected from the K.S.R. Institute for Dental Science and Research. The isolates were used to check the activity against Justicia simplex D.Don. Based on the positive result obtained against various analyses, it is formulated successfully into a tooth paste. The present study on Phytochemical screening of Justicia simplex D.Don a valuable medicinal plant extract against Dental pathogens enables the use of this plant for the formulation of tooth powder against dental pathogens. The result is more effective against dental pathogens by herbal tooth powder.

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Mercury induced oxidative stress of antioxidants in Clitoria ternatea L.

88%

Priya M., Balakrishnan V., Kiruthika Lakshmi A., Aruna R., Ravindran K. C.

International Letters of Natural Sciences

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2014

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tom 18

Biofertilizers are the special formulation of specific beneficial microorganisms that promote the growth of plant crops by converting the unavailable form of nutrients into available form. Here, the effect of heavy metal stress on antioxidant enzymes were studied in Clitoria ternatea L. leaves. Clitoria ternatea L. plant was grown for 30 days and the heavy metal mercuric chloride was sprayed after 10 days from the date of planting. Effect of mercuric chloride was observed in treated plants. The selected plant Clitoria ternatea L. was grown under mercuric chloride treatment in a specified concentration 1 μg/10 ml. The control plant maintained without the treatment of mercuric chloride. Antioxidant effect of mercuric chloride was measured under controlled and treated conditions. The selected plant Clitoria ternatea L. was grown under mercuric chloride in treatment. Further it increases H2O2 content and the antioxidant enzyme activities such as superoxide dismutase (SOD), catalase (CAT), and peroxidase (POD) were observed in mercuric chloride treated plants when compared with control. Here mercuric chloride was accumulated more in matured leaves. The results are discussed with the literature.

Ograniczanie wyników

5 International Letters of Natural Sciences

5 Balakrishnan V.

3 Aathithya R.

3 Sowparnika J. R.

2 Aruna R.

1 Eswari M. G.

1 Harini J.

1 Kiruthika Lakshmi A.

1 Priya M.

1 Rathi R. L.

1 Ravindran K. C.

5 2014

Determination of adsorption isotherm models for the biosorption of chromium using cherry leaves (Muntingia calabura L.)

Evaluation of thermodynamic properties for the biosorption of chromium by using cherry leaves (Muntingia calabura L.)

Kinetic studies for the biosorption of chromium using cherry leaves (Muntingia calabura L.)

Phytochemical screening of Justicia simplex D. Don a valuable medicinal plant extract against dental pathogens

Mercury induced oxidative stress of antioxidants in Clitoria ternatea L.