TamilNadu Pollution Control Board

Guindy, India

TamilNadu Pollution Control Board

Guindy, India

Time filter

Source Type

Suganya S.,SSN College of Engineering | Kayalvizhi K.,Tamilnadu Pollution Control Board | Senthil Kumar P.,SSN College of Engineering | Saravanan A.,SSN College of Engineering | Vinoth Kumar V.,SRM University
Desalination and Water Treatment | Year: 2016

The adsorption of Pb(II), Ni(II), and Cr(VI) ions onto Rhizoclonium tortuosum (RT) was investigated in a batch mode operation. The two parameter (Langmuir and Freundlich) and three parameter models (Redlich–Peterson and Sips isotherm model) were used to depict the adsorption of metal ions onto R. tortuosum. Sips isotherm model was provided the best fit to the adsorption equilibrium data. The adsorption kinetics was described by the pseudo-first-order, pseudo-second-order, and Elovich kinetic models. The pseudo-second-order model provides the best fit. The maximum monolayer adsorption capacity of the RT were found to be 66.08, 85.09, and 61.45 mg/g for Pb(II), Ni(II), and Cr(VI), respectively. The thermodynamic results showed that the adsorption process was endothermic, feasible, and spontaneous in nature. The ability of RT to remove the Ni(II) ions in column studies was explored. The effect of bed height, flow rate, and initial Ni(II) ion concentration were studied. The dynamic behavior of the column performance was studied using the bed depth service time (BDST) and Thomas models. This research was also further extended to treat the nickel contaminated plating industrial wastewater. The results showed that the RT can be utilized as better biosorbent for the removal of metal ions from industrial wastewater. © 2016 Balaban Desalination Publications. All rights reserved.


Vijayalakshmi P.,TamilNadu Pollution Control Board | Raju G.B.,CSIR - Central Electrochemical Research Institute | Gnanamani A.,CSIR - Central Leather Research Institute
Industrial and Engineering Chemistry Research | Year: 2011

The option of electro-oxidation and advanced oxidation as tertiary treatment technique for the purification of tannery wastewater was explored. The TOC removal of 85% was achieved by UV/O3/H2O2 process, whereas it is hardly 50% by electr-ooxidation. However the power consumption to remove unit mass of TOC by electro-oxidation process was estimated to be 738 kW h/kg, which is ten times less than that of 7600 kW h/kg, required for advanced oxidation process. The kinetic data indicated that the degradation of organics by electro-oxidation is a current control process. To minimize the power consumption, we attempted a two-stage process involving electro-oxidation in the first stage and advanced oxidation in the second stage. The results indicated that the TOC removal by advanced oxidation became sluggish, when the wastewater was processed initially by electro-oxidation. However, the effluents processed by EO were found to be completely disinfected. © 2011 American Chemical Society.


Prakash Maran J.,Kongu Engineering College | Sivakumar V.,Kongu Engineering College | Thirugnanasambandham K.,Kongu Engineering College | Sridhar R.,TamilNadu Pollution Control Board
Carbohydrate Polymers | Year: 2013

In this study, microwave-assisted extraction was applied for pectin extraction from the dried orange peel and Box-Behnken response surface design was used to study and optimize the effects of processing variables (microwave power, irradiation time, pH and solid-liquid ratio) on the yield of pectin. The amount of pectin extracted increased with increasing microwave power, while it reduces as the time, pH and solid-liquid ratio increased. From the results, second order polynomial model was developed and it adequately explained the data variation and significantly represented the actual relationship between independent variables and the response. An optimization study using Derringer's desired function methodology was performed and optimal conditions based on both individual and combinations of all independent variables (microwave power of 422 W, irradiation time of 169 s, pH of 1.4 and solid-liquid ratio of 1:16.9 g/ml) were determined with maximum pectin yield of 19.24%, which was confirmed through validation experiments. © 2013 Elsevier Ltd. All rights reserved.


Kayalvizhi K.,Tamilnadu Pollution Control Board | Vijayaraghavan K.,Indian Institute of Technology Madras | Velan M.,Anna University
Desalination and Water Treatment | Year: 2014

Heavy metal pollution is a major environmental concern in many countries. Among heavy metals, chromium is one of the widely used despite being one of the most toxic metal ions. The present study deals with the evaluation of Cr(VI) biosorption using a novel fresh water alga Rhizoclonium hookeri. Batch experiments were conducted and the maximum adsorption capacity was evaluated as 67.3 mg/g at pH 2 at a biomass dosage of 1 g/L and 1,000 mg/L initial Cr(VI) concentration. Fourier transform infrared spectroscopy analysis of alga before and after biosorption revealed a shift in the carboxylic O-H stretching vibration from 3,401 to 3,373 cm-1, which confirmed its involvement in biosorption of Cr(VI) by R. hookeri. Surface morphology of alga was examined using the scanning electron microscopy, which indicated the highly porous nature of biomass. Non-linear regression analyses of isotherm models revealed that the three-parameter model isotherms (Redlich-Peterson and Sips) better described the experimental data compared with two-parameter model isotherms (Langmuir and Freundlich). An analysis of the kinetic models (pseudo-first-order, pseudo-second-order and Elovich models) indicated that the experimental data followed pseudo-second-order kinetics. The thermodynamic parameters such as free energy, enthalpy and entropy were calculated and Cr(VI) biosorption was found to be a spontaneous and endothermic process. © 2014 © 2014 Balaban Desalination Publications. All rights reserved.


Prakash Maran J.,Kongu Engineering College | Sivakumar V.,Kongu Engineering College | Thirugnanasambandham K.,Kongu Engineering College | Sridhar R.,TamilNadu Pollution Control Board
International Journal of Biological Macromolecules | Year: 2013

In this work, four factors with three level Box-Behnken response surface design was employed to investigate the influence of process variables (maize starch, sorbitol, agar and Tween-80) on the barrier (water vapor permeability, oxygen permeability, thickness, moisture content and solubility) and optical (transparency) properties of the maize starch based edible films. Casting method was employed to prepare the edible films. The results showed that, addition of sorbitol and Tween-80 reduces the water vapor and oxygen permeability of the films, its due to the reduction of molecular mobility between polymer matrixes, where as, it also increases the thickness, moisture content, solubility and transparency of the films. The results were analyzed using Pareto analysis of variance (ANOVA) and second-order polynomial models are developed for all responses in order to predict the effect of process variables over the barrier and optical properties of the films. © 2013 Elsevier B.V.


Prakash Maran J.,Kongu Engineering College | Sivakumar V.,Kongu Engineering College | Thirugnanasambandham K.,Kongu Engineering College | Sridhar R.,TamilNadu Pollution Control Board
Food Science and Biotechnology | Year: 2014

An aqueous extraction technique was applied to optimize the extraction process variables of temperature (40°C-60°C), time (20-100 min), and the solid-to-liquid ratio (1:10-1:15) using a Box-Behnken experimental design and response surface methodology. Maximum extraction yields of total phenolics and flavonoids, and anti-oxidant activities were obtained from Indian jamun fruit. Effects of the extraction temperature and the solid-toliquid ratio were found to be significant (p<0.05) for all responses. Second order polynomial models were developed from experimental data to predict the effects of the independent variables on the responses. Optimum extraction conditions (temperature of 54°C, time of 50 min, and a solid-to-liquid ratio of 1:8.5) for the maximum extraction yield of total phenolics (1,332.36 mg GAE/100 g) and flavonoids (110.94 mg QE/100 g), and the anti-oxidant activity (233.55mg AAE/100 g) were achieved. Experimental values matched well with predicted values obtained under optimum conditions. © 2014 The Korean Society of Food Science and Technology and Springer Science+Business Media Dordrecht.


Gomathy G.,Tamil University | Gomathy G.,Valliammal College for Women | Vijay T.,SMK Fomra Institute of Technology | Sarumathy K.,TamilNadu pollution control board | And 2 more authors.
Journal of Applied Pharmaceutical Science | Year: 2012

The investigation was carried out to determine the qualitative analysis of phytochemical screening and possible chemical components of Mukia maderaspatana (L.) (family: Cucurbitaceae), leaves GC-MS. The plant is an indigenous plant; traditionally it is used as an ingredient of various cocktail preparations and for the management of severe inflammatory disorders in Indian system of medicine. GC-MS analysis of hydroalcoholic extract lead to identification of 7 compounds. This analysis revealed that contains Mukia maderaspatana (L.) leaves mainly Dichloroacetic acid, 4-methylpentyl ester, 2-Butyn-1-ol, 4-methoxy and also showed the presence of other constituents like flavonoids, saponins, carbohydrates, steroids, tannins and phenolic compounds.


Jeganathan P.M.,Kongu Engineering College | Venkatachalam S.,Kongu Engineering College | Karichappan T.,Kongu Engineering College | Ramasamy S.,TamilNadu Pollution Control Board
Preparative Biochemistry and Biotechnology | Year: 2014

The objective of the present study is to find out the optimum extraction conditions for extraction of polyphenols from red grapes using Box-Behnken design. Red grapes polyphenols were extracted using acid-ethanol solvent at various extraction temperature (40-60°C), extraction time (20-100 min) and different solid-liquid ratio (1:5-1:15 g:ml). The effect (main and interactive) of extraction conditions on total anthocyanin, phenolic and flavonoid content were studied using Box-Behnken design (three factors at three levels). The results showed that the contribution of the quadratic model was significant for all the responses. Second-order mathematical regression models were developed and were found to fit well with observed data. Derringer's desirability function methodology was performed to find out the optimal conditions based on both individual and combinations of all responses (extraction temperature: 57°C, time: 61 min, and solid-liquid ratio: 1:8.7 g:ml) were established. At this optimal condition, the anthocyanin yield, total phenolic and flavonoid content were 73.92 mg/100 g, 221.4 mg GAE/100 g, and 79.08 mg CE/100 g, respectively. A desirability value of 0.902 was achieved at this point. Copyright © Taylor and Francis Group, LLC.


Maran J.P.,Kongu Engineering College | Sivakumar V.,Kongu Engineering College | Thirugnanasambandham K.,Kongu Engineering College | Sridhar R.,TamilNadu Pollution Control Board
Journal of Food Science and Technology | Year: 2015

In this present study, natural pigment and colors from pulp of jamun fruit were extracted under different extraction conditions such as extraction temperature (40–60 ˚C), time (20–100 min) and solid–liquid ratio (1:10–1: 15 g/ml) by aqueous extraction method. Three factors with three levels Box-Behnken response surface design was employed to optimize and investigate the effect of process variables on the responses (total anthocyanin and color). The results were analyzed by Pareto analysis of variance (ANOVA) and second order polynomial models were developed to predict the responses. Optimum extraction conditions for maximizing the extraction yield of total anthocyanin (10.58 mg/100 g) and colors (10618.3 mg/l) were found to be: extraction temperature of 44 °C, extraction time of 93 min and solid–liquid ratio of 1:15 g/ml. Under these conditions, experimental values are closely agreed with predicted values. © 2014, Association of Food Scientists & Technologists (India).


PubMed | TamilNadu Pollution Control Board and Kongu Engineering College
Type: Journal Article | Journal: Journal of food science and technology | Year: 2015

In this present study, natural pigment and colors from pulp of jamun fruit were extracted under different extraction conditions such as extraction temperature (40-60 C), time (20-100min) and solid-liquid ratio (1:10-1: 15g/ml) by aqueous extraction method. Three factors with three levels Box-Behnken response surface design was employed to optimize and investigate the effect of process variables on the responses (total anthocyanin and color). The results were analyzed by Pareto analysis of variance (ANOVA) and second order polynomial models were developed to predict the responses. Optimum extraction conditions for maximizing the extraction yield of total anthocyanin (10.58mg/100g) and colors (10618.3mg/l) were found to be: extraction temperature of 44C, extraction time of 93min and solid-liquid ratio of 1:15g/ml. Under these conditions, experimental values are closely agreed with predicted values.

Loading TamilNadu Pollution Control Board collaborators
Loading TamilNadu Pollution Control Board collaborators