(180o) PVA-Silica Aerogel and Its Application in Wastewater Treatment

PVA-Silica Aerogel and Its Application in Wastewater Treatment

Subhasis Ghosh^1,2, Tapas Das^3*, Papita Das^1,2

¹ Department of Chemical Engineering, Jadavpur University, Kolkata, West Bengal, India.

² School of Advanced Studies in Industrial Pollution Control Engineering, Jadavpur University, Kolkata, West Bengal, India.

³ Hal and Inge Marcus School of Engineering, Saint Martin’s University, Washington, USA.

^* Presenting author.

Contact information:

Subhasis Ghosh: subhasisghosh1604@gmail.com

Tapas Das: shivaniki@comcast.net

Papita Daspapita.das@jadavpuruniversity.in

Abstract: In the current scenario, besides dyes and heavy metals, polycyclic aromatic hydrocarbons (PAHs) are appearing as one of the most concerning pollutants. PAHs are a class of uncharged, non-polar and planar hydrocarbons that contain multiple aromatic rings. The harmful effects caused by these pollutants, viz., mutagenicity, carcinogenicity, and toxicity, show adverse effects on the biosphere. Considering that problem, this research focuses on the removal of those compounds by using PVA-Silica aerogels while studying the effect of different parameters, viz., adsorbent dose, concentration of pollutants, pH of solution and temperature of the environment. The main objective of this research is to synthesize PVA-Silica aerogels and investigate their role in naphthalene removal from aqueous solution. For this study, silica was extracted from rice husk by the acid precipitation method and incorporated into the PVA network of the aerogel. The highest removal of naphthalene was observed as 94.18% at 40 ^oC temperature, pH 7, with the adsorbent dose of 2 g/L for 5 mg/L. concentration of solution. From the isotherm analysis, it was observed that the adsorption best fitted with the Freundlich isotherm model with an R² value of 0.99. From the kinetics study, it can be stated that the adsorption process follows the Pseudo-2^nd-order kinetic model with an R² value of 0.99. From the thermodynamic analysis, it was found that the adsorption process is spontaneous and endothermic in nature.

PVA-Silica Aerogel and Its Application in Wastewater Treatment

Subhasis Ghosh^1,2, Tapas Das^3*, Papita Das^1,2

¹ Department of Chemical Engineering, Jadavpur University, Kolkata, West Bengal, India.

² School of Advanced Studies in Industrial Pollution Control Engineering, Jadavpur University, Kolkata, West Bengal, India.

³ Hal and Inge Marcus School of Engineering, Saint Martin’s University, Washington, USA.

^* Presenting author.

Contact information:

Subhasis Ghosh: subhasisghosh1604@gmail.com

Tapas Das: shivaniki@comcast.net

Papita Daspapita.das@jadavpuruniversity.in

Abstract: In the current scenario, besides dyes and heavy metals, polycyclic aromatic hydrocarbons (PAHs) are appearing as one of the most concerning pollutants. PAHs are a class of uncharged, non-polar and planar hydrocarbons that contain multiple aromatic rings. The harmful effects caused by these pollutants, viz., mutagenicity, carcinogenicity, and toxicity, show adverse effects on the biosphere. Considering that problem, this research focuses on the removal of those compounds by using PVA-Silica aerogels while studying the effect of different parameters, viz., adsorbent dose, concentration of pollutants, pH of solution and temperature of the environment. The main objective of this research is to synthesize PVA-Silica aerogels and investigate their role in naphthalene removal from aqueous solution. For this study, silica was extracted from rice husk by the acid precipitation method and incorporated into the PVA network of the aerogel. The highest removal of naphthalene was observed as 94.18% at 40 ^oC temperature, pH 7, with the adsorbent dose of 2 g/L for 5 mg/L. concentration of solution. From the isotherm analysis, it was observed that the adsorption best fitted with the Freundlich isotherm model with an R² value of 0.99. From the kinetics study, it can be stated that the adsorption process follows the Pseudo-2^nd-order kinetic model with an R² value of 0.99. From the thermodynamic analysis, it was found that the adsorption process is spontaneous and endothermic in nature.

PVA-Silica Aerogel and Its Application in Wastewater Treatment

Subhasis Ghosh^1,2, Tapas Das^3*, Papita Das^1,2

¹ Department of Chemical Engineering, Jadavpur University, Kolkata, West Bengal, India.

² School of Advanced Studies in Industrial Pollution Control Engineering, Jadavpur University, Kolkata, West Bengal, India.

³ Hal and Inge Marcus School of Engineering, Saint Martin’s University, Washington, USA.

^* Presenting author.

Contact information:

Subhasis Ghosh: subhasisghosh1604@gmail.com

Tapas Das: shivaniki@comcast.net

Papita Daspapita.das@jadavpuruniversity.in

Abstract: In the current scenario, besides dyes and heavy metals, polycyclic aromatic hydrocarbons (PAHs) are appearing as one of the most concerning pollutants. PAHs are a class of uncharged, non-polar and planar hydrocarbons that contain multiple aromatic rings. The harmful effects caused by these pollutants, viz., mutagenicity, carcinogenicity, and toxicity, show adverse effects on the biosphere. Considering that problem, this research focuses on the removal of those compounds by using PVA-Silica aerogels while studying the effect of different parameters, viz., adsorbent dose, concentration of pollutants, pH of solution and temperature of the environment. The main objective of this research is to synthesize PVA-Silica aerogels and investigate their role in naphthalene removal from aqueous solution. For this study, silica was extracted from rice husk by the acid precipitation method and incorporated into the PVA network of the aerogel. The highest removal of naphthalene was observed as 94.18% at 40 ^oC temperature, pH 7, with the adsorbent dose of 2 g/L for 5 mg/L. concentration of solution. From the isotherm analysis, it was observed that the adsorption best fitted with the Freundlich isotherm model with an R² value of 0.99. From the kinetics study, it can be stated that the adsorption process follows the Pseudo-2^nd-order kinetic model with an R² value of 0.99. From the thermodynamic analysis, it was found that the adsorption process is spontaneous and endothermic in nature.

PVA-Silica Aerogel and Its Application in Wastewater Treatment

Subhasis Ghosh^1,2, Tapas Das^3*, Papita Das^1,2

¹ Department of Chemical Engineering, Jadavpur University, Kolkata, West Bengal, India.

² School of Advanced Studies in Industrial Pollution Control Engineering, Jadavpur University, Kolkata, West Bengal, India.

³ Hal and Inge Marcus School of Engineering, Saint Martin’s University, Washington, USA.

^* Presenting author.

Contact information:

Subhasis Ghosh: subhasisghosh1604@gmail.com

Tapas Das: shivaniki@comcast.net

Papita Daspapita.das@jadavpuruniversity.in

Abstract: In the current scenario, besides dyes and heavy metals, polycyclic aromatic hydrocarbons (PAHs) are appearing as one of the most concerning pollutants. PAHs are a class of uncharged, non-polar and planar hydrocarbons that contain multiple aromatic rings. The harmful effects caused by these pollutants, viz., mutagenicity, carcinogenicity, and toxicity, show adverse effects on the biosphere. Considering that problem, this research focuses on the removal of those compounds by using PVA-Silica aerogels while studying the effect of different parameters, viz., adsorbent dose, concentration of pollutants, pH of solution and temperature of the environment. The main objective of this research is to synthesize PVA-Silica aerogels and investigate their role in naphthalene removal from aqueous solution. For this study, silica was extracted from rice husk by the acid precipitation method and incorporated into the PVA network of the aerogel. The highest removal of naphthalene was observed as 94.18% at 40 ^oC temperature, pH 7, with the adsorbent dose of 2 g/L for 5 mg/L. concentration of solution. From the isotherm analysis, it was observed that the adsorption best fitted with the Freundlich isotherm model with an R² value of 0.99. From the kinetics study, it can be stated that the adsorption process follows the Pseudo-2^nd-order kinetic model with an R² value of 0.99. From the thermodynamic analysis, it was found that the adsorption process is spontaneous and endothermic in nature.

PVA-Silica Aerogel and Its Application in Wastewater Treatment

Subhasis Ghosh^1,2, Tapas Das^3*, Papita Das^1,2

¹ Department of Chemical Engineering, Jadavpur University, Kolkata, West Bengal, India.

² School of Advanced Studies in Industrial Pollution Control Engineering, Jadavpur University, Kolkata, West Bengal, India.

³ Hal and Inge Marcus School of Engineering, Saint Martin’s University, Washington, USA.

^* Presenting author.

Contact information:

Subhasis Ghosh: subhasisghosh1604@gmail.com

Tapas Das: shivaniki@comcast.net

Papita Daspapita.das@jadavpuruniversity.in

Abstract: In the current scenario, besides dyes and heavy metals, polycyclic aromatic hydrocarbons (PAHs) are appearing as one of the most concerning pollutants. PAHs are a class of uncharged, non-polar and planar hydrocarbons that contain multiple aromatic rings. The harmful effects caused by these pollutants, viz., mutagenicity, carcinogenicity, and toxicity, show adverse effects on the biosphere. Considering that problem, this research focuses on the removal of those compounds by using PVA-Silica aerogels while studying the effect of different parameters, viz., adsorbent dose, concentration of pollutants, pH of solution and temperature of the environment. The main objective of this research is to synthesize PVA-Silica aerogels and investigate their role in naphthalene removal from aqueous solution. For this study, silica was extracted from rice husk by the acid precipitation method and incorporated into the PVA network of the aerogel. The highest removal of naphthalene was observed as 94.18% at 40 ^oC temperature, pH 7, with the adsorbent dose of 2 g/L for 5 mg/L. concentration of solution. From the isotherm analysis, it was observed that the adsorption best fitted with the Freundlich isotherm model with an R² value of 0.99. From the kinetics study, it can be stated that the adsorption process follows the Pseudo-2^nd-order kinetic model with an R² value of 0.99. From the thermodynamic analysis, it was found that the adsorption process is spontaneous and endothermic in nature.