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Comparative Evaluation of Activated Carbon with Bagasse Pith for Decolourisation of Textile Dye

Abstract

In this paper comparative study of adsorption of textile dye forosol blue onto Bagasse Pith and PAC has been presented. It is found that the adsorption potential varies as a function of contact time, concentration, pH, and adsorbent doses. First of all optimum working pH was found out followed by contact time. Blank was run simultaneously, without any adsorbent to determine the impact of pH change on the dye solution. Kinetic studies were conducted by shaking 50mg of adsorbent in 100ml dye solution at the noted optimum pH. Contact time was slowly increased till maximum colour removal was observed. Isotherm studies were conducted – by shaking varied quantity of adsorbent at optimum pH for the period of 1hr and by shaking 100mg of adsorbent in 100ml of varied concentrations of dye at optimum pH for the period of 1hr. Blank study was carried out simultaneously at similar conditions with only adsorbent in 100ml of distilled water, to account for any colour leaching by the adsorbent. Studies in above mentioned cases were repeated twice and mean values are presented in graphical form. By using 900mg/lt of processed Baggase Pith, 94.17% colour removal was achieved upto 10ppm dye solution, within 60 min at the pH 2 which was further achieved by only 100 mg/lt of PAC under similar conditions. Batch kinetics and isotherm studies were undertaken, and the data evaluated for compliance with the Freundlich isotherm model supporting multi layer adsorption.

This paper was presented in Internation Congress on Environmental Research, Dec. 2008, BITS Pillani, Goa Campus, India.

The full paper can be made available on request.

HEALTH EFFECT, PREPAREDNESS & MITIGATION OF EXPOSURE TO AMMONIA FROM DOMESTIC AND INDUSTRIAL SOURCE

Abstract

In this paper exposure route, pathway in body, excretion route, its health effect and its health effect and some preparedness & mitigation of ammonia were tried to compile. It is found that source of exposure of ammonia are industrial, domestic and agriculture. Domestic level of exposure is below the limit, so the major sources of exposure are industrial and agriculture. The smell of ammonia is very irritating and specific so any leak can be easily detected and mitigatory action can be taken immediately.
This paper was presented in National Symposium on Awareness, Preparedness & Mitigation of Exposure to Domestic and Industrial Chemicals, APMEDIC-2007, Organised by National Disaster Management Authority, Gov. of India & AIIMS, New Delhi – 30th - 31st Aug. 2007 at AIIMS, New Delhi. The full paper can supplied on request.

Economical Method of Wastewater Treatment of Textile Industry for Recycling

Abstract

In present study maize cob was used as adsorbent for colour removal from homogeneous system of textile dye and textile effluent as heterogeneous system. Adsorption kinetics were studied using the parameters such as dye concentration, adsorbent dose, agitation time and pH. Adsorption followed first order expression. The equilibrium adsorption data followed Freundlich isotherm. Maize Cob was found efficient in both homogeneous as well as heterogeneous system. Adsorption was nearly quantitative at pH 2.0. Around 99.36 % colour was removed from 10 ppm dye solution by using 600 mg/lt of maize cob at pH 2.0. The findings of elemental studies by XRF- scan and SEM studies were correlated with the colour removal capacity of maize cob.
In heterogeneous system also acidic pH was found more effective in colour removal. The BOD, oil & grease and TSS were found below detectable limit, while COD and TDS were found 24.3 mg/lt and 152 mg/lt respectively at 150 mg/lt dose of maize cob.

This paper was presented in National Conference of Environment Conservation – 1st – 3rd Sep. 2006 at BIT – Pillani, Rajasthan, India. Full paper can be made available on request.

Recycling of Red Mud for Textile Wastewater Treatment

Abstract

Waste red mud, an industrial byproduct, generated during the processing of bauxite ore, is recycled for the adsorption of forosol blue, a textile dye from the aqueous solution and textile wastewater treatment. Adsorption kinetics were studied using the parameters such as dye concentration, adsorbent dose, agitation time and pH. Adsorption followed first order expression. Red mud was found efficient in both homogeneous as well as heterogeneous system. Adsorption was nearly quantitative at pH 2.0. Effect of pH and adsorption studies suggests that the mechanism of adsorption is mostly ion exchange.

This paper was presented in International Conference of chemistry and Environment – Dec 2005. The full paper can be made available on request.