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Sharmila Ray,P.S. Khillare,김기현 한국대기환경학회 2012 Asian Journal of Atmospheric Environment (AJAE) Vol.6 No.2
To investigate the effect of aircraft traffic emissions on soil pollution, metal levels were analyzed for 8metals (Fe, Cr, Pb, Zn, Cu, Ni, Mn and Cd) from the vicinity of the Indira Gandhi International (IGI) airport in Delhi, India. The texture of the airport soil was observed to be sandy. Among the metals, Cd showed minimum concentration (2.07 μg g-1), while Fe showed maximum concentration (4379 μg g-1). The highest metal accumulation was observed at the landing site. Significant correlations were observed between metals and different textures (sand, silt, and clay) as well as with organic carbon (OC). The results indicate that grain size play a major role in OC retention in soil and subsequently helps in adsorption of metals in soil. Müller’s geoaccumulation index (I-geo)showed that airport soil was contaminated due to Cd and Pb with the pollution class 2 and 1, respectively. Pollution load index of the airport site was 1.34-3times higher than the background site. The results of factor analysis suggested that source of the soil metal is mainly from natural weathering of soil, aircraft exhaust, and automobile exhaust from near by area. With respect to Dutch target values, the airport soils showed ~3 times higher Cd concentration. The study highlighted the future risk of enhanced metal pollution with respect to Cd and Pb due to aircraft trafficking.
Dhokte, Aashish O.,Khillare, Santosh L.,Lande, Machhindra K.,Arbad, Balasaheb R. Korean Chemical Society 2011 대한화학회지 Vol.55 No.3
화력발전소에서 배출되는 석탄회를 이용하여 메조다공성 소재인 MCM-41을 제조하였다. 제조한 소재는 XRD, FTIR, SEM 및 EDS 방법으로 특성을 규명하였다. 이 소재의 촉매활성을 방향족 알데히드와 malonontrile의 Knoevenagel축합 반응에서 5-arylindene malononitriles의 합성에 대해 연구하였다. 이 방법의 특징은 쉬운 취급법, 안정성, 촉매의 재사용 및 생태친화성, 고수율, 짧은 반응시간, 간단한 실험과정 및 마무리 절차 등을 들 수 있다. Coal fly ash of thermal power plants converted into mesoporous materials MCM-41. The synthesized material was characterized by XRD, FT-IR, SEM, and EDS techniques. The catalytic activity of prepared material was studied for the synthesis of 5-arylindene malononitriles via Knoevenagel condensation of aromatic aldehydes and malonontrile is described. The features of present method are easy handling, stability, reusability, and eco-friendliness of catalyst, high yields, short reaction time, simple experimental and work up procedure.
Aashish O. Dhokte,Balasaheb R. Arbad,Santosh L. Khillare,Machhindra K. Lande 한국공업화학회 2011 Journal of Industrial and Engineering Chemistry Vol.17 No.4
The present study describes the synthesis of mesoporous silica material (MCM-41) from fly ash of thermal power plants so as to meet requirements of green chemistry approach. The synthesized material was characterized by XRD, FT-IR, SEM-EDS techniques. The prepared material, MCM-41, was utilized as catalyst for classical Mannich reaction for the synthesis of b-amino carbonyl compounds. The present methodology offers several advantages, like excellent yields, short reaction times,reusability of catalyst and simple work up procedure.