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Deokar, Sunil K.
- Behaviour of Biomass Multicomponent Ashes as Adsorbents
Abstract Views :241 |
PDF Views:95
Authors
Affiliations
1 Department of Chemical Engineering, VNIT, Nagpur 440 010, IN
2 CSIR-National Chemical Laboratory, Pune 411 008, IN
1 Department of Chemical Engineering, VNIT, Nagpur 440 010, IN
2 CSIR-National Chemical Laboratory, Pune 411 008, IN
Source
Current Science, Vol 110, No 2 (2016), Pagination: 180-186Abstract
Physico-chemical characteristics of rice husk ash and baggase fly ash, commonly referred to as biomass ashes (BMA), enable their use as adsorbents. Contrary to normal expectations, it is observed that larger particles have more number, narrower and deeper pores than smaller particles. As a consequence they have higher pore volume, total surface area and hence adsorption capacity. Also, the uptake rate of adsorption depends on the silica to carbon ratio, which is seen to be smaller for larger particles and hence they take a longer time to reach equilibrium. The extent of carbon content determines the capacity, whereas silica to carbon ratio determines the kinetics of adsorption. Removal of 2,4-dichlorophenoxy acetic acid, from aqueous solution was chosen as a representative case for study and the results obtained are compared with earlier reported results.Keywords
Adsorption Capacity, Bagasse, Biomass Ash, Rice Husk, Silica to Carbon Ratio.Full Text
References
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- Use of Biomass Ashes in Agriculture with Reference to Farming Practices in Vidarbha, Maharashtra, India
Abstract Views :220 |
PDF Views:67
Authors
Affiliations
1 Department of Chemical Engineering, Visvesvaraya National Institute of Technology, Nagpur 440 010, IN
1 Department of Chemical Engineering, Visvesvaraya National Institute of Technology, Nagpur 440 010, IN
Source
Current Science, Vol 113, No 07 (2017), Pagination: 1384-1393Abstract
As a regular farming practice in India, especially in Vidarbha, biomass ashes (BMAs) are spread on farmland. BMA forms a protective layer on the soil surface and acts as a barrier, thereby preventing direct contact between pesticides and soil. BMA acts: (i) as an adsorbent for removal of pesticides; (ii) as a soil additive and water enhancer, and (iii) as a micronutrient source for plants. In this study, paraquat, a representative chemical was selected to prove the hypothesis that BMAs are the most efficient adsorbents of herbicides used in Vidarbha. The adsorption capacity (mg/m2) of BFA for removal of paraquat was found to be greater than that reported for natural adsorbents. Based on adsorption capacity, RHA and BFA dosages per hectare of land are recommended for different crops and fruits.Keywords
Adsorption, Bagasse Fly Ash, Biomass Ash, Paraquat, Rice Husk Ash.Full Text
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