8 research outputs found
<b>Socio-ecological and economical impact of fly ash in soil reclamation</b>
137-151
Application of fly ash for reclamation of soil is of much significance from the
consideration of its disposal and gainful utilization. Based on intrinsic
pozzolanic property and distinctive physico-chemical characteristics of fly
ash/pond ash, lot of efforts has been made on this aspect globally. The
characteristics of the ashes of significance include low bulk density, high
water holding capacity and porosity, rich in silt-sized particles, alkaline
nature, negligible solubility, reasonable plant nutrients. The studies made and
conclusions drawn in mostly suffer from the variations of ash characteristics,
soil types, and agro-climatic conditions. Finding out the relationship of the
effects of ash between different plant species and soil types is difficult. The
literature suggests huge potential for the bulk use of ashes alone and in
combination with inorganic and organic amendments to improve cultivable,
degraded/waste land, mine soil, landfills, and also to reclaim abandoned ash
ponds through biological means. The toxicity concern generally is not of much
concern owing to the ashes being generally alkaline, having elements of
concerns in oxide form, and their concentration well below the limits
prescribed for soil application of wastes. It may be of concern in respect of
arsenic in the overseas ashes having higher range of arsenic than the
prescribed limit. In Indian context, it is of least concern, particularly in
view of overall minimum content of all the elements of concerns among the
global ashes. Nevertheless, in case of any toxicity, there is plenty of scope
for combating the problem through combination treatments particularly with
organic materials and phytoremediation. The studies made in India using ash
alone and in combination with other amendments on lab scale, pot experiment,
research farm, and field scale, are in general promising. In particular,
findings of demonstration trials including long-term field trials carried out
at Central Institute of Mining & Fuel Research (Digwadih Campus) (erstwhile
Central Fuel Research Institute), Dhanbad using the ashes alone and in
combination with inorganic/organic amendments on cultivation of different
pulses, cereals, oil yielding, and vegetable crops and growing various plant
species in cultivable and problematic soils are encouraging in an eco-friendly
manner, and being adopted by the farmers. The best ash application doses being
up to 100 t/ha for cultivable land and up to/and or beyond 200 t/ha for
waste/degraded land and mine refuse depending on their characteristics.
Combination treatments including bio-solids are better as compared with ash
alone application. Such applications of fly ash with corresponding beneficial
impact on agriculture and forestry could solve the disposal problem of gigantic
ash generation in an eco-friendly manner and improve the socio-economic
condition of the farmers. This, above and beyond, continuous study in parallel
for longer duration, needs to be accelerated by the Government of India with
renewed interest through different extension programmes involving the State
Governments, farmers, and ash generating organizations to achieve maximum
utilization.
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Abstracts of National Conference on Research and Developments in Material Processing, Modelling and Characterization 2020
This book presents the abstracts of the papers presented to the Online National Conference on Research and Developments in Material Processing, Modelling and Characterization 2020 (RDMPMC-2020) held on 26th and 27th August 2020 organized by the Department of Metallurgical and Materials Science in Association with the Department of Production and Industrial Engineering, National Institute of Technology Jamshedpur, Jharkhand, India.
Conference Title: National Conference on Research and Developments in Material Processing, Modelling and Characterization 2020Conference Acronym: RDMPMC-2020Conference Date: 26–27 August 2020Conference Location: Online (Virtual Mode)Conference Organizer: Department of Metallurgical and Materials Engineering, National Institute of Technology JamshedpurCo-organizer: Department of Production and Industrial Engineering, National Institute of Technology Jamshedpur, Jharkhand, IndiaConference Sponsor: TEQIP-