Record Details

Recycling hazardous jarosite waste using coal combustion residues

DSpace at IIT Bombay

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Field Value
 
Title Recycling hazardous jarosite waste using coal combustion residues
 
Creator ASOKAN, P
SAXENA, M
ASOLEKAR, SR
 
Subject fly-ash
bricks
zinc
disposal
immobilization
behavior
product
clay
jarosite waste
coal combustion residues
immobilization
composites
characterization
waste recycling
 
Description Increase in environmental concern due to improper management of both hazardous and non hazardous wastes released from different industrial process prioritized the necessity for the innovation research. In this context, this paper deals with the immobilization of jarosite waste released from the zinc industry and converting it into a value added product using coal combustion residues (CCRs) through solidification/stabilization (s/s) and sintering process. Experiments were conducted using different ratio of jarosite waste and clay soil with varying concentration of CCRs. The optimized experimental results (using jarosite waste and clay soil ratio of one with 15% CCRs) showed that it is possible to make a composite having desirable mechanical properties such as compressive strength (50-81 kg/cm(2)); water absorption (13-17%); shrinkage (11-32%); and density (1.6-1.8 gm cm(-3)) to use as a construction material. Under solid state sintering process, with the application of CCRs, the mineral phases such as x Fe(3) (SO(4))(2)(OH)(6) [where X=K and NH(4)], 2Fe(2)O(3)SO(3)center dot 5H(2)O, PbSO(4), CaSO(4) in jarosite waste were transformed into a silicate matrices. The leachate studies confirmed that the toxic elements such as Cd, Pb, etc. were immobilized in the jarosite waste composite and meeting the USEPA TCLP toxicity norms for safe utility. The composite product thus developed has showed potential for recycling jarosite waste in construction sector leading to cross sector waste recycling.
 
Publisher ELSEVIER SCIENCE INC
 
Date 2011-07-27T11:00:41Z
2011-12-26T12:56:53Z
2011-12-27T05:46:22Z
2011-07-27T11:00:41Z
2011-12-26T12:56:53Z
2011-12-27T05:46:22Z
2010
 
Type Article
 
Identifier MATERIALS CHARACTERIZATION, 61(12), 1342-1355
1044-5803
http://dx.doi.org/10.1016/j.matchar.2010.09.005
http://dspace.library.iitb.ac.in/xmlui/handle/10054/7207
http://hdl.handle.net/10054/7207
 
Language en