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diatomite
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Simulation of biofilter used for removal of air contaminants (ethanol)
, Article International Journal of Environmental Science and Technology ; Volume 2, Issue 1 , 2005 , Pages 69-82 ; 17351472 (ISSN) ; Safekordi, A ; Farjadfard, S ; Sharif University of Technology
CEERS
2005
Abstract
Mathematic modeling and simulation of a biofilter system was developed for biofilters filled by three different packing materials such as granular activated carbon (GAC), compost mixed with diatomaceous earth (DE), and compost, respectively, and the effects of biofilter length, packing material, biological activity and the operation time of system on the removal of ethanol (influent contaminant) were studied. The mathematical model for analysis of mass transport phenomena in the biofilter was solved using a two-step, explicit finite difference approximation technique and computer simulation was carried out. The obtained results show that at the early stage of biofiltration the dominant...
Heavy metal removal from water and wastewater using raw and modified diatomite
, Article International Journal of Engineering, Transactions B: Applications ; Volume 20, Issue 2 , 2007 , Pages 141-146 ; 1728-144X (ISSN) ; Nahid, P ; Sharif University of Technology
Materials and Energy Research Center
2007
Abstract
Heavy metal removal from water and wastewater was investigated by using raw and modified diatomite from Iranian mines. Modification of diatomite was done by impregnating the diatomite surface with 0.35 g of manganese oxide in one gram of diatomite. This modified diatomite was named Mn-Diatomite. The surface area measurements for Mn-diatomite showed a 2.2 fold increase, hence higher removal capacity for the heavy metals. The results of the removal showed an increase in adsorption capacity which was for Pb2+ about 40 mg/g, for Ni 2+ about 34mg/g and for Cu2+ about 33mg/g. The filtration quality of diatomite was significantly enhanced with surface modification by manganese oxide