Indian Science Technology and Engineering facilities Map
Supplier Map
Service Map


Publication Details

Indian Institute of Technology (IIT) Patna 
Tiwari, M., Mandal K. K., and Raychoudhury, T.  
Corresponding Authors:
Raychoudhury, T 
DOI #: 
Evaluation of injection schedule for synthesizing iron-sulfide within the porous media for immobilizing arsenite: In-situ remediation approach for arsenic in groundwater 
Groundwater for Sustainable Development 
Arsenic Ferrous sulfide, Fate and transport In-situ remediation Natural sediment 
The main objectives of the study are, (i) to assess the possibility of synthesizing ferrous sulfide (FeS) in-situ within the natural sand packed porous media, (ii) to evaluate the extent of arsenite [As(III)] immobilization in the FeS containing natural porous media, and (iii) to evaluate the fate of iron (Fe) during immobilization of As (III) and its implication on the porosity. Several column experiments are performed, where ferrous sulfate (FeSO4) and sodium sulfide (Na2S) solution are injected alternatively in the porous media for synthesis of FeS with/without porous media being pre-saturated with As(III). Then As(III) solution is injected from one end. The results indicate that FeS can be effectively synthesized throughout the column. The immobilization of As(III) is also very high (>80% up to 17 PVs) in those cases. With As(III) pre-saturated condition, the injection of 20 mM reagents for 1.5 PVs shows the optimal result for immobilization of As(III) (>72% retained up to 35 PVs). In this case, though the relatively high amount of Fe has mobilized along with As(III) at the initial stage, however towards the later stage, no Fe is detected at the outlet, and almost 60% of injected Fe is retained within the porous media. 
Entered by:
Venkata Dantham on 2020-08-03 
I-Mitra(आई-मित्र) Welcomes You..
It has always been the basic tenet of the Government of India, in generously funding R&D efforts at academic institutions over the years, that facilities established through such support be made available to those needing them and qualified to make use of them for their own research work

However, this was never easy or straightforward for, among other reasons, there was no ready source of information of what facility was available and where. Thanks to the Web, it is much easier today to have a national and regional “inventory of resources”, so as to match users with the resources they need, and to do all this in an efficient and transparent manner.

This can lead to a leap in R&D productivity and greatly enhance the effectiveness of public investment. This is the motivation behind I-STEM.
read less <<
Visitor Hit Counter
Hosted at Indian Institute of Science
Copyright © 2020 I-STEM. All rights reserved.
Audited by: STQC Bengaluru.