Muhammad.pdf (42.18 kB)
Download file

Adsorption of heavy metals in slow sand filters

Download (42.18 kB)
conference contribution
posted on 12.02.2018, 15:08 authored by Nur Muhammad, Jeremy Parr, Michael D. Smith, Andrew D. Wheatley
Chemical contaminants at low concentrations are difficult to remove from water. Chemical precipitation, reverse osmosis and other methods become inefficient when contaminants are present in trace concentrations. The process of adsorption is one of the few alternatives available for such situations (Huang and Morehart, 1991). A number of adsorbent materials have been studied for their capacity to remove heavy metals, including activated carbon, activated alumina, ion exchange resins, crushed coals etc. Some of these materials, such as ion exchange resins are totally effective but expensive and others, such as coal and straw, are inexpensive but ineffective. Activated carbon is very effective in removing heavy metals, but is readily soluble under extreme pH conditions (Huang and Blankenship, 1989). Peat moss has been found as very effective in adsorbing heavy metals (Ho, 1995). In the present study Slow Sand Filters (SSFs) are tried to remove heavy metals and found very effective (Muhammad et al, 1997). Experimental results on the influences of process variables in removing heavy metals by SSFs demonstrated that adsorption was one of the mechanisms of the removal of heavy metals (Muhammad et al, 1997). To confirm this prediction/hypothesis, batch adsorption tests were carried out. This paper deals with the results of the batch adsorption tests to establish adsorption isotherms and adsorption capacity of the sand for the selected heavy metals.

History

School

  • Architecture, Building and Civil Engineering

Research Unit

  • Water, Engineering and Development Centre (WEDC)

Published in

WEDC Conference

Citation

MUHAMMAD, N. ... et al, 1998. Adsorption of heavy metals in slow sand filters. IN: Pickford, J. (ed). Sanitation and water for all: Proceedings of the 24th WEDC International Conference, Islamabad, Pakistan, 31 August-4 September 1998, pp.346-349.

Publisher

© WEDC, Loughborough University

Version

VoR (Version of Record)

Publisher statement

This work is made available according to the conditions of the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International (CC BY-NC-ND 4.0) licence. Full details of this licence are available at: https://creativecommons.org/licenses/by-nc-nd/4.0/

Publication date

1998

Notes

This is a conference paper.

Other identifier

WEDC_ID:11677

Language

en

Usage metrics

Categories

Keywords

Exports