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Anoxic limestone drain for treatment of highly acidic water


Mohd Kusin, Faradiella and Aris, Azmi (2013) Anoxic limestone drain for treatment of highly acidic water. In: International Conference on Environmental Forensics 2013, 11-14 Nov. 2013, Marriot Hotel, Putrajaya, Malaysia. (pp. 369-373).


Limestone has been widely used in the treatment of acidic water due to its capability of neutralizing acid and removing metals in water. This study investigated the efficiency of limestone treatment in treating acidic water in anoxic limestone drain at a laboratory scale. The anoxic limestone drain was basically designed to enhance limestone dissolution and alkalinity generation thus minimizing the potential of armouring, which may decrease the rate of acid neutralization. Actual raw water samples from two different locations within Sg. Bekok catchment which were highly acidic with low pH values were used in the experiment treated by 30 mm diameter of 112 kg of limestone. The conditions under which the pH increases, acidity decreases, alkalinity produced and metals were removed in the anoxic limestone drain have been determined. pH was significantly increased from initially 3.27–4.09 to 6.49–6.67 after flowing through the anoxic drain in 10 min of contact with the limestone. Acidity was reduced from 73–99 mg/L as CaCO3 to 17–19 mg/L as CaCO3 as pH were raised to reach near neutral levels. Iron and aluminium were also being removed in the anoxic limestone drain.

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Additional Metadata

Item Type: Conference or Workshop Item (Paper)
Divisions: Faculty of Environmental Studies
DOI Number: https://doi.org/10.1007/978-981-4560-70-2_67
Publisher: Springer
Keywords: pH rise; Acidic water; Anoxic limestone drain
Depositing User: Nabilah Mustapa
Date Deposited: 07 Jun 2017 08:53
Last Modified: 07 Jun 2017 08:53
Altmetrics: http://www.altmetric.com/details.php?domain=psasir.upm.edu.my&doi=10.1007/978-981-4560-70-2_67
URI: http://psasir.upm.edu.my/id/eprint/55769
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