Acid buffering characteristics of acid mine drainage

Ooi, Mei Hong (2010) Acid buffering characteristics of acid mine drainage. Universiti Malaysia Sabah. (Unpublished)


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Acid mine drainage (AMO) samples, AMD S1 and AMD 52, from Mamut Copper Mine (MCM), Ranau, Sabah were Investigated for its add buffering characteristics by potentiometric titration with NaOH. The AMD has the following characteristics: pH~2.56, total acid= 343-365 mg CaCO3/L, dissolved Fe= 2.4-2.5 mg/L, Mn= 11.3- 11.9 mg/L, Cu= 4.4-4.5 mg/L, Zn= 2.6-2.7 mg/L, AI= 3.1 mg/L For comparison, acidified distilled water as well as Fe(III) and Al(III) solutions were also tested. The results showed that addifled distilled water exhibited a gradual Increase in pH with Increasing amount of base added. Comparatively, Fe(m) and AI(m) solutions required higher amount of base to attain pH 7.0, and this increased with the concentration of Fe(m) and AI(m). In the case of AMD, a much higher amount of base was required to raise Its pH to 7.0. This can be attributed to the strong buffering at pH 3.5-5.0, which was more apparent than those exhibited by the Fe(III) and Al(Ill) solutions.

Item Type: Academic Exercise
Uncontrolled Keywords: Mamut Copper Mine(MCM), potentiometric titration , NaOH
Subjects: T Technology > TP Chemical technology
Divisions: SCHOOL > School of Science and Technology
Depositing User: Unnamed user with email
Date Deposited: 28 Jun 2016 04:15
Last Modified: 01 Nov 2017 07:12

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