| Acidic Mine drainage Analysis based on Bioassay |
| 생태독성법을 이용한 산성배수 평가 |
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전태성1, 연익준1, 박종호2, 최현일3 |
1충주대학교
2충청북도내수면연구소
3포스코건설㈜ |
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| Abstract |
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Acidic shale mine drainage (ASMD) contains high content of mineral ions such as Al, Fe, and Mg, while
its turbidity is low (0.4-0.6 NTU). Yellowish brown precipitation of iron hydroxide in valley deteriorates the
natural views. ASMD results in changes in aquatic environments and the reduction of diversity and population
size of aquatic ecosystem. Also, white colored precipitation at the point of ASMD injection to main stream
might be originated by aluminium ion in ASMD. This causes physicochemical and social problem to users of
this stream as drinking water source and irrigation water. Thus, ASMD in valley has to be neutralized and
treated for the removal of mineral ions, before discharging to main water stream. The purpose of this research
focused on evaluating various bioassay. Carassius auratus and Pungtungia herzi were exposed to mercury
(HgCl₂), lead (PbCl₂) and copper (CuSO₄) during larval stage, more sensitive than other life stages to determine
acute toxicity. The experiments were repeated three times and the LC50 (24, 48, 72 and 96 hour) was
determined for two species. Data obtained from the acute toxicity tests were evaluated using the probit analysis
statistical method. C. auratus was found to be more susceptible than P. herzi to lead, while P. herzi was found
to be more sensitive than C. auratus for mercury and copper. The sensitivity of three metals tested is likely
ranked in the following order from highest to lowest toxicity on larval stage of these fish: mercury > copper
> lead. It is suggested that acute toxic test at the larval stage of C. auratus and P. herzi which are indigenous
species in Asia area is an important part of the ecotoxicological assessment of some heavy metals. |
| Key Words:
ASMD, Carassius auratus, Pungtungia herzi, mercury, lead, copper, acute toxicity tests |
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