Water Quality Evaluation of Post-Tin Mining Ponds Tourism in Bangka Island Using Diatom as Bioindicator

Rosa Liliani,Catur Retnaningdyah,Endang Arisoesilaningsih

doi:10.21776/ub.jitode.2019.07.01.06

Rosa Liliani, Catur Retnaningdyah + Show 1 more

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https://doi.org/10.21776/ub.jitode.2019.07.01.06

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Abstract

Post tin mining pond in Bangka Island has been used as a tourism place, fishing, fish ponds, and agricultural areas that can reduce water. The purpose of this study is to evaluate quality of water post tin mining pond which is used as a tourist place based on physics, chemical and biotic indices of Diatoms as bioindicator . Sample water and Diatoms were take at 3 post tin mining pond (Itam, Pedindang, and Jangkang 2) and natural swamp (Rawa) as reference site . Sampling e ach pond and swamp was done in three stations as replications and then be observed physic s -chemical quality of water (pH, water temperature, turbidity, conductivity, COD, and phosphate) and also the Trophic Diatom Index (TDI) and Pollution Tolerant Value (% PTV) from Diatom as indicator of trophic status and organic pollution. The results of the study showed that all of the ponds and natural swamp had low pH range from 4.32-6.34. Turbidity of Itam and Pedindang higher (22-24 NTU) than Jangkang 2 and swamp (3.13-9.13 NTU). Jangkang 2 had the highest conductivity value (115,10 μS . cm -1 ) and swamp the lowest (10.64 μS . cm -1 ). The value of COD and total phosphate in all location still fullfilled government standard (COD < 20 mg . L -1 and total phosphate < 0.2 mg . L -1 ). Water quality in ti n mining pond s lower than natural swamps based on Diatom as bioindicator. All of the ponds were categorized as moderately polluted based on Shannon Wiener Diversity index of Diatom (H=1.2-1.6), however swamp have lightly polluted (H=2.6). Trophic status of water in post ti n mining pond s based on Trophic Diatom Index (TDI) included in the eutrophic while in swamp categorized as mesoeutrophic. Based on percentage pollution tolerant value (%PTV), the water in Itam and Pedindang included in heavily organic pollution and water in Jangkang 2 and also swamp have moderately organic pollution. Keywords: Bangka, Diatom , post tin mining pond , tourism, water quality .

Highlights

RESULTAND DISCUSSION Water Quality of Post-Tin Mining Pond at Bangka Island Based on Physical-Chemical Parameters
Post tin mining pond in Bangka Island has been used as a tourism place, fishing, fish ponds, and agricultural areas that can reduce water
The purpose of this study is to evaluate the quality of water in the post-tin mining pond which is used as a tourist place based on physics, chemical and biotic indices of Diatoms as bioindicator

Summary

RESULT

AND DISCUSSION Water Quality of Post-Tin Mining Pond at Bangka Island Based on Physical-Chemical Parameters. The results of temperature measurements in the water of post-tin mining pond in Bangka Island show that the water temperature ranges from 29.8 – 32.6°C (Table 1). The high value of turbidity in Itam can be caused by heavy metals inside the post-tin mining pond and inorganic or organic material suspended or dissolved in water [17]. COD value (oxygen content needed to degrade chemically organic matter) of water in post-tin mining pond of Bangka Island ranges from 9.13 – 18.23 mg.L-1. The result of measurements, it show that the total phosphate value post-tin mining pond in Bangka Island ranges from < 0.03 –0.09 mg.L-1.

Location pH

Findings

CONCLUSION