Ardiani, Oky (2008) Studi Penurunan Logam Berat Timbal (Pb2+) Dan Seng (Zn2+) Dengan Penambahan Ca(Oh)2 [Kalsium Hidroksida] Dan Cac03 [Kalsium Karbonat] Pada Limbah Aki Bekas. Other thesis, Institut Teknologi Sepuluh Nopember Surabaya.
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Abstract
Salah satu sumber pencemaran timbal dan seng berasal dari pabrik aki yang ada di Kota Surabaya dengan konsentrasi Pb sebesar 87,94 mg/L dan Zn sebesar 63,06 mg/L. Pb dan Zn merupakan logam berat yang termasuk dalam golongan 83 (Bahan Berbahaya dan Beracun) jika kadar yang ada di perairan melebihi nilai ambang batas. Penelitian ini bertujuan untuk menganalisis pengurangan kadar logam timbal dan seng dengan penambahan larutan Ca(Oflh, dan CaC03• Proses awal yang dilakukan adalah proses variasi penambahan larutan basa Ca(OH)z dan CaC03 pada sampel dengan variasi pH untuk Ca(OH)z 9; 9,5; 10 ; 10,5 dan 11 dan variasi dosis untuk CaC03 adalah 1 giL; 2 giL; 3g/L; 4 giL dan 5g/L. Kemudian dilanjutkan dengan proses pengadukan cepat dengan variasi kecepatan 100 rpm dan 120 rpm selama 2 menit dan proses pengadukan lambat dengan kecepatan 30 rpm selama I 0 menit. Selanjutnya dianalisis dengan AAS untuk mengetahui kandungan Pb dan Zn terlarut. Analisis COD dilakukan untuk mengetahui peran COD dalam pengendapan. Hasil yang didapat adalah ~gendapan Ca(OH)z terjadi pada pH 10,5 dengan efisiensi penyisihan Pb + 99,50o/o, dan Zn2 + dengan pH 10,5 sebesar 99,99%. Pengendapan CaC03 terjadi pada dosis 2 giL dengan efisiensi penyisihan Pb2+ 24,31% dan efisiensi penyisihan Zn2 + pada dosis 4 giL sebesar 28,12%. Penyisihan terbesar terjadi pada kecepatan 120 RPM Pada proses pengendapan hidroksida, penyisihan zat orpnik yang ditunjukkan dari nilai maksimum COD sebesar 52,94% dapat mempertinggi persentase penyisihan logam berat. Namun pada proses pengendapan karbonat, penyisihan zat organik tidak dapat terjadi
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One source of lead and zinc pollution comes from battery factories in the city of Surabaya with a Pb concentration of 87.94 mg/L and Zn of 63.06 mg/L. Pb and Zn are heavy metals which are included in group 83 (Hazardous and Toxic Substances) if the levels in the water exceed the threshold value. This research aims to analyze the reduction of lead and zinc metal levels by adding Ca(Oflh, and CaC03 solutions). The initial process carried out is the process of varying the addition of Ca(OH)z and CaC03 base solutions to samples with varying pH for Ca(OH)z 9 ; 9.5; 10 ; 10.5 and 11 and the dosage variations for CaC03 are 1 giL; 2 giL; 3g/L; 4 giL and 5g/L. Then proceed with the fast stirring process with speed variations of 100 rpm and 120 rpm for 2 minutes and a slow stirring process with a speed of 30 rpm for I 0 minutes. Next, it was analyzed with AAS to determine the dissolved Pb and Zn content. COD analysis was carried out to determine the role of COD in deposition. The results obtained were ~Ca(OH)z deposition occurred in pH 10.5 with a Pb + removal efficiency of 99.50o/o, and Zn2 + with a pH of 10.5 of 99.99%. CaC03 deposition occurred at a dose of 2 giL with a Pb2+ removal efficiency of 24.31% and Zn2 + removal efficiency at dose of 4 giL was 28.12%. The greatest removal occurred at a speed of 120 RPM. In the hydroxide deposition process, the removal of orpnic substances as indicated by the maximum COD value of 52.94% could increase the percentage of heavy metal removal. However, in the carbonate deposition process, the removal of organic substances cannot occur
| Item Type: | Thesis (Other) |
|---|---|
| Additional Information: | RSL 628.357 Ard s-1 2008 |
| Uncontrolled Keywords: | Pb, Zn, Presipitasi, Ca(OH)2 dan CaC03; Pb, Zn, Precipitation, Ca(OH)2 and CaC01 |
| Subjects: | T Technology > TD Environmental technology. Sanitary engineering > TD420 Water pollution T Technology > TD Environmental technology. Sanitary engineering > TD767.7 Sewage sludge treatment and disposal T Technology > TD Environmental technology. Sanitary engineering > TD899 Waste control in special industries, plants, processes, etc |
| Divisions: | Faculty of Civil Engineering and Planning > Environment Engineering > 25201-(S1) Undergraduate Thesis |
| Depositing User: | EKO BUDI RAHARJO |
| Date Deposited: | 01 Mar 2024 08:43 |
| Last Modified: | 01 Mar 2024 08:43 |
| URI: | http://repository.its.ac.id/id/eprint/107755 |
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