Susilowati, Wahyuni Dwi (2016) Aplikasi Teknis Stabilitsasi/Solidifikasi Untuk Remediasi Timbunan Tailin Penambangan Emas Rakyat Menggunakan Fly Ash. Undergraduate thesis, Institut Teknologi Sepuluh Nopember.
Preview |
Text
3312100082-undergraduate theses.pdf - Published Version Download (2MB) | Preview |
Preview |
Text
3312100082-paperpdf.pdf - Published Version Download (530kB) | Preview |
Preview |
Text
3312100082-presentasipdf.pdf - Presentation Download (3MB) | Preview |
Abstract
Penambangan emas rakyat di Kulon Progo menghasilkan
tailing yang mengandung merkuri. Pada penelitian terdahulu
diperoleh data kadar merkuri tailing penambangan emas Kulon
Progo sebesar 164-384 mg/kg. Di lokasi tambang emas tersebut
terdapat tempat penimbunan tailing aktif (TPTA) dan Tempat
penimbunan tidak aktif (TPTTA). TPTA adalah tempat penimbunan
untuk tailing yang dihasilkan oleh penambangan emas rakyat yang
masih aktif beroperasi. Tempat penimbunan tidak aktif (TPTTA)
adalah lokasi penimbunan tailing penambangan emas rakyat yang
sudah tidak beroperasi. Salah satu upaya remediasi timbunan tailing
adalah teknik stabilisasi/solidifikasi (S/S). Penelitian bertujuan
menentukan karakteristik tailing TPTA dan TPTTA serta menentukan
komposisi optimum S/S tailing TPTA dan TPTTA menggunakan fly
ash.
Pengambilan sampel tailing dilakukan di lima TPTA dan di
lima TPTTA, serta di satu lokasi kontrol yang tidak tercemar. Sampel
diambil pada kedalaman 30, 60, dan 90 cm pada setiap lokasi.
Karakteristik tailing yang dianalisis adalah total konsentrasi logam
berat, pH, dan kadar air. Sampel tailing yang digunakan untuk
pembuatan benda uji S/S dicampur secara homogen terlebih dahulu.
Pembuatan benda uji menggunakan cetakan berbentuk kubus
dengan panjang sisi 5 cm. Variasi rasio berat sampel dari TPTA : fly
ash adalah 100:0, 90:10, 80:20, 70:30, 60:40, 50:50, 40:60, 30:70,
20:80,10:90, 0:100. Sedangkan variasi rasio berat sampel dari
TPTTA : fly ash (%) adalah 100:0, 90:10, 80:20, 70:30, 60:40, 50:50,
40:60, 30:70, 20:80, 10:90, 0:100. Uji kuat tekan terhadap benda uji
S/S dilakukan dengan Toorse Universal Testing Machine. Uji Toxicity
Characteristic Leaching Procedure (TCLP) dilakukan terhadap benda
uji S/S dengan metode US EPA 1311.
ii
Hasil penelitian menunjukkan bahwa kadar merkuri pada
sampel TPTA sebesar 160-318 mg/kg dan pada sampel TPTTA
sebesar 94-99 mg/kg. Total konsentrasi merkuri melebihi baku mutu
PP No.101 Tahun 2014 yaitu sebesar 75 mg/kg. Nilai pH sampel
TPTA sebesar 6,58 dan nilai pH sampel TPTTA sebesar 7,3. Kadar
air pada sampel tailing sekitar 19,16-34,41%. Jenis tanah setempat
merupakan campuran lempung dan lanau, yang juga salah satu
bahan pozzolan yang baik untuk proses S/S. Hasil penelitian
menunjukkan bahwa merkuri mampu terstabilisasi dan tersolidifikasi
dengan baik. Nilai kuat tekan produk S/S TPTA dan TPTTA masingmasing
sebesar 53 ton/m2 dan 107 ton/m2. Nilai kuat tekan tersebut
memenuhi baku mutu menurut Keputusan Kepala Bappedal No.3
Tahun 1995 sebesar 10 ton/m2. Kadar merkuri dari kedua hasil uji
TCLP produk S/S TPTA dan TPTTA adalah < 0,0005 mg/L. Nilai
tersebut memenuhi baku mutu berdasarkan PP No.101 Tahun 2014,
yaitu sebesar 0,05 mg/L. ========== Artisanal gold mining generates tailing residue which
contains mercury. Results of the preliminary research showed
that the tailing residue in artisanal gold mine in Kulon Progo
contained mercury concentration of 164-384 mg/kg. There are
two kinds of tailing dump sites in the public gold mine. These
ares active tailing piling site (ATPS) and inactive tailing piling
site (ITPS). ATPS is the tailing residue piling site of the public
gold mine, which is still operated, whereas ITPS is tailing
dumpsite which is not any longer use for tailing disposal. One of
the efforts to minimize the impact of mercury in the tailing dump
is by stabilization/solidification method. This research aimed to
determine the characteristics of tailing residue in the ATPS and
ITPS. Besides, this research will determine optimum
composition of samples from the ATPS and ITPS using fly ash.
Tailing samples were collected from five ATPS’s, five
ITPS’s, and from a control location which was not contaminated
by tailing residue. The samples were taken from 30, 60, and 90
cm depths. Heavy metal concentrations, pH, and moisture
cotent of each sample were measured. Samples from each
location were mixed thoroughly prior to S/S process. The S/S
specimens were prepared using 5 cm cubic shaped mould cast.
Composition variations between ATPS and ITPS tailing samples
and fly ash were adjusted to 100:0, 90:10, 80:20, 70:30, 60:40,
50:50, 40:60, 30:70, 20:80, 10:90, and 0:100 w/w. The quality of
S/S specimens was analyzed using compressive strength and
Toxicity Characteristic Leaching Procedure (TCLP) tests.
iv
Compressive strength tes was performed usig Toorse Universal
Testing Machine, whereas the TCLP test was conducted
following US EPA 1311.
Mercury concentrations in samples from the ATDS ranged
from 160 to 318 mg/kg, whereas those from the ITDS were 94-99
mg/kg. These values exceeded the quality standards of the
Government Regulation No.101/2014 of 75 mg/kg. The pH values
of samples from ATPS and ITPS were 6.58 and 7.3 respectivey.
The moisture contents of the tailing residue varied from 19.16% to
34.41%. The soil in the study area was classified as silty clay,
which might support the binding mechanism during the S/S
process. The compressive strength values of the S/S products of
the ATDS and ITDS samples were 53 ton/m2 and 107 ton/m2
respectively. These values met the quality standards of the Head
of Environmental Impact Control Agency (BAPEDAL) No. 3/1995
of 10 ton/m2. The result of TCLP test for mercury of the S/S
products of ATDS and ITDS samples were below 0.0005 mg/L.
This value met the quality standards of Government Regulation
No.101/2014 of 0.05 mg/L.
| Item Type: | Thesis (Undergraduate) |
|---|---|
| Additional Information: | RSL 620.136 Sus p 3100016066592 |
| Uncontrolled Keywords: | fly ash, mercury, artisanal gold mining, stabilization/solidification, tailing, fly ash, merkuri, penambangan emas rakyat, stabilisasi/ solidifikasi, tailing |
| Subjects: | T Technology > TD Environmental technology. Sanitary engineering > TD427.F58 Fly ash T Technology > TD Environmental technology. Sanitary engineering > TD767.7 Sewage sludge treatment and disposal |
| Divisions: | Faculty of Civil Engineering and Planning > Environment Engineering > 25201-(S1) Undergraduate Thesis |
| Depositing User: | - Davi Wah |
| Date Deposited: | 24 Oct 2019 03:49 |
| Last Modified: | 24 Oct 2019 03:49 |
| URI: | http://repository.its.ac.id/id/eprint/71311 |
Actions (login required)
 |
View Item |