-, Francisco (2014) Penyisihan Krom (VI) Dengan Menggunakan Dried Activated Sludge. Undergraduate thesis, Institut Teknologi Sepuluh Nopember.
Preview |
Text
3310100079-Undergraduate-Theses.pdf - Published Version Download (1MB) | Preview |
Abstract
Penggunaan dried activated sludge (DAS) menjadi salah satu
alternatif dalam penyisihan logam Cr (VI) pada air limbah. Proses
penyisihan terjadi secara pasif melalui interaksi logam Cr (VI)
dengan senyawa penyusun DAS serta tidak dipengaruhi oleh
tingkat toksisitas logam. Beberapa parameter perlu diperhatikan
dalam proses penyisihan logam Cr (VI) termasuk pH serta
konsentrasi DAS. Penelitian ini bertujuan untuk menentukan
kemampuan DAS serta pengaruh variasi konsentrasi Cr (VI)
terhadap proses penyisihan Cr (VI).
Variabel yang digunakan dalam penelitian ini yaitu variasi
konsentrasi Cr (VI) dan variasi jenis DAS. Logam Cr (VI) yang
digunakan berasal dari larutan K2Cr2O7 dengan variasi
konsentrasi sebesar 50 mg/L, 100 mg/L, dan 150 mg/L. Jenis
DAS berasal dari pengolahan limbah domestik (IPLT),
pengolahan limbah industri (SIER), dan pengolahan limbah
Rumah Pemotongan Hewan (RPH). Pengeringan dilakukan pada
suhu 60 0C dan digunakan konsentrasi DAS sebesar 10 g/L.
Penelitian ini dilakukan selama 24 jam dengan 6 kali pengukuran
logam Cr (VI) yaitu pada jam ke 0, 1, 3, 5, 12, serta 24
menggunakan spektrofotometer UV-Vis. Analisis total krom
dilakukan pada waktu ke 24 jam menggunakan spektrofotometer
AAS (Atomic Absorption Spectrophotometer) untuk mengetahui
Cr (III) yang terbentuk. pH 2 ditetapkan sebagai pH awal serta
perubahan pH dan suhu diukur setiap pengambilan sampel.
DAS hasil pengolahan limbah domestik dan industri terlihat
lebih baik dalam menyisihkan 100 mg/L Cr (VI) hingga mencapai 50% tanpa penetapan pH awal. Namun, kemampuan penyisihan
Cr (VI) pada semua variasi konsentrasi oleh ketiga jenis DAS
meningkat hingga 99% pada kondisi pH 2. Penggunaan pH
rendah dapat mempercepat proses penyisihan Cr (VI) akibat
protonasi senyawa pada DAS. Mekanisme reduksi terjadi dalam
proses penyisihan sehingga terbentuk Cr (III) dalam larutan.
Peningkatan konsentrasi Cr (VI) menyebabkan konsentrasi Cr
(VI) yang tersisihkan semakin besar pada waktu yang sama.
=================================================================
Dried activated sludge (DAS) has been used as an alternative
media to remove Cr (VI) in wastewater. The removal process was
occurred through passive uptake by interaction with several
functional groups of DAS which was resistance with metal
toxicity. These parameters were necessary considered to remove
Cr (VI) including pH and concentration of DAS. This study aims
to investigate the prospect of DAS to remove Cr (VI) and to
determine the effect of initial concentration of Cr (VI) in removal
process.
Variables used in this study were initial concentrations of Cr
(VI) and DAS origins. Cr (VI) solutions were prepared using
K2Cr2O7 with initial concentration of 50 mg/L, 100 mg/L and 150
mg/L Cr (VI). DAS was obtained from municipal sewage
treatment plant (IPLT), industrial wastewater treatment plant
(SIER), and slaughterhouse wastewater treatment plant (RPH).
Each of DAS was dried at 60 0C and added 10 g/L of DAS for
removal process. The experiment was conducted for 24 h with 6
times samples collection at 0, 1, 3, 5, 12 and 24 hours. Samples
was analyzed spectrophotometrically for Cr (VI) concentration
and AAS (Atomic Absorption Spectrophotometer) for total
chromium to determine the existence of Cr (III). Initial pH of 2
was adjusted and the effect of pH and temperature were also
investigated.
The result showed that the removal of 100 mg/L Cr (VI) was
well performed by 50% with DAS from sewage and industrial
wastewater treatment plants, without pH adjustment. However, up to 99% of the removal efficiency was achieved in all
concentration of Cr (VI) regardless of DAS origins, at initial pH
2. The removal process was accelerated with pH 2 due to
protonation of functional groups of DAS. As higher initial
concentration of Cr (VI) resulted in higher removal efficiency.
The existence of Cr (III) was found in the solution as a result of
Cr (VI) reduction mechanism.
| Item Type: | Thesis (Undergraduate) |
|---|---|
| Additional Information: | RSL 628.357 Fra p |
| Uncontrolled Keywords: | Cr (VI), Dried activated sludge (DAS), pH |
| Subjects: | T Technology > TD Environmental technology. Sanitary engineering > TD646 Sewage--Purification |
| Divisions: | Faculty of Civil Engineering and Planning > Environment Engineering > 25201-(S1) Undergraduate Thesis |
| Depositing User: | Anis Wulandari |
| Date Deposited: | 29 Sep 2017 05:36 |
| Last Modified: | 29 Sep 2017 05:36 |
| URI: | http://repository.its.ac.id/id/eprint/48884 |
Actions (login required)
 |
View Item |