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Kelompok 15
Muhammad Raja Yustisia Yudhiputra (082001900047)
Salsabila Syifa Nadiyah Khairunnisa (082001900061)
Dosen Pengampu
Dr. Ir. Diana Irvindiaty Hendrawan, Msi
Pramiati Purwaningrum, S.T,M.T
Asisten Labolatorium
Sharfina Nadhilah
JURUSAN TEKNIK LINGKUNGAN
FAKULTAS ARSITEKTUR LANSKAP DAN TEKNOLOGI LINGKUNGAN
UNIVERSITAS TRISAKTI
JAKARTA
2020
Cara Kerja Sampling
Tuang air sampel yang diambil kedalam jerigen sampai penuh dan tutup
agar tidak ada udara pada air sampel
Bilas jerigen dengan air sampel
Ambil air sampel ½ - 2/3 dari kedalaman sungai
Ukur kedalaman sungai dengan media botol sampling
Bilas botol sampler dan jerigen dengan aquades
Cara Kerja Isoterm Adsorpsi
Tuang larutan sampel ke dalam kuvet dan ukur serapan larutan sampel
menggunakan spektrofotometer dengan panjang gelombang 610 nm.
Setelah 30 menit, lakukan penyaringan masing-masing larutan sampel
dan juga pembilasan kuvet dengan air suling
Melakukan jartest dengan kecepatan 200 rpm selama 30 menit dan
menyiapkan kertas saring untuk proses penyaringan
Tambahkan karbon aktif berturut 0; 0,1; 0,3; 0,5; 0,7; 0,9 gram ke
masing-masing gelas piala.
Isi 300 mL air sampel B lab ke dalam masing-masing gelas piala
Perhitungan
Diketahui:
Tabel Standar
Konsentrasi Absorban
0 0
2 0,012
6 0,018
10 0,04
20 0,083
30 0,116
Data Diketahui
a (intersep) 0,001366707
b (slope) 0,003892534
r2 (regresi) 0,9964
y = a + bX y = 0,00137 + 0,0039X
Sampel Tabel Data Pengamatan
Sampel Massa Karbon
(gr)
ABS
1 0 0,1
2 0,1 0,98
3 0,3 0,93
4 0,5 0,93
5 0,7 0,89
6 0,9 0,93
Ditanya:
1. Awal (konsentrasi sebelum dimasukkan karbon)
2. Akhir (konsentrasi setelah dimasukkan karbon)
3. Selisih
4. X (jumlah zat yang teradsorbsi)
5. x/m (kapasitas adsorbsi karbon
6. Log x/m
7. Log C (konsentrasi zat terlarut setelah mencapai kesetimbangan
Tabel 1 . Tabel Standar
Tabel 2 . Data Dikeahui
Tabel 3 . Sampel Data Pengamatan
Perhitungan
1. Awal =
𝐴𝑏𝑠𝑜𝑟𝑏𝑎𝑛 −𝐼𝑛𝑡𝑒𝑟𝑠𝑒𝑝
𝑆𝑙𝑜𝑝𝑒
=
0,1 −(0,003667075)
0,003892534
= 𝟐𝟓, 𝟑𝟑𝟗𝟎𝟗𝟖𝟏𝟕
2. Akhir =
𝐴𝑏𝑠 𝑚 𝑘𝑎𝑟𝑏𝑜𝑛 −𝐼𝑛𝑡𝑒𝑟𝑠𝑒𝑝 𝑚 𝑘𝑎𝑟𝑏𝑜𝑛
𝑆𝑙𝑜𝑝𝑒 𝑚 𝑘𝑎𝑟𝑏𝑜𝑛
=
0,098 −(0,003667075)
0,003892534
= 𝟐𝟒, 𝟖𝟐𝟓
3. Selisih = (konsentrasi awal) – (konsentrasi akhir)
= (25,33909817) – (24,82529401) = 0,513804163
4. X = Selisih . sampel (mL) = 0,513804163 . 300 mL = 154, 1412
5. x/m =
𝑥
𝑚
=
154,1412
0,1
= 𝟏𝟓𝟒𝟏, 𝟒𝟏𝟐𝟒𝟗
6. Log x/m = log (x/m) = log (1541,41249) = 3,287918874
7. Log (c) = log (selisih) = log (513804163) = - 0,254865663
Perhitungan
no intersep (a) slope (b) m (gr) ABS Awal Akhir selisih x x/m Log x/m log c
1 0,001366707 0,003892534 0 0,1 25,33909817 25,33909817 0 0 0 0 0
2 0,001366707 0,003892534 0,1 0,098 25,33909817 24,82529401
0,51380416
3
154,141
2 1541,41249
3,18791887
4 -0,289202381
3 0,001366707 0,003892534 0,3 0,093 25,33909817 23,5407836
1,79831457
1
539,494
4 1798,314571
3,25486566
3 0,254865663
4 0,001366707 0,003892534 0,5 0,093 25,33909817 23,5407836
1,79831457
1
539,494
4 1078,988743
3,03301691
4 0,254865663
5 0,001366707 0,003892534 0,7 0,089 25,33909817 22,51317527
2,82592289
8
847,776
9 1211,109813
3,08318352
3 0,451160308
6 0,001366707 0,003892534 0,9 0,093 25,33909817 23,5407836
1,79831457
1
539,494
4 599,4381904
2,77774440
9 0,254865663
Tabel 4 . Perhitungan Isoterm
1. Nilai n = 1/b
= 0,263754814
2. Nilai K = log (0,6981)
= 4,989993731
y = 0.004x
R² = 0.9959
0
0.02
0.04
0.06
0.08
0.1
0.12
0.14
0 5 10 15 20 25 30 35
abs
konsentrasi
abs
Perhitungan
y = 583.05x
R² = -0.171
0
200
400
600
800
1000
1200
1400
1600
1800
2000
0 0.5 1 1.5 2 2.5 3
x/m
selisih konsentrasi
Langmuir
y = 1.213x + 2.3688
R² = 0.0625
0
0.5
1
1.5
2
2.5
3
3.5
-0.4 -0.3 -0.2 -0.1 0 0.1 0.2 0.3 0.4 0.5
Log
x/m
Log C
Freundilch
Pembahasan
Dalam penentuan adsorpsi isoterm menurut freundlich terhadap
proses adsorbsi asam asetat (CH3COOH) dan asam klorida (HCl) pada arang
aktif (karbon aktif). Prosedur yang dilakukan dengan penambahan karbon
aktif ke dalam larutan asam asetat dan asam klorida dengan variasi
konsentrasi, lalu ditutup dengan wraping hingga beberapa menit agar larutan
tidak terkontaminasi oleh lingkungan. Hal ini dilakukan karena sifat larutan
yang digunakan bersifat higroskopis terhadap lingkugan. Kemudian
dilakukan proses penyaringan sehingga menghasilkan residu dan filtrat, lalu
dititrasi dengan larutan standar (NaOH) dan menggunakan indikator
fenolftalein (PP) sebagai idikator perubahan warna akibat perubahan PH
larutan yang di titrasi. Reaksi-reaksi yang terjadi pada proses titrasi adalah:
CH3COOH + NaOH CH3COONa + H2O HCl + NaOH NaCl + H2O
Proses adsorpsi banyak digunakan dalam kehidupan sehari-hari
contohnya seperti deodoran yang digunakan pada ketiak untuk menghisap
keringat yang berlebih pada ketiak , karbon aktif pada filter penjernihan air
dalam depot air galon isi ulang untuk menghisap kotoran dalam air, tawas
dan kaporit juga di gunakan untuk penjernihan air dengan menggunkan
prinsif adsorpsi serta banyak lagi terapan penggunaan proses adsorpsi dalam
kehidupan sehari-hari.
Pembahasan
Dari hasil kurva Langmuir maupun kurva Freundlich, bahwa semakin
banyak jumlah karbon aktif yang ditambahkan, maka zat warna yang bisa
diserap atau diadsorb juga semakin banyak. Hal ini disebabkan karena
semakin banyak jumlah karbon aktif yang ditambahkan, maka jumlah
suspended solid dan molekul organik yang terdapat di dalam karbon aktif
juga semakin banyak, dimana suspended solid dan molekul organik
inilah yang bertugas menyerap atau mengadsorb warna dari larutan
sampel. Akan tetapi, jumlah adsorbat yang dapat diadsorp tiap satuan
berat adsorben menurun seiring dengan bertambahnya jumlah karbon
aktif yang ditambahkan. Hal ini disebabkan karena jumlah adsorbat yang
dapat diadsorp tersebut ditinjau tiap gram adsorben, sehingga meskipun
yang diserap semakin banyak maka jumlah adsorbat yang dapat diserap
tiap gramnya menjadi lebih sedikit.

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Analisis Isoterm Adsorbsi Pada Perairan

  • 1. Kelompok 15 Muhammad Raja Yustisia Yudhiputra (082001900047) Salsabila Syifa Nadiyah Khairunnisa (082001900061) Dosen Pengampu Dr. Ir. Diana Irvindiaty Hendrawan, Msi Pramiati Purwaningrum, S.T,M.T Asisten Labolatorium Sharfina Nadhilah JURUSAN TEKNIK LINGKUNGAN FAKULTAS ARSITEKTUR LANSKAP DAN TEKNOLOGI LINGKUNGAN UNIVERSITAS TRISAKTI JAKARTA 2020
  • 2. Cara Kerja Sampling Tuang air sampel yang diambil kedalam jerigen sampai penuh dan tutup agar tidak ada udara pada air sampel Bilas jerigen dengan air sampel Ambil air sampel ½ - 2/3 dari kedalaman sungai Ukur kedalaman sungai dengan media botol sampling Bilas botol sampler dan jerigen dengan aquades
  • 3. Cara Kerja Isoterm Adsorpsi Tuang larutan sampel ke dalam kuvet dan ukur serapan larutan sampel menggunakan spektrofotometer dengan panjang gelombang 610 nm. Setelah 30 menit, lakukan penyaringan masing-masing larutan sampel dan juga pembilasan kuvet dengan air suling Melakukan jartest dengan kecepatan 200 rpm selama 30 menit dan menyiapkan kertas saring untuk proses penyaringan Tambahkan karbon aktif berturut 0; 0,1; 0,3; 0,5; 0,7; 0,9 gram ke masing-masing gelas piala. Isi 300 mL air sampel B lab ke dalam masing-masing gelas piala
  • 4. Perhitungan Diketahui: Tabel Standar Konsentrasi Absorban 0 0 2 0,012 6 0,018 10 0,04 20 0,083 30 0,116 Data Diketahui a (intersep) 0,001366707 b (slope) 0,003892534 r2 (regresi) 0,9964 y = a + bX y = 0,00137 + 0,0039X Sampel Tabel Data Pengamatan Sampel Massa Karbon (gr) ABS 1 0 0,1 2 0,1 0,98 3 0,3 0,93 4 0,5 0,93 5 0,7 0,89 6 0,9 0,93 Ditanya: 1. Awal (konsentrasi sebelum dimasukkan karbon) 2. Akhir (konsentrasi setelah dimasukkan karbon) 3. Selisih 4. X (jumlah zat yang teradsorbsi) 5. x/m (kapasitas adsorbsi karbon 6. Log x/m 7. Log C (konsentrasi zat terlarut setelah mencapai kesetimbangan Tabel 1 . Tabel Standar Tabel 2 . Data Dikeahui Tabel 3 . Sampel Data Pengamatan
  • 5. Perhitungan 1. Awal = 𝐴𝑏𝑠𝑜𝑟𝑏𝑎𝑛 −𝐼𝑛𝑡𝑒𝑟𝑠𝑒𝑝 𝑆𝑙𝑜𝑝𝑒 = 0,1 −(0,003667075) 0,003892534 = 𝟐𝟓, 𝟑𝟑𝟗𝟎𝟗𝟖𝟏𝟕 2. Akhir = 𝐴𝑏𝑠 𝑚 𝑘𝑎𝑟𝑏𝑜𝑛 −𝐼𝑛𝑡𝑒𝑟𝑠𝑒𝑝 𝑚 𝑘𝑎𝑟𝑏𝑜𝑛 𝑆𝑙𝑜𝑝𝑒 𝑚 𝑘𝑎𝑟𝑏𝑜𝑛 = 0,098 −(0,003667075) 0,003892534 = 𝟐𝟒, 𝟖𝟐𝟓 3. Selisih = (konsentrasi awal) – (konsentrasi akhir) = (25,33909817) – (24,82529401) = 0,513804163 4. X = Selisih . sampel (mL) = 0,513804163 . 300 mL = 154, 1412 5. x/m = 𝑥 𝑚 = 154,1412 0,1 = 𝟏𝟓𝟒𝟏, 𝟒𝟏𝟐𝟒𝟗 6. Log x/m = log (x/m) = log (1541,41249) = 3,287918874 7. Log (c) = log (selisih) = log (513804163) = - 0,254865663
  • 6. Perhitungan no intersep (a) slope (b) m (gr) ABS Awal Akhir selisih x x/m Log x/m log c 1 0,001366707 0,003892534 0 0,1 25,33909817 25,33909817 0 0 0 0 0 2 0,001366707 0,003892534 0,1 0,098 25,33909817 24,82529401 0,51380416 3 154,141 2 1541,41249 3,18791887 4 -0,289202381 3 0,001366707 0,003892534 0,3 0,093 25,33909817 23,5407836 1,79831457 1 539,494 4 1798,314571 3,25486566 3 0,254865663 4 0,001366707 0,003892534 0,5 0,093 25,33909817 23,5407836 1,79831457 1 539,494 4 1078,988743 3,03301691 4 0,254865663 5 0,001366707 0,003892534 0,7 0,089 25,33909817 22,51317527 2,82592289 8 847,776 9 1211,109813 3,08318352 3 0,451160308 6 0,001366707 0,003892534 0,9 0,093 25,33909817 23,5407836 1,79831457 1 539,494 4 599,4381904 2,77774440 9 0,254865663 Tabel 4 . Perhitungan Isoterm 1. Nilai n = 1/b = 0,263754814 2. Nilai K = log (0,6981) = 4,989993731 y = 0.004x R² = 0.9959 0 0.02 0.04 0.06 0.08 0.1 0.12 0.14 0 5 10 15 20 25 30 35 abs konsentrasi abs
  • 7. Perhitungan y = 583.05x R² = -0.171 0 200 400 600 800 1000 1200 1400 1600 1800 2000 0 0.5 1 1.5 2 2.5 3 x/m selisih konsentrasi Langmuir y = 1.213x + 2.3688 R² = 0.0625 0 0.5 1 1.5 2 2.5 3 3.5 -0.4 -0.3 -0.2 -0.1 0 0.1 0.2 0.3 0.4 0.5 Log x/m Log C Freundilch
  • 8. Pembahasan Dalam penentuan adsorpsi isoterm menurut freundlich terhadap proses adsorbsi asam asetat (CH3COOH) dan asam klorida (HCl) pada arang aktif (karbon aktif). Prosedur yang dilakukan dengan penambahan karbon aktif ke dalam larutan asam asetat dan asam klorida dengan variasi konsentrasi, lalu ditutup dengan wraping hingga beberapa menit agar larutan tidak terkontaminasi oleh lingkungan. Hal ini dilakukan karena sifat larutan yang digunakan bersifat higroskopis terhadap lingkugan. Kemudian dilakukan proses penyaringan sehingga menghasilkan residu dan filtrat, lalu dititrasi dengan larutan standar (NaOH) dan menggunakan indikator fenolftalein (PP) sebagai idikator perubahan warna akibat perubahan PH larutan yang di titrasi. Reaksi-reaksi yang terjadi pada proses titrasi adalah: CH3COOH + NaOH CH3COONa + H2O HCl + NaOH NaCl + H2O Proses adsorpsi banyak digunakan dalam kehidupan sehari-hari contohnya seperti deodoran yang digunakan pada ketiak untuk menghisap keringat yang berlebih pada ketiak , karbon aktif pada filter penjernihan air dalam depot air galon isi ulang untuk menghisap kotoran dalam air, tawas dan kaporit juga di gunakan untuk penjernihan air dengan menggunkan prinsif adsorpsi serta banyak lagi terapan penggunaan proses adsorpsi dalam kehidupan sehari-hari.
  • 9. Pembahasan Dari hasil kurva Langmuir maupun kurva Freundlich, bahwa semakin banyak jumlah karbon aktif yang ditambahkan, maka zat warna yang bisa diserap atau diadsorb juga semakin banyak. Hal ini disebabkan karena semakin banyak jumlah karbon aktif yang ditambahkan, maka jumlah suspended solid dan molekul organik yang terdapat di dalam karbon aktif juga semakin banyak, dimana suspended solid dan molekul organik inilah yang bertugas menyerap atau mengadsorb warna dari larutan sampel. Akan tetapi, jumlah adsorbat yang dapat diadsorp tiap satuan berat adsorben menurun seiring dengan bertambahnya jumlah karbon aktif yang ditambahkan. Hal ini disebabkan karena jumlah adsorbat yang dapat diadsorp tersebut ditinjau tiap gram adsorben, sehingga meskipun yang diserap semakin banyak maka jumlah adsorbat yang dapat diserap tiap gramnya menjadi lebih sedikit.