Septianingsih, Fatin (2021) PERHITUNGAN KAPASITAS ADSORPSI ION Cr(VI) OLEH KARBON AKTIF DARI KULIT PISANG KEPOK DIAKTIVASI H2SO4. Sarjana thesis, Universitas Brawijaya.
Abstract
Industri batik yang semakin berkembang, berdampak bagi lingkungan sekitar karena limbah cair yang dihasilkan mengandung logam berat salah satunya krom (Cr) dalam bentuk krom heksavalen (Cr(VI)). Pada penelitian ini kulit pisang kepok sebagai karbon aktif digunakan untuk menurunkan kadar ion Cr(VI) melalui proses adsorpsi.Karbon dikarbonisasi pada suhu 600oC selama 90 menit dengan ukuran karbon lolos ayakan 80 mesh. Karbon kulit pisang kepok diaktivasi dengan menggunakan larutan H2SO4 2 M dengan perbandingan rasio massa:volume yaitu 1:2 dan direndam selama 24 jam pada suhu ruang. Pengujian karakteristik karbon dan karbon aktif kulit pisang kepok menunjukkan bahwa karbon aktif kulit pisang kepok memenuhi standar menurut uji SNI 06-3730-1995, didapatkan kadar air sebesar 5%, kadar abu sebesar 7,5%, kadar bagian yang hilang pada pemanasan 950oC sebesar 23%, dan kadar karbon terikat sebesar 69,5%. Uji luas permukaan karbon aktif dengan daya serap methylene blue didapatkan sebesar 638,001 m2/g. Hasil proses adsorpsi ion Cr(VI) menunjukkan pengaruh konsentrasi awal ion Cr(VI) terhadap persen penyisihan ion Cr(VI) mengalami pengaruh yang signifikan dimana semakin tinggi nilai konsentrasi awal maka persen penyisihan akan bernilai lebih rendah. Diperoleh persen penyisihan ion Cr(VI) tertinggi yaitu 99,9% pada konsentrasi 10 ppm dan persen penyisihan Cr(VI) terendah yaitu 75,64% pada konsentrasi 50 ppm. Pada konsentrasi 10 ppm, 20 ppm, 30 ppm pada akhir menit 180 sudah memenuhi baku mutu maksimum Cr(VI) di air limbah sedangkan pada konsentrasi40 ppm dan 50 ppm belum memenuhi. Adsorpsi ion logam Cr(VI) menggunakan adsorben kulit pisang kepok diaktivasi H2SO4 mengikuti pola isoterm Langmuir dengan kapasitas adsorpsi maksimum yaitu sebesar 2,0064 mg/g.
English Abstract
Fatin Septianingsih dan Triatmi Lusita Julianti SIS, Chemical Engineering Department, Engineering Faculty, Brawijaya University, June 2021, Calculation of Adsorption Capacity of Cr(VI) Ions by Activated Carbon from Kepok Banana Peel. Supervisor A.S. Dwi Saptati Nur Hidayati, ST., MT. dan Ir. Bambang Ismuyanto, MS. Growth of batik industry has an impact on the surrounding environment since the liquid waste produced contains heavy metal compounds such as chromium (Cr), lead (Pb), nickel (Ni), copper (Cu), and manganese (Mn) (Natalina and Hidayati, 2017). The chromium metal contained in the liquid waste was found in the form of hexavalent chromium (Cr(VI)) with concentration between 2,361 mg/L to 74,298 mg/L. According to the Regulation of the Minister of the Environment , the contamination level has exceeded the maximum quality standard of Cr(VI) in wastewater, which is 0.5 mg/L. Adsorption method can be used to reduce the excess of heavy metal Cr(VI). The adsorption process using activated carbon from kepok banana peels as a natural adsorbent has been widely carried out. According to previous research, the adsorbent of activated carbon from kepok banana peel is quite effective because it has a high carbon content which will affect the quality and quantity of activated carbon produced. Carbon made from kepok banana peel was carbonized at 600˚C for 90 minutes. With the size of the carbon passed a sieve of 80 mesh. Kepok banana peel carbon was activated using 2 M H2SO4 solution with a ratio of mass and volume of 1:2 then soaked for 24 hours at room temperature. Prior to the adsorption process, the carbon and activated carbon of the kepok banana peel were carried out by FT-IR analysis to determine the functional groups. As well as testing according to SNI 06-3730-1995, namely water content test, ash content test, vanished content test whilst heating at 950˚C, and pure carbon content test. Analysis of the content of Cr(VI) was carried out by UV-Vis spectrophotometry test. The results of the characteristic test of banana peel activated carbon showed that the kepok banana peel activated carbon met the standards according to the SNI 06-3730-1995 test, the water content was 5%, the ash content was 7,5%, the vanished content whilst heating at 950˚C was 23% and pure carbon content was 69,5%. The surface area test with methylene blue adsorption got an adsorption capacity of 172.07 mg/g and an activated carbon surface area of 638.001 m2 /g. The results of the Cr(VI) ion adsorption process showed that the effect of the initial concentration of Cr(VI) on the percent removal of Cr(VI) had a significant effect where the higher the initial concentration value, the lower the removal percentage. The highest removal percentage of Cr(VI) was 99.9% at a concentration of 10 ppm and the lowest removal percentage of Cr(VI) was 75.64% at a concentration of 50 ppm. At a concentration of 10 ppm; 20 ppm; 30 ppm at the end of 180 minutes has met the maximum quality standard of Cr(VI) in wastewater while at concentrations of 40 ppm and 50 ppm it has not met. The adsorption of metal ions Cr(VI) using a kepok banana peel adsorbent was activated by H2SO4 follow suit the Langmuir isotherm pattern with a maximum adsorption capacity of 2.0064 mg/g. Keywords : Activated Carbon, Adsorption, Hexavalent Chromium, Kepok Banana Peel
Other obstract
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| Item Type: | Thesis (Sarjana) |
|---|---|
| Identification Number: | 660 |
| Uncontrolled Keywords: | Kata kunci : Adsorpsi, Karbon Aktif, Kulit Pisang Kepok, Kromium Heksavalen-- Activated Carbon, Adsorption, Hexavalent Chromium, Kepok Banana Peel |
| Subjects: | 600 Technology (Applied sciences) > 660 Chemical engineering and related technologies |
| Depositing User: | Unnamed user with email gaby |
| Date Deposited: | 20 Oct 2021 06:38 |
| Last Modified: | 24 Feb 2022 05:01 |
| URI: | http://repository.ub.ac.id/id/eprint/184327 |
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