Witra, Luthfiya Annisa and Rahmatillah, Elvia Sabella (2018) Pemanfaatan Karbon Aktif dari Tongkol Jagung untuk Penyisihan Logam Cr(VI). Sarjana thesis, Universitas Brawijaya.
Abstract
Kandungan logam Cr(VI) pada air limbah industri elektroplating dapat mencapai 117 mg/L. Kandungan tersebut masih jauh dari baku mutu air limbah untuk industri elektroplating, yaitu 0,1 mg/L, sehingga perlu dilakukannya penanganan lebih lanjut sebelum dilepas ke lingkungan. Salah satu metode yang dapat digunakan untuk mengurangi kandungan logam Cr(VI) yaitu adsorpsi. Pada penelitian ini dilakukan adsorpsi menggunakan adsorben berupa karbon aktif dari limbah tongkol jagung. Penelitian ini bertujuan untuk mengetahui pH terbaik pada kondisi asam (2, 3, 4, 5 dan 6) dan kecepatan pengadukan (100, 150, 200, 250 dan 300 rpm) terbaik pada proses adsorpsi. Limbah tongkol jagung dikarbonisasi pada suhu 600°C selama 1 jam dengan adanya aliran gas nitrogen. Karbon selanjutnya diaktivasi menggunakan larutan HCl 4 M dengan pengadukan selama 24 jam, untuk melarutkan kandungan anorganik dan tar yang menutupi pori karbon. Adsorpsi dilakukan secara batch selama 20, 40, 60, 80, 100 dan 120 menit. Karbon dan karbon aktif dikarakterisasi melalui uji FTIR, kadar air, kadar abu, kadar zat yang mudah menguap, dan kadar karbon terikat. Proses karbonisasi menghasilkan yield rata-rata sebesar 23,16%. Hasil uji karakteristik karbon dan karbon aktif meliputi kadar air 0,99% dan 1,47%, kadar abu 4,36% dan 2,26%, kadar zat yang mudah menguap 57,71% dan 52,82%, serta kadar karbon terikat 36,94% dan 42,98%. Karbon aktif yang dihasilkan memenuhi beberapa parameter baku mutu karbon aktif berdasarkan SNI diantaranya yaitu kadar air dan kadar abu, sementara untuk kadar zat yang mudah menguap dan kadar karbon terikat masih belum memenuhi SNI. Aktivasi menggunakan larutan HCl menghasilkan peningkatan intensitas gugus karbon-oksigen dan penurunan kandungan K2O dari 81,8% menjadi 16,2%. Kondisi terbaik yang diperoleh dalam adsorpsi logam Cr(VI) yaitu pada pH 2 dan kecepatan pengadukan 200 rpm (60 menit), dengan hasil penyisihan 90,37%.
English Abstract
The content of Cr (VI) metal in electroplating industrial wastewater can reach 117 mg/L. The content is still far from the wastewater quality standard for the electroplating industry, which is 0.1 mg/L, so that further handling is needed before it being released into the environment. One of several methods that can be used to reduce the metal content of Cr (VI) is adsorption. In this study adsorption was carried out using adsorbent in the form of activated carbon from corn cobs waste. This study aims to determine the best pH (2, 3, 4, 5 and 6) and the best stirring speed (100, 150, 200, 250 and 300 rpm) in the adsorption process. Corncob waste was carbonized at 600°C for 1 hour in the presence of nitrogen gas flow. Furthermore, the carbon will be activated using 4 M HCl solution in a stirred state for 24 hours, to dissolve the inorganic content and tar which cover the carbon pore. Adsorption is carried out in batches for 20, 40, 60, 80, 100 and 120 minutes. Carbon and activated carbon are characterized by FTIR test, water content, ash content, volatile matter content, and fixed carbon content. The carbonization process produces an average yield of 23.16%. Characteristic of carbon and activated carbon include water content of 0.99% and 1.47%, ash content of 4.36% and 2.26%, volatile matter content of 57.71% and 52.82%, and fixed carbon content of 36.94% and 42.98%. Activated carbon produced fulfill several parameters of quality standards of activated carbon based on SNI, which are water content and ash content, while for volatile matter content and fixed carbon content still not fulfilling SNI. Activation using HCl solution, increased carbon-oxygen group intensity and decreased K2O content from 81.8% to 16.2%. The best conditions, which were obtained in the adsorption of Cr (VI) metal, were at pH 2 and stirring speed of 200 rpm, in 60 minutes, with the removal of 90.37%.
| Item Type: | Thesis (Sarjana) |
|---|---|
| Identification Number: | SKR/FT/2018/1000/051811123 |
| Uncontrolled Keywords: | adsorpsi, logam Cr(VI), pH, kecepatan pengadukan adsorption, Cr (VI) metal, pH, stirring speed |
| Subjects: | 500 Natural sciences and mathematics > 541 Physical chemistry > 541.3 Miscellaneous topics in physical chemistry > 541.33 Surface chemistry > 541.335 Adsorption |
| Divisions: | Fakultas Teknik > Teknik Kimia |
| Depositing User: | Budi Wahyono Wahyono |
| Date Deposited: | 23 May 2019 01:43 |
| Last Modified: | 09 Mar 2022 02:41 |
| URI: | http://repository.ub.ac.id/id/eprint/162391 |
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