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PREPARASI DAN KARAKTERISASI KATALIS Ni, Co YANG DIEMBANKAN PADA ZEOLIT-ZCP-50 MENGGUNAKAN METODE MATRIK POLIMER Rodiansono, Rodiansono; Irawan, Chairul; Mujiyanti, Dwi Rasy
Jurnal Sains dan Terapan Kimia Vol 3, No 1 (2009)
Publisher : Jurnal Sains dan Terapan Kimia

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Abstract

Telah dilakukan preparasi katalis Ni, Co, dan kombinasinya (Ni-Co) yangdiembankan pada hybrid zeolite-ZCP-50 menggunakan metode matrik polimer PEG-6000.Katalis hasil preparasi dikarakterisasi meliputi keasaman (ammonia dan pyridine), luaspermukaan, volume pori menggunakan metode adsorpsi isotermal N2 (BET), difraksisinar-X (XRD) and SEM (scanning electron microscopy).Hasil karakterisasi menunjukkan bahwa katalis logam Ni, Co dan Ni-Co telahberhasil dipreparasi menggunakan metode matrik polimer dengan tingkat keasamantertinggi pada Co/zeolite-ZCP-50 (monometallic), dan Ni-Co/zeolite-ZCP-50 untuk katalisbimetallic. Penambahan ZCP-50 pada zeolit memberikan kontribusi yang besar pada luaspermukaan spesifik, rerata jejari pori dan volume total pori. Tingkat dispersi logam padapermukaan padatan pengemban zeolite-ZCP-50 lebih baik dibandingkan dengan zeoliteasal.Kata kunci: katalis, Ni dan Co, zeolit, ZCP-50, pengemban hybrid
Pengolahan Limbah Perendaman Karet Rakyat dengan Metode Koagulasi dan Flokulasi Menggunakan Aluminium SUlfat, Ferri Klorida, dan Poli Aluminium Klorida (PAC) Suwandi, Riskawanti; Honesty, Loveana Brena; Irawan, Chairul; Rachmadi, Andri Taruna
Biopropal Industri Vol 7, No 1 (2016)
Publisher : Balai Riset dan Standardisasi Industri Pontianak

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Abstract

Rubber is one of important commodities in Central Kalimantan with more than 220.000 tons productions in 2013. However, the rubber immersion wastewater which has been discharged into the water body becomes problem. This research aims to know the effect of Al2(SO4)3, FeCl3 and PAC as coagulant in doses 2 g/L, 4 g/L and 8 g/L to reduce COD, BOD5, TSS, TDS and color concentration of the wastewater. Jar-Test was used with rapid mixing 200 rpm for 3 minute and slow mixing 50 rpm for 10 minute then settlled for 1 hour. The results showed that PAC with the dose of 4 g/L was better in reducing the COD, BOD5 and TSS than FeCl3 and Al2(SO4)3. After coagulation-flocculation, COD, BOD5 and TSS are 37,07 mg/L, 14,29 mg/L and 24,00 mg/L, respectively. On the other hand, TDS and color value showed higher concentration than standard with 514,00 mg/L and 106,00 PtCo, respectively.Keywords: Al2(SO4)3, coagulation-flocculation, FeCl3, PAC, rubber immersion wastewater ABSTRAKKaret merupakan salah satu komoditas penting di Provinsi Kalimantan Tengah dengan total produksi lebih dari 220.000 ton di tahun 2013. Permasalahan dalam produksi karet rakyat adalah limbah cair dari perendaman karet yang biasanya dibuang langsung ke badan air. Salah satu metode pengolahan limbah cair perendaman karet adalah dengan proses koagulasi-flokulasi. Penelitian ini dilakukan untuk mengetahui pengaruh jenis dan dosis koagulan Al2(SO4)3, FeCl3 dan PAC dengan dosis masing-masing sebesar 2 g/L, 4 g/L dan 8 g/L terhadap proses pengolahan limbah perendaman karet dengan metode koagulasi-flokulasi berdasarkan parameter COD, BOD5, TSS, TDS dan warna sebelum dan sesudah pengolahan. Penelitian ini dilakukan dengan menggunakan Jar-Test pada pengadukan cepat 200 rpm selama 3 menit, dilanjutkan pada pengadukan lambat 50 rpm selama 10 menit dan pengendapan selama 1 jam. Berdasarkan hasil penelitian diperoleh hasil bahwa PAC lebih baik dalam mereduksi konsentrasi COD, BOD5, TSS, TDS dan warna. Dosis yang disarankan berdasarkan penelitian ini sebesar 4 g/L. Konsentrasi COD, BOD5, TSS, TDS dan warna limbah perendaman karet sebelum proses koagulasi dan flokulasi belum memenuhi baku mutu Keputusan Menteri Negara Lingkungan Hidup No. KEP-51/MENLH/10/1995. Setelah diolah, didapatkan konsentrasi COD, BOD5 dan TSS berturut-turut sebesar 37,07 mg/L, 14,29 mg/L dan 24,00 mg/L yang telah memenuhi standar baku mutu limbah cair karet tetapi pada konsentrasi TDS 514,00 mg/L dan warna 106,00 PtCO masih belum memenuhi standar baku mutu limbah cair karet sehingga perlu pengolahan lebih lanjut sebelum dibuang.Kata kunci: Al2(SO4)3, FeCl3, koagulasi-flokulasi, limbah perendaman karet, PAC
PENGURANGAN KADAR ASAM LEMAK BEBAS (FREE FATTY ACID) DAN WARNA DARI MINYAK GORENG BEKAS DENGAN PROSES ADSORPSI MENGGUNAKAN CAMPURAN SERABUT KELAPA DAN SEKAM PADI Irawan, Chairul; Awalia, Tiara Nur; W.P.H, Sherly Uthami
Konversi Vol 2, No 2 (2013): Oktober 2013
Publisher : Universitas Lambung Mangkurat

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20527/k.v2i2.82

Abstract

Penggunaan  minyak goreng yang berulang- ulang dapat merubah struktur fisik dan kimia tersebut sesuai dengan komposisi dan jenis minyak. Beberapa perubahan yang terjadi pada minyak  setelah  penggorengan yaitu perubahan  warna dan  terurainya  komponen  penyusun  minyak menjadi senyawa lain yaitu Free Fatty Acid. Penelitian ini bertujuan untuk mengetahui pengaruh pemakaian  campuran adsorben dalam mengurangi kadar FFA dan warna pada minyak jelantah. Adsorben yang digunakan berupa sekam padi dan serabut kelapa yang sudah diaktivasi. Adsorben dibuat dengan membakar masing-masing bahan yaitu sekam dan serabut kelapa dan diaktivasi menggunakan H3PO4 1 M. Adsorben yang diperoleh digunkan untuk mengadsorpsi minyak jelantah sebanyak 5, 10 dan 20% dari berat minyak dengan variasi komposisi campuran sekam dan serabut kelapa dengan perbandingan  30:70 ; 70:30 ; 50:50 ; 100:0 dan 0:100. Adsorben yang telah disiapkan dimasukkan ke dalam gelas beker yang berisi minyak jelatah kemudian dilakukan proses adsorpsi minyak menggunakan pemanas dan magnetic stirrer. Proses adsorpsi berlangsung secara batch selama 60 menit pada suhu 80oC dengan kecepatan pengadukan 100 rpm. Setelah disaring, minyak jelantah  dianalisa kadar FFA, warna, densitas dan kadar air. Hasil penelitian yang maksimum untuk kondisi yang dijalankan didapatkan dengan menggunakan berat adsorben sebanyak 20%  dari berat minyak dengan perbandingan komposisi sekam dan serabut kelapa 30:70 dengan kadar FFA 0,294% dan warna 295 PtCo dengan penurunan sebesar 57,07% serta penurunan nilai warna sebesar 37,04%.Kata kunci: adsorbsi, sekam padi, serabut kelapa, FFA, dan warna minyakCooking oils that used frequently will be destructed the physical and chemical of its composition and  structure. The treatment of waste cooking oil is challenging due to the pressure of undesirable component such as FFA and colour degradation. This research  aims are investigated  the ability of mixed adsorbent  from rice husk and coir coconut fiber to reduce FFA and colour of  waste cooking oil. The adsorbent was activated with H3PO4 1 M. This adsorben use about 5, 10, and 20% of weight waste cooking oil with composition mixing adsorbent of rice husk and coir coconut fiber 30:70 ; 70:30 ; 50:50 ; 100:0 and 0:100  have  prepared. Adsorben put into beaker glass of waste cooking oil then batch adsorption  proccess  was going on about 1 hour use heater and magnetic stirrer with mixing speed 100 rpm and temperature 80oC, then  filtered  and analyzed in order of FFA, colour, density, and water content. As the result, the best dose adsorben  for maximum reduce FFA was 20% of weight waste cooking oil with composition mixing adsorbent of rice husk and coir coconut fiber 30:70 which gave FFA was 0,294% and value of colour was 295 PtCo.The effectivity reduce for FFA was 57,07% and value of colour was 37,04%.Keywords : Adsorption, Rice Husk, Coir Coconut Fiber, FFA, and Colour
POTENSI HAYATI SERAT PURUN TIKUS (ELEOCHARIS DULCIS) DALAM PROSES ADSORPSI KANDUNGAN LOGAM BERAT MERKURI (Hg), TSS DAN COD PADA LIMBAH CAIR PERTAMBANGAN EMAS Irawan, Chairul; Ardiansyah, Ardiansyah; Hanan, Naisya
Konversi Vol 3, No 1 (2014): April 2014
Publisher : Universitas Lambung Mangkurat

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20527/k.v3i1.133

Abstract

Abstrak- Aktivitas pertambangan emas di Kalimantan berpotensi menghasilkan limbah yang termasuk dalam Bahan Beracun Berbahaya (B3) seperti merkuri. Upaya yang dilakukan untuk mengatasi pencemaran ini salah satunya adalah dengan metode adsorpsi. Serat purun tikus mengandung selulosa yang cukup tinggi yaitu sekitar 40,92% sehingga dapat dijadikan sebagai adsorben. Tujuan penelitian ini adalah mempelajari kemampuan serat purun tikus sebagai adsorben alami, mempelajari proses pengolahan biokomposit serat purun tikus dengan material nanopartikel besi oksida,dan mengetahui pengaruh hasil penambahan nanopartikel besi oksida untuk membuat biokomposit serat purun tikus dalam upaya menurunkan kandungan logam berat Hg, Total Suspended Solid (TSS)dan Chemical Oxygen Demand(COD) pada limbah cair pertambangan emas. Serat purun tikus (PT) didelignifikasi menggunakan larutan 1% NaOH kemudian PT-D ini dibuat menjadi biokomposit dengan magnet besi oksida nanopartikel menggunakan metode one-pot solvothermal reaction. Biokomposit ini divariasi menjadi dua jenis yaitu tanpa penambahan gugus amina (PT-M) dan dengan penambahan gugus amina (PT-MA). Karakterisasi yang dilakukan terdiri dari uji Scanning Electron Microscopic(SEM) dan X-Ray Diffraction (XRD). Proses adsorpsi dilakukan selama 8 jam dengan kecepatan pengadukan 150 rpm. Analisa setelah adsorpsi menggunakan metode AAS (Atomic Absorption Spectrophotometer) untuk uji kadar Hg, metode titrimetri untuk COD, dan metode gravimetri untuk TSS.Hasil adsorpsi merkuri (Hg), COD, dan TSS paling optimum pada pH 7 dengan keefektifan masing-masing sebesar 65,04%, 80%, dan 81,25%. Kapasitas adsorpsi maksimum PT-D, PT-M, dan PT-MA terhadap Hg masing-masing sebesar 6,504 mg/g, 6,984 mg/g, dan 6,911 mg/g. Penambahan magnet besi oksida nanopartikel dapat memperbesar kemampuan adsorben serat purun tikus. Kata Kunci : adsorpsi, biokomposit, merkuri, PT, COD, TSSAbstract- Activity of gold mining in Kalimantan potentially can give waste that include into  “Bahan Beracun Berbahaya (B3)” such as mercury. An effort to make out this  contamination is adsorption method. Eleocharis dulcis contain high amount of cellulose, about 40,92% so it can be used as an adsorbent. The purpose of this research are studying the capability of eleocharis dulcis as a natural adsorbent, studying the process of biocomposite making from eleocharis dulcis with iron oxide nanoparticle, and studying  the influent of result iron oxide nanoparticle added to biocomposite in order to make a lower amount of heavy metal mercury (Hg), Total Suspended Solid (TSS) dan Chemical Oxygen Demand (COD) in waste water of gold mining. Eleocharis dulcis (PT) through     delignification process use 1% NaOH solution and then  the PT-D is made to become biocomposite with iron oxide nanoparticle apply “one-pot solvothermal reaction” method. The biocomposite have two variation: without amina cluster added (PT-M)  and with amina cluster added (PT-MA). It’s characterization are consist of Scanning Electron Microscope (SEM) and X-Ray Diffraction (XRD). Adsorption process is applied for 8 hours with mixing rate is 150 rpm. Analysis after adsorption process including three methods: AAS (Atomic Absorption Spectrophotometer) method for Hg analysis, titrimetric method for COD, and gravimetric method for TSS.  The result of adsorption process for mercury (Hg), COD, and TSS are optimally at pH 7 which the value of their effectiveness are 65,04%,  80%, and 81,25%. The maximum amount of Hg  adsorption capacity for PT-D, PT-M, and PT-MA respectively are 6,504 mg/g, 6,984 mg/g, and 6,911 mg/g. The addition of iron oxide nanoparticle can increase adsorben capability of eleocharis dulcis. Keywords : adsorption, biocomposite, mercury, PT, COD, TSS
Kondisi Optimum Pemisahan Aseton dari Campuran Aseton-Etanol-Air-n–Butanol Dengan Kolom Distilasi Vacuum Irawan, Chairul; Nata, Iryanti Fatyasari
INFO-TEKNIK Vol 6, No 1 (2005): INFOTEKNIK VOL. 6 NO. 1 2005
Publisher : Engineering Department, Lambung Mangkurat University

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Abstract

Fermenting molasses using clostridium acetobutilycum can produce a mixture of acetone (1)/ethanol (2)/water (3)/n-butanol (4). The fermentation products are then separated and purified in a series of distillation column. In this work the products are 99.5-wt % of acetone and 99 % recovery.This work is primarily concerned with the effect of operating pressure on the distillation column performance. Distillation columns were designed using computer programs written in VISUAL FORTRAN 5.0. A rigorous equilibrium based computation method due to Wang-Henke that taking into account the effects of non-equal molar overflow and non-ideal vapor-liquid equilibrium was used in study. UNIQUAC, a method of estimating activity coefficient in non-ideal liquid mixtures, was used to model the vapor–liquid equilibrium. The column performance was studied by varying the operating pressure that is constrained by the cooling water temperature in the condenser. The numbers of plates are 50 and feed plate location at 12th plate below the condenser for acetone column. Variation of pressure 0.7 to 0.6 atm for acetone column will decrease 6.03 % reflux ratios, 4.3% condenser and 4.78% reboiler duty. Optimum condition for acetone column was 0.6 atm. 
Recovery of Aluminum from Aluminum Coated Plastic Waste using Pyrolysis Process Irawan, Chairul; Jelita, Rinny; Nata, Iryanti Fatyasari
Reaktor Volume 18 No. 1 March 2018
Publisher : Dept. of Chemical Engineering, Diponegoro University

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (71.575 KB) | DOI: 10.14710/reaktor.18.1.38-44

Abstract

This study aims to separate aluminum metal in aluminum coated plastic waste so that it is known the obtained aluminum characteristics, to study the effects of temperature on the yield of solids and aluminum,  and to get the kinetic parameters that describe the effects of temperature on pyrolysis process rate. Plastic waste was cleaned, dried, cut, and weighed as much as 100 grams. Pyrolysis lasted in room temperature in 2 hours after the pyrolysis temperature was reached, i.e. 450oC. The formed smoke was condensed and weighed every 10 minutes from the first droplet until the pyrolysis time was completed. The remaining solids in the reactor were taken after the pyrolysis was completed and reactor temperature reached room temperature. The aluminum mixture was subsequently melted, molded and cooled. Experiments were repeated in various pyrolysis temperature variations (500°C, 550°C, 600°C and 650°C). The results show that the increase of pyrolysis temperature will decrease the yield of solids, while the aluminum yield remains. The obtained aluminum metal is 5.3% against the initial plastic mass in purity of 95.80%. The kinetic model representing plastic pyrolysis process is a single reaction model with the value of kinetic parameters of pre-exponential factor (A) 18.2689 min-1 and the activation energy value (E) 40.2310 kJ/mole.   Keywords: aluminum, pyrolysis, plastic wastes, temperature, kinetic parameter
Biopolymer of Chitosan from Fish Scales as Natural Coagulant for Iron–Contaminated Groundwater Treatment Irawan, Chairul; Nata, Iryanti Fatyasari; Putra, Meilana Dharma; Marisa, Rosmasari; Asnia, Mira; Arifin, Yulian Firmana
Jurnal Rekayasa Kimia & Lingkungan Vol 13, No 2 (2018): Jurnal Rekayasa Kimia dan Lingkungan, Vol. 13, No. 2, Desember 2018
Publisher : Chemical Engineering Department, Syiah Kuala University, Banda Aceh, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (325.208 KB) | DOI: 10.23955/rkl.v13i2.10601

Abstract

Chitosan, the de-acetylated chitin derivative, was evaluated for its ability to be used as a natural coagulant for Martapura groundwater treatment. This study is used chitosan derived from original fish scales of Kalimantan called Papuyu (Anabas testudineus) for the treatment of iron ion-containing Martapura groundwater through coagulation-flocculation method. The reduction efficiency of iron ion removed by coagulation-flocculation processes using chitosan from Papuyu fish scales is the primary evaluating parameter. The obtained chitosan have been characterized and analyzed by Fourier transforms infrared spectroscopy (FTIR), X-ray Fluroscence (XRF) and Scanning electron microscopy (SEM). Using of the chitosan from Papuyu fish scales as coagulant at neutral pH and room temperature led to decreasing the groundwater iron concentration become 3.43 mg/L (around 71% removal). The result was then compare to the coagulation-flocculation treatment using the commercial chitosan from shrimps shell (93% deacetylated). Moreover, its found the coagulation-flocculation treatment using the chitosan from fish scales as coagulant more favor than the commercial one.
Penyisihan Bahan Organik Alami pada Desalinasi Air Rawa Asin Menggunakan Proses Koagulasi-Pervaporasi Rahma, Aulia; Elma, Muthia; Mahmud, Mahmud; Irawan, Chairul; Pratiwi, Amalia Enggar; Rampun, Erdina Lulu Atika
Jurnal Kimia Sains dan Aplikasi Vol 22, No 3 (2019): Volume 22 Issue 3 Year 2019
Publisher : Chemistry Department, Faculty of Sciences and Mathematics, Diponegoro University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14710/jksa.22.3.85-92

Abstract

Kandungan bahan organik alami dalam air yang tinggi menyebabkan air rawa berwarna coklat dan tidak layak untuk digunakan. Selain itu, intrusi air laut yang terjadi saat pasang maksimum ke dalam aquifer rawa menyebabkan air rawa menjadi asin yang disebut sebagai air rawa asin. Koagulasi merupakan salah satu metode yang efektif digunakan untuk menyisihkan kandungan bahan organik. Namun, metode tersebut tidak mampu menyisihkan salinitas pada air rawa asin. Oleh karena itu, kombinasi proses koagulasi dan pervaporasi merupakan metode yang menjanjikan untuk digunakan dalam mereduksi baik parameter bahan organik (UV254) maupun salinitas (konduktivitas) pada air rawa asin. Tujuan dari penelitian ini adalah untuk menginvestigasi dosis optimum koagulan untuk menyisihkan UV254 pada proses koagulasi sebagai pra-perlakuan pervaporasi dan untuk menganalisis performa koagulasi-pervaporasi membran silika-pektin untuk mereduksi bahan organik dan salinitas air rawa asin. Koagulan yang digunakan pada proses koagulasi ini adalah aluminium sulfat dengan variasi dosis 10-60 mg L-1. Proses pervaporasi menggunakan membran yang terbuat dari silika-pektin pada suhu umpan operasi ~25°C (suhu ruang). Kondisi optimum pra-perlakuan koagulasi didapatkan pada dosis alum 30 mg L-1 dengan efisiensi penyisihan tertinggi sebesar 81,8% (UV254) dan 5,4% (konduktivitas). Kombinasi koagulasi-pervaporasi membran silika-pektin menunjukkan nilai rejeksi yang sangat tinggi yaitu 99,9% (NaCl) dan 88,8% (UV254). Selain itu pervaporasi membran silika-pektin menghasilkan water flux 17,7% lebih tinggi daripada water flux umpan air rawa asin tanpa pra-perlakuan koagulasi yaitu 5,4 kg.m-2.h-1. Kombinasi proses koagulasi dan pervaporasi membran silika-pektin dalam penelitian ini efektif untuk menyisihkan parameter UV254 dan NaCl air rawa asin hanya dengan operasi pada suhu ruang.
Utilization of Rice Husk Cellulose as a Magnetic Nanoparticle Biocomposite Fiber Source for the Absorption of Manganese (Mn2+) Ions in Peat Water Effendi, Emil Zacky; Hariady, Yudhi Christian; Salaahuddin, Muhammad Daffa; Irawan, Chairul; Nata, Iryanti Fatyasari
Jurnal Kimia Sains dan Aplikasi Vol 22, No 6 (2019): Volume 22 Issue 6 Year 2019
Publisher : Chemistry Department, Faculty of Sciences and Mathematics, Diponegoro University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14710/jksa.22.6.220-226

Abstract

Rice husk (RH) is an agricultural waste that contains cellulose. Rice husk fiber (RHF) can be used as a source of fiber in the manufacture of magnetic nanoparticle biocomposite. The purpose of this study is to synthesize and characterize magnetic nanoparticle biocomposite used as an adsorbent and evaluate its performance on the adsorption of  Mn2+ ions and Total Suspended Solid (TSS) in peat water. Rice husk fiber was delignified to eliminate lignin levels. Furthermore, the biocomposite was made through the solvothermal method with and without the addition of hexanediamine. The products produced are two types of adsorbents, namely magnetic nanoparticle biocomposite with an amino group (RHB-MH) and rice husk fiber biocomposite without an amino group (RHB-M). These biocomposites were used to adsorb Mn2+ ions in peat water. Evaluations were carried out at pH 5, 6, 7, and 8 with an optimum adsorption time of 60 minutes. The solutions at the time of adsorption were evaluated to determine the optimum conditions of the adsorption process carried out. The observation of magnetic nanoparticle biocomposite based on the analysis of Scanning Electron Microscopy (SEM) shows magnetic nanoparticles formed on the surface of rice husk fiber with a diameter of 30-50 nm. X-Ray Diffraction (XRD) analysis showed that the delignification of rice husk increased Crystallinity Index (CrI) by 64.98% and reduced silica content by 78%. Fourier Transform Infra-Red (FT-IR) spectrometer show absorption peak at 570 cm-1 for Fe-O bonds and Fe3O4 peak around 1627 cm?1, indicating the presence of N-H bending. The optimum condition for Mn2+ adsorption was achieved at pH 5 and 60-minutes duration with an adsorption capacity of 54.7 mg/g and 190.78 mg/g for RHB-M and RHB-MH. The TSS reduction achieved the effectiveness of 60.2% and 90.3% for BSP-M and BSP-MH, respectively.
POTENSI HAYATI SERAT PURUN TIKUS (ELEOCHARIS DULCIS) DALAM PROSES ADSORPSI KANDUNGAN LOGAM BERAT MERKURI (Hg), TSS DAN COD PADA LIMBAH CAIR PERTAMBANGAN EMAS Irawan, Chairul; Ardiansyah, Ardiansyah; Hanan, Naisya
Konversi Vol 3, No 1 (2014): April 2014
Publisher : Universitas Lambung Mangkurat

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20527/k.v3i1.133

Abstract

Abstrak- Aktivitas pertambangan emas di Kalimantan berpotensi menghasilkan limbah yang termasuk dalam Bahan Beracun Berbahaya (B3) seperti merkuri. Upaya yang dilakukan untuk mengatasi pencemaran ini salah satunya adalah dengan metode adsorpsi. Serat purun tikus mengandung selulosa yang cukup tinggi yaitu sekitar 40,92% sehingga dapat dijadikan sebagai adsorben. Tujuan penelitian ini adalah mempelajari kemampuan serat purun tikus sebagai adsorben alami, mempelajari proses pengolahan biokomposit serat purun tikus dengan material nanopartikel besi oksida,dan mengetahui pengaruh hasil penambahan nanopartikel besi oksida untuk membuat biokomposit serat purun tikus dalam upaya menurunkan kandungan logam berat Hg, Total Suspended Solid (TSS)dan Chemical Oxygen Demand(COD) pada limbah cair pertambangan emas. Serat purun tikus (PT) didelignifikasi menggunakan larutan 1% NaOH kemudian PT-D ini dibuat menjadi biokomposit dengan magnet besi oksida nanopartikel menggunakan metode one-pot solvothermal reaction. Biokomposit ini divariasi menjadi dua jenis yaitu tanpa penambahan gugus amina (PT-M) dan dengan penambahan gugus amina (PT-MA). Karakterisasi yang dilakukan terdiri dari uji Scanning Electron Microscopic(SEM) dan X-Ray Diffraction (XRD). Proses adsorpsi dilakukan selama 8 jam dengan kecepatan pengadukan 150 rpm. Analisa setelah adsorpsi menggunakan metode AAS (Atomic Absorption Spectrophotometer) untuk uji kadar Hg, metode titrimetri untuk COD, dan metode gravimetri untuk TSS.Hasil adsorpsi merkuri (Hg), COD, dan TSS paling optimum pada pH 7 dengan keefektifan masing-masing sebesar 65,04%, 80%, dan 81,25%. Kapasitas adsorpsi maksimum PT-D, PT-M, dan PT-MA terhadap Hg masing-masing sebesar 6,504 mg/g, 6,984 mg/g, dan 6,911 mg/g. Penambahan magnet besi oksida nanopartikel dapat memperbesar kemampuan adsorben serat purun tikus. Kata Kunci : adsorpsi, biokomposit, merkuri, PT, COD, TSSAbstract- Activity of gold mining in Kalimantan potentially can give waste that include into  ?Bahan Beracun Berbahaya (B3)? such as mercury. An effort to make out this  contamination is adsorption method. Eleocharis dulcis contain high amount of cellulose, about 40,92% so it can be used as an adsorbent. The purpose of this research are studying the capability of eleocharis dulcis as a natural adsorbent, studying the process of biocomposite making from eleocharis dulcis with iron oxide nanoparticle, and studying  the influent of result iron oxide nanoparticle added to biocomposite in order to make a lower amount of heavy metal mercury (Hg), Total Suspended Solid (TSS) dan Chemical Oxygen Demand (COD) in waste water of gold mining. Eleocharis dulcis (PT) through     delignification process use 1% NaOH solution and then  the PT-D is made to become biocomposite with iron oxide nanoparticle apply ?one-pot solvothermal reaction? method. The biocomposite have two variation: without amina cluster added (PT-M)  and with amina cluster added (PT-MA). It?s characterization are consist of Scanning Electron Microscope (SEM) and X-Ray Diffraction (XRD). Adsorption process is applied for 8 hours with mixing rate is 150 rpm. Analysis after adsorption process including three methods: AAS (Atomic Absorption Spectrophotometer) method for Hg analysis, titrimetric method for COD, and gravimetric method for TSS.  The result of adsorption process for mercury (Hg), COD, and TSS are optimally at pH 7 which the value of their effectiveness are 65,04%,  80%, and 81,25%. The maximum amount of Hg  adsorption capacity for PT-D, PT-M, and PT-MA respectively are 6,504 mg/g, 6,984 mg/g, and 6,911 mg/g. The addition of iron oxide nanoparticle can increase adsorben capability of eleocharis dulcis. Keywords : adsorption, biocomposite, mercury, PT, COD, TSS