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All Journal Jurnal Rekayasa Proses Indonesian Journal of Chemical Science Jurnal Rekayasa Proses Jurnal Teknologi dan Inovasi Industri
Elida Purba
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Automotive Engineering Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Civil Engineering, Building, Construction & Architecture Computer Science & IT Education Social Sciences

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Kajian Awal Laju Reaksi Fotosintesis untuk Penyerapan Gas CO2 Menggunakan Mikroalga Tetraselmis Chuii Elida Purba; Ade Citra Khairunisa
Jurnal Rekayasa Proses Vol 6, No 1 (2012)
Publisher : Departemen Teknik Kimia Fakultas Teknik Universitas Gadjah Mada

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (258.205 KB) | DOI: 10.22146/jrekpros.2451

Abstract

Penelitian ini dilatarbelakangi oleh meningkatnya konsentrasi CO2 di udara akibat dari pembuangan proses industri dan pembakaran bahan bakar sehingga dapat menyebabkan global warming. Oleh karena itu dilakukan penelitian tentang pengurangan konsentrasi CO2 melalui reaksi fotosintesis menggunakan mikroalga Tetraselmis chuii. Tujuan penelitian ini untuk mendapatkan konstanta laju reaksi menggunakan Tetraselmis chuii. Penelitian dilakukan dengan menjenuhkan media kultur air laut terlebih dahulu dengan gas CO2, sehingga pengaruh difusi CO2 ke dalam media kultur dapat diabaikan. Kemudian mikroalga dimasukkan ke dalam fotobioreaktor dengan berbagai kondisi operasi. Kondisi operasi yang divariasikan adalah temperatur yakni, 28C, 30C, dan 35oC serta umpan gas CO2 sebesar 4, 9, dan 14% dengan rancangan percobaan acak lengkap. Hasil penelitian menunjukkan bahwa penyerapan tertinggi diperoleh pada suhu 30C dan 35oC untuk setiap konsentrasi masukan CO2.. Orde reaksi terhadap CO2 belum dapat disimpulkan karena tidak ada beda nyata faktor koreksi (R) pada setiap grafik untuk persamaan order reaksi 1, 2, dan 3. Kata kunci : fotobioreaktor, penyerapan, Tetraselmis chuii, konstanta laju reaksi, konsentrasi CO2 The background of the present study was the facts that the increase of carbon dioxides concentration in the air due to industrial activities and fossil fuel combustion certainly leads to global warming. In order to reduce carbon dioxides concentration, photosynthesis reaction using Tetraselmis chuii was one of the potential methods to use. The present study aimed at determining the rate constant of reaction that used Tetraselmis chuii. The study was carried out by firstly saturating sea water as a culture media with carbon dioxide in order to reduce the influence of carbon dioxide diffusion through the media. Microalgae were then put inside the photo-bioreactor at different operating conditions. The operating variables investigated in the present work were temperature (28C, 30C and 35C) and inlet CO2 gas concentration (4, 9 and 14%) with a complete random experimental design. Experimental results showed that the highest absorption capacity was achieved at 30C and 35C for each inlet CO2 concentration. However, the order of reaction with respect to CO2 concentration could not have been determined since the correction factors (R) values obtained from graphical analysis of first, second and third order reactions were not significantly different. Keywords : photo-bioreactor, absorption, Tetraselmis chuii, reaction rate constant, CO2 concentration
Kajian Awal Laju Reaksi Fotosintesis untuk Penyerapan Gas CO2 Menggunakan Mikroalga Tetraselmis Chuii Elida Purba; Ade Citra Khairunisa
Jurnal Rekayasa Proses Vol 6, No 1 (2012)
Publisher : Departemen Teknik Kimia Fakultas Teknik Universitas Gadjah Mada

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22146/jrekpros.2451

Abstract

Penelitian ini dilatarbelakangi oleh meningkatnya konsentrasi CO2 di udara akibat dari pembuangan proses industri dan pembakaran bahan bakar sehingga dapat menyebabkan global warming. Oleh karena itu dilakukan penelitian tentang pengurangan konsentrasi CO2 melalui reaksi fotosintesis menggunakan mikroalga Tetraselmis chuii. Tujuan penelitian ini untuk mendapatkan konstanta laju reaksi menggunakan Tetraselmis chuii. Penelitian dilakukan dengan menjenuhkan media kultur air laut terlebih dahulu dengan gas CO2, sehingga pengaruh difusi CO2 ke dalam media kultur dapat diabaikan. Kemudian mikroalga dimasukkan ke dalam fotobioreaktor dengan berbagai kondisi operasi. Kondisi operasi yang divariasikan adalah temperatur yakni, 28C, 30C, dan 35oC serta umpan gas CO2 sebesar 4, 9, dan 14% dengan rancangan percobaan acak lengkap. Hasil penelitian menunjukkan bahwa penyerapan tertinggi diperoleh pada suhu 30C dan 35oC untuk setiap konsentrasi masukan CO2.. Orde reaksi terhadap CO2 belum dapat disimpulkan karena tidak ada beda nyata faktor koreksi (R) pada setiap grafik untuk persamaan order reaksi 1, 2, dan 3. Kata kunci : fotobioreaktor, penyerapan, Tetraselmis chuii, konstanta laju reaksi, konsentrasi CO2 The background of the present study was the facts that the increase of carbon dioxides concentration in the air due to industrial activities and fossil fuel combustion certainly leads to global warming. In order to reduce carbon dioxides concentration, photosynthesis reaction using Tetraselmis chuii was one of the potential methods to use. The present study aimed at determining the rate constant of reaction that used Tetraselmis chuii. The study was carried out by firstly saturating sea water as a culture media with carbon dioxide in order to reduce the influence of carbon dioxide diffusion through the media. Microalgae were then put inside the photo-bioreactor at different operating conditions. The operating variables investigated in the present work were temperature (28C, 30C and 35C) and inlet CO2 gas concentration (4, 9 and 14%) with a complete random experimental design. Experimental results showed that the highest absorption capacity was achieved at 30C and 35C for each inlet CO2 concentration. However, the order of reaction with respect to CO2 concentration could not have been determined since the correction factors (R) values obtained from graphical analysis of first, second and third order reactions were not significantly different. Keywords : photo-bioreactor, absorption, Tetraselmis chuii, reaction rate constant, CO2 concentration
Mercury (Hg) Adsorption in Traditional Gold Mining Liquid Waste with Activated Carbon from Coffee Ground Salsabilla Muharani; Elida Purba
Indonesian Journal of Chemical Science Vol 12 No 1 (2023)
Publisher : Universitas Negeri Semarang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.15294/ijcs.v12i1.67083

Abstract

Merkuri merupakan salah satu jenis logam berat yang banyak digunakan secara bebas dalam proses amalgamisasi pada pertambangan emas skala kecil (PESK), salah satunya di Kabupaten Lampung Selatan, Lampung. Pemakaian logam merkuri tersebut dapat menyebabkan kerusakan lingkungan dan menjadi ancaman serius bagi kesehatan manusia. Tujuan penelitian ini adalah mengurangi kadar merkuri pada limbah sebelum dilepaskan ke lingkungan menggunakan proses adsorpsi dan mendapatkan kondisi optimum dalam proses adsorpsi menggunakan adsorben karbon aktif ampas kopi dengan memvariasikan waktu kontak adsorpsi dan massa adsorbent. Variasi waktu kontak yang digunakan yaitu (30; 60; 90) menit dan variasi massa yaitu (2; 3; 4) g/100ml dengan pengadukan sebesar 90 rpm. Analisis sampel dilakukan dengan analisis FTIR (Fourier Transform Infrared Spectroscopy) Agilent Technologies Carry 630 dan Atomic Absorption Spectrofotometry (AAS) Agilent 240Z series. Hasil dari penelitian didapatkan, kondisi optimum waktu kontak selama 90 menit dan dosis adsorben sebanyak 4gr/100ml, kapasitas adsorpsi karbon aktif ampas kopi terhadap logam merkuri (Hg) sebesar 0,0687 mbHg/grC dengan penurunan kadar logam merkuri pada limbah setelah adsorpsi mencapai 99,93%. Pemodelan isoterm diwakili oleh model isoterm Langmuir. Studi ini menunjukan bahwa karbon aktif dari ampas kopi dapat dimanfaatkan sebagai adsorben berbiaya rendah untuk menurunkan kadar logam Hg pada limbah cair pertambangan emas tradisional.
Microalgae Production Tetraselmis sp., Thalassiosira sp. and Porphyridium sp. with a Combination of EMS & UV-C Mutations Based on Biomass and Lipid Content per Liter of Culture Elida Purba; Iksan
Jurnal Teknologi dan Inovasi Industri (JTII) Vol. 6 No. 1 (2025)
Publisher : Fakultas Teknik, Universitas Lampung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23960/jtii.v6i1.109

Abstract

This study aims to determine the effect of giving both aspects, namely, EMS mutagen and UV-C light on microalgae Tetraselmis sp., Thalassiosira sp ., and Porphyridium sp. so that the comparison can be known on biomass and lipid productivity. Both EMS and UV-C mutagen treatments were applied to wild-type and mutated microalgae. Culturing was carried out for 7 days in a photobioreactor with a capacity of 8L. The treatment of mutated microalgae was added with 0.5 M EMS and UV-C irradiation for 3 min. Cell density was calculated from day 1 to 7 in each type of microalgae using a haemocytometer. The results showed that mutagens caused a decrease in cell density in Tetraselmis sp., Thalassiosira sp., and Porphyridium sp. by 37%, 50%, and 2%, respectively, from the wild type. The biomass results showed that mutagens caused a decrease in microalgae Tetraselmis sp. and Porphyridium sp. by 21% and 13%, but an increase in microalgae Thalassiosira sp. by 4% from the wild type. Mutagens also affect the lipid content of microalgae because they significantly increase the lipid content of mutated microalgae Tetraselmis sp., Thalassiosira sp., and Porphyridium sp. by 20.54%, 11.20%, and 20.39%, respectively.
Co-Authors Ade Citra Khairunisa Iksan Salsabilla Muharani