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Journal : Indonesian Journal of Chemistry

Adsorption and Desorption of Na+ and NO3− Ions on Thermosensitive NIPAM-co-DMAAPS Gel in Aqueous Solution Ningrum, Eva Oktavia; Purwanto, Agus; Mulyadi, Eka Octaviyatna; Dewitasari, Dinny Islamiah; Sumarno, Sumarno
Indonesian Journal of Chemistry Vol 17, No 3 (2017)
Publisher : Universitas Gadjah Mada

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Abstract

Adsorbent gel with the ability to absorb and to desorb Na+ and NO3− ions simultaneously with temperature swing was synthesized by free radical copolymerization reaction of N-isopropylacrylamide (NIPAM) and N,N-dimethyl-(acrylamidopropyl)ammonium propane sulfonate (DMAAPS). In this study, NIPAM acts as a thermosensitive agent and DMAAPS as an adsorbent agent. The purpose of this research is to investigate the effect of temperature and solution concentration on the swelling, adsorption, and desorption behaviors of NIPAM-co-DMAAPS gel. The relationship between adsorption and desorption behaviors of the gel was also elucidated. NaNO3 solution was selected as the target solution in swelling, adsorption, and desorption test. It was observed that the swelling degree of the gel increased as temperature and solution concentration raised. The adsorption amount of ions decreased with the increase of temperature. In contrast, the amount of ions desorbed from the gel increased linearly with temperature.
Removal Efficiency of Nitrite and Sulfide Pollutants by Electrochemical Process by Using Ti/RuIrO2 Anode Mukimin, Aris; Purwanto, Agus
Indonesian Journal of Chemistry Vol 18, No 2 (2018)
Publisher : Universitas Gadjah Mada

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Abstract

In general, wastewater treatment by physical, chemical and biological methods are only focused on TSS, BOD and COD removals that the effluent still contains anion pollutant as NO2- and S2-. Electrochemical technology is a proper method for those pollutants treatment due to its fast process, easy operation and minimum amount of sludge. Electrocatalytic reactor with 8 L capacity using Ti/RuIrO2 cylinder as anode and Fe plate as cathode was arranged and applied to treat anion pollutants. Hydraulic retention time (30, 60, 90 and 120 min), salt concentration (250, 500 and 750 mg/L) and voltage (4, 5, and 6 V) were chosen as operation variables and NO2- and S2- concentrations as parameter indicators. Nitrite removal efficiency reached 75 and 99.7% after 60 and 120 min of electrolysis, respectively, while sulfide could obtain higher efficiency, i.e., 97 and 99.9% after 60 and 90 min, respectively, at operation variables of potential of 5 V and salt of 500 mg/L. Removal process is dominated by indirect oxidation mechanism by HClO/ClO- oxidators generated at anode surface as intermediate products. The lifespan of electrode and electric consumption are two main factors of operation cost. Electric consumed was 0.452 kWh per 1 g nitrite removed.
Co-Authors - Isdiyarto . HERNAYANTI . HERY WINARSI Abdurohman Muslim Abdurrahman, Naufal Adhy Karyo Nugroho Adi Putra Setianto Adila Ashari Partono, Adila Ashari Adimas Wahyu Saputro Agung Budiarto, Agung Agustikasa, Dyah Kurniawati Akhmad Aminuddin Bama, Akhmad Aminuddin Alice Yuniati Alqodri, Achmad Fatih Andika Fajar Andreani Hanjani Anggun Nugroho, Anggun Anif Jamaluddin Anindita Putri Nurmalita Sari Anisa Agni Putri Aris Mukimin Arkhan Subari Artawan, I Nengah Arum Purwandari Bagus, Asep Bhagas Adhitya Ardia Pratama Bintoro Anang Subagyo, Bintoro Anang Budhy Kurniawan Budiwati Budiwati Budiyono Budiyono Chintya Fadila Laksmitaningrum Dadan Rosana Darmadi, Eko Agus Decy Lukitasari DEDDY MUCHTADI Dewitasari, Dinny Islamiah Dhanindra Prabowo, Dhanindra Dina Dina, Dina Dwi Harjanto, Ganang Dwi Ratmono Eddy Santoso Endang Kwartiningsih Endang Mastuti Eny Sri Widyastuti Erika Rani Eva Oktavia Ningrum, Eva Oktavia Febryanita, Renna Firdaus, Muhammad Sai FRANSISKA RUNGKAT ZAKARIA Gde Sastrawangsa, Gde Hanny Vistanty, Hanny Hatmoko, Bayu Dwi Hendri Widiyandari Heny Kusumayanti HERNAYANTI HERNAYANTI Heru Sukamto, Heru HERY WINARSI I Kadek Ariana, I Kadek Ida Hayu Dwimawanti Ihyaul Ulum Imam Ghozali Indah Nuraeni Intan Fatimah Hizbullah, Intan Fatimah Irfan Hafid Irnaning Handayani, Novarina Ischiadica Elharomy Isni Nurruhwati Jidanah Darmiyati Jumari, Arif Kuncoro Diharjo Kusumadewi, RR Karlina Aprilia Lila Yuwana Lilik Eka Radiati M. Refai Muslih Mety Nuraini Miratul Atiqah Mugihardjo, Herry Muhammad Baru Herman, Muhammad Baru Muhammad Setio Priambodo, Muhammad Mulyadi, Eka Octaviyatna Mulyoto ,, Mulyoto Nilawati Nilawati Nugraheni, Anggiyani Ratnaningtyas Eka Nur Cahyonowati Nur Kadarisman Nur Zen, Nur Nurkholis Nurkholis Nurtjahjo Dwi Sasongko Nur’aini, Anafi Oktita Earning Hanifah Paryanto Prasetiyo, Agus Eko Purwaningrum, Fajar Adhi Rafika Rahmawati Rahma Ayu Maharani Rame Rame, Rame Rame, Rame Ratnawati Ratnawati Reny Yesiana, Reny Richardus Eko Indrajit Risha Aristiani N, Risha Rosita, Galuh Chynintya Rosita Ruliaty, Lisa Sari, Septi Shofwan Hanief, Shofwan Silvy Djayanti, Silvy Siwi P. M. Wijayanti Siwi P.M. Wijayanti SIWI PRAMATAMA MARS WIJAYANTI Stephani Novitasari Christianingsih Kaluti Suharno Suharno Suharto, Toni Suharto, Toni Sumarna Sumarna Sumarna, . Sumarno Sumarno Suratsih Suratsih Taufiq Bagus Prasojo Wicaksono, Kukuh Aryo Wisnu Ari Adi Yohanes Dwi Saputra, Yohanes Dwi Yuniar Mulyani Yuvita Avrie Diany