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All Journal VALENSI CAKRA KIMIA (Indonesian E-Journal of Applied Chemistry) INDONESIAN JOURNAL OF LEGAL AND FORENSIC SCIENCES Jurnal Kimia (Journal of Chemistry) Jurnal Riset Kimia Jurnal Kimia Riset Indonesia Chimica Acta Chemistry Indonesian Journal of Chemical Research Aceh International Journal of Science and Technology
Emmy Sahara
Program Studi Kimia FMIPA Universitas Udayana, Bukit Jimbaran, Bali
Agriculture, Biological Sciences & Forestry Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Control & Systems Engineering Decision Sciences, Operations Research & Management Dentistry Earth & Planetary Sciences Electrical & Electronics Engineering Engineering Environmental Science Law, Crime, Criminology & Criminal Justice Medicine & Pharmacology

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Bioavailability of Heavy Metals Cadmium (Cd) and Lead (Pb) In Agricultural Soils In The Tabanan Region and Their Accumulation In Gonda Plants (Sphenoclea zeylanica Gaertn) Lisdiantari, Ni Luh Gede; Suprihatin, Iryanti Eka; Sahara, Emmy
Jurnal Akta Kimia Indonesia (Indonesia Chimica Acta) Volume 16, No 2: December 2023
Publisher : Hasanuddin University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.70561/ica.v16i2.30021

Abstract

Farmers use organic and inorganic fertilizers and pesticides in order to maintain the quality of their crops. Excessive use of fertilizers and pesticides in long term can cause soil contamination. This research is about determining the level of bioavailability of Cd and Pb metals in gonda plants (Sphenoclea zeylanica Gaertn) and the amount dissolved in the soil. The stepwise extraction method is used to determine dissolved metal species and quantitationally determined using an Atomic Absorption Spectrophotometer (AAS). The content of Cd and Pb metals in the gonda plants obtained was 4.3328 and 1.4788 mg⁄kg. The bioavailable Cd and Pb in soil are 13.76% - 21.51% and 10.19 - 11.54%, respectively, the potentially bioavailable ones are 53.91 - 57.84% and 79.97 - 80.00. % and non-bioavailable metals, namely 24.58 - 28.39 and 8.46 - 9.84%. Based on SNI 7387:2009 regulations regarding the Maximum Limit for Heavy Metal Contamination in Food, the Cd and Pb metal contamination in gonda plants on the agricultural land in the observed area has exceeded the threshold of 0.2 mg⁄kg on Cd and 0.5 mg⁄kg on Pb.
Serbuk Gergaji Kayu Jati Teraktivasi EDTA Sebagai Penjerap Ion Tembaga (II) dan Krom (III) Irdhawati, Irdhawati; Triyunita Sinthadevi, Ni Nyoman; Sahara, Emmy
Indonesian Journal of Chemical Research Vol 7 No 2 (2020): Edisi Bulan Januari (Edition for January)
Publisher : Jurusan Kimia, Fakultas Sains dan Teknologi, Universitas Pattimura

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30598/ijcr.2020.7-ird

Abstract

Teak sawdust is a waste of the furniture industry. The main compound content is cellulose, which contains hydroxyl groups so that can be used as adsorbent. This work aims to determine adsorption capacity and isotherm adsorption pattern of teak sawdust activated by EDTA for copper (II) dan chromium (III) ions. Some parameters were optimized including the ratio of adsorbent and EDTA, and contact time. The results showed the optimum ratio of teak sawdust and EDTA was 2:3, and the optimum contact time was 105 minutes. Both of isoterm adsorption patterns of teak sawdust to Cu (II) and Cr (III) ions follow the Freundlich equation, with determination coefficient close to one. Optimum adsorption capacity was obtained 46.5 and 39.7 mg/g for Cu (II) and Cr (III), respectively.
Co-Authors A. A. I. A. M. Laksimawti Anak Agung Istri Agung Mayun Laksmiwati Arik Agustina Ayu Jyostosya Yotirani Arya Wijana D. E. Permatasaari Ekki Inur Ingtyas Mawarni Feby Silvia Feby Silvia Sitio Gde Agus Surya Cahyadi Gusti Agung Putu Merta Dharmayoga I Gede Darma Putra I Gusti Agung Gede Bawa I Gusti Ayu Kunti Sri Panca Dewi I Gusti Ngurah Raka Aryawan I K. Y. Resyana I Made Agus Gelgel Wirasuta I Made Siaka I Made Sutha Negara I Putu Adi Surya Mahardika I Wayan Hermawan I Wayan Suarsa I Wayan Sudiarta I. A. Gede Widihati Ida Bagus Putra Manuaba Irdhawati Irdhawati Iryanti Eka Suprihatin James Sibarani Kristina Indra Yanthy T Kusuma Hidayatullah Lisdiantari, Ni Luh Gede Manuntun Manurung Ni Kadak Nevi Titasia Ni Kadek Dahliani Ni Luh Eka Lusiana Dewi Ni Putu Diana Febriyanti Ni Putu Gita Widi Saraswati Ni Putu Widyana Kartini Nur Alisyah Gani Oka Ratnayani P. S. Sihombing Putu Sri Gayatri Putu Suarya Roedy Aris Tavip Rosanti Suryani Tince Mbatu Titasia, Ni Kadak Nevi Triyunita Sinthadevi, Ni Nyoman Vivi Eka Indrayani Wahyu Dwijani Sulihingtyas Wahyu Irwansyah Yulius Leo Adeputra