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All Journal Natural Science: Journal of Science and Technology KOVALEN: Jurnal Riset Kimia JKPK (Jurnal Kimia dan Pendidikan Kimia) KAIBON ABHINAYA : JURNAL PENGABDIAN MASYARAKAT Jurnal ABDINUS : Jurnal Pengabdian Nusantara Jurnal Riset Sains dan Kimia Terapan
Husain Sosidi
Analytical Chemistry, Chemistry Department, Tadulako University
Humanities Chemical Engineering, Chemistry & Bioengineering Chemistry Computer Science & IT Economics, Econometrics & Finance Education Environmental Science Industrial & Manufacturing Engineering

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Speciation and Bioavailability of Heavy Metals Pb and Cd in Palu Bay Sediments after the Earthquake and Tsunami Sosidi, Husain; Khairuddin; Ruslan; Abustiana, Rahma Lolita; Ramli, Aksar; Rahim, Erwin Abdul
KOVALEN: Jurnal Riset Kimia Vol. 11 No. 1 (2025): August Edition
Publisher : Chemistry Department, Mathematics and Natural Science Faculty, Tadulako University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22487/kovalen.2025.v11.i1.17671

Abstract

Major disturbances to seafloor morphology and input of terrestrial material due to the earthquake- tsunami in Palu City in 2018 have the potential to alter the chemical form (speciation), bioavailability, and flux of lead (Pb) and cadmium (Cd) in Palu Bay sediments. This study was conducted to analyze the speciation of Cd2+ ions and Pb2+ ions and determine the concentration of elusion ions using Diffusive Gradient in Thin Film (DGT). In this study, two methods were carried out, namely the fractionation method and the DGT method. The results showed that the analysis of ion speciation at 3 locations using the fractionation method obtained the highest concentration of Cd2+ ions of 1.4492 mg/L at location 1 and the highest concentration of Pb2+ ions of 0.0200 mg/L at location 3. The results of ion analysis at 3 locations using the DGT method obtained the highest elution yield concentration of Cd2+ ions of 0.0225 mg/L at location 1 and the highest elution yield concentration of Pb2+ ions of 0.0155 mg/L at location 3. This study shows that the presence of heavy metals Pb and Cd in Palu Bay sediments after the earthquake-tsunami is still detected with varying concentrations between locations. The fractionation method is able to describe the distribution of metal speciation in sediments, while the DGT method provides information on labile fractions that are more relevant to bioavailability. The combination of these two methods is important for understanding the potential risk of heavy metals to Palu Bay aquatic ecosystems and can be used as a basis for post-disaster environmental monitoring and management efforts.
Pembuatan Kertas pH dari Bahan Alam (Bunga) Sebagai Alternatif Pengganti Indikator Sintetis Di MGMP Kimia Kabupaten Donggala Puspitasari, Dwi Juli; Sosidi, Husain; Prismawiryanti, Prismawiryanti
Jurnal ABDINUS : Jurnal Pengabdian Nusantara Vol 6 No 3 (2022): Volume 6 Nomor 3 Tahun 2022
Publisher : Universitas Nusantara PGRI Kediri

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29407/ja.v6i3.16896

Abstract

The lack of learning resources, especially practicum infrastructure, causes practicum in schools to not be implemented. The subject of acid-base material which should be in an experiment cannot be applied due to limited indicators. The results of observations in the field showed that students could not distinguish between acidic and basic solutions because they did not get a lesson. Chemistry subject teachers in several high schools in Donggala Regency do not carry out practical work on acid-base materials because they never used natural materials such as flowers as pH paper. Therefore, it is necessary to increase the understanding of teachers regarding the concept of acids and bases and natural materials that can be used as natural indicators to replace synthetic indicators. This service activity was attended by 10 participants consisting of chemistry teachers who are members of the chemistry MGMP of Donggala Regency. Service activities are carried out by understanding the concept of acid-base and the use of natural materials as natural indicators also demonstrating and guidance on making pH paper from natural materials (flowers). This activity provides additional knowledge for teachers in the use of natural materials as a substitute for synthetic indicators in acid-base material practicum so that the quality of learning is expected to increase.
Co-Authors Abd. Rahman Abustiana, Rahma Lolita Ahmad Ridhay Aini Auliana Amar Arianto Buchari Buchari Darmawati Darmawati Dwi Juli Puspitasari Dwi Juli Pusptasari Dwi Juli Pusptasari Dwiyana, Putri Eka Lindawati Erwin Abdul Rahim Fitra Langgeng Mangesti Hardi Ys. Helni Febriani Indra Noviandri Indriani Indriani Jusman Jusman, Jusman Khairuddin Khairuddin Khairuddin Krisma Meylin Lasampa Lisma Habiba Minda M Mirzan, Muhamad Moh. Mirzan Moh. Mirzan Moh. Rifki Saputra Muh.Ricky Arisandi M. Tahili Musafira Musafira Ni Ketut Sumarni Nov Irmawati Inda Nurakhirawati Nurhaeni Prismawiryanti Prismawiryanti Ramli, Aksar Ruslan Ruslan Ruslan Ruslan Ruslan Sitti Nur Halizah Sutomo Eka Putra Syaiful Bahri Syamsuddin Syamsuddin Ulayya Kasio Wiranto Wengkau Yul Uca Sali Putri