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Variation of Chemical Elements and their Associations in Laterite Soil Profile Tufaila, M; Safiuddin, La Ode; Eso, Rosliana; Kasmiati, Sitti; Syaf, Hasbullah; Nur Ramadhan, La Ode Ahmad; Hasrorayan, .; Ardin, .
JOURNAL OF TROPICAL SOILS Vol. 20 No. 2: May 2015
Publisher : UNIVERSITY OF LAMPUNG

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.5400/jts.2015.v20i2.111-118

Abstract

The objective of this study was to evaluate the variations of twelve chemical elements (Ni, Fe, Co, Mg, Mn, Al, Si, Zn, Ti, P, Ca and Cr) in laterite soil profiles from Wantulasi area in South East Sulawesi Province of Indonesia. Eighty four (84) samples of three profiles (i.e. each profile consists of eight samples) had been used to study their variations in soil using the X-Ray Fluorescence (XRF). Results analysis of the chemical elements content in three profile using XRF indicated that there were good correlationsbetween the chemical elements in the soil profile with the significant correlations were found in Ni and Fe, Ni and Si, Ti and P, Fe and Al, and Co and Mn, respectively. On the other hand,the results of study showed that the variations of the chemical elements could be related to the enrichment and translocation of the elements in soil profile and also their possibilities to be related with a given chemical elements in soil profile. Therefore, we suggest that the observed patterns in chemical elements with a good correlation in laterite profile can be used as proxies to integrate the evaluation of the chemical and physical weathering process based on the elements characteristics in soil profiles.
Heavy Metal Absorption in Lasolo Bay using a Composite of Cashew-Based Activated Charcoal and Iron Sand, Southeast Sulawesi, Indonesia Eso, Rosliana; Irawati; Bahdat; Asmadin; Arman; Alfat, Syahdin; Hasan, Erzam S
Jurnal Ilmu dan Teknologi Kelautan Tropis Vol. 17 No. 2 (2025): Jurnal Ilmu dan Teknologi Kelautan Tropis
Publisher : Department of Marine Science and Technology, Faculty of Fisheries and Marine Science, IPB University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29244/jitkt.v17i2.63332

Abstract

Penelitian ini menggunakan komposit karbon aktif dari cangkang mete dan ekstrak pasir besi untuk mengurangi kadar logam berat (Cu, Ni, Zn, Pb, dan Cd) dalam air laut yang tercemar di teluk Lasolo Provinsi Sulawesi Tenggara. Ukuran butir komposit divariasikan menjadi 60 mesh, 100 mesh, dan 200 mesh dengan rasio arang aktif terhadap pasir besi sebesar 2:3 untuk memperoleh daya serap yang optimal. Komposit kemudian dipadatkan menjadi pelet dengan tekanan pemadatan masing-masing sebesar 42,2 Pa, 84,8 Pa, dan 141,5 Pa guna mencapai kekuatan tekan optimum dari komposit. Konsentrasi unsur logam berat diukur menggunakan Spektrofotometer Serapan Atom (AAS). Tekanan pemadatan optimal pada komposit ditemukan pada 141,5 Pa, dengan efisiensi penyerapan sebesar 61% untuk Zn, 96% untuk Pb, 48% untuk Cd, 90% untuk Cu, dan 94% untuk Ni. Berdasarkan hasil penelitian, penyerapan tertinggi diperoleh pada komposit dengan ukuran butir 200 mesh, dengan efisiensi penyerapan sebesar 62,21% untuk Zn, 96,87% untuk Pb, 48,14% untuk Cd, 90,98% untuk Cu, dan 94,15% untuk Ni. Semakin besar tekanan pemadatan yang diberikan pada komposit, semakin tinggi persentase penyerapan pelet komposit. Sebaliknya, semakin halus ukuran butir komposit, semakin besar daya serapnya.
IoT-Based Vaname Shrimp Pond Water Quality Monitoring Using the Quamonitor Tool syafirah, Marwana; Eso, Rosliana; Husein
ELECTRON Jurnal Ilmiah Teknik Elektro Vol 5 No 1: Jurnal Electron, Mei 2024
Publisher : Jurusan Teknik Elektro Fakultas Teknik Universitas Bangka Belitung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33019/electron.v5i1.149

Abstract

Pond water pollution is the main problem in vannamei shrimp cultivation, so to overcome this problem, The decline in water quality is caused by a decline in the quality of pH, salinity and temperature in pond water. Researchers created the Quamonitor tool to monitor IoT-based vaname shrimp pond water. The research was conducted using the Research and Development (R&D) method with the Analyze, Design, Develop, Implement and Evaluate (ADDIE) model, assisted by WiFi, MQTT and Node Red networks to monitor water in order to display monitoring results on Android. This study aims to monitor the condition of vaname shrimp pond water quality in the form of pH, temperature, and salinity parameters using pH E-4052C sensor, DS18B20 temperature sensor, TDS/Conductivity DFRobot V1.0 sensor and NodeMCU ESP32 as a data manager and system controller that runs in real time. The test results of PH sensors, temperature sensors and TDS/conductivity sensors obtained a sensor error percentage of 0.29% for pH parameters, 1.7% for temperature parameters and 0.41% for salinity parameters. Based on the sensor error value, Thingspeak graph display, real time monitor display on Android, it can be said that the manufacture of the Quamonitor tool for IoT-based vaname shrimp pond water quality monitoring is successful and can function well