Faculty of Science and Technology, Universitas Islam Negeri Ar-Raniry Banda Aceh, Jl. Syekh Abdurrauf No. 1, Banda Aceh, 23111, Indonesia.
Department of Geophysics, Faculty of Mathematics and Natural Sciences, Universitas Padjadjaran, Jl. Raya Bandung Sumedang KM.21, Bandung, 45363, Indonesia.
Environ Monit Assess. 2022 Mar 2;194(3):239. doi: 10.1007/s10661-022-09891-z.
Estuaries have very complex mechanisms because they are influenced by seawater intrusion, which causes enrichment of contaminants in the maximum turbidity area. Magnetic susceptibility measurements have been used for monitoring a wide variety of environments. However, there have been few studies of the magnetic properties of surface sediments from estuaries in volcanic environments in the tropics. This study investigates the magnetic properties and their correlations with the geochemistry of surface sediments in estuaries in volcanic areas and was conducted in the Krueng Aceh River, Indonesia. Measurements consist of magnetic susceptibility measurements, chemical analysis, and mineralogical analysis. Measurements of magnetic susceptibilities were performed using a Bartington MS2 instrument with an MS2B sensor using frequencies of 460 and 46 kHz. X-ray fluorescence (XRF) and energy-dispersive spectroscopy (EDS) were used to identify elements in the sediments. Scanning electron microscopy (SEM) analysis was used to analyze sediment grains. X-ray diffraction (XRD) analysis was used to determine mineral contents. For the first time, χ/χ ratios were found to be an obvious parameter for identifying areas of sediment traps and metal enrichment in the estuary turbidity maxima (ETM) zone. The magnetic properties carried by volcanic rock minerals consist of pigeonite and enstatite. These two minerals have not been previously considered as carriers of sediments with magnetic properties when monitoring heavy metal enrichment in urban rivers. These results provide an extension of the use of magnetic susceptibility measurements in environmental studies, particularly in estuary river environments in volcanic areas such as the Krueng Aceh River, Indonesia.
河口具有非常复杂的机制，因为它们受到海水入侵的影响，这导致污染物在最大浑浊度区域富集。磁化率测量已被用于监测各种环境。然而，对于热带火山环境河口表层沉积物的磁性研究很少。本研究调查了火山地区河口表层沉积物的磁性特征及其与地球化学的关系，该研究在印度尼西亚的亚齐河（Krueng Aceh River）进行。测量包括磁化率测量、化学分析和矿物学分析。磁化率测量使用 Bartington MS2 仪器和 MS2B 传感器在 460 和 46 kHz 的频率下进行。X 射线荧光（XRF）和能量色散光谱（EDS）用于识别沉积物中的元素。扫描电子显微镜（SEM）分析用于分析沉积物颗粒。X 射线衍射（XRD）分析用于确定矿物含量。首次发现，χ/χ 比是识别河口浊度最大值（ETM）区沉积物捕集区和金属富集区的明显参数。火山岩矿物携带的磁性由顽辉石和单斜辉石组成。这两种矿物以前在监测城市河流重金属富集时，并未被认为是具有磁性的沉积物的载体。这些结果扩展了磁化率测量在环境研究中的应用，特别是在印度尼西亚的亚齐河等火山地区的河口河流环境中。
