University of Guilan Caspian Journal of Environmental Sciences 1735-3033 21 3 2023 07 01 Mineral composition of the scallop, Placuna placenta shell from the eastern part of East Java Waters, Indonesia 685 691 6949 10.22124/cjes.2023.6949 EN Indah Wahyuni Abida Faculty of Fisheries and Marine Science, Universitas Brawijaya, Jl. Veteran 16 Malang 65145, East Java, Indonesia Sri Andayani Faculty of Fisheries and Marine Science, Universitas Brawijaya, Jl. Veteran 16 Malang 65145, East Java, Indonesia Uun Yanuhar Faculty of Fisheries and Marine Science, Universitas Brawijaya, Jl. Veteran 16 Malang 65145, East Java, Indonesia H. Hardoko Faculty of Fisheries and Marine Science, Universitas Brawijaya, Jl. Veteran 16 Malang 65145, East Java, Indonesia Journal Article 2023 07 30 The shell of bivalve such as <em>Placuna placenta</em> is one of many biomasses that is commonly used as bio-inspired and biomimetic material. Different habitat may influence the living of organism, including the biomineralization of <em>P. placenta</em> shell affecting their mineral composition. This study was aimed to know the mineral composition of the <em>P. placenta</em> shell collected from Ujung Pangkah-Grasik and Junganyar Socah-Bangkalan, Indonesia. Observation was carried out on the shell (near umbo) using SEM-EDX (Scanning Electron Microscope-Energy Dispersive X-ray Spectroscopy). The result showed that the<em> </em>shell collected from Junganyar Socah-Bangkalan have larger element quantities (9 types) than that from Ujung Pangkah-Gresik (6 types). The elements found on the shell collected from Junganyar Socah-Bangkalan were: C, O, Na, Mg, Si, Ca, S, Al, and Cl, while from Ujung Pangkah-Gresik were: C, O, Na, Mg, Ca, Zn, and S. The Na/Ca ratio of the shell from Ujung Pangkah-Gresik was higher than that from Junganyar Socah-Bangkalan. The Mg/Ca and S/Ca ratio of the shell from Junganyar Socah-Bangkalan was higher than that from Ujung Pangkah-Gresik.<br />  https://cjes.guilan.ac.ir/article_6949_03d6f9847a26eec1fa636745ec6a0f17.pdf