Studi Ketahanan [Cu3(C6H3(COO)3)2(H2O)3]n (HKUST-1) Terhadap Radiasi Gamma Pada Dosis 125 kGy Hingga 200 kGy
Vioresta Ferian Efsa Fernanda, Ferdiansjah, S. T., M. Eng. Sc, Imam Kambali, S. T., M.Phil., Ph.D.
2023 | Skripsi | TEKNIK NUKLIR
Manajemen limbah radioaktif gas dan cair menjadi tantangan besar bagi perkembangan energi nuklir, terutama apabila zat tersebut berisiko mudah menyebar ke lingkungan. Hong-Kong University of Science and Technology-1 (HKUST-1) merupakan material berpori yang berpotensi menjadi adsorben radioaktif karena memiliki daya adsorpsi dan efisiensi adsorpsi yang tinggi. Namun, ketahanan radiasi dari material HKUST-1 juga perlu untuk dipertimbangkan ketika digunakan sebagai adsorben radioaktif. Oleh karenanya, penelitian ini dilakukan untuk menganalisis efek dari radiasi gamma terhadap karakteristik HKUST-1.
Pada penelitian ini HKUST-1 diproduksi dengan metode solvotermal bersuhu 100
Berdasarkan hasil pengukuran, kenaikan dosis menghasilkan ukuran grain kristal cenderung turun. Kenaikan dosis menyebabkan bentuk kristal memiliki titik sudut cenderung tajam dan nilai kristalinitasnya meningkat dari 15,49% hingga 17,70%, kecuali pada dosis 175 kGy bentuk titik sudut kristal menjadi tumpul dan kristalinitasnya turun menjadi 16,21%. Pada hasil uji BET diperoleh kecenderungan kenaikan volume gas teradsorpsi dari 212,186 cm3/g hingga 340,335 cm3/g, kenaikan luas permukaan dari 520,379 m2/g hingga 917, 048 m2/g, dan kenaikan volume pori dari 0,424 cm3/g hingga 0,615 cm3/g,. Sebaliknya, radius pori menurun dari 1,631 nm menjadi 1,341 nm, kecuali pada dosis 175 kGy yang memiliki nilai 1,399 nm. Hasil tersebut meningkat dari 1,352 nm milik 150 kGy.
Gas and liquid
radioactive waste management is a big challenge in nuclear energy applications,
especially if the radioactive substances have a risk of quickly spreading into
the environment. Hong-Kong
University of Science and Technology-1 (HKUST-1), as a porous material, has
excellent potential to become a radioactive adsorbent due to its high
adsorption capacity and efficiency. However, the radiation resilience of
HKUST-1 should be considered when using this material as a radioactive
adsorbent. The purpose of this study is to analyze the effect of gamma
irradiation on the characteristics of HKUST-1.
In this study, HKUST-1 was produced by the solvothermal
method at 100°C. This research studied the gamma radiation effect on HKUST-1 at
doses of 125, 150, 175, and 200 kGy. The irradiation was conducted at Iradiator
Gamma Merah Putih (IGMP) in Serpong, Indonesia, using cobalt-60 with an
activity of 145 kCi. SEM test with specification Jeol JSM IT-200, XRD test with
X-ray source copper 40 kV, and adsorption test using nitrogen adsorbat were
performed to evaluate changes in material characteristics.
The test results showed that crystal grain size decreased
as the dose increased. The increase in the dose also caused the crystal shape
to have sharper corners, and the crystallinity value increased from 15.49% to
17.70%. However, at a dose of 175 kGy, the crystalline corner points became
obtuse, and the degree of crystallinity decreased to 16.21%. The isothermal
adsorption results showed an increased trend of adsorbed gas volume from
212.186 cm3/g to 340.335 cm3/g, surface area from 520.379
m2/g to 917.048 m2/g, and pore volume from 0.424 cm3/g
to 0.615 cm3/g. In contrast, the pore radius decreased from 1.631 nm
to 1.341 nm, except at the 175 kGy, the value was 1.399 nm. This result was
higher than the sample irradiated at 150 kGy, which had value of 1.352 nm..
Kata Kunci : Iradiasi Gamma, HKUST-1, Karakteristik Material, SEM, XRD, Adsorpsi Isotermal.
