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Anchoring Bimetallic Nanoparticles on Photocatalyst for Aflatoxin B1 degradation

Abstract

Photocatalytic materials decorated with bi-metallic nanoparticles (Bi-Metallic NPs/ photocatalyst) was synthesized for the degradation of aflatoxin B1. Bi-metallic NPs/ photocatalyst were synthesized by ultrasonic irradiation. The as-synthesized was characterized the chemical characteristics by the transmission electron microscope (TEM), X-ray photoelectron spectroscopy (XPS), X-ray diffraction analysis (XRD), Fourier transform infrared spectrometer (FT-IR), zeta potential analyzer, and UV-visible spectrophotometer. Bi-metallic NPs/photocatalyst was used to evaluate the degradation efficiency of AFB1 in household wastewater under visible light. The degradation process was analyzed using high-performance liquid chromatography (HPLC) at a wavelength of 365 nm, revealing that AFB1 was completely degraded 100% within 2 minutes. This superior performance is attributed to its highly porous structure, increased specific surface area, and reduced electron-hole recombination rate, which demonstrate that the developed nanomaterial has successfully achieved AFB1 degradation.

Objective

เนื่องจาก อะฟลาท็อกซินเป็นสารพิษที่ผลิตจากเชื้อราที่สร้างสารพิษในภาวะที่อาหารมีความชื้นสูง สามารถพบได้ทั่วไปในอาหารและผลผลิตทางการเกษตร ได้แก่ ข้าวโพด มันสำปะหลัง ผักและผลไม้อบแห้ง ธัญพืช หัวหอมแห้ง กระเทียมแห้ง เป็นต้นสารอะฟลาทอกซินมีหลายชนิด เช่น AFB1, AFB2, AFG1, AFG2 โดยเฉพาะ AFB1 ที่มีพิษสูงและสามารถทำลายตับ ทำให้เกิดอาการ อาเจียน ท้องเดิน และในระยะยาวอาจพัฒนาเป็น ตับแข็ง หรือ มะเร็งตับ ดังนั้นหากมีการปนเปื้อนของ AFB1 จากครัวเรือนลงสู่แหล่งน้ำที่มีสภาพแวดล้อมเอื้อต่อการสะสมของสารพิษ เช่น บ่อน้ำ หรือแหล่งน้ำธรรมชาติที่มีการไหลเวียนต่ำ อาจส่งผลกระทบต่อสิ่งแวดล้อมและระบบนิเวศได้ สารอะฟลาท็อกซินสามารถคงอยู่ในสิ่งแวดล้อมเป็นเวลานานและอาจถูกดูดซึมเข้าสู่ห่วงโซ่อาหารผ่านสัตว์น้ำและพืชน้ำ ซึ่งอาจส่งผลกระทบต่อสุขภาพของมนุษย์และสัตว์ที่บริโภคอาหารจากแหล่งน้ำดังกล่าว เพื่อลดความเสี่ยงจากการปนเปื้อนของ AFB1 ในแหล่งน้ำ จึงได้มีการสังเคราะห์วัสดุตัวเร่งปฏิกิริยาเชิงแสงที่ตกแต่งด้วยวัสดุนาโนโลหะ ที่สามารถสลาย AFB1 ในน้ำเสียครัวเรือน สามารถช่วยลดปัญหาการปนเปื้อนของสารพิษในแหล่งน้ำและป้องกันผลกระทบต่อสุขภาพของมนุษย์และสิ่งแวดล้อมได้อย่างมีประสิทธิภาพ

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