NGHIÊN CỨU CÁC HỢP CHẤT DIOXIN TRONG MẪU TRO THU THẬP TẠI LÀNG TÁI CHẾ NHÔM MẪN XÁ, TỈNH BẮC NINH

Tóm tắt

The study investigated to determine several dioxin compounds in the ash samples collected at Man Xa
aluminum recycling village (Van Mon commune, Yen Phong district, Bac Ninh province). Dioxin compounds
were extracted by Thermo ASE 350 Solvent Accelerator (Thermo, USA) and analysed using HRGC/HRMS
gas chromatography equipment (Thermo Trace 1310, Thermo, USA) coupled with DFS high resolution mass
spectrometry system. Results, the average concentrations of dioxin/furan compounds in fly ash and bottom
ash samples were 16.9-979 (ng/kg d.w) and 0.422-10.2 (ng/kg d.w), respectively. The total equivalent toxic
concentrations of dioxin/furan compounds in fly ash samples ranged from 284 to 423 ng TEQ/kg d.w, while
those in bottom ash samples were from 3.17 to 7.93 ng TEQ/kg d.w. Interestingly, these values are within the
permissible limits according to the national technical regulation on hazardous waste thresholds (QCVN
07:2009/BTNMT). However, the exploitation and use of fly ash and bottom ash for different purposes, that
can cause environmental pollution and pose potential risks to human health if not controlled and managed
appropriately. Therefore, it is necessary to expand research to minimize the impacts of dioxin/furan
compounds present in fly ash and bottom ash on the environment and human life, gradually helping
authorities have the basis to issue sanctions to better monitor and manage the activities of metal recycling
villages in general and Man Xa aluminum recycling village in particular.