ĐÁNH GIÁ MỨC ĐỘ TÍCH LŨY KIM LOẠI NẶNG TRONG LOÀI TRÙNG TRỤC (Lanceolaria sp) VÀ TRẦM TÍCH SÔNG CÂU ĐOẠN CHẢY QUA TỈNH HẢI DƯƠNG

Tóm tắt

To assess the accumulation of some heavy metals in sediment and axillary species Lanceolaria sp. The
samplesn collected in 5 sites along Cau River in Hai Duong province from May to December 2018
were analysed for the concentration of Cu, Pb, Zn, Cd and Cr in sediment and Lanceolaria sp. The
results showed the concentration of heavy metals in dried sediment samples, Cu: 17,333 - 66,601
mg/kg; Pb: 21,208 - 196,470 mg/kg; Zn: 40,876 - 365,777 mg/kg; Cr: 29,357 - 120,046 mg/kg. The
concentration of heavy metals in most sampling sites were in the TEC - PEC range as compared to US
- EPA standards. The metal concentration in Lanceolaria sp. ranges from 7,408 - 37,492 mg/kg dried
weight, equivalent to 0.917 - 5,021 mg/kg fresh weight. The biota-sediment accumulation factor (BSAF)
in sediments decreases from: Cd > Cu > Zn > Pb > Cr. In which, Cd accumulation in Lanceolaria sp.
collected along Cau River in Hai Duong province was relatively high (BSAF of only Cd was greater
than 1). The results initially indicated that Lanceolaria sp. can be selected as an indicator organism to
monitor heavy metal pollution in the river sediments.
Keywords: Heavy metals, Lanceolaria sp., sediment, Cau River, Hai Duong