APPLICATION OF REED (Phragmites australis) IN TREATING HEAVY METAL CONTAMINATED SOIL IN TU LE LEAD-ZINC MINE, VAN CHAN DISTRICT, YEN BAI PROVINCE, VIETNAM

Environmental Science

This study evaluated the effectiveness of reed (Phragmites australis) in treating soil contaminated with heavy metals (HV) at the Tu Le lead-zinc mine waste dump, Van Chan district, Yen Bai province. The field experiment was carried out for 8 months with a randomized block design, to monitor the growth, HV accumulation and pollution treatment efficiency of reed. The results showed that reed had the ability to grow stably on heavily polluted soil, with a height of 145.33 cm and a root length of 57.43 cm. Analysis of plant samples showed that the plant accumulated HV mainly in the roots, especially for Pb, Cd and As. After 8 months, the HV treatment efficiency in the soil reached high levels: Zn (66.5%), Pb (73.95%), Cd (66.71%) and As (73.43%). In addition, there is a positive correlation between the concentration of HV in the soil and the accumulation in the plant (R² reaches 0.81 - 0.95 in the roots and R² reaches 0.55 - 0.76 in the stems and leaves). The results show that reed is a potential plant species in the treatment of HV-contaminated soil in mining areas, which can be applied in sustainable soil improvement and environmental restoration programs in the mountainous areas of Northern Vietnam.

This work is licensed under a Creative Commons Attribution-ShareAlike 4.0 International License.