Project's information
Project's title | Studying the status and changing of environmental pollution and proposal solutions to control and reduce the impacts on coastal ecosystems of the Mong Cai coastal area |
Project’s code | VAST06.04/20-21 |
Research hosting institution | Institute of Marine Environment and Resources |
Project leader’s name | Dr. Dang Hoai Nhon |
Project duration | 01/01/2020 - 31/12/2021 |
Project’s budget | 600 million VND |
Classify | Fair |
Goal and objectives of the project | - Assessment of the status pollution of sediment, water in the Mong Cai coastal area and the changing pollutants by human impacts during the past century. |
Main results | Theoretical results: The project has evaluated the characteristics of water and sediments on the Mong Cai coast. Water quality through parameters of pH, DO, TSS and salinity and heavy metals in the water were lower than Vietnam Standard QCVN 10-TM:2015/BTNMT. The Mong Cai coast distributes mainly coarse sediments (sand), the fine sediments (silt) are distributed less common. The mineral compositions were range from hight to low contents: quartz > illite > kaolinite > feldspar > chlorite > gothite > gibbsite. Most of the heavy metals in surface sediments were lower than the Vietnamese Standard QCVN 43:2017/BTNMT and the ISQGs in both the surface and cores sediment. In general, present heavy metal concentrations are lower than in the past, only average concentrations As was higher than the ISQG (7.2mg/kg) in 2 sediment cores. The OCPs content is quite high, higher than Vietnamese Standard QCVN 43:2017/BTNMT with BHCs (lindan), DDTs (p,o' DDD; p,p' DDT; p,p' DDE; p,o' DDE) and the highest was dieldrin, the risk quotient (RQ) of these OCPs were quite high, the highest up to 171.3 of dieldrin. The PAHs contents were low, but they were increasing over time from 2008 in the C1 sediment core and from 1944 in the C2 sediment core. |
Novelty and actuality and scientific meaningfulness of the results | Project results contributed information about sediment characteristics, sedimentation rate, distribution of heavy metals, OCPs, and PAHs on the border between Vietnam and China. The existence of high concentrations of OCPs in the past and a reduction in the current period shows that humans used a lot of pesticides on the mainland and it was brought to the coastal areas. OCPs in sediment decrease over time because both Vietnam and China have been parties to the Stockholm Convention since 2001 and which has been in effect since 2004 in both countries. |
Products of the project | - Scientific papers in referred journals (list): |
Research area | The result can be transferred to the Department of Natural Resources and Environment of Mong Cai City or the Department of Science and Technology, Department of Natural Resources and Environment of Quang Ninh province as a scientific basis for environmental management in the border area. |
Recommendations | In order to clarify the source of OCPs from Vietnam or cross-border sources, it is necessary to further carry out the analysis of the OCPs on agricultural lands, and river systems around the Mong Cai city. |
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