Ecological risks of heavy metals/metalloid discharged from two sewage treatment works to Mai Po Ramsar site, South China

Man，Yu Bon1; Lei，Kim Man1; Chow，Ka Lai2; Leung，Anna Oi Wah3; Mo，Wing Yin4; Wong，Ming Hung1,5

2020-06-01

10.1007/s10661-020-08397-w

ENVIRONMENTAL MONITORING AND ASSESSMENT   影响因子和分区

0167-6369

1573-2959

The concentrations of six heavy metal/metalloids (HMs) cadmium (Cd), copper (Cu), mercury (Hg), lead (Pb), zinc (Zn), and arsenic (As) were determined in the influent, effluent, and dewatered sludge of two sewage treatment works (Yuen Long Sewage Treatment Work (YLSTW) and Shek Wu Hui Sewage Treatment Work (SWHSTW)) and river waters and sediment (Shan Pui River and Ng Tung River) within the Mai Po Ramsar site in Hong Kong SAR, China. In both STWs, Pb had the highest removal efficiencies (YLSTW 86.5 ± 19.0% to 97.3 ± 3.04%; SWHSTW 87.4 ± 12.8% to 100 ± 0.0800%). In the whole effluent toxicity test, both STWs were effective in lowering the toxicity of the effluent to zebrafish and cherry shrimp. The environmental risk assessments of these HMs on three local aquatic organisms, three species of fish, two species of crustaceans, and three species of algae, were calculated based on measured HMs concentrations in river water and sewage samples, and the predicted no-effect concentrations. Results showed that Zn concentrations in all collected samples posed potential risks to all studied aquatic organisms (average risk quotient = 445). The concentrations of Cu in the rivers posed potential risks (average risk quotient = 5.42) to all fish species. It was concluded that Zn and Hg derived from the STWs might pose potential risks to the living organisms inhabiting the Ramsar site, and Cu, Cd, Pb, and As in the rivers were originated from the two rivers and possibly other tributaries.

Environmental risk assessment Removal efficiency Secondary treatment Water quality parameters Whole effluent toxicity test

EI

英语

通讯

20202708885089

Efficiency ; River pollution ; Toxicity ; Effluents ; Water quality ; Risk assessment ; Heavy metals ; Water treatment ; Fish ; Effluent treatment

Water Treatment Techniques:445.1 ; Water Analysis:445.2 ; Industrial Wastes:452.3 ; Industrial Wastes Treatment and Disposal:452.4 ; Water Pollution:453 ; Health Care:461.7 ; Metallurgy and Metallography:531 ; Production Engineering:913.1 ; Accidents and Accident Prevention:914.1

ENVIRONMENT/ECOLOGY

2-s2.0-85086995725

Scopus

1.Consortium on Health,Environment,Education and Research (CHEER),and Department of Science and Environmental Studies,The Education University of Hong Kong,Tai Po,Hong Kong
2.Department of Geography,Hong Kong Baptist University,Kowloon Tong,Hong Kong
3.Croucher Institute for Environmental Sciences,and Department of Biology,Hong Kong Baptist University,Kowloon Tong,Hong Kong
4.Department of Science,School of Science and Technology,The Open University of Hong Kong,Hong Kong
5.Guangdong Provincial Key Laboratory of Soil and Groundwater Pollution Control,and State Environmental Protection Key Laboratory of Integrated Water-Groundwater Pollution Control,Southern University of Science and Technology,Shenzhen,518055,China

Man，Yu Bon,Lei，Kim Man,Chow，Ka Lai,et al. Ecological risks of heavy metals/metalloid discharged from two sewage treatment works to Mai Po Ramsar site, South China[J]. ENVIRONMENTAL MONITORING AND ASSESSMENT,2020,192(7).

Man，Yu Bon,Lei，Kim Man,Chow，Ka Lai,Leung，Anna Oi Wah,Mo，Wing Yin,&Wong，Ming Hung.(2020).Ecological risks of heavy metals/metalloid discharged from two sewage treatment works to Mai Po Ramsar site, South China.ENVIRONMENTAL MONITORING AND ASSESSMENT,192(7).

Man，Yu Bon,et al."Ecological risks of heavy metals/metalloid discharged from two sewage treatment works to Mai Po Ramsar site, South China".ENVIRONMENTAL MONITORING AND ASSESSMENT 192.7(2020).