Concentrations of Persistent Organic Pollutants in Surface Sediments of the Mudflat and Mangroves at Mai Po Marshes Nature Reserve, Hong Kong

Zheng, Gene J.; Lam, Michael Hon-Wah; Lam, Paul K.S.; Richardson, Bruce J.; Man, Ben Kwok-Wai; Li, Ashley M.Y.

doi:10.1016/s0025-326x(00)00190-9

Cited by 74 publications

(27 citation statements)

References 10 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…With the exception of Shenzhen (6) the values reported in the current study fall at the lower end of TPH concentrations observed in mangrove sediments from China and are broadly comparable to those from Sheung Pak Nai Mangroves, Hong Kong but lower than Mai Po Mangroves, Hong Kong (Table 2) Zheng et al 2000).…”

supporting

confidence: 76%

“…The contamination of ten mangrove sites by PCBs in Hong Kong showed relatively low total concentrations ranging from 0.5-5.8 µg/kg with the exception of mangroves from Yi O, Tolo Pond and Lai Chi Wo which were identified as hot spots and gave PCB concentrations in the range of 11 to 25 µg/kg (Tam and Yao, 2002). Similar concentrations of PCBs (4.9 to 27.6 µg/kg) were reported from mangrove sediments at Mai Po marshes nature reserve in Hong Kong (Zheng et al 2000).…”

mentioning

confidence: 51%

“…However, the same study also reported TPH concentrations as high as 1000 µg/g in the root zones of mangrove sediments, suggesting that oil pollution from a single point source can lead to highly variable TPH values even in the same mangrove swamp. Sediment samples collected from mangrove forest and mudflats of Inner Deep Bay (Mai Po Wetlands) in Shenzhen in 1999 reported TPH concentrations ranging from 267 to 363 µg/g, confirming that concentrations were similar in both mangrove forest and mudflat sediment (Zheng et al 2000).…”

mentioning

confidence: 86%

“…Ho Chung: 189-329 µg/kg (Guo et al 2005) cf. 1273-11098 µg/kg (Tam et al 2001) and similarly for Mai Po: 212-1042 µg/kg (Zheng et al 2000) cf. 1007-4842 µg/kg .…”

mentioning

confidence: 95%

“…It might reasonably be expected that these would be comparable for either a weathered, or an unweathered, major petroleum contribution (Farias et al 2008;Wang et al 1999;Wang et al 2004). It is also pertinent to note that in a study of the Mai Po marshes nature reserve, the naphthalene content of the mangrove sediments was high in contrast to the mudflat samples where naphthalene was largely undetectable (Zheng et al 2000). This situation could conceivably arise from the much greater biological activity of the mangrove cf.…”

mentioning

confidence: 99%

See 4 more Smart Citations

Organic and metal contamination in surface mangrove sediments of South China

Vane

Harrison

Kim

et al. 2009

Marine Pollution Bulletin

129

View full text Add to dashboard Cite

supporting

confidence: 76%

mentioning

confidence: 51%

mentioning

confidence: 86%

“…Ho Chung: 189-329 µg/kg (Guo et al 2005) cf. 1273-11098 µg/kg (Tam et al 2001) and similarly for Mai Po: 212-1042 µg/kg (Zheng et al 2000) cf. 1007-4842 µg/kg .…”

mentioning

confidence: 95%

mentioning

confidence: 99%

See 3 more Smart Citations

Organic and metal contamination in surface mangrove sediments of South China

Vane

Harrison

Kim

et al. 2009

Marine Pollution Bulletin

129

View full text Add to dashboard Cite

Pollution Studies on Mangroves in Hong Kong and Mainland China

Tam

2006

The Environment in Asia Pacific Harbours

View full text Add to dashboard Cite

Organochlorine Insecticides in Mudflats of Hong Kong, China

Wong

Giesy

2005

Arch Environ Contam Toxicol

View full text Add to dashboard Cite

Organochlorine (OC) insecticides were measured in different environmental compartments (including seawater, sediment, and biota) at six sites within the Mai Po Marshes Nature Reserve (MPMNR) and at one site in A Chau (AC) in Hong Kong in June 2002 (wet season) and January 2003 (dry season). MPMNR is a Wetland of International Importance (Ramsar site) situated in the western part of Hong Kong, whereas AC is a relatively remote island in Starling Inlet on the eastern side of the New Territories of Hong Kong. Generally, concentrations of OC insecticides in water, sediment, and biota were greater at MPMNR than at AC. Hexachlorobenzene, dichloro-diphenyl-trichloroethane, and hexachlorocyclohexanes were detected in all samples collected from MPMNR. Preliminary risk assessments were performed by comparing the measured concentrations of OCs in different environmental compartments with the corresponding guidelines promulgated by various environmental protection authorities. Concentrations of some OCs in sediments from certain locations in MPMNR were consistently greater than their corresponding sediment guideline values. These results suggest that the sediment OC concentrations in the sediments of MPMNR might pose a risk to aquatic organisms. Despite this, concentrations of OCs in biota samples were much lower than the relevant guideline values promulgated by government agencies to protect the health of human consumers. It is postulated that the management practices adopted at MPMNR have been effective in limiting the bioaccumulation window (duration) for OCs. This situation may have been aided by a frequent exchange of water between the tidal shrimp ponds at MPMNR and the open sea, again attributable to management practices. The low-cost maintenance practices adopted at MPMNR may potentially be applicable to wetlands in other southeastern Asian countries, thus allowing sustainable fishery production and wildlife conservation.

show abstract

Concentrations of Persistent Organic Pollutants in Surface Sediments of the Mudflat and Mangroves at Mai Po Marshes Nature Reserve, Hong Kong

Cited by 74 publications

References 10 publications

Organic and metal contamination in surface mangrove sediments of South China

Organic and metal contamination in surface mangrove sediments of South China

Pollution Studies on Mangroves in Hong Kong and Mainland China

Organochlorine Insecticides in Mudflats of Hong Kong, China

Contact Info

Product

Resources

About