Browsing by Author "Chee Kong Yap"
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Item Restricted Bioaccumulation of zinc in edible tropical vegetables in Peninsular Malaysia and its human health risk assessment based on various ethnicities in Malaysia(Springer, 2021) Koe Wei Wong; Chee Kong Yap; Aziran Yaacob; Rosimah Nulit; Hishamuddin Omar; Ahmad Zaharin Aris; Moslem Sharifinia; Alireza Riyahi Bakhtiari; Salman Abdo Al-Shami; Muhammad Saleem; Hideo OkamuraAlong with the growing utilization of zinc (Zn) and Zn-containing nanoparticles in various industries, Zn ecotoxicological evaluation on human food supply is necessary even though Zn is generally considered safe and rarely concentrated ecotoxicologically. This study aimed to investigate the bioaccumulation of Zn in 18 species of vegetables (seven leafy, nine fruity vegetables and one species each of tuber and legume) collected from two farming sites in the west coast of Peninsular Malaysia. A human health risk assessment (HHRA) was also conducted.Item Restricted Effects of metal-contaminated soils on the accumulation of heavy metals in gotu kola (Centella asiatica) and the potential health risks: a study in Peninsular Malaysia(Springer, 2016) Ghim Hock Ong; Ling Shing Wong; Ai Li Tan; Chee Kong YapCentella asiatica is a commonly used medicinal plant in Malaysia. As heavy metal accumulation in medicinal plants which are highly consumed by human is a serious issue, thus the assessment of heavy metals in C. asiatica is important for the safety of consumers. In this study, the heavy metal accumulation in C. asiatica and the potential health risks were investigated. Samples of C. asiatica and surface soils were collected from nine different sites around Peninsular Malaysia.Item Restricted Interspecific Variation of Heavy Metal Concentrations in the Different Parts of Tropical Intertidal Bivalves(Springer, 2009) Franklin Berandah Edward; Chee Kong Yap; Ahmad Ismail; Soon Guan TanThe heavy metals in the total tissues and the different soft tissues of the bivalves were compared with the maximum permissible limits set by five different countries. From the comparison, it was found that most of the bivalves contained metal concentrations which were below the maximum permissible limits and should pose no toxicological risk to consumers.Item Restricted Potential human health risks from toxic metals via mangrove snail consumption and their ecological risk assessments in the habitat sediment from Peninsular Malaysia(Elsevier, 2015) Wan Hee Cheng; Chee Kong YapSamples of mangrove snails Nerita lineata and surface sediments were collected from nine geographical sampling sites in Peninsular Malaysia to determine the concentrations of eight metals. To determine the ecological risks on the surface habitat sediments, sediment quality guidelines (SQGs), the geochemical indices, and potential ecological risk index (PERI) were used.