Mercury accumulation in Ipomoea aquatica (forsk) near a caustic soda factory in Thailand

Suckcharoen, Saroj

doi:10.1007/bf00250010

Cited by 10 publications

(8 citation statements)

References 3 publications

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“…In those investigations, Pb concentrations in shoots varied from 1,600 to 51,000, total Hg concentrations varied from 10 to 950, and Cd concentrations varied from 50 to 4,200 μg/kg dry weight. Compared to the present study of metals in I. aquatica , Pb concentrations reported elsewhere are about 10 to 100 times higher [10,28–33], total Hg concentrations are in the same range [26–28,32,34] and Cd concentrations vary from the same range to about 100 times higher in other studies [10,28–30,32].…”

Section: Resultscontrasting

confidence: 83%

“…Samples of stems and leaves were separated and analyzed for total Hg. The concentrations were then extremely high at this site, averaging 1,440 and 422 g/kg dry weight in leaves and stems, respectively (Table 6), and on the same order of magnitude as has been seen in I. aquatica near a caustic soda factory [27]. In the latter study, Hg concentrations were on average 950 and 430 g/kg dry weight in leaves and stems, respectively.…”

Section: Resultsmentioning

confidence: 99%

“…Concentrations of Hg, Cd, and Pb in aquatic vascular plants collected in other tropical freshwater ecosystems have been reported [10,[27][28][29][30][31][32][33][34]. In those investigations, Pb concentrations in shoots varied from 1,600 to 51,000, total Hg concentrations varied from 10 to 950, and Cd concentrations varied from 50 to 4,200 g/kg dry weight.…”

Section: Resultsmentioning

confidence: 99%

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Accumulation of heavy metals in water spinach (Ipomoea aquatica) cultivated in the Bangkok region, Thailand

Göthberg

Greger

Bengtsson

2002

Enviro Toxic and Chemistry

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The aquatic plant water spinach (Ipomoea aquatica), either wild or cultivated, is found throughout Southeast Asia and is a widely consumed vegetable in the region. Many of the waters where I. aquatica grows serve as recipients for domestic and other types of wastewater. Because these waters contain not only nutrients, but often also a wide variety of pollutants such as heavy metals from various human activities, many people risk intoxication. To estimate the accumulation of lead (Pb), cadmium (Cd), total mercury (total Hg), and methylmercury in I. aquatica and the potential hazard to human health via consumption, nine sites for cultivation of I. aquatica in the greater Bangkok region of Thailand were sampled. At seven of the sites, I. aquatica was cultivated for the local food market. The concentrations of methylmercury, total Hg, Pb, and Cd in I. aquatica were 0.8 to 221, 12 to 2,590, 40 to 530, and < or = 10 to 123 microg/kg dry weight, respectively. At all sites at least one element showed relatively high concentrations and no reference site could be established. From threshold values for highest tolerable intake of these metals by humans and information about consumption of I. aquatica among local people, Pb and Cd concentrations in I. aquatica do not seem to be a direct threat to human health. However, concentrations of Hg were very high at some sites, and were higher in leaves (highest mean value: 1,440 microg/kg dry wt) than in stems (highest mean value: 422 microg/kg dry wt). This might be a threat, especially to children and fetuses, because Hg in I. aquatica was composed of methylmercury, partly or totally, at most sites to 11% or less and at one site from 50 to 100%. At the latter site, I. aquatica was not cultivated for the food market. Because other food sources, such as fish, may have high concentrations of methylmercury, these results indicate a need for monitoring of Hg, especially methylmercury, in different foodstuffs in the region.

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Section: Resultscontrasting

confidence: 83%

Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

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Accumulation of heavy metals in water spinach (Ipomoea aquatica) cultivated in the Bangkok region, Thailand

Göthberg

Greger

Bengtsson

2002

Enviro Toxic and Chemistry

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“…In the results reported here, leaves accumulated more Hg than roots in plants cultured with no Hg. Uptake of Hg from the air via the stomata of untreated plants is a possible reason for the relatively high Hg concentrations in these plants in comparison to plants growing in a medium without Hg (Suckcharoen, 1978;Gö thberg et al, 2002). Uptake of gaseous Hg via the stomata has been shown in laboratory studies (Browne and Fang, 1978;Du and Fang, 1983;Cavallini et al, 1999).…”

Section: Hg Accumulationmentioning

confidence: 99%

Detection and Quantification of Unbound Phytochelatin 2 in Plant Extracts of Brassica napus Grown with Different Levels of Mercury

et al. 2006

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The mercury (Hg) accumulation mechanism was studied in rape (Brassica napus) plants grown under a Hg concentration gradient (0 mM-1,000 mM). Hg mainly accumulated in roots. Therefore, the presence of phytochelatins (PCs) was studied in the roots of the plants. The high stability of the PC-Hg multicomplexes (mPC-nHg) seems to be the main reason for the lack of previous Hg-PC characterization studies. We propose a modification of the method to detect and quantify unbound PC of Hg in plant extracts via high-performance liquid chromatography coupled to electrospray tandem mass spectrometry and inductively coupled plasma mass spectrometry in parallel. We separated the PC from the Hg by adding the chelating agent sodium 2,3-dimercaptopropanesulfonate monohydrate. We only detected the presence of PC after the addition of the chelating agent. Some multicomplexes mPC-nHg could be formed but, due to their large sizes, could not be detected. In this study, only PC 2 was observed in plant samples. Hg accumulation was correlated with PC 2 concentration (r 2 5 0.98).

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“…Bed sediments are known to be the sources for most of the Hg found in the aquatic biota and the Hg is also transferred to fish after formation of methyl-mercury proteinate at a suitably low pH (Tsai et aL, 1975;Kudo, 1976;Miller and Akagi, 1979;Akagi et al, 1979). The high Hg contents of the muds in the TACSCO area are positively related to the elevated Hg levels found in fish, aquatic plants and freshwater shrimps Suckcharoen, , 1979a.…”

Section: Bottom Mudmentioning

confidence: 97%

Reduction of mercury pollution in the vicinity of a caustic soda plant in Thailand

Suckcharoen

Lodenius

1980

Water Air Soil Pollut

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Abstract. Fish samples collected near the caustic soda factory of TACSCO in Thailand during November and December 1978 were found to contain 0.10 to 1.38 ppm Hg in flesh (on wet weight basis), whereas those of the control areas contained 0.0l to 0.30 ppm. The Hg content of the fish in the TACSCO area had decreased by more than half from the first investigation which took place during 1975-76. This decrease is obviously a result of the functioning of the waste-water-treatment system built by the factory in 1974. The bottom mud collected near the factory in 1978 contained 8.39 to 57.95 ppm Hg (on dry weight basis) as compared with the mean of 0.03 ppm in samples taken from the control area. The Hg content in fish-eating birds were low, 0,04 to 0.44 ppm in the muscles and 0,05 to 1.32 ppm in the livers (on wet weight basis).

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Mercury accumulation in Ipomoea aquatica (forsk) near a caustic soda factory in Thailand

Cited by 10 publications

References 3 publications

Accumulation of heavy metals in water spinach (Ipomoea aquatica) cultivated in the Bangkok region, Thailand

Accumulation of heavy metals in water spinach (Ipomoea aquatica) cultivated in the Bangkok region, Thailand

Detection and Quantification of Unbound Phytochelatin 2 in Plant Extracts of Brassica napus Grown with Different Levels of Mercury

Reduction of mercury pollution in the vicinity of a caustic soda plant in Thailand

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