A Preliminary Study on the Presence of-Heavy Metals in Aquatic Plants From a Freshwater Wetland at Kelaniya

Nirbadha, K.G.S.; Liyanage, J.A.; Amarasinghe, M. D.

doi:10.31357/fesympo.v0i0.1534

Cited by 2 publications

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“…Likewise Hg in sediment, at an average of 0.129 mg/kg, is less prominent than the level reported in two hydroelectric reservoirs in Quebec, Canada (0.15–0.49 mg/kg) [ 40 ]. Tin is found in elevated concentration in macroalgae and aquatic plants; according to Thompson et al [ 41 ], the bioaccumulation factor of Sn in these samples can be as high as 100 where Nirbadha et al [ 42 ] likewise revealed relatively large quantities of Sn in three aquatic plants in Kelaniya.…”

Section: Resultsmentioning

confidence: 99%

Distribution of Major and Trace Elements in a Tropical Hydroelectric Reservoir in Sarawak, Malaysia

Sim

Ling

Lee

et al. 2014

International Scholarly Research Notices

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This paper reports the metals content in water, sediment, macroalgae, aquatic plant, and fish of Batang Ai Hydroelectric Reservoir in Sarawak, Malaysia. The samples were acid digested and subjected to atomic absorption spectrometry analysis for Na, K, Mn, Cr, Ni, Zn, Mg, Fe, Sn, Al, Ca, As, Se, and Hg. The total Hg content was analysed on the mercury analyser. Results showed that metals in water, sediment, macroalgae, aquatic plant, and fish are distinguishable, with sediment and biota samples more susceptible to metal accumulation. The distributions of heavy metals in water specifically Se, Sn, and As could have associated with the input of fish feed, boating, and construction activities. The accumulation of heavy metals in sediment, macroalgae, and aquatic plant on the other hand might be largely influenced by the redox conditions in the aquatic environment. According to the contamination factor and the geoaccumulation index, sediment in Batang Ai Reservoir possesses low risk of contamination. The average metal contents in sediment and river water are consistently lower than the literature values reported and well below the limit of various guidelines. For fishes, trace element Hg was detected; however, the concentration was below the permissible level suggested by the Food and Agriculture Organization.

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Section: Resultsmentioning

confidence: 99%

Distribution of Major and Trace Elements in a Tropical Hydroelectric Reservoir in Sarawak, Malaysia

Sim

Ling

Lee

et al. 2014

International Scholarly Research Notices

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“…Nirbadha et al . () also revealed that relatively large quantities of Sn were found in all three species. The highest Cr content was observed in L .…”

Section: Discussionmentioning

confidence: 76%

“…Their results showed that the heavy metals concentrations in the roots were generally higher than in the shoots. Nirbadha et al (2003) also revealed that relatively large quantities of Sn were found in all three species. The highest Cr content was observed in L. flava.…”

Section: Discussionmentioning

confidence: 83%

“…Nirbadha et al . () measured heavy metals absorption in three plant species found in the wetland: (i) Pistia stratiotes , (ii) Limnocharis flava and (iii) Ipomoea aquatica . Their results showed that the heavy metals concentrations in the roots were generally higher than in the shoots.…”

Section: Discussionmentioning

confidence: 99%

“…The canal that enters this wetland from inlet 2 collects sewage from Iriyawetiya village, a populous area in the periphery of the wetland, and discharges them into the wetland. Nirbadha et al (2003) measured heavy metals absorption in three plant species found in the wetland: (i) Pistia stratiotes, (ii) Limnocharis flava and (iii) Ipomoea aquatica. Their results showed that the heavy metals concentrations in the roots were generally higher than in the shoots.…”

Section: Discussionmentioning

confidence: 99%

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Salient ecological functions of a tropical freshwater wetland

2013

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An ecological survey was carried out for the Iriyawetiya freshwater wetland in Sri Lanka. The goal was to characterize this unique wetland, about which little ecological information was available. The areal extent of the wetland was 87 ha, with a marshy cover of approximately 52 ha. Water samples to assess physico‐chemical parameters were collected at monthly intervals for six months from four study sites along the stream length through the wetland. A 1 m × 0.5 m quadrat was used for vegetation sampling at 5 m intervals along a 50‐m transect, aligned perpendicular to a reference shore line. Constituent plant species of each quadrat, both floating and attached, were identified and enumerated. Multivariate analysis using PC‐ORD4 software (MJM software, Gleneden Beach, Oregon, USA) was performed to identify plant associations. Four distinguishable clusters of plant associations were identified using a TWINSPAN analysis; namely (i) bank side floral community, (ii) dense marginal stand, (iii) graminoid and (iv) reed cyperous communities. The water in bank side floral association had a high biological oxygen demand (BOD). The reed plant community was confined to stream outlet and exhibited high dissolved oxygen (DO) levels. The two stream inlets displayed high nitrate concentrations, whereas the outlet and mid‐wetland sampling sites exhibited low nitrate levels. In this study, the DO concentrations increased downstream, while the phosphate, nitrate and BOD concentrations, and turbidity gradually declined towards the outlet, indicating the purifying effect of the wetland. In this preliminary analysis, it was ascertained that the proximity of this wetland to an urban area is propitious, as the wetland could be ecologically engineered to provide water that would need less treatment.

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A Preliminary Study on the Presence of-Heavy Metals in Aquatic Plants From a Freshwater Wetland at Kelaniya

Cited by 2 publications

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Distribution of Major and Trace Elements in a Tropical Hydroelectric Reservoir in Sarawak, Malaysia

Distribution of Major and Trace Elements in a Tropical Hydroelectric Reservoir in Sarawak, Malaysia

Salient ecological functions of a tropical freshwater wetland

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