scholarly journals Seasonal Variation of Heavy Metals in the Intertidal Gastropod Trochus radiatus of Gulf of Mannar

2021 ◽  
Vol 11 (02) ◽  
pp. 92-102
Author(s):  
Theivasigamani Mohanraj ◽  
Maxwalt Sheeba ◽  
Siluvai Regi Thomas Sherly Cross ◽  
Thangaraj Jebarani Rajathy
Keyword(s):  
Heavy Metals ◽  
Seasonal Variation ◽  
Gulf Of Mannar ◽  
Intertidal Gastropod

scholarly journals Seasonal Variation And Preliminary Risk Assessment Of Trace Element Pollution In Surface Water From Langat River, Malaysia

2019 ◽  
Author(s):  
Lubna Alam ◽  
Md. Mahmudul Alam ◽  
Mazlin Bin Mokhtar ◽  
Azizul Bar ◽  
Nicholas Kathijotes ◽  
...  
Keyword(s):  
Heavy Metals ◽  
Seasonal Variation ◽  
River Water ◽  
Critical Index ◽  
Principal Component ◽  
Dermal Absorption ◽  
Potential Threat ◽  
Concentration Data ◽  
Trace Element Pollution ◽  
Langat River

Heavy metals are widely used in various industries and became a great concern all over the world due to environmental contamination. This study provides an assessment of seasonal variability and risks to human health associated with the exposure to heavy metals concentrated in Langat river water of Malaysia. The Department of Environment (DOE) Malaysia kindly provided the heavy metal concentration data in water for this study. Several multivariate estimation such as an independent t test, box-and-whisker plot and Principal component analysis were carried out to evaluate the seasonal variation of metals concentration in water. The average value of ten analyzed metals was 250.81 µg/l and followed in order of abundance by August > Jun > February > October > April > December > March > May > September > January > July > November. The calculated HPI was 123.42, which is far above the critical index value of 100, indicating pollution with respect to heavy metals. Estimates of health risks associated with river water were summarized according to non-carcinogenic and carcinogenic health effects. No potential threat was detected for noncarcinogenic risk as the HI values calculated were <1. Potential carcinogenic risks associated with the ingestion and dermal absorption of heavy metals in water were evaluated probabilistically by performing 10,000 trails for Monte Carlo simulation where potential carcinogenic risk exists in case of Cd and As.It is necessary to take proper steps to reduce the pollution of heavy metals in Langat River.

scholarly journals Seasonal variation of heavy metals and metallothionein contents in Asian swamp eels, Monopterus albus (Zuiew, 1793) from Tumpat, Kelantan, Malaysia

2019 ◽  
Vol 20 (1) ◽  
Author(s):  
Ai Yin Sow ◽  
Ahmad Ismail ◽  
Syaizwan Zahmir Zulkifli ◽  
Mohammad Noor Amal ◽  
Kamarul Hambali
Keyword(s):  
Heavy Metals ◽  
Seasonal Variation ◽  
Monopterus Albus

Study of Absorption of Heavy Metals (Pb,Cu) in Phragmites australis in Lingang New City

2014 ◽  
Vol 692 ◽  
pp. 3-7 ◽  
Author(s):  
Min Jiao ◽  
Xiang Li ◽  
Jing Yu Liu ◽  
Yong Qiang Tian ◽  
Yu Huang ◽  
...  
Keyword(s):  
Heavy Metals ◽  
Seasonal Variation ◽  
Phragmites Australis ◽  
Stems And Leaves ◽  
New City

Analysis on the concentrations of Pb, Cu in the roots, stems, leaves of phragmites australis which grows on Lingang New City of Shanghai showed that both of Pb, Cu in roots were higher concentrations than that in stems and leaves; the absorption of Pb,Cu had obvious seasonal variation; in winter, the enrichment of Pb, Cu in phranmites autralis was occurred and the enrichment ability of Pb was higher than Cu,

scholarly journals SEASONAL VARIATION OF HEAVY METALS CONCENTRATIONS IN FISH IN OGUTA LAKE, NIGERIA

2014 ◽  
Vol 10 (7) ◽  
pp. 2929-2936
Author(s):  
C.I.A Nwoko ◽  
L.N. Ukiwe ◽  
U. U Egereonu
Keyword(s):  
Heavy Metals ◽  
Organic Matter ◽  
Seasonal Variation ◽  
Fish Species ◽  
Rainy Season ◽  
Atomic Absorption Spectrophotometry ◽  
World Health ◽  
Absorption Spectrophotometry ◽  
Health Organization ◽  
High Level

Concentrations of heavy metals iron (Fe), copper (Cu), lead (Pb), nickel (Ni), mercury (Hg), chromium (Cr), cadmium (Cd) and arsenic (As), were determined in the head of four fish species, namely, Trachinotus goreensis, Clarias anguillaris, Synodontis membranaceous, and Tilapia zilli, in Oguta Lake, Nigeria. Result obtained from analyses using Atomic Absorption Spectrophotometry (AAS) revealed that Fe (13.309 mg/l) was the highest metal accumulated by the fish (S. membranaceous) in October, while Hg and As were not detected in all the fish species except in July where 0.003 and 0.005mg/l of As were detected in the fish species (T. zilli and C. anguillaris), and November where 0.001 mg/l of As was also detected in S. membranaceous. The distribution of HMs in the fish species revealed that, overall, Fe was the highest metal accumulated by the fish species, C. membranaceous, followed by T. goreensis. This high level of Fe accumulated by the fish species may be attributed to the fact that Fe occur at high levels in organic matter at the bottom of the Lake. So being typical bottom dwellers, the fish species were more exposed to the metal. Heavy metals were higher (not significantly) during the dry season than the rainy season. Statistically, however, seasonal variation didn’t significantly influence the accumulation of HMs by the fish species. The levels of heavy metals examined in the present study were below maximum permissible limits set by World Health Organization (WHO), indicating that the Oguta Lake is not polluted by heavy metals.

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