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Your search keyword '"Hashim, Rohasliney"' showing total 3 results
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3 results on '"Hashim, Rohasliney"'

1. Preliminary Evaluation of Heavy Metal Contamination and Source Identification in Kuala Lumpur SMART Stormwater Pond Sediments Using Pb Isotopic Signature

Author

Muhamad Shirwan Abdullah Sani, Aziz Arshad, Zufarzaana Zulkeflee, Ferdaus Mohamat-Yusuff, Nabeel Abdullah Alrabie, Hashim Rohasliney, Mohammad Noor Azmai Amal, Anugrah Ricky Wijaya, Syaizwan Zahmir Zulkifli, and Najat Masood

Subjects
Pollutant, SMART stormwater ponds, Environmental effects of industries and plants, Renewable Energy, Sustainability and the Environment, Geography, Planning and Development, Stormwater, Coal combustion products, Sediment, TJ807-830, contamination indices, Management, Monitoring, Policy and Law, Contamination, heavy metals contamination, TD194-195, Renewable energy sources, Environmental sciences, Isotopic signature, tracing contamination sources, Environmental chemistry, Environmental science, Pb isotope ratios, GE1-350, Surface runoff, Oil shale
Abstract

Uncontrolled urbanization and growing industrialization are major sources of pollutants that affect the urban stormwater quality and, therefore, the receiving aquatic environment. The concentrations of heavy metals (As, Cd, Cr, Cu, Fe, Ni, Pb, and Zn), and Pb isotope ratios in surface sediment samples obtained from SMART holding and storage ponds located in Kuala Lumpur were investigated using inductively coupled plasma-mass spectrometry (ICP-MS). The highest metal concentrations were found at the SMART holding pond (SHP), the first recipient of urban stormwater runoff from the SMART system catchment area. As, Cd, Pb, and Zn are the dominant metal contaminants in the sediments of both SMART ponds, with values exceeding the average shale values. According to contamination indices applied to evaluate the environmental risk caused by heavy metals, As had the highest values among the metals examined, denoting moderate contamination. Hence, it can frequently cause harmful effects on the sediment-living species. The Pb isotope ratios (206Pb/207Pb and 208Pb/207Pb) indicated that coal combustion was the foremost source of anthropogenic Pb in the sediments of both SMART ponds. The control of coal combustion and sites undergoing intensive human activities should be given priority in the foreseeable future.

Published
2021

2. Investigating geochemical factors affecting heavy metal bioaccessibility in surface sediment from Bernam River, Malaysia.

Author

Kadhum, Safaa, Ishak, Mohd, Zulkifli, Syaizwan, and Hashim, Rohasliney

Subjects
SEDIMENTS, BIOAVAILABILITY, CADMIUM, MERCURY (Element), MULTIPLE correspondence analysis (Statistics)
Abstract

The present study applied the use of sequential extraction technique and simple bioaccessibility extraction test to investigate the bioavailable fractions and the human bioaccessible concentration of metals collected from nine stations in surface sediment of the Bernam River. The concentrations of total and bioaccessible metals from different stations were in the range of 0.30-1.43 μg g and 0.04-0.14 μg g for total cadmium and bioaccessibility of cadmium, respectively, 6.20-288 μg kg and 2.06-8.53 μg kg for total mercury and bioaccessibility of mercury, respectively, and 9.2-106.59 μg g and 0.4-2.75 μg kg for total tin and bioaccessibility of tin, respectively. The chemical speciation of Cd in most sampling stations was in the order of oxidisable-organic > acid-reducible > residual > exchangeable, while the chemical speciation of Hg was in the order of exchangeable > residual > oxidisable-organic > acid-reducible and the chemical speciation of Hg was in the order of residual > oxidisable-organic > acid-reducible > exchangeable. The principal component analysis showed that the main factors influencing the bioaccessibility of mercury in surface sediments were the sediment total organic matter, cation exchange capacity, and easily, freely, or leachable and exchangeable fraction, and the factors influencing the bioaccessibility of tin were the total tin and cation exchange capacity, while the bioaccessibility of Cd in surface sediments was influenced by the only factor which is the easily, freely, or leachable and exchangeable fraction. [ABSTRACT FROM AUTHOR]

Published
2017
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3. Evaluation of the status and distributions of heavy metal pollution in surface sediments of the Langat River Basin in Selangor Malaysia.

Author

Kadhum, Safaa A., Ishak, Mohd Yusoff, Zulkifli, Syaizwan Zahmir, and Hashim, Rohasliney binti

Subjects
RIVER sediments, HEAVY metal toxicology, GEOLOGICAL basins, OCEAN temperature, RIVER pollution
Abstract

The concentration of four metals: Cd, Ni, Cr, and Sn, in the surface sediment samples from the Langat River were evaluated. Multivariate techniques were used to apportion the sources of the metals. The results showed that the highest concentration of metals in the Langat River were found at Jenjarom station, with the concentration of these metals decreasing in the order of Sn > Cr > Ni > Cd (114.27, 21.03, 7.84, 0.59 μg g − 1 dry weight). The level of pollution in the sediment was assessed using contamination factor (CF), pollution load index (PLI), geo-accumulation index (Igeo), and enrichment factor (EF). The results of the pollution assessment showed that the Langat River sediments have severe enrichment of Sn and moderate to severe enrichment of Cd. The results of the PLI for the Langat River suggest that the sampling stations are not polluted with the exception of the Jugra, Jenjarom, and Jalan Hulu Langat stations. [ABSTRACT FROM AUTHOR]

Published
2015
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