Rare earth elements (REEs) as pollution indicator in sediment of Linggi River, Malaysia

Elias, Suhaimi; Ibrahim, Shariff Che; Samuding, Kamarudin; Kantasamy, Nesamalar; Rahman, Shamsiah Abdul; Hashim, Azian

doi:10.1016/j.apradiso.2019.05.038

Cited by 30 publications

(15 citation statements)

References 23 publications

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“…Approximately 0.20 g of powdered soil samples were weighed using an analytical balance and transferred into small polyethylene vials (Ø = 1 cm × H = 3 cm) and sealed prior to the irradiation process. The duplicate soil samples, blank, mix standard and standard reference materials (SRMs) (IAEA-SL-1, SRM 2709a-San Joaquin Soil) were irradiated in the PUSPATI TRIGA Mark II Reactor at the Malaysian Nuclear Agency for 6 hours at 750 kW, with a thermal flux of 4.0 x 10 12 n.cm -2 s -1 (RR-Rotary rack) [4][5][6][7]. The cooling times of soil samples, blank, mix standard, and SRM were varied from 2 to 4 days for the first counting and 3 to 4 weeks for the second counting.…”

Section: Analysis Of Soil Samples By Using Neutron Activation Analysi...mentioning

confidence: 99%

Assessment of rare earth and actinides (U and Th) elements in soil samples from Kapar industrial area, Selangor

Elias

Azman

Daung

et al. 2022

IOP Conf. Ser.: Mater. Sci. Eng.

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The study of rare earth and actinide elements have received attention nowadays due to rapid development in the extraction of the rare earth industry in Malaysia. Soil samples (18 areas) collected from the Kapar industrial area were analysed by using the neutron activation analysis (NAA) technique for the determination of rare earth elements and actinides (U, Th) concentration. The concentration of rare earth element such as La, Ce, Nd, Sm, Eu, Tb, Dy, Yb and Lu were ranged from 14.7-61.4, 30.6-132.8, 11.7-44.0, 2.12-9.60, 0.37-1.43, 0.03-1.57, 2.20-7.45, 0.28-0.81, and 1.99-4.15 mg/kg, respectively. The concentrations of uranium and thorium were a range of < 0.1-6.74 and 12.6-30.1 mg/kg, respectively. The results of geo-accumulation indicate the all-rare earth elements can be categorised as uncontaminated in all areas with an Igeo value below 0. The concentration of U can be categorised as uncontaminated to moderately contaminated (Igeo class 1) with Igeo values of 0 to 1 in the area of D, F, H, I, L, and N, whilst other areas can be categorised as uncontaminated with Igeo value < 0 (Igeo class 0). The thorium concentration in B, L, and N areas can be categorised as moderately contaminated with Igeo value 1 to 2 (Igeo class 2), whilst most of the area can be categorised as uncontaminated to moderately contaminated (Igeo values 0 to 1). The sources of Th contamination most likely originated from the anthropogenic and geogenic processes.

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Section: Analysis Of Soil Samples By Using Neutron Activation Analysi...mentioning

confidence: 99%

Assessment of rare earth and actinides (U and Th) elements in soil samples from Kapar industrial area, Selangor

Elias

Azman

Daung

et al. 2022

IOP Conf. Ser.: Mater. Sci. Eng.

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“…Adilah et al [5] concluded that nearby mining activity is the main source of pollution in the Jemberau River and Chini River, both of which are classified as Class III (water supply requires significant treatment) because the heavy metal concentration in the water samples is marginally greater than the National Water Quality Standard permissible range. Nevertheless, another study found that anthropogenic activities such as livestock rearing, and oil palm planting are major contributors to low-level heavy metal contamination in the Linggi River [6]. According to the Environmental Quality Report (2013), the percentage of conformity for chromium was just 62 percent, while arsenic was 54 percent for municipal water supply [7].…”

Section: Introductionmentioning

confidence: 99%

Yeast Inhibitive Assay for Anionic Heavy Metals: A review

Sadli

Ammer

Shukor

2022

Bioremed Sci Technol Res

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One of the most common types of pollution that has a negative impact on the biotic community in aquatic habitats is heavy metal poisoning of the water. Both essential and non-essential heavy metals can be toxic to living things if their concentrations are too high for their bioavailability. Although the toxicity of heavy metals, and especially anionic metal ions, is better known than that of cationic metal ions, it is just as toxic, if not more so. The focus of this review is on the usefulness of eukaryotic organisms like yeast, Saccharomyces cerevisiae, for toxicity assessment because they can be easily maintained and developed in controlled circumstances, thereby avoiding variability issues that arise when employing more complex organisms. Recent research has shown that the majority of cellular MTT reduction occurs outside of the mitochondrial inner membrane, and that this reduction is dependent on NADH and NADPH but is resistant to respiratory chain inhibitors.

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“…Adilah et al suggested based on the high levels of heavy metals in the water samples, the researchers concluded that nearby mining activity is the primary cause of pollution in the Class III (water supply requires significant treatment) Jemberau River and Chini River [10]. Nevertheless, another study found that anthropogenic activities such as livestock rearing, and oil palm planting are major contributors of low-level heavy metal contamination in the Linggi River [11]. According to the Environmental Quality Report (2017), the percentage of conformity for chromium was just 62 percent, while arsenic was 54 percent for municipal water supply [12].…”

Section: Introductionmentioning

confidence: 99%

Development of a Yeast Inhibitive Assay for Anionic Heavy Metals Using the 1-(4,5-Dimethylthiazol-2-Yl)-3,5-Diphenyltetrazolium Bromide (MTT) Assay

Sadli¹,

Ammer²,

Shukor³

2022

Bull Environ Sci Sust Manage

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Currently, heavy metals pollution is significantly becoming a global concern as it causes severe toxicity towards human health and the environmental condition. Intensive efforts to develop a highly sensitive, rapid, and simple toxicity assay to assess the toxic effects of heavy metals in aquatic bodies have been done. An emerging tool to solve this matter is by using microorganisms and one of them is yeast. In this study, a rapid, simple, and cost-efficient toxicity assay by using the Baker’s yeast (Saccharomyces cerevisiae) respiration assay with a tetrazolium dye (MTT) is developed as potential environmental biomonitoring tool. To achieve high sensitivity, optimization using one-factor-at-a-time (OFAT) was first carried out. The best conditions giving optimum response occurred at pH 5.8 and 30 min contact time. Molybdate and chromate exhibited exponential decay type inhibition curves with calculated half maximal inhibitory concentration, IC50 of 1.137 mg/L for molybdate and 1.247 mg/L for chromate. The Limits of detection (LOD) were 0.313 mg/L and 1.247 mg/L for molybdate and chromate, respectively. The newly developed assay can help in monitoring heavy metals pollution in rivers and agricultural areas.

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Rare earth elements (REEs) as pollution indicator in sediment of Linggi River, Malaysia

Cited by 30 publications

References 23 publications

Assessment of rare earth and actinides (U and Th) elements in soil samples from Kapar industrial area, Selangor

Assessment of rare earth and actinides (U and Th) elements in soil samples from Kapar industrial area, Selangor

Yeast Inhibitive Assay for Anionic Heavy Metals: A review

Development of a Yeast Inhibitive Assay for Anionic Heavy Metals Using the 1-(4,5-Dimethylthiazol-2-Yl)-3,5-Diphenyltetrazolium Bromide (MTT) Assay

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