scholarly journals Distribution of Selected Dissolved and Particulate Heavy Metals in Lake Kenyir, Malaysia

2021 ◽  
Vol 37 (6) ◽  
pp. 1307-1316
Author(s):  
Royston Uning ◽  
Fatin Adlina Md Nasir ◽  
Suhaimi Suratman
Keyword(s):  
Heavy Metals ◽  
Surface Waters ◽  
Anthropogenic Activities ◽  
Quality Standard ◽  
Untreated Sewage ◽  
Particulate Form ◽  
Bottom Waters ◽  
Dissolved Heavy Metals ◽  
The Mean ◽  
Dissolved Form

This study was conducted to determine the concentration and possible sources of dissolved and particulate heavy metals in Lake Kenyir, Terengganu, Malaysia. The heavy metals studied included Cd, Fe, Pb, Zn and Cu. The findings indicated that the mean concentrations found in the dissolved form for surface waters were in decreasing order of Fe>Zn>Pb~Cu>Cd. A similar trend was also recorded for the particulate form i.e., Fe>Zn>Pb~Cu>Cd. In terms of vertical distribution, most of the heavy metals showed a trend of increasing concentrations from the surface to the bottom waters. The main sources of heavy metals were from anthropogenic activities such as discharge of untreated sewage, surface runoff and boat activity. However, the levels of dissolved heavy metals were still lower compared to other study areas in Malaysia. The dissolved heavy metal concentrations were equivalent with Class II based on the National Water Quality Standard for Malaysia.

scholarly journals Monitoring of some dissolved heavy metals in surface waters of north-west Croatia from year 2016 to 2018

2020 ◽  
Vol 7 (2) ◽  
pp. 56-62
Author(s):  
Patricia Mlinarić ◽  
Nikola Sakač ◽  
Anita Ptiček Siročić ◽  
Irena Tomiek
Keyword(s):  
Heavy Metals ◽  
Surface Waters ◽  
Water Samples ◽  
Negative Impact ◽  
North West ◽  
Copper Nickel ◽  
Dissolved Heavy Metals ◽  
Nickel Manganese

Heavy metals have a negative impact on environment and wildlife. In waters, heavy metals appear in two forms, as dissolved and bioavailable; and as solid and non-soluble. We monitored the concentration of dissolved copper, nickel, manganese and iron in water samples at five river locations of north-west Croatia from 2016 to 2018. Concentrations of dissolved nickel measured at Melačka river, near Vularija in Međimurje county and HE Čakovec dam, near Štefanec in Međimurje county were below 5 µg/l and could be considered as not polluted. Concentrations of dissolved copper measured at Plitvica river, near Zbela in Varaždinska county and Horvatska, near Veliko Trgovišće in Krapinsko-Zagorska county were mostly below 5 µg/l and could be considered as not polluted. At Kosteljina river near Jalšje at the Krapinsko-Zagorska county concentrations of dissolved copper were mostly below 5 µg/l; concentrations of dissolved manganese and iron were higher especially during second part of the year, with some fluctuations. For this reason, Kosteljina river could be considered as medium polluted.

Spatio-temporal variation level of heavy metals in surface water and sediment in Tagwai Lake, Minna, Nigeria

2020 ◽  
Vol 29 (1) ◽  
pp. 123-131
Author(s):  
V.I. Chukwuemeka ◽  
E.A. Jimoh ◽  
K.O. Olajide ◽  
Y.I. Auta ◽  
H.S. Auta ◽  
...  
Keyword(s):  
Heavy Metals ◽  
Surface Water ◽  
Anthropogenic Activities ◽  
Absorption Spectrometry ◽  
Average Concentration ◽  
Toxic Heavy Metals ◽  
Water And Sediment ◽  
The Mean ◽  
Spatio Temporal ◽  
Standard Range

The high contamination of aquatic systems with toxic heavy metals is of major concern since the elements are not biodegradable. Heavy metals often get into the water through runoff from farmlands and dumping of effluents from industries into the water bodies. The toxicity of these heavy metals can cause harmful and even lethal effects on the human health. The objective of this study was to investigate the level of Pb, Cu, Mn, and Fe in both surface water and sediment of Tagwai Lake. Atomic Absorption Spectrometry investigation was carried out on the collected and digested water and sediment samples to determine the extent of these heavy metals contamination in the water. The results showed that the average concentration of heavy metals ranked in the following order: Pb>Mn>Cu>Fe with higher concentration in sediment compared to the water. The correspondence of the mean concentrations of heavy metals in water and sediment of the Tagwai Lake with the WHO standard suggests that the mean concentration of Pb, Cu, and Fe lies within the standard range while Mn exceeds the standard range in both the water and sediments. We therefore advocate regular surveillance as a tool for monitoring impacts of anthropogenic activities in the lake to ensure safety of the general populace who depend on it for their livelihood. Keywords: spatio-temporal, heavy metals, sediments, Tagwai Lake

scholarly journals Determination of Heavy Metals in Water Samples from Sungai Kerteh and Sungai Paka, Terengganu, Malaysia

2017 ◽  
Vol 5 (2) ◽  
pp. 74-78
Author(s):  
Nor Sayzwani Sukri ◽  
Jessuta Jothivel ◽  
Rozidaini Mohd Ghazi ◽  
Nor Shahida Shafiee @ Ismail ◽  
Siti Hajar Yaacob ◽  
...  
Keyword(s):  
Heavy Metals ◽  
Dissolved Oxygen ◽  
Water Samples ◽  
Anthropogenic Activities ◽  
Rapid Development ◽  
Chemical Properties ◽  
Heavy Metal Concentration ◽  
Quality Standard ◽  
Heavy Metals Pollution

Rapid development of industrialization and urbanization along Sungai Kerteh and Sungai Pakawas become a problem due to metal pollution. Namely, anthropogenic activities nearby SungaiKerteh and Sungai Paka were contributed to heavy metals pollution into those rivers. The aims forthis study were to determine the selected heavy metals contamination in water samples andcompared with National Water Quality Standard for Malaysia (NWQS). A total of 8 watersamples were collected from both rivers and heavy metal concentration were analyzed usingflame Atomic Absorption Spectroscopy (ASS). Four parameters of physical chemical propertieswere also analyzed which are pH, temperature, dissolved oxygen and turbidity. The ranges ofphysical chemical properties are pH (7.84-8.78), temperature (31.20 -38.70 oC), dissolved oxygen(27.90-107.20%) and turbidity (1.83-10.5 NTU) respectively. The mean of heavy metalsconcentration was ranged as followed; As (2323.00 ug/L) > Hg (571.93 ug/L) > Pb (402.13 ug/L)> Zn (87.13 ug/L) >Cr (74.63 ug/L) > Cu (48.50 ug/L) > Ni (17.25 ug/L) > Cd (11.38 ug/L).When compared with NWQS, most of metals (Cu, Pb, Ni and Zn) are below the NWQS thresholdlimit except As, Cd, Cr and Hg. The output data from this study can be used as database forcontinuous monitoring at both rivers.

scholarly journals Spatial Variation and Source of Dissolved Heavy Metals in the Lancangjiang River, Southwest China

2020 ◽  
Vol 17 (3) ◽  
pp. 732 ◽  
Author(s):  
Bin Liang ◽  
Guilin Han ◽  
Jie Zeng ◽  
Rui Qu ◽  
Man Liu ◽  
...  
Keyword(s):  
Heavy Metals ◽  
Water Quality ◽  
Drainage Basin ◽  
Anthropogenic Activities ◽  
Principal Component ◽  
Mekong River ◽  
Natural Processes ◽  
Dissolved Heavy Metals ◽  
Quality Water ◽  
Potential Risks

Dissolved heavy metals are not only the essential micronutrients, but also the toxic elements for human bodies. To investigate the heavy metal sources and assess the water quality of the Lancangjiang River, dissolved Cr, Ni, Cu, Zn, Mo, and Pb were detected in this study. The results show that dissolved Ni and Mo, Cr and Pb, and Cu and Zn were similarly distributed within the drainage basin. The correlation analysis exhibited that dissolved Ni and Mo had correlation with water parameter, and dissolved Cu was weakly correlated with Ni, indicating that they might be affected by natural processes. The principal component analysis explained 68.342% of the total variance for three principal components, of which dissolved Ni, Mo, and Cu were controlled by natural inputs; dissolved Cu and Cr were affected by anthropogenic activities; and dissolved Zn was influenced by agricultural activities in the downstream. The water quality showed that the water in upstream was worse than in midstream and downstream, and the whole drainage basin had water of excellent quality. Water within the drainage basin poses no risks to human bodies via daily diets and dermal routes. Dissolved Zn, Cu, and Mo occupied the major proportion of heavy metals transporting into the Mekong River. The agricultural inputs of dissolved Zn might pose potential risks to the Mekong River.

scholarly journals Assessment of Heavy Metals in the Sediments of Chalan Beel Wetland Area in Bangladesh

Processes ◽  
2021 ◽  
Vol 9 (3) ◽  
pp. 410
Author(s):  
Mohammad Abdus Salam ◽  
Mohammad Ashraful Alam ◽  
Sulav Indra Paul ◽  
Fatama Islam ◽  
Dinesh Chandra Shaha ◽  
...  
Keyword(s):  
Heavy Metals ◽  
Anthropogenic Activities ◽  
Risk Index ◽  
Contamination Factor ◽  
Principal Component ◽  
Potential Ecological Risk ◽  
Northwestern Part ◽  
Accumulation Index ◽  
Significant Enrichment ◽  
The Mean

This study aimed to determine the levels and possible sources of heavy metals (HMs) in the sediments of Chalan beel (a large lake-like aquatic ecosystem) area located in the northwestern part of Bangladesh. The mean concentrations (mg kg−1) of two HMs, Cd (6.22) and Pb (51.39) exceeded the world normal averages (WNA), whereas the mean concentrations (mg kg−1) of Ni (60.46), Zn (10.75), Mn (8.64) and Cu (4.71) were below the WNA. The sediments showed significant enrichment with Cd, Pb and Ni in the studied area. The geo-accumulation index values of Cd (3.72) and Pb (0.76) were significantly higher in the sediments. The contamination factor and potential ecological risk index values of Cd and Pb revealed that Chalan beel was extremely and moderately contaminated by these heavy metals, respectively. Analysis of dye complexes used in handlooms around the Chalan beel areas revealed that mean concentrations of Cd and Pb exceeded the WNA. Furthermore, analyses of principal component, cluster and correlation matrix indicated that the presence of the higher levels of Cd and Pb in the sediments might be linked to various anthropogenic activities like discharged dyes into the beel water from the nearby handloom dyeing factories.

scholarly journals Profiling indigenous lead-reducing bacteria from Tempe Lake, South Sulawesi, Indonesia as bioremediation agents

2020 ◽  
Vol 21 (10) ◽  
Author(s):  
AHMAD YANI ◽  
MOHAMAD AMIN ◽  
Fatchur Rohman ◽  
ENDANG SUARSINI ◽  
WIRA EKA PUTRA
Keyword(s):  
Heavy Metals ◽  
Anthropogenic Activities ◽  
Quality Standard ◽  
Morphological Observation ◽  
Comamonas Testosteroni ◽  
Sequencing Data ◽  
Water Contaminants ◽  
Indigenous Bacteria ◽  
South Sulawesi ◽  
Reducing Bacteria

Abstract. Yani A, Amin M, Rohman F, Suarsini E, Putra WE. 2020. Profiling indigenous lead-reducing bacteria from Tempe Lake, South Sulawesi, Indonesia as bioremediation agents. Biodiversitas 21: 4778-4786. The pollution of heavy metals by anthropogenic activities in freshwater, especially in lakes, reduces the quality and endangers the existence of aquatic flora and fauna. This happens in Lake Tempe, which is located, in South Sulawesi, Indonesia. The study aimed to evaluate the content of heavy metals, isolation, and identify a lead reduction of indigenous bacteria as candidates for bioremediation agents. It began by examining the level of cadmium (Cd), copper (Cu), and lead (Pb) in seven sampling sites of Tempe Lake. Furthermore, propagation and isolation, morphological observation, laboratory-scale reduction tests, and species identification of potential bacteria reduction Pb were performed by using 16s rDNA. The reduction test to Pb was measured using Atomic Absorption Spectrometry (AAS), and the research data were analyzed using One-Way ANOVA with the Duncan advanced method. The results showed that the Cd, Cu, and Pb content of the seven sampling points exceeded the water quality standard Following the Indonesian Government Regulation (IGR) and WHO standards. Pb has the highest concentration among the other heavy metals in the water sample reaching 0.40 mg/L. Four bacterial isolates could grow on Pb-enriched media (isolates A, B, C, and D). The Bacillus form was found in two different species bacteria (isolate A and D), while the cocci shape was found in two other species (isolate B and C). Those all Gram-negative bacteria were observed to be a reduction to Pb exposure within a bacterial medium. Interestingly, these indigenous bacteria could decrease Pb concentration ranging from 7.45 to 3.48 ppm for seven days. Furthermore, the sequencing data showed that the indigenous bacteria (isolate D) had a 99.90% similarity to the Comamonas testosteroni strain S-2 constructed using Neighbor-joining phylogenetic analysis. Therefore, the indigenous bacteria C. testosteroni strain S-2 from Tempe lake may be proposed as a bioremediation agent to reduce Pb the water contaminants.

LEVELS OF HEAVY METALS IN SOME SELECTED FISH OF RIVER GONGOLA BASIN, ITS DAM AND DADINKOWA DAM, GOMBE STATE NIGERIA

2021 ◽  
Vol 5 (2) ◽  
pp. 498-510
Author(s):  
A. H. Santuraki ◽  
A. U. Babayo ◽  
Abdu Zakari ◽  
A. G. Abdulkadir
Keyword(s):  
Heavy Metals ◽  
Physicochemical Properties ◽  
Suspended Solids ◽  
Anthropogenic Activities ◽  
Clarias Gariepinus ◽  
Dry Season ◽  
Wet Season ◽  
Fish Samples ◽  
The Mean ◽  
Mean Concentration

This study was carried out in ten (10) different locations within River Gongola, its Dam, and Dadinkowa Dam, Gombe State, Nigeria during the wet and dry season to study the water quality in terms of physicochemical properties to ascertain the levels of contaminants due to flooding and anthropogenic activities and the levels of heavy metals (Cr, Cd, Pb, and Ni) in the two species of fish (Clarias gariepinus and Bagrus docmak). A total of 200 water and 360 fish samples comprising two different species were collected in the month of March-June 2017 (Dry season) and July-October 2017 (Wet Season). The results of physicochemical properties obtained ranges between Temperature 29.0-30 0C and 30-32 0C, pH 5.4-7.8 and 6.0-6.9, Conductivity 93.3-161 μS/cm3 and 104.9-128 μS/cm3, Dissolved oxygen 1.2-3.98 mg/l and 0.4-3.1 mg/l, Total Suspended Solids 10-860 mg/l and 13-1180 mg/l, Total Dissolved Solids 46.5-80.5 mg/l and 54.2-76.5 mg/l, Turbidity 424.7-783.5 NTU and 11.15-442.1 NTU, Phosphate 1.82-7.23 mg/l and 0.00-0.11 mg/l, and Nitrate 2.25-8.82 mg/l and 2.68-6.81 mg/l during wet and dry season respectively. The result reveals that turbidity, PO43, DO, TSS, and TDS were above the acceptable permissible limits of WHO While the mean concentration levels of heavy metals in Clarias gariepinus and Bagrus docmak revealed that Cr was below the detectable limit while Cd ranges between 0.5-7.75 µg/g, Pb rangesbetween 3.9-35.6 µg/g during the wet and dry season. The mean concentrations of all the studied metals were above the permissible limit of WHO with a higher concentration during the dry season.

scholarly journals ECOLOGICAL RISK ASSESSMENT AND POLLUTION LOAD OF HEAVY METALS IN SOILS WITHIN BORI URBAN, RIVERS STATE, NIGERIA.

2020 ◽  
Vol 2 (1) ◽  
Keyword(s):  
Heavy Metals ◽  
Ecological Risk ◽  
Urban Soils ◽  
Anthropogenic Activities ◽  
Risk Index ◽  
Potential Ecological Risk ◽  
Pollution Load ◽  
Ecological Risk Index ◽  
The Mean ◽  
Heavy Metals In Soils

The study assessed the ecological risk and polluting load of heavy metals (Cd, Cr, Cu, Ni, Pb and Zn) in surface soils within Bori Urban. The composite soil samples collected from different locations were prepared and atomic absorption spectrophotometer (AAS) was used for the analysis of the heavy metals. From the results of the analysis, the mean concentrations (mg/kg) of the heavy metals decreased in the order Cu (37.42) > Ni (34.06) > Cr (28.66) > Zn (7.75) >Pb (2.03) > Cd (0.89). The mean concentrations of Cd, Cu, and Ni were above USEPA soil guidelines and world unpolluted soil average, while those of Pb and Zn were below. The mean concentrations of the heavy metals from the study locations were all above that of the control location. The findings indicated that the urban soils of the study were loaded with heavy metals due to anthropogenic activities. The anthropogenic percentage input was in the range of 63.92 - 89.13 above 50% indicating anthropogenic origin of the heavy metals in soils of the study area. The results of ecological risk index (Er) indicated that Cd with Er (467.40) contributed up to 94.51% to the potential ecological risk index (RI) while Zn (0.78) contributed 0.16%. The heavy metals under study posed highly strongly potential ecological risk with RI value of 494.56 to the Bori urban soil due to anthropogenic activities. The ANOVA result of FCal 6.42 > [F(5.30) = 2.53, P< 0.05)] revealed significant differences between the soil sample mean values due to different anthropogenic pollution sources with different loads of heavy metals as pollutants. The Omega Squared (w2) value of 0.52 > 0.14 showed very strong interactive relationship among the heavy metals to bring about high level of ecological potential risk of the urban soils in the study area. Based on the findings, the surface soils have elevated load of heavy metals thereby posing ecological potential risk to Bori urban soils. Therefore, there should be periodic monitoring and environmental audit by relevant authorities to ensure good soil quality of Bori urban soil. Keywords: Potential ecological risk, pollution load, Bori Urban, Anthropogenic Percentage input, contamination Factor.

scholarly journals Water Quality and Heavy Metals Distribution in Surface Water of the Kelantan River Basin (Malaysia)

2019 ◽  
Vol 35 (4) ◽  
pp. 1254-1264 ◽  
Author(s):  
Yet Yin Hee ◽  
Suhaimi Suratman ◽  
Azyyati Abdul Aziz
Keyword(s):  
Heavy Metals ◽  
Water Quality ◽  
River Basin ◽  
Anthropogenic Activities ◽  
Quality Standard ◽  
Aquatic Environments ◽  
Decomposition Of Organic Matter ◽  
River Basin Development ◽  
Kelantan River Basin ◽  
Water Quality Status

This paper explores the water quality status of the Kelantan River from the middle to lower reaches of the basin, during the dry and wet seasons, in order to provide a scientific reference for protecting local aquatic environments and managing river basin development in the future. Although research shows that this river basin is fell in Class I under Malaysian National Water Quality Standard in term of heavy metals, the river was overall classified as slightly polluted, based on the Malaysian Department of Environment-Water Quality Index (DOE-WQI), with total suspended solids (up to 291 mg/L) reaching the allowable threshold limit established by DOE. Field data suggests that the decomposition of organic matter could have resulted in lowering the dissolved oxygen levels in the water column. With regards to heavy metals, it was found that they mainly originated from natural sources, but with an increasing level of contribution from anthropogenic activities.

scholarly journals SPATIAL DISTRIBUTION OF HEAVY METAL CONTAMINATION IN GROUNDWATER OF ONITSHA URBAN, SOUTHEAST NIGERIA

2021 ◽  
pp. 11-22
Author(s):  
E.I Okoyeh ◽  
V.C Ahaneku ◽  
A Utom ◽  
I.E Udegbunam ◽  
G.E Egwuonwu
Keyword(s):  
Heavy Metals ◽  
Spatial Distribution ◽  
Water Samples ◽  
Heavy Metal Contamination ◽  
Anthropogenic Impacts ◽  
Quality Standard ◽  
Mean Value ◽  
High Concentration ◽  
The Mean ◽  
High Concentrations

The investigation of the degree of trace heavy metals contamination in groundwater wells in Onitsha Southeast Nigeria, was carried out based on 20 preselected sample locations. The result of the analysis revealed water of relatively high acidity with pH ranging from 4.93 t0 6.94. The EC values for the analysed water samples ranged from 10.80 to 60.90u while TDS ranges from 20.00 to 410.00.Heavy metals in the form of Arsenic (As), Cadmium (Cd), Chromium (Cr), Iron (Fe), Nickel (Ni), Zinc (Zn), Vanadium (V) and Copper (Cu) were analyzed for their concentration in the water samples of the area. The study revealed that the mean value of Fe (0.832000 ± 1.0626228ppm) and Cd (0.043750 ± 0.0181713ppm) exceeded the permissible limit for NSDWQ water quality standard as indicated by the high concentrations of Fe and Cd values observed in water samples of the study area. The concentrations of the heavy metals except Fe and Cd range from Ni (0.000 – 0.750),(Cu 0.00 - 0.105), (Zn 0.00 – 1.798), (Cr 0.002 – 0.046), (As 0.000 – 0.056) and (Va 0.000 - 0.008). The spatial distribution of the heavy metals in the area shows that the eastern part of the study area has relative high concentration of the heavy metals which is attributed to anthropogenic impacts.

Sign in / Sign up

Export Citation Format

Share Document