Evaluating ecological risks and tracking potential factors influencing heavy metals in sediments in an urban river

Liu, Dongping; Wang, Jian; Yu, Han‐Qing; Gao, Hongjie; Xu, Weining

doi:10.1186/s12302-021-00487-x

Cited by 37 publications

(15 citation statements)

References 46 publications

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“…A higher mean Pb level (169.8 mg/kg) was reported in Deepor Beel, a Ramsar site and of the largest freshwater lakes of the Brahmaputra Valley, located in Guwahati city, Assam, India [ 36 ]. The maximum Pb content in the current study is lower than that reported in Kinshasa City, Congo urban rivers and other urban rivers across the world [ 7 ], Langat River, Malaysia [ 5 ], river Hindon, India [ 8 ], and urban river sediments in China [ 10 , 13 , 37 ] but was higher than those reported in river Couvary, India [ 38 ], river Ganga, India [ 39 ], urban river sediments in China [ 1 , 33 , 40 ].…”

Section: Resultscontrasting

confidence: 78%

“…Similarly, the maximum concentration of Zn reported in the river Bharalu was lower than those reported in urban rivers of Kinshasa City, Congo [ 7 ], river Couvary, India [ 38 ], Turag River, Bangladesh [ 41 ], urban river sediments, China [ 1 , 10 , 33 , 40 , 42 ] but was higher than those reported in Langat River, Malaysia [ 5 ] and river Ganga, India [ 39 ]. The maximum Ni level was lower than those reported in river Hindon, India [ 8 ], and urban river sediments in China [ 7 , 37 , 42 ].…”

Section: Resultsmentioning

confidence: 90%

“…Zn’s highest potential ecological risks occurred in sediments from a polluted urban river in central Bangladesh [ 41 ]. The high ecological risk was also observed in Shenyang City, China, in urban river sediments, indicating the importance of effective sewage management to protect the urban rivers’ environmental quality [ 33 ]. Due to the unavailability of toxicity coefficient values, we cannot calculate the ecological risk index (E r and RI) for Fe.…”

Section: Resultsmentioning

confidence: 99%

“…The following formulae were used to determine RI [ 30 , 33 ]: where is the contamination coefficient, is the determined concentration of heavy metal i, and is the background value of heavy metal ‘i’ in sediments. is the toxicity coefficient; its values for Pb, Zn and Ni are 5, 1 and 5, respectively [ 34 ].…”

Section: Methodsmentioning

confidence: 99%

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Heavy metals contamination in sediments of Bharalu river, Guwahati, Assam, India: A tributary of river Brahmaputra

et al. 2023

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This study aimed to assess heavy metals in the surface sediments of the Bharalu river, India. Metal concentrations ranged from 6.65−54.6 mg/kg for Ni, 25.2−250.0 mg/kg for Zn, 83.3−139.1 mg/kg for Pb, and 11940.0−31250.0 mg/kg for Fe. The level of metal contamination was assessed using sediment quality guidelines, geo-accumulation index (Igeo), enrichment factor (EF), pollution Load Index (PLI),Nemerow’s pollution index (PIN), and potential ecological risk index. Pb exceeded the sediment quality guidelines at all sites indicating a potential threat to the river ecosystem. (Igeo) and EF also showed moderate to severe enrichment for Pb. Potential ecological risk (RI) showed low risk in the sediments, and Pb is the major contributor to ecological risk. Overall, pollution indices revealed comparably higher contamination of the sediments in the downstream sites than in the upstream site. PCA and correlation matrix analysis indicated both anthropogenic and natural origins for metals. Among anthropogenic sources, urban discharges and waste dumping could be mainly attributed to metal contamination in the river sediments. These findings may aid in developing future river management methods explicitly aimed at tackling heavy metal pollution to prevent further damage to the river ecosystem.

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Section: Resultscontrasting

confidence: 78%

Section: Resultsmentioning

confidence: 90%

Section: Resultsmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

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Heavy metals contamination in sediments of Bharalu river, Guwahati, Assam, India: A tributary of river Brahmaputra

et al. 2023

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“…Pollution of water systems with heavy metals resulting from industrial activities and social-economic development has evolved a global environmental problem that has obtained wide attention due to the high toxicity of these metals and their non-dissolution and stability [1][2]. Interest in sediment pollution has increased because it represents an important evidence of environmental change caused by human activities [3].…”

Section: Introductionmentioning

confidence: 99%

Vertical and Lateral Variation of Ecological Risk Index of Heavy Metals in the Euphrates River Sediments between Heet and Fallujah, Iraq.

Saber

Saod

Al-Heety

2023

IOP Conf. Ser.: Earth Environ. Sci.

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The heavy metals (HMs) contamination of river sediments and their ecological risks is a global environmental problem that has attracted the attention of researchers and those interested in environmental protection. The study aims to investigate the ecological hazards of some HMs in sediments of Euphrates River between the cities of Heet and Fallujah, Iraq and their lateral and vertical variations. At three depths—0-30, 30-60, and 60-90 cm—samples of sediment were collected from five sites. Atomic Absorption Flame Emission Spectrophotometer (ASC.7000) was used to measure concentration of Cd, Cr, Cu, Ni, Pb, and Zn. The ecological risk index (ErI) values of metals in Euphrates River sediment in the study area take the following descending order: Cd > Ni > Cu > Cr > Pb > Zn. The ErI levels were low for Cr, Cu, Ni, Pb and Zn and considerable ecological risk for Cd. The obtained results did not show a common lateral variation pattern of the ecological risk of the measured metals. There is a high level of risk for the measured metals at the downstream sampling sites except for the risk from Cd on the contrary. The potential ecological risk of Cd, Cr, Pb and Zn showed a similar vertical variation pattern which in turn reflects a common source or origin for these metals, while copper and nickel showed a different common distribution pattern.

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A probabilistic risk assessment of heavy metal in water and sediment: An industrially affected urban river in Bangladesh

Ahmed,

Islam,

Quraishi

et al. 2024

Water Environment Research

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Human welfare and biodiversity are at risk due to the deterioration of water and sediment quality. Particularly, in last few decades, global water and sediment quality degraded due to the rapid industrialization and urbanization. This study aimed to determine the concentration of nine heavy metals and metalloid (Pb, Cr, Cd, Hg, As, Mn, Ni, Cu, and Zn) and assess the ecological risks using different pollution indices (e.g., heavy metal pollution index [HPI], Nemerow pollution index [NI], geo‐accumulation index [Igeo], contamination factor [CF], degree of contamination [CD] and pollution load index [PLI], ecological risk index [ERI]) in water and sediment of the Shitalakshya River, an industrially affected urban river of Bangladesh. For the first time, 20 water and sediment samples were collected across a wider geographical area of the Shitalakshya River during both monsoon and dry seasons and analyzed using the atomic absorption spectrometer. Average concentrations of heavy metals and metalloid in water were within the Bangladesh standard except for Cr (51.69 ppb) and Mn (228.20 ppb) during monsoon season, portraying potential ecological and human health risks. Besides, average concentration of Mn (549.75 and 370.93 ppb), Ni (549.75 and 370.93 ppb), and Cu (45.34 and 36.09 ppb) in sediment during both seasons were above international standard, implying risk to aquatic sediment biota. The average HPI values indicated moderate to high contamination, whereas the NI values implied polluted water in monsoon season with severe pollution in port area of the river. Similarly, Igeo, CF, CD, and PLI elucidated different levels of contamination in the sediment, particularly during dry season. The ERI values also referred moderate ecological risk in the sediment during dry season. Overall, our findings highlight the alarming level of heavy metal pollution in the Shitalakshya River, necessitating immediate action to protect the aquatic environment, sediment biota, and human health.Practitioner points This study determined the concentration of heavy metals and metalloid in water and sediment of the Shitalakshya River, Bangladesh. The study revealed that the average concentration of Cr and Mn in water exceeded national standard, whereas Mn, Ni, and Cu in sediment exceeded international limit. Potential ecological risk of heavy metals was also assessed using different pollution indices. Calculated pollution indices indicated different degree of pollution, implying critical ecological condition due to heavy metal pollution in aquatic environment and sediment biota.

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Evaluating ecological risks and tracking potential factors influencing heavy metals in sediments in an urban river

Cited by 37 publications

References 46 publications

Heavy metals contamination in sediments of Bharalu river, Guwahati, Assam, India: A tributary of river Brahmaputra

Heavy metals contamination in sediments of Bharalu river, Guwahati, Assam, India: A tributary of river Brahmaputra

Vertical and Lateral Variation of Ecological Risk Index of Heavy Metals in the Euphrates River Sediments between Heet and Fallujah, Iraq.

A probabilistic risk assessment of heavy metal in water and sediment: An industrially affected urban river in Bangladesh

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