Comprehensive Assessment of Heavy Metal Contamination in Surface Sediments from the Inflow Rivers of Taihu Basin

Cai, Ying; Zhang, Wenguang; Zhou, Meichun; Jiang, Hao; Xu, Di; An, Shuqing; Leng, Xin

doi:10.1002/clen.201300886

Cited by 11 publications

(7 citation statements)

References 51 publications

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“…Mathematically, EF is expressed as:EF = (M/X) sample /(M/X) background where M is the evaluated element, X is the reference element, and (M/X) sample and (M/X) background are the ratios of an evaluated element and the reference element in the examined and geochemical background, respectively. As a geochemical common factor, aluminum has often been used as the reference element [13]. Thus, the EFs were calculated using Al as reference element and heavy metal background values of soils in Jiangsu Province [14] were chosen as the background.…”

Section: Methodsmentioning

confidence: 99%

“…Thus, the EFs were calculated using Al as reference element and heavy metal background values of soils in Jiangsu Province [14] were chosen as the background. An EF < 2 represents no contamination to minor contamination, 2–5 represents moderate contamination, 5–20 represents significant contamination, 20–40 represents very high contamination, and >40 represents extremely high contamination [10,13].…”

Section: Methodsmentioning

confidence: 99%

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Heavy Metal Accumulation in Common Aquatic Plants in Rivers and Lakes in the Taihu Basin

Bai

Liu

et al. 2018

IJERPH

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We investigated the concentrations of 10 heavy metals in Potamogeton malaianus, Nymphoides peltata, Eichhornia crassipes, and Hydrilla verticillata to evaluate their potential to bioaccumulate heavy metals and related influencing factors in Taihu Lake. Enrichment factor (EF) values of Cu, Cr, Mn, Ni, Zn, Co, Pb, and V were above 2.0, indicating moderate to significant contamination in sediment. Most of Ti, V, Cr, Mn, and Ni in P. malaianus, E. crassipes, and H. verticillata and V in N. peltata were within excess/toxic level in plants, but higher than normal level. Even though no aquatic plants in this study were identified as a hyperaccumulator, relatively higher concentrations in aquatic plants were found in Taihu Lake than have been found in other previous studies. Heavy metal in submerged plants, especially in their stems, seemed to be more closely related to metals in water and sediment than those in floating-leaf plants. Ratios of metals in stem versus leaves in all plants ranged from 0.2 to 25.8, indicating various accumulation capabilities of plant organs. These findings contribute to the application of submerged aquatic plants to heavy metal removal from moderately contaminated lakes.

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Section: Methodsmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

Heavy Metal Accumulation in Common Aquatic Plants in Rivers and Lakes in the Taihu Basin

Bai

Liu

et al. 2018

IJERPH

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“…The most widely used forms of empirical SQGs are based on sediment chemistry and biological effects, and on mechanistic techniques related to equilibrium partitioning 47 . To assess sediment pollution, researchers have developed several SQGs using large data sets 48 . One of the most important methods developed in this area belongs to Long and MacDonald 49 and MacDonald et al 50 , who suggest "consensus-based" SQGs for assessing the environmental effects of metals.…”

Section: Sediment Quality Guidelines (Sqgs)mentioning

confidence: 99%

Concentrations and sources of heavy metals in shallow sediments in Lake Bafa, Turkey

Algül

Beyhan

2020

Sci Rep

125

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the concentrations and sources of heavy metals in shallow sediments in Lake Bafa were investigated. the concentrations of nine heavy metals and the total organic carbon content in sediment samples were determined for between Summer 2015 and Spring 2016. The mean contents of heavy metals were in decreasing order fe > Mn > ni > cr > Zn > cu > co > pb > cd. Sediment quality guidelines indicate that Cr, Cu, and Ni pose a considerable threat to the aquatic ecosystem in Lake Bafa. Site L3 was found to be contaminated with cd, cr, and ni, and the pollution load indices suggest that these metals had anthropogenic sources. the sediment samples were notably enriched with cd and ni. there is no consistent trend for seasonal effect in terms of the sample locations. However, at all sampling points, an increase in heavy metal concentrations was observed in the autumn. the results of a multivariate analysis indicate that the sources of co, cu, fe, Mn, pb, and Zn were all natural, the sources of cd were anthropogenic, and the sources of ni and cr were both anthropogenic and natural. these results highlight that cd, cr, and particularly ni represent the most serious threat in terms of heavy metal pollution in the ecosystem of the lake. Heavy metals mainly enter aquatic environments as a result of a variety of human activities (e.g., agriculture, combustion, corroded underground pipes, industrial plants, sewage, smelting, and vehicles) 1-3. Exposure to heavy metals has been linked to various negative health effects, including cancer, behavioural problems, impaired intelligence, developmental problems, kidney damage, and miscarriage or stillbirth 4. Heavy metals are not readily degraded in the environment, and those that enter a water body can remain there for some time. They are usually found in low concentrations in aquatic systems 5 , and high concentrations of heavy metals in sediments can indicate anthropogenic rather than natural sources 6,7. Heavy metals are poorly soluble in water, so predominantly sorb to suspended particles that then settle as sediment 8. Heavy metals can thus enter the food chain in the aquatic environment, and become available for accumulation in biota 9. Fish, which are at the top of the food chain and are an important food source for humans, can accumulate heavy metals in their tissues 10 , and this characteristic makes them an effective indicator of pollution 11. Accordingly, assessment of pollution from heavy metals in sediments in the environment is very important in terms of its effects on aquatic organisms and human health 12. Lake sediments are a sink for heavy metals 13,14 , and heavy metal concentrations are generally higher in sediment than in water 15. Indeed, concentrations of heavy metals in water are sometimes lower than detection limits, meaning that sediment should be analysed to assess levels of contamination by heavy metals in the aquatic system 16-18. Lake sediments mostly act as a sink for heavy metals; on the other hand, they can also act as a source to the overlying water 19,20. C...

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“…Heavy metals are important constituents of the environment and their inputs always result in the deterioration of the aquatic environment [16]. Most studies have reported that Cu, Cr, Co, and Ni can originate primarily from industrial and urban activities such as electrical machinery operation, chemical production, automobile exhaust, and mining [1,12,[15][16][17].…”

Section: Physicochemical Properties and Heavy Metals In Watermentioning

confidence: 99%

Relationships of Heavy Metals in Water and Surface Sediment with Different Chemical Fractions in Lake Uluabat, Turkey

Hacısalihoğlu¹,

Karaer²

2016

Pol. J. Environ. Stud.

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Expanding urban populations, traditional and developing technologies, and intensive agricultural production have greatly increased the amount of wastewater generated in Turkey and many other countries. Levels of contaminants have also grown, including both organic (e.g., pesticides, petroleum hydrocarbons) and inorganic (e.g., metals) chemicals. The wastewater treatment capacity of the region has fallen far short of the level needed to meet the demand of multiple sectors. As a result, untreated and undertreated wastewater enters many streams and rivers, eventually finding its way to a lake [1]. Lake sediment Pol. J. Environ. Stud. Vol. 25, No. 5 (2016), 1937-1946 Original Research Relationships of Heavy Metals in AbstractLake Uluabat is dependent on the RAMSAR Convention (the Convention on Wetlands of International Importance, especially as waterfowl habitat) which was accepted in Iran in 1971 as a member of Living Lakes network carried out by the Global Nature Fund. The lake is very important in terms of biodiversity. Relationships of physicochemical parameters of lakewater and sediment with chemical fractions of heavy metals (chrome and nickel) in lake sediments were investigated in Lake Uluabat in Bursa, Turkey. The concentrations of Cr and Ni forms (dissolved, particulate, total sediment, sediment fractions) and other water and sediment quality parameters were assessed monthly at 10 sampling points between August 2013 and July 2014. The results demonstrate that the concentrations of water and sediment quality parameters undergo monthly changes. The geoaccumulation (Igeo) index has been widely applied to the assessment of sediment contamination. According to this index, Lake Uluabat has moderately polluted sediment. Cr and Ni concentrations in sediment have been determined to be higher than the upper effect threshold according to international standards. Variations of the fractions of Cr and Ni bound to organic matter (F4), residual, and bound to Fe-oxide fractions (F5) were found to be the most dominant forms. Mostly, all forms of Cr and Ni were significantly and positively correlated with pH, electrical conductivity, and suspended solids. The results revealed the importance and the need for strict control of point and non-point pollution loads for the preservation of Lake Uluabat's water and sediment quality.

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Comprehensive Assessment of Heavy Metal Contamination in Surface Sediments from the Inflow Rivers of Taihu Basin

Cited by 11 publications

References 51 publications

Heavy Metal Accumulation in Common Aquatic Plants in Rivers and Lakes in the Taihu Basin

Heavy Metal Accumulation in Common Aquatic Plants in Rivers and Lakes in the Taihu Basin

Concentrations and sources of heavy metals in shallow sediments in Lake Bafa, Turkey

Relationships of Heavy Metals in Water and Surface Sediment with Different Chemical Fractions in Lake Uluabat, Turkey

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