Sediment composition and its effect on the productivity in Larsemann Hills, East Antarctica

Choudhary, Shabnam; Nayak, G. N.; Tiwari, Abhishek; Khare, Neloy

doi:10.1007/s12517-018-3755-4

Cited by 12 publications

(2 citation statements)

References 73 publications

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“…Based on sediment core, the organic elements were investigated, to solve the source, processes, and productivity in the lacustrine sediments, or to evaluate the potential for redox elements to reveal impacts of anthropogenic loadings, or to separate anthropogenic from geogenic input (Choudhary et al 2018;Macdonald et al 2008;Chaudhary, et al 2013). Simultaneously, vertical pro les of PAHs were assessed and possible sources and distributions were identi ed through the sediment core (Chen et al 2016;Bigus et al 2014;Terence et al 2021).…”

Section: Introductionmentioning

confidence: 99%

Vertical distribution, environmental occurrence, and risk assessment of organic pollutants in lacustrine sediments in southeast China

Lang

Zhao

Chen

et al. 2023

Environ Sci Pollut Res

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To clarify environmental occurrence and ecological risks of Zhushan Bay in Taihu Lake, the characteristics of deposited organic materials (elements and 16 polycyclic aromatic hydrocarbons (∑ 16 PAHs) in a 93-cm sediment core from Taihu Lake were determined. The results showed that the values of nitrogen (N), carbon (C), hydrogen (H), and sulphur (S) ranged from 0.08%~0.3%, 0.83%~3.6%, 0.63%~1.12%, and 0.02%~0.24%, respectively. Signi cant changes in most elements at 50 cm depth due to changes in endogenous input, accompanied by algal blooms. The concentration of ∑ 16 PAHs was in a range of 1807.48 ~ 4674.83 ng g − 1 , showing a downward trend with the deepening of the depth, accompanied by uctuations. The 3-ring PAHs had obvious advantages in surface sediment. Affected by various factors, the change of PAHs concentration also mainly appeared at 50cm depth and it was estimated to occur in the 1900s. The ratio of PAH monomer and PCA results showed that the combustion of fossil fuels was the main source of PAHs in the sediments. The results of the toxicity analysis indicated that most of the PAH monomers had little impact on the ecology, and a small number of monomers were increasing year by year and close to the ERM value, which should be controlled and paid attention to.

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Section: Introductionmentioning

confidence: 99%

Vertical distribution, environmental occurrence, and risk assessment of organic pollutants in lacustrine sediments in southeast China

Lang

Zhao

Chen

et al. 2023

Environ Sci Pollut Res

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“…The susceptibility of particles to external disturbances leads to variations in particle structure, pore size, and other aspects [30] concomitant with the migration transformation of pollutants [31]. Furthermore, the retention and transport of particulates perform essential functions in the phosphorus cycle [32] and still participate in interface exchange [33], the return of fugitive nutrients to the covering waters through resolution and dissolution [34], thereby forming the lake nutrients' endogenous load [35,36] and directly affecting primary productivity and hydro-environmental quality [37,38]. Moreover, various forms and concentrations of phosphorus in SSPs contribute differently to lake eutrophication [39], making it essential further to explore pollutant water-sediment interface processes in lakes and to gain insight into the transport dynamics of SSPs [40].…”

Section: Introductionmentioning

confidence: 99%

Physicochemical Properties and Environmental Effects of Suspended Sediment Particles in the Largest Freshwater Lake, China

et al. 2023

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Suspended sediment particles (SSPs) act as a potential source of and sink for aquatic pollution. This study sampled six sites in Poyang Lake in August and November 2019. Changes in the physicochemical properties of SSPs were analyzed using scanning electron microscope energy-dispersive spectrometry (SEM-EDS). The results showed that SSPs consisted mainly of clay and chalk, with an average content of 39.71% and 57.52%, respectively. The average particle size distribution of SSPs in the study area ranged from 5.54 to 15.97 μm and the spatial distribution pattern showed the north lake area (I) > west lake area (II) > east lake area (III). The angle (K) of morphological indicators varied widely, with coefficients of variation between 0.25 and 1.23. Water-flow velocity was negatively correlated with SSP size, while suspended-solid concentration was positively correlated with SSP surface roughness. Morphological parameters, chemical composition, and correlation between each SSP form were analyzed to identify morphological distribution characteristics. Linear regression equations estimated endogenous phosphorus load in zones I, II, and III as 1027.202 mg/kg, 1265.343 mg/kg, and 1013.111 mg/kg respectively. Therefore, we conclude that the morphological differences in particulate matter, the interaction between chemical fractions, and the aqueous environment affecting the distribution of phosphorus fugitive forms, may contribute to endogenous lake pollution. These results are essential for revealing the intrinsic relationship between SSP physicochemical properties and lake eutrophication and studying other water–sediment interface processes of lake pollutants.

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Nutrient Cycling and Productivity in Antarctic Lakes

Choudhary

Nayak

Khare

2022

Earth and Environmental Sciences Library

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Sediment composition and its effect on the productivity in Larsemann Hills, East Antarctica

Cited by 12 publications

References 73 publications

Vertical distribution, environmental occurrence, and risk assessment of organic pollutants in lacustrine sediments in southeast China

Vertical distribution, environmental occurrence, and risk assessment of organic pollutants in lacustrine sediments in southeast China

Physicochemical Properties and Environmental Effects of Suspended Sediment Particles in the Largest Freshwater Lake, China

Nutrient Cycling and Productivity in Antarctic Lakes

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