A study of synchronous measurement of liable phosphorous and iron based on ZrO-Chelex (DGT) in the sediment of the Chaiwopu Lake, Xinjiang, Northwest China

Zhang, Zhaoyong; Cao, Ricardo; Mamat, Zulpiya; Mamat, Anwar; Chen, Yinguang

doi:10.1007/s11356-020-07701-y

Cited by 9 publications

(8 citation statements)

References 37 publications

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“…Thus, the influence of Mn on the efflux of P in the different ecotype sediments was less compared to Fe (Wang et al 2018). In this study, the seasonal variations suggest that the hypoxia caused the Fe 3+ ions in the sediments to be reduced to soluble Fe 2+ ions causing the efflux of labile P within the sediment (Zhang et al 2020), thus high labile P content from the time of hypoxia to the time of aeration. Specifically, the mean content of labile P (0-30 cm) at X1 and X2 were 0.05 and 0.04 mg/L in summer and 0.03 and 0.01 in winter, respectively.…”

Section: Seasonal Variation and Coupling Relationship Between Phosphorus And Iron In The Swbmentioning

confidence: 60%

“…The high gradient recorded in winter revealed that sediments have a high tendency to fix P due to the presence of oxygen. Similarly, the low gradient recorded during the anoxic period shows that the sediments tend to release reactive P from the sediments (Zhang et al 2020). A research work by Norgbey et al (2020b) revealed that under hypoxia (reductive conditions), the complexes of Fe 3+ are reduced to Fe 2+ .…”

Section: Seasonal Variation and Coupling Relationship Between Phosphorus And Iron In The Swbmentioning

confidence: 94%

“…The TFe in sediment samples was determined using the atomic absorption spectrophotometry (ICE 3000 Thermo Fisher Scientific -USA) while TP in the sediments was tested with the X-ray fluorescence-XRF-Rigaku Supermini200 (Fang et al 2018). The organic matter was analyzed with the potassium dichromate-external heating method (Zhang et al 2020).…”

Section: Seasonal Sediment Samplingmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

“…Fe is a well-known element that plays a significant role in the transformation and mobility of soluble P at the SWB due to its coupling relationship with P at a microlevel (Zhang et al 2020). Zhang et al (2020) revealed that Fe bound P is primarily responsible for the efflux of P in sediments and the correlation between P and Fe is significant. In addition, the efflux of P has a direct relationship with the Fe/P ratio where the efflux of P decreases tremendously when the ratio is greater than 30 (Jensen et al 1992).…”

Section: Introductionmentioning

confidence: 99%

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Seasonal dynamics of iron and phosphorus in reservoir sediments in Eucalyptus plantation region

Norgbey

Yan-peng

et al. 2021

Ecol Process

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Background Iron (Fe) and phosphorus (P) dynamics in sediments have direct and indirect impacts on water quality. However, the mobility of P and Fe in reservoir sediments in Eucalyptus plantation region remains unclear. This study examined P and Fe pollution in sediments in a Eucalyptus plantation region using the novel planar optode, the ZrO-Chelex DGT, and the DIFS model. Results Direct in situ investigations showed that the levels of labile P and Fe were smaller in the Eucalyptus species-dominated sediments (X2) compared to sediments without Eucalyptus species (X1). The mean concentration of labile P and Fe decreased by 25% and 42% from X1 to X2. The decrement was insignificant (p = 0.20) in the surface sediment concentration for labile P. The significant disparity for DGT-Fe (Fe2+) (p = 0.03) observed in the surface sediments could be attributed to the Eucalyptus species’ elevated organic matter (tannins) concentration at X2, which reacted and consumed labile Fe. For both regions, the maximum concentration of labile P and Fe occurred in November (autumn). The reductive decomposition of Fe/Mn oxides was recognized as the main driver for their high P efflux in July and November. Low concentration of labile P and Fe was observed in December (winter) due to the adsorption of Fe/Mn oxides. The concentration of labile Fe synchronizes uniformly with that of labile P in both sediments indicating the existence of a coupling relationship (r > 0.8, p < 0.01) in both regions. The positive diffusion fluxes in both regions suggested that the sediments release labile P and Fe. The fluxes of labile P and Fe in both regions were substantially higher (p < 0.05) in the summer (anoxic period) than winter (aerobic period), indicating that hypoxia and redox conditions influenced the seasonal efflux of labile P and Fe. From the DIFS model, the replenishment ability of reactive P was higher during the anoxic period (R = 0.7, k1 = 79.4 day− 1, k-1 = 0.2 day− 1) than the aerobic period (R = 0.4, k1 = 14.2 day− 1, k-1 = 0.1 day− 1), suggesting that oxygen inhibited the efflux of P in the sediments. Conclusion Our results indicated that hypoxia, Eucalyptus species (organic matter (tannins)), and redox conditions influenced the seasonal mobility of sediment labile P and Fe. Our findings provided an insight into the mobility of labile P and Fe in Eucalyptus-dominated sediments and, moreover, serves as a reference for developing future studies on Eucalyptus-dominated sediments.

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Section: Seasonal Variation and Coupling Relationship Between Phosphorus And Iron In The Swbmentioning

confidence: 60%

Section: Seasonal Variation and Coupling Relationship Between Phosphorus And Iron In The Swbmentioning

confidence: 94%

Section: Seasonal Sediment Samplingmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Seasonal dynamics of iron and phosphorus in reservoir sediments in Eucalyptus plantation region

Norgbey

Yan-peng

et al. 2021

Ecol Process

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Distinct drivers of two size fractions of operationally dissolved iron in a temperate river

Logozzo

Hosen

McArthur

et al. 2023

Limnology & Oceanography

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Riverine dissolved iron (Fe) affects water color, nutrients, and marine carbon cycling. Fe size and coupling with dissolved organic matter (DOM), in part, modulates the biogeochemical roles of riverine Fe. We used size fractionation to operationally define dissolved Fe (< 0.22 μm) into soluble (< 0.02 μm) and colloidal (0.02–0.22 μm) fractions in order to characterize the downstream drivers, concentrations, and fluxes of Fe across season and hydrologic regime at the freshwater Connecticut River mainstem, which we sampled bi‐weekly for 2 yrs. Drivers of colloidal and soluble Fe concentrations were markedly different. The response of colloidal Fe concentration to changes in discharge was modulated by water temperature; colloidal Fe decreased with increasing discharge at temperatures < 10.5°C, but increased with increasing discharge at temperatures > 10.5°C. Conversely, soluble Fe concentrations were only positively correlated to discharge at high temperatures (> 20°C). Soluble Fe was strongly positively correlated to a humic‐like DOM fluorescence component, suggesting coupling with DOM subsets, potentially through complexation. While average colloidal Fe fluxes varied twofold seasonally, soluble Fe fluxes varied ninefold; therefore, soluble Fe variability was more important to the overall dissolved Fe variability than colloidal Fe, despite lower concentrations. Seasonal Fe fluxes were decoupled from discharge: dissolved and soluble Fe fluxes were greatest in the fall, whereas discharge was greatest in the spring. Fluxes of soluble Fe, which may be more bioavailable and more likely to be exported to the ocean, were lowest in the summer when downstream biological demand is high, having implications for primary productivity and iron uptake.

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Combined use of high-resolution dialysis, diffusive gradient in thin films (DGT) technique, and conventional methods to assess trace metals in reservoir sediments

Norgbey

Zhu

et al. 2021

Environ Monit Assess

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A study of synchronous measurement of liable phosphorous and iron based on ZrO-Chelex (DGT) in the sediment of the Chaiwopu Lake, Xinjiang, Northwest China

Cited by 9 publications

References 37 publications

Seasonal dynamics of iron and phosphorus in reservoir sediments in Eucalyptus plantation region

Seasonal dynamics of iron and phosphorus in reservoir sediments in Eucalyptus plantation region

Distinct drivers of two size fractions of operationally dissolved iron in a temperate river

Combined use of high-resolution dialysis, diffusive gradient in thin films (DGT) technique, and conventional methods to assess trace metals in reservoir sediments

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