Assessing Cu remobilization in reservoir riparian soils prior to water impoundment using DGT and geochemical fractionation

Geoderma ◽  
2018 ◽  
Vol 327 ◽  
pp. 55-62 ◽  
Author(s):  
Haoran Sun ◽  
Bo Gao ◽  
Li Gao ◽  
Dongyu Xu ◽  
Ke Sun
Keyword(s):  
Geochemical Fractionation ◽  
Riparian Soils ◽  
Water Impoundment

State-of-the-Art of Modeling Surface Water Impoundments

1982 ◽  
Vol 14 (1-2) ◽  
pp. 241-261 ◽  
Author(s):  
P A Krenkel ◽  
R H French
Keyword(s):  
Water Quality ◽  
Surface Water ◽  
State Of The Art ◽  
Rate Coefficients ◽  
Two Dimensional ◽  
One Dimensional ◽  
Integral Energy ◽  
Range Of Values ◽  
Dimensional Integral ◽  
Water Impoundment

The state-of-the-art of surface water impoundment modeling is examined from the viewpoints of both hydrodynamics and water quality. In the area of hydrodynamics current one dimensional integral energy and two dimensional models are discussed. In the area of water quality, the formulations used for various parameters are presented with a range of values for the associated rate coefficients.

Desorption kinetics of heavy metals in the gleyic layer of permafrost-affected soils in Arctic region assessed by geochemical fractionation and DGT/DIFS

CATENA ◽  
2021 ◽  
Vol 206 ◽  
pp. 105539
Author(s):  
Xiaowen Ji ◽  
Yu Cheng ◽  
Evgeny Abakumov ◽  
Hao Zhang ◽  
Chao Han ◽  
...  
Keyword(s):  
Heavy Metals ◽  
Arctic Region ◽  
Desorption Kinetics ◽  
Geochemical Fractionation ◽  
Kinetics Of

scholarly journals Salinization alters fluxes of bioreactive elements from stream ecosystems across land use

2015 ◽  
Vol 12 (23) ◽  
pp. 7331-7347 ◽  
Author(s):  
S. Duan ◽  
S. S. Kaushal
Keyword(s):  
Land Use ◽  
Organic Carbon ◽  
Fresh Water ◽  
Dissolved Inorganic Carbon ◽  
Stream Water ◽  
Urban Land Use ◽  
Stream Ecosystems ◽  
Accelerated Weathering ◽  
Nutrient Mobilization ◽  
Riparian Soils

Abstract. There has been increased salinization of fresh water over decades due to the use of road salt deicers, wastewater discharges, saltwater intrusion, human-accelerated weathering, and groundwater irrigation. Salinization can mobilize bioreactive elements (carbon, nitrogen, phosphorus, sulfur) chemically via ion exchange and/or biologically via influencing of microbial activity. However, the effects of salinization on coupled biogeochemical cycles are still not well understood. We investigated potential impacts of increased salinization on fluxes of bioreactive elements from stream ecosystems (sediments and riparian soils) to overlying stream water and evaluated the implications of percent urban land use on salinization effects. Two-day incubations of sediments and soils with stream and deionized water across three salt levels were conducted at eight routine monitoring stations across a land-use gradient at the Baltimore Ecosystem Study Long-Term Ecological Research (LTER) site in the Chesapeake Bay watershed. Results indicated (1) salinization typically increased sediment releases of labile dissolved organic carbon (DOC), dissolved inorganic carbon (DIC), total dissolved Kjeldahl nitrogen (TKN) (ammonium + ammonia + dissolved organic nitrogen), and sediment transformations of nitrate; (2) salinization generally decreased DOC aromaticity and fluxes of soluble reactive phosphorus from both sediments and soils; (3) the effects of increased salinization on sediment releases of DOC and TKN and DOC quality increased with percentage watershed urbanization. Biogeochemical responses to salinization varied between sediments and riparian soils in releases of DOC and DIC, and nitrate transformations. The differential responses of riparian soils and sediments to increased salinization were likely due to differences in organic matter sources and composition. Our results suggest that short-term increases in salinization can cause releases of significant amounts of labile organic carbon and nitrogen from stream substrates and organic transformations of nitrogen and phosphorus in urban watersheds. Given that salinization of fresh water will increase in the future due to human activities, significant impacts on carbon and nutrient mobilization and water quality should be anticipated.

Assessment of labile Zn in reservoir riparian soils using DGT, DIFS, and sequential extraction

2018 ◽  
Vol 160 ◽  
pp. 184-190 ◽  
Author(s):  
Qiuyun Xu ◽  
Li Gao ◽  
Wenqi Peng ◽  
Bo Gao ◽  
Dongyu Xu ◽  
...  
Keyword(s):  
Sequential Extraction ◽  
Riparian Soils

scholarly journals Effects of freezing and soil drought on the geochemical fractionation of americium in Fluvisol and Cambisol soils from Bulgaria

2013 ◽  
Vol 56 (1) ◽  
pp. 1-12 ◽  
Author(s):  
Petya Kovacheva ◽  
Desislava Yovkova ◽  
Boian Todorov ◽  
Rumyana Djingova
Keyword(s):  
Soil Drought ◽  
Geochemical Fractionation
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