Phosphorus reference conditions in lowland streams: Survey in old forests and anaerobic sediment release

Lauryssen, Florian; Struyve, Jari; Crombé, Philippe; Maldegem, Elliot Van; Smolders, Erik

doi:10.1016/j.scitotenv.2022.160889

Cited by 3 publications

(1 citation statement)

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“…The smaller the value the lower the buffering capacity of the soil for phosphorus, and vice versa, the better the buffering effect ( Xu et al., 2021 ). DPS can be used to evaluated the soil environmental capacity of phosphorus ( Lauryssen et al., 2023 ), and to predict the potential of soil phosphorus loss, and the greater the DPS, the greater it means that most of the adsorption points on the soil surface that can adsorb phosphate in water have been occupied ( Xu et al., 2022 ). According to Huang and colleagues, ERI of phosphorus was defined by (2004) as the ratio of DPS and PSI.…”

Section: Resultsmentioning

confidence: 99%

Phosphorus adsorption characteristics and release risk in saline soils: a case study of Songnen Plain, China

Jiang,

Yan,

Liu

et al. 2023

Front. Plant Sci.

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IntroductionThe Songnen Plain is one of the three major saline-alkali areas in China, covering a vast area, where drought and overgrazing have exacerbated the salinization trend, and will have great potential for development if utilized rationally. Phosphorus, as one of important soil nutrients, plays a crucial role in plant growth. How to minimize its loss and migration has become a current research hotspot. The objective of the present study was to elucidate the adsorption properties of phosphorus in soils affected by salinization and to establish the correlation between the potential for phosphorus release and soil properties.MethodsA batch treatment test was conducted in this study using three soils with the various salinization degrees to examine the impact of environmental factors on the adsorption properties and potential release of phosphorus.Results and discussionIt was found that the maximum phosphorus adsorption by the three salinization soils in 0-360 minutes accounted for 86.8%-90.5% of the total adsorption capacity; the equilibrium adsorption capacity was: HS> MS> LS. In cases where the phosphorus level in the surrounding liquid is low, the three levels of salinized soils exhibited varying levels of phosphorus discharge, with the adsorbent acting as the origin of contaminants. The Pseudo-second-order model kinetics and Langmuir equation can well describe the adsorption process, and the adsorption process is spontaneous heat absorption with entropy increase. Increasing the pH led to an increase in the adsorption of phosphorus from the three salinized soils. Additionally, the adsorption was enhanced by introducing varying concentrations of Na+, Ca2+, and Al3+ to the background solution. The phosphorus eutrophication release risk (ERI) demonstrated a gradual decline as temperature increased. Correlation analysis revealed a noteworthy positive correlation between TN, TP, and ERI, as well as a significant negative correlation between CEC, K+, and ERI. Furthermore, there was a highly significant negative correlation between coarse silt and fine silt. Considering local climatic and environmental factors is crucial for controlling the adsorption capacity of phosphorus in various salinized soils, as it can unveil the mechanism of phosphorus adsorption and impact its migration and release risk.

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Section: Resultsmentioning

confidence: 99%