Effect of different K:Na ratios in soil on dispersive charge, cation exchange and zeta potential

Farahani, Elham; Emami, Hojat; Fotovat, Amir; Khorassani, Reza

doi:10.1111/ejss.12735

Cited by 25 publications

(7 citation statements)

References 35 publications

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“…With the increase in concentration, the adsorption of exogenous cations is also weakened. Thus, the interfacial interactions of clay particles and cations depend on the concentration of exogenous cations, which is similar to the result of Farahani et al (Farahani et al, 2019). Such issues were further evidenced by the results of the variation in coordination environment and adsorption free energy of mixed cations.…”

Section: Implications For the Interfacial Interactionssupporting

confidence: 85%

“…This means that exogenous cations brought in by chemical fertilizers tended to promote the release of intrinsic potassium ions in soils with a high content of illite particles. The competition between mixed cations at the mineral surface has been observed in previous studies (Cheng & Heidari, 2018;de Poel et al, 2017;Döpke et al, 2019;Farahani, Emami, Fotovat, & Khorassani, 2019;Yang et al, 2020). The maximum increase in M + increases as Ca 2+ (10.8) < Na + (14.2) < K + (16.8) < Cs + (19.3), whereas the maximum decrease in K 0+ decreases as Ca 2+ (14.2) > Na + (11.2) > Cs + (9.2) > K + (8.7) (Figure 3).…”

Section: Competition Between Exogenous Cations and Intrinsic Potassiu...supporting

confidence: 55%

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Adsorption of cations at the illite–water interface and its effect on intrinsic potassium ions

Xing

Tang

et al. 2021

European J Soil Science

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Na + , K + , Cs + and Ca 2+ are common exogenous cations that could be introduced into soils either via long-term tillage with inorganic fertilizers or the leakage of nuclear waste. However, the manner in which they co-adsorb and compete with the intrinsic potassium ions in illite, the response of intrinsic potassium (K 0+ ), as well as the underlying mechanisms of these interactions, remain unclear. These aspects were explored using molecular dynamics simulations based on a series of concentrations. Because of the competition between exogenous cations and K 0+ , the number of adsorbed exogenous cations such as Na + increased by 11.2, whereas the corresponding number of adsorbed potassium decreased by 14.2, with the increase in concentration from 0.1 to 1.0 molÁL À1 , indicating that long-term application of inorganic fertilizers tends to promote the release of intrinsic potassium. This was further validated from the increased adsorption free energy of IS (inner-sphere) K 0+ , which increased from À54.3 kJÁmol À1 (0.1 molÁL À1 ) to À42.9 kJÁmol À1 (1.0 molÁL À1 ). The stability of both exogenous cations and intrinsic potassium decreased with the increase in concentration. This was mainly caused by the reduction of illite-cation interactions, as evidenced by the radial distribution function analysis. Nonetheless, intrinsic potassium always dominated the competition, as its abundance was lower than that of exogenous cations only beyond 0.7 molÁL À1 . Different exogenous cations exerted diverse effects on the intrinsic potassium and may vary with the concentration, as reflected by the distribution, adsorption number, coordination environment and adsorption stability.Generally, the effect of exogenous cations on intrinsic potassium decreased as Ca 2+ > Na + > Cs + , which may have been caused by the different adsorption sites. These results provide new insight into the environmental effect of the excessive use of inorganic fertilizers and the leakage of radioactive waste in soils. Highlights• Increase in exogenous cations tended to promote the release of intrinsic potassium in illite.

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Section: Implications For the Interfacial Interactionssupporting

confidence: 85%

Section: Competition Between Exogenous Cations and Intrinsic Potassiu...supporting

confidence: 55%

Adsorption of cations at the illite–water interface and its effect on intrinsic potassium ions

Xing

Tang

et al. 2021

European J Soil Science

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“…It is worth noting that existing studies have shown that although the introduction of a positive charge can strengthen the attractive force on soil particles, this force is not stable [ 46 ]. If the particle size of soil aggregates increases, the acting distance will be increased and the acting force will be weakened.…”

Section: Resultsmentioning

confidence: 99%

“…Mean Weight Diameter Geometric Mean Diameter As shown in Table 5, compared with soil treated by original lignin, the MWD of soil treated by aminated lignin increased by 5.88%, and the value of GMD increased slightly by 2.90%. It is worth noting that existing studies have shown that although the introduction of a positive charge can strengthen the attractive force on soil particles, this force is not stable [46]. If the particle size of soil aggregates increases, the acting distance will be increased and the acting force will be weakened.…”

Section: Treatment Methodsmentioning

confidence: 97%

Effect of Aminating Lignin Loading with Arbuscular Mycorrhizal Fungi on Soil Aggregate Structure Improvement

Hu,

Xu,

Wang

et al. 2024

Polymers

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Lignin is an important component of plant fiber raw materials, and is a three-dimensional network structure aromatic polymer with abundant resources and a complex structure in nature. Lignin is generally used as industrial waste, and its potential value has not been fully utilized. Modern agriculture extensively uses chemical fertilizers, leading to the gradual degradation of soil fertility and structure, which seriously affects crop growth, nutrient transport, and root respiration function. Based on soil bulk density, porosity, aggregates, and their stability indicators, this study analyzed the effects of aminated industrial lignin and its loading with arbuscular mycorrhizal fungi on soil structure improvement and plant growth. It was hoped that resource-rich lignin could play a beneficial role in improving soil structure and promoting crop growth. The phenolic hydroxyl group of lignin was epoxidized and further aminated to load with arbuscular mycorrhizal fungi. The results indicated that amine-modified lignin could effectively load with arbuscular mycorrhizal fungi. The application of arbuscular mycorrhizal fungi-supported aminated lignin to soil aggregate structure improvement greatly reduced the bulk density of soil, and increased the porosity of soil and the content of large granular soil. Compared with unmodified soil, soil bulk density decreased by 73.08%, the porosity of soil increased by 70.43%, and the content of large granular soil increased by 56.38%. Using the improved soil for corn cultivation efficiently increased the biomass of corn. The plant height was increased by 72.16%, the root–shoot ratio was increased by 156.25%, and other indexes were also improved to varying degrees. The experimental method provides an important basis for the effective utilization of lignin materials in agriculture in the future.

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“…Soil aggregate stability is very important for improving the physical, biological and chemical properties of the soil (Nweke and Nnabude, 2015;Zaker and Emami, 2019). The soil structure depends to a great extent on the combination of clay particles with organic matter, this determines physical processes such as the selforganization, absorption, disposal and storage of soil water (Dexter et al, 2008;De-Jonge et al, 2009;Resurreccion et al, 2011;Farahani et al, 2019).…”

Section: Introductionmentioning

confidence: 99%

Assessment of the soil structure stability focusing on the high-energy moisture characteristic curve in pasture and arable land uses in semi-arid areas, northeastern Iran

Samaei,

Emami,

Lakzian

2023

Int. Agrophys.

Self Cite

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A b s t r a c t. Investigating the effects of land use on soil structure in order to prevent the ever-increasing risks of soil degradation is important. The objective of this study was to compare the stability of soil structure using different methods in pasture and arable land uses in northeastern Iran. Soil samples were collected from a depth of 0-20 cm at two sites including pasture and arable land uses. Soil structure stability was determined using tensile strength, soil friability and Dexter's number by focusing on the high-energy moisture characteristic curve procedure. The results showed that there were significant differences between the values of modal suction (p < 0.05), volume drainable pores, structural index and stability ratio, the aggregate stability index of the high-energy moisture characteristic curve method (p < 0.01), and Dexter's number (p < 0.01) in pasture and arable land uses. In addition, the difference (p < 0.01) between the values of particulate organic matter in both land uses was significant. In arable land use, stability ratio, particulate organic matter and clay were found to be 10.9, 41.7, and 4.9% less than in pasture land use, respectively, and Dexter's number was found to be 63.1% more than in pasture land use. Considering that the value of stability ratio in pasture land use (0.5345) was significantly greater than that in arable land use (0.4761) and the value of Dexter's in arable land use (122.68) was significantly greater than that in pasture land use (75.20), it may be concluded that the stability of the soil structure in pasture land use is greater than that in arable land use. Also, according to the results obtained, it may be asserted that the high-energy moisture characteristic curve method and Dexter's number are suitable methods for the evaluation of the stability of the soil structure in lands with similar characteristics to those of the study area used in this research.

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Effect of different K:Na ratios in soil on dispersive charge, cation exchange and zeta potential

Cited by 25 publications

References 35 publications

Adsorption of cations at the illite–water interface and its effect on intrinsic potassium ions

Adsorption of cations at the illite–water interface and its effect on intrinsic potassium ions

Effect of Aminating Lignin Loading with Arbuscular Mycorrhizal Fungi on Soil Aggregate Structure Improvement

Assessment of the soil structure stability focusing on the high-energy moisture characteristic curve in pasture and arable land uses in semi-arid areas, northeastern Iran

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