Measurement and modeling of surface charge and cation binding in agricultural soil

Taillon, K.; Hendershot, William H.

doi:10.4141/cjss07076

Cited by 3 publications

(3 citation statements)

References 33 publications

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“…Fluxes of Zn and Cd from the ionic exchange membranes were decreased by lime addition, whereas fluxes of Mo were increased. Thus, for these metals, their solubility was directly affected by soil pH [r00.71 to 0.76, P B0.01 (Kabata-Pendias 2001)], and the free ion forms were more prevalent, as opposed to Cu where almost all of the Cu added to soil is bound by the soil solid phase and the remaining in-soil solution is bound to dissolved organic C or other ligands (Taillon and Hendershot 2008). The same trends were observed with water extraction, but only for Zn and Mo.…”

Section: Soil Metals Availabilitymentioning

confidence: 99%

Environmental impact of repeated applications of combined paper mill biosolids in silage corn production

Gagnon¹,

Ziadi²,

Côté³

et al. 2010

Can. J. Soil. Sci.

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Paper mill biosolids (PB) may provide benefits for crop yields and soil nutrients. However, few data are available on metal accumulation and pathogenic populations resulting from applications in silage corn production. A study was initiated to determine the effect of annual spring application of combined PB during 3 consecutive years, with or without calcitic lime, on yield and on the environmental risk posed by N, P, heavy metals (Cu, Zn, Cd, Mo) and Escherichia coli to a silage corn cropped in a loamy sand in eastern Ontario, Canada. Treatments consisted of complete mineral NPK fertilization (PB0), 30 Mg wet weight ha-1 with supplemental N and K, and 60 and 120 Mg wet ha-1 supplemented with K, either with or without 2.5 Mg ha-1 calcitic lime. The PB at 30 Mg wet ha-1 with reduced mineral N and PB at 60 Mg wet ha-1 provided comparable yields to the mineral N fertilization in all years, whereas application of PB at 120 Mg wet ha-1 increased corn yield by 6.0 Mg ha-1 in the third year. After 3 yr, contents of soil NO3-N and the P saturation index (P/Al) were increased, indicating a possible risk of nitrate and P leaching. Lime increased soil pH by 0.8 unit, which in turn caused a large increase in the tissue Mo concentration and Mo uptake by silage corn. The PB, particularly at 120 Mg wet ha-1, produced significant accumulations of Cd and Zn in soil, plant tissue and uptake. The PB showed small counts of E. coli, and consequently very little contamination was observed in the soil and on the harvested crop. Based on these results, the PB used are a good source of nutrients that benefits silage corn yields and represent as well a low risk for human and animal health and for the environment when the application does not exceed 60 Mg wet ha-1 yr-1.Key words: Zea mays L., paper mill biosolids, lime, heavy metals, cadmium, molybdenum, Escherichia coli

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Section: Soil Metals Availabilitymentioning

confidence: 99%

Environmental impact of repeated applications of combined paper mill biosolids in silage corn production

Gagnon¹,

Ziadi²,

Côté³

et al. 2010

Can. J. Soil. Sci.

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“…The variable charge Si‐OH produced by the original saline‐alkali soil mainly comes from the variable charge produced by 2:1 type minerals (Phillips & Sheehan, 2005). After the addition of AHA, a large amount of Ca 2+ is introduced, and Ca 2+ will exchange exchangeable cations on the mineral surface, so the surface charge and variable negative charge of clay particles increase (Taillon & Hendershot, 2008).…”

Section: Discussionmentioning

confidence: 99%

“…Sheehan, 2005). After the addition of AHA, a large amount of Ca 2+ is introduced, and Ca 2+ will exchange exchangeable cations on the mineral surface, so the surface charge and variable negative charge of clay particles increase (Taillon & Hendershot, 2008).…”

Section: Effect Of 3% Aha Addition On Soil Colloid Surface Charge In ...mentioning

confidence: 99%

Effect of alkali residue and humic acid on aggregate structure of saline‐alkali soil

Liu,

Shang,

Han

et al. 2024

Soil Science Soc of Amer J

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Humic acid (HA) and alkali residue (AR) exert an essential impact on soil aggregate structure, but how HA and AR promote the formation of macroaggregates jointly is not clear. The aim of this research was to explore influence of alkali residue and humic acid (AHA) on the structure and stability of soil aggregates, with saline‐alkali soil in North China as an example. The morphology and structure of the soil with AHA added were detected by a scanning electron microscope, Fourier transform infrared spectroscopy, and X‐ray diffraction. Soil aggregate structure was analyzed by mean weight diameter (MWD), geometric mean diameter (GMD), and fractal dimension (D), and the trend of soil colloid forming macroaggregates was evaluated by zeta potential and surface charge. The results showed that under dry and wet sieves, MWD and GMD both surged initially and then decreased with the rise of AHA content, while D had the opposite trend. With the addition of 3%, AHA, MWD, and GMD reached their peak which proves that the proportion of soil macroaggregates was the highest. In the meantime, absolute value of zeta potential was low, which illustrates that the soil colloid system was in an unstable state of condensation and microaggregates tend to transform into macroaggregates. A large number of ions such as Ca2+ and Mg2+ in AHA promoted variable charge of saline‐alkali soil, and the binding frequency of Ca2+ with negatively charged humus and soil colloid particles was increased. AHA holds great promise for improving the aggregate structure of saline‐alkali soil.

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Effect of Calcium and pH on Copper Binding and Rhizotoxicity to Pea (Pisum sativum L.) Root: Empirical Relationships and Modeling

Hendershot

2010

Arch Environ Contam Toxicol

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The accumulation and toxicity of Cu to pea (Pisum sativum L.) roots were investigated. The root uptake of Cu and Ca varied with Ca and H activities. Calcium, H, and Cu competed for root binding with high pH and low Ca favoring more Cu uptake. Root elongation was highly sensitive to root Ca content and correlated better with root-bound Ca and Cu content than with merely dissolved Cu concentrations. The prediction of root elongation needs to include both the root-bond Cu and Ca as predictor variables whenever environmental conditions (low pH and low Ca) decrease Ca accumulation. A multielement uptake model was developed to describe Cu and Ca accumulation by treating the pea roots as a collection of three biotic ligands with known site densities (Q(L)(j)) and proton-binding constants (K(HL)(j)). A series of binding constants were derived. The log K(CuL)(j) (j = 1, 2, 3) values were estimated at pH 6 and 0.2 mM CaCl(2) as 2.36, 4.36, and 0.32, respectively. The derived formation constants can be incorporated into standard solution speciation models to estimate the bioaccumulation of Cu in plant roots under multielement conditions.

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Measurement and modeling of surface charge and cation binding in agricultural soil

Cited by 3 publications

References 33 publications

Environmental impact of repeated applications of combined paper mill biosolids in silage corn production

Environmental impact of repeated applications of combined paper mill biosolids in silage corn production

Effect of alkali residue and humic acid on aggregate structure of saline‐alkali soil

Effect of Calcium and pH on Copper Binding and Rhizotoxicity to Pea (Pisum sativum L.) Root: Empirical Relationships and Modeling

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