Effect of pH on Zinc Sorption–Desorption by Soils

Singh, Dhanwinder; McLaren, R. G.; Cameron, K. C.

doi:10.1080/00103620802432873

Cited by 19 publications

(11 citation statements)

References 26 publications

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“…They found that the adsorption isotherms of Cu were similar to L-or H-type curves, suggesting that a high affinity exists between the Cu and the soil, especially at low solution concentrations. Singh et al (2008) determined the effect of pH on Zn sorption and desorption on four New Zealand soils and reported that three out four of the soils studied had L-or H-type curves.…”

Section: Adsorption Of Cu and Zn In The Peat Soilsmentioning

confidence: 99%

Adsorption and desorption of copper and zinc in tropical peat soils of Sarawak, Malaysia

et al. 2012

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Section: Adsorption Of Cu and Zn In The Peat Soilsmentioning

confidence: 99%

Adsorption and desorption of copper and zinc in tropical peat soils of Sarawak, Malaysia

et al. 2012

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“…Phosphorus sorption on Fe and Al-oxides surface enhanced negative charge and increases Zn sorption (Bolland et al 1977). The adsorptiondesorption reactions at various pH and Zn contents mainly determined Zn concentration in equilibrium solution with clay fractions of soils (Singh et al 2008). The studies on Zn sorption in soils with differential P content and P and Zn application are scarce.…”

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confidence: 99%

Zinc sorption characteristics and release kinetics from soils with long-term zinc and phosphorus application

2020

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We investigated the effect of long-term phosphorus (P) and zinc (Zn) application in three soils (Soil-I, Soil-II and Soil-III) with differential P content on Zn sorption and release kinetics to understand the underlying mechanism controlling Zn sorption-desorption reactions. Zn sorption was highest in soil-III (54.4-96.4% of added Zn), and was the lowest in soil-I (44.1-94.3% of added Zn) in no-P applied soils. In soil-III, 60.6-97.6% of applied Zn gets sorbed on soil colloidal complex with P application at 100 mg P kg-1, which was 1.2-11.4% higher at differential levels of Zn application. Results showed that Langmuir sorption maxima (b) and Freundlichâ€™s adsorptive capacity (Y) were lowest for soil-I without P application and was the highest in soil-III with P application. These results suggests that soil-III with P application at 100 mg P kg-1 with highest Zn sorption had the lowest Zn release capacity. Further, these results showed that Elovich equation best described the kinetics of Zn release from three soils with highest value of coefficient of determination (R2=0.93-0.98*, p<0.05) and lowest standard error (S.E.= 0.172-0.256).

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“…Zinc sorption and desorption is generally linked to soil pH. Under low pH, sorbed zinc can be desorbed back into the soil solution, thus enhancing the availability of soil zinc (Singh et al 2008). Longterm fertilization results in a decrease in soil pH, whether soil zinc availability increases or not (Guo et al 2010, Guo andWang 2013).…”

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confidence: 99%

Occlusive effect of soil aggregates on increased soil DTPA-extractable zinc under low soil pH causedby long-term fertilization

Guo¹,

Guo²,

Wang³

et al. 2013

PLANT SOIL ENVIRON

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To investigate the effect of low soil pH caused by fertilization on soil available zinc in calcareous soil, this study was conducted based on a long-term experiment consisting of: (a) no fertilization (CT); (b) mineral fertilizer application coupled with 7500 kg/ha of wheat straw (WS-NPK); (c) mineral fertilizer application coupled with 3750 kg/ha of wheat straw (1/2WS-NPK); (d) mineral fertilizer application alone (NPK). Long-term fertilization results in a significant increase in soil DTPA-extractable zinc. However, the increased soil DTPA-extractable zinc is unavailable to crops and mainly confined to 0.25 mm > and 0.25 mm to 1 mm aggregates. Compared to CT, soil DTPA-extractable zinc under fertilization is more than 9.67% and 122.36% higher in 0.25 mm > and 0.25 mm to 1 mm aggregates, respectively. Furthermore, plant-available zinc in the 0-15 cm soil layer and wheat grain zinc are both significantly positive related to soil DTPA-extractable zinc in > 2 mm aggregates. Therefore, plant-available zinc in the 0-15 cm layer is closely associated with DTPA-extractable zinc in > 2 mm aggregates, and the low soil pH caused by longterm fertilization could not enhance plant-available zinc in the surface soil layer nor elevate wheat grain zinc concentration because of the occlusive effect of soil aggregates.

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Effect of pH on Zinc Sorption–Desorption by Soils

Cited by 19 publications

References 26 publications

Adsorption and desorption of copper and zinc in tropical peat soils of Sarawak, Malaysia

Adsorption and desorption of copper and zinc in tropical peat soils of Sarawak, Malaysia

Zinc sorption characteristics and release kinetics from soils with long-term zinc and phosphorus application

Occlusive effect of soil aggregates on increased soil DTPA-extractable zinc under low soil pH causedby long-term fertilization

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