Kinetic modeling of antimony(III) oxidation and sorption in soils

Cai, Yaqi; Mi, Yuting; Zhang, Hua

doi:10.1016/j.jhazmat.2016.05.027

Cited by 34 publications

(14 citation statements)

References 46 publications

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“…In a naturally aerobic environment, many oxidizing substances may oxidize Sb(III) to Sb(V), which affects the mobility and removal of Sb [25,30]. In this study, the effects of KMnO 4 and aeration on the removal of Sb by coagulation with PFS of 10 mg•L −1 were investigated.…”

Section: Effects Of Oxidation On Sb Removalmentioning

confidence: 99%

An Effective Method to Remove Antimony in Water by Using Iron-Based Coagulants

Cheng¹,

Wang²,

Li³

et al. 2019

Water

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The effectiveness of antimony (Sb) removal by using iron-based coagulants was investigated in this study. The effects of pH, coagulant types and dose, equilibrium concentration, co-existing humic acid (HA) and anions, and oxidation process were studied. Effective Sb removal was achieved by using Fe(III)-based coagulants. However, the removal efficiency of Sb by using Fe(II)-based coagulants was very low. The removal capacity of Sb fitted the Sips adsorption isotherm well, which revealed that the heterogeneous adsorption process onto the formed hydrous ferric oxide played an important role in Sb removal, and the mechanism was further supported by Fourier transform infrared spectrum analysis. Sb removal was inhibited by the presence of HA and phosphate, as well as oxidation and aeration. Therefore, coagulation by using Fe(III)-based coagulants without oxidation is an effective and promising method for removing Sb in aqueous solution.

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Section: Effects Of Oxidation On Sb Removalmentioning

confidence: 99%

An Effective Method to Remove Antimony in Water by Using Iron-Based Coagulants

Cheng¹,

Wang²,

Li³

et al. 2019

Water

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“…Naturally occurring geochemical processes in mineral phases associated with rock, soils, and sediments of unsaturated zones and aquifers are directly linked with contamination levels and the migration of Sb in the soil and groundwater system [ 46 ]. Sb is usually adsorbed and desorbed in soil and groundwater and achieves valence transition through redox on the surface of soil particles [ 61 ]. The transformation of mobile forms of Sb is predominantly controlled by naturally occurring adsorption and precipitation processes.…”

Section: Resultsmentioning

confidence: 99%

Insight into the Adsorption Behaviors of Antimony onto Soils Using Multidisciplinary Characterization

2022

IJERPH

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Antimony (Sb) pollution in soils is an important environmental problem, and it is imperative to investigate the migration and transformation behavior of Sb in soils. The adsorption behaviors and interaction mechanisms of Sb in soils were studied using integrated characterization techniques and the batch equilibrium method. The results indicated that the adsorption kinetics and isotherms of Sb onto soils were well fitted by the first-order kinetic, Langmuir, and Freundlich models, respectively, while the maximum adsorbed amounts of Sb (III) in soil 1 and soil 2 were 1314.46 mg/kg and 1359.25 mg/kg, respectively, and those of Sb (V) in soil 1 and soil 2 were 415.65 mg/kg and 535.97 mg/kg, respectively. In addition, pH ranging from 4 to 10 had little effect on the adsorption behavior of Sb. Moreover, it was found that Sb was mainly present in the residue fractions, indicating that Sb had high geochemical stability in soils. SEM analysis indicated that the distribution positions of Sb were highly coincident with Ca, which was mainly due to the existence of calcium oxides, such as calcium carbonate and calcium hydroxide, that affected Sb adsorption, and further resulted in Sb and Ca bearing co-precipitation. XPS analysis revealed the valence state transformation of Sb (III) and Sb (V), suggesting that Fe/Mn oxides and reactive oxygen species (ROS) served as oxidant or reductant to promote the occurrence of the Sb redox reaction. Sb was mobile and leachable in soils and posed a significant threat to surface soils, organisms, and groundwater. This work provides a fundamental understanding of Sb adsorption onto soils, as well as a theoretical guide for studies on the adsorption and migration behavior of Sb in soils.

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“…In this study, the acute toxicity thresholds for Sb to DHA in the soil, ED 10 values based on water‐soluble Sb were 3.4–360 mg kg −1 . Soil physicochemical properties played a prominent part in the mobility and transformation of Sb so that invariably affected the ED 10 of Sb for DHA (Cai et al., 2016). Several researchers have found that high organic matter (OM), amorphous Fe, and aluminium contents in soil facilitate the transformation of trivalent Sb to pentavalent, reducing the toxicity because the pentavalent Sb is less toxic than that of trivalent Sb (Belzile et al., 2001; He et al., 2019; Lin et al., 2019).…”

Section: Discussionmentioning

confidence: 99%

Toxicity of antimony in 18 soils of China evaluated by soil dehydrogenase activity

Tian

Liao

et al. 2022

Soil Science Soc of Amer J

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Antimony (Sb) contamination has attracted global attention due to the elevated Sb entering the environment and threatening human health. Dehydrogenase activity (DHA) has been used as a sensitive bioindicator to assess Sb toxicity. However, only total Sb content and a few types of soils were used so far, which ignored the effect of Sb adsorption characteristics and soil heterogeneity in the Sb toxicity assessment. This study used 18 soil samples varying in their properties to explore the Sb adsorption behavior and the subsequent effects on Sb toxicity using DHA as an indicator. The adsorption isotherm parameters of Sb in 18 soils showed that acidic and neutral soils favored Sb adsorption (n a > 2) over alkaline soils (1 < n a < 2), and the adsorption process tended to be irreversible (R L close to 0). The solid binding force (k L ) of Sb to alkaline soils is less than that of acidic and neutral soils; therefore, alkaline soils pose a higher risk of secondary pollution. Variation partitioning analysis showed that water-soluble Sb was the predominant factor responsible for the observed decrease in DHA. Ecological doses (ED 10 ) based on water-soluble Sb fluctuated from 3.4 to 360 mg kg −1 in soils. Soil properties, such as pH, total phosphorus, amorphous Fe, and clay content, played a crucial role in Sb toxicity to DHA. This study highlighted the importance of water-soluble Sb while evaluating the Sb toxicity in soils.Thus, the study is useful in risk assessment and remediation of Sb-contaminated soils.

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Kinetic modeling of antimony(III) oxidation and sorption in soils

Cited by 34 publications

References 46 publications

An Effective Method to Remove Antimony in Water by Using Iron-Based Coagulants

An Effective Method to Remove Antimony in Water by Using Iron-Based Coagulants

Insight into the Adsorption Behaviors of Antimony onto Soils Using Multidisciplinary Characterization

Toxicity of antimony in 18 soils of China evaluated by soil dehydrogenase activity

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