Thermodynamic characteristics and mechanisms of heavy metals adsorbed onto urban soil

Li, Yue‐Ming; Kang, Chao; Chen, Weiwei; Ming, Lian; Zhang, Sai

doi:10.1007/s40242-013-2200-1

Cited by 7 publications

(4 citation statements)

References 14 publications

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“…Contrastingly, it also dictates the potential for leaching (or flushing) and the bioavailability (or mobility) of the metal to plants and other biota. Authors are still debating which sediment characteristics are the most important determinant of the element's form (Kabata-Pendias, 2011), however, pH, carbonates and Fe and Mn oxides greatly influence the behavior of chemical elements (Shine et al, 1995;Li et al, 2013). Others suggest that it is pH, redox potential and organic matter that are the most important in sediments (Hermann and Neumannmahlkau, 1985;Strawn and Sparks, 2000).…”

Section: Discussionmentioning

confidence: 99%

“…Acidity increases the mobility of cationic metals-creating conditions conducive to the leaching of these metals into the water column (Williams et al, 1994). It is due to the adsorption and desorption mechanisms onto sediment surfaces that are largely controlled by pH (Li et al, 2013). However, Eh (redox potential) also has an important relationship with metal mobility, and in cases where pH is alkaline and Eh is highly positive, metals can become immobile before reverting to a mobile anionic metal species (Hermann and Neumannmahlkau, 1985;Kabata-Pendias, 2011).…”

Section: Discussionmentioning

confidence: 99%

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Rhizosediments of Salicornia tegetaria Indicate Metal Contamination in the Intertidal Estuary Zone

Nel

Rubidge

Adams

et al. 2020

Front. Environ. Sci.

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Metal pollution is a well-known anthropogenic impact of highly developed estuaries, with dire consequences to the ecosystem. This study investigated the metal concentrations (Al, Cr, Cu, Fe, Mn, Ni, Pb, Zn) in the sediment colonized by Salicornia tegetaria, a dominant salt marsh plant in the lower intertidal zone of the Swartkops Estuary. The samples were collected at five sites along the banks of the middle and lower reaches of the estuary, and analyzed using an Inductively Coupled Plasma-Optical Emission Spectrometer. Metal contamination was determined using established normalized baseline models. It was found that all the sites contained metal enrichment, with the estuary mouth experiencing the least enrichment. Salicornia tegetaria holds a substantial amount of anomalous metals within its rhizosediment-providing a valuable ecosystem service to a highly developed Swartkops Estuary.

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Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

Rhizosediments of Salicornia tegetaria Indicate Metal Contamination in the Intertidal Estuary Zone

Nel

Rubidge

Adams

et al. 2020

Front. Environ. Sci.

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“…Wen, X., Wang, T. T., Chen, W. W., Li, Y. M., and Guo, P. 2013. Adsorption of DDT in soil using a single and combined effect of cadmium and Tween 80.…”

Section: Discussionmentioning

confidence: 99%

“…In order to investigate the role of Cl -on the adsorption of Tween 80 to soil in the CdCl 2 - Some studies show that special adsorption, as one of important adsorption mechanism of Cd 2+ on soil (Li et al 2013), is based on adsorption reactions of hydroxyl groups at the soil surfaces (Bradl 2004;Kinniburgh et al 1976). These results thus conclude that the competition of hydroxyl groups at soil surface between Cd 2+ and Tween 80, or the strong adsorption of Cd 2+ on the polar surface containing hydroxyl groups and the resulting displacement of the Tween 80 molecules, can lead to the decrease in Tween 80 adsorption in presence of Cd 2+ (Nevskaia et al 1998), and this effect is more obvious as the concentration of Cd 2+ increases.…”

Section: Effect Of Anion On the Adsorption Of Tween 80 To Soilmentioning

confidence: 99%

Adsorption Behavior of Tween 80 on Soil in the Presence of CdCl₂and DDT

Ming

Lin

Zhang

et al. 2015

Soil and Sediment Contamination: An International Journal

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Batch experiments were conducted to investigate the adsorption behavior of Tween 80 in the systems composed of Tween 80, CdCl 2 , and/or DDT. Results show that Cd 2+ from CdCl 2 is the functional fraction influencing the adsorption of Tween 80 to soil, rather than Cl -.Moreover, DDT can induce the increase of the critical micelle concentration (CMC) of Tween 80, which further impacts the Tween 80 adsorption behavior. The Tween 80 adsorption to soil in the Cd 2+ -DDT coexisted system follows the Langmuir isotherm, same as in the Tween 80-Cd 2+ or -DDT systems. Cd 2+ and/or DDT decrease(s) the adsorption capacity of Tween 80 to soil, and the magnitude of decrease is dependent on the concentration of coexisting pollutants. Although DDT has a stronger inhibitory effect on Tween 80 adsorption than Cd 2+ under the same DDT/Cd 2+ concentrations, the coexistence of Cd 2+ and DDT has an antagonistic effect on the adsorption of Tween 80. This effect is affected by the concentrations of the coexisted pollutants, and is a result of the complex interaction among the three pollutants.

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Removal of Ni and Cd ions from aqueous solution using iron dust-zeolite composite: Analysis by thermodynamic, kinetic and isotherm studies

Abadeh

Irannajad

2017

Chem. Res. Chin. Univ.

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Thermodynamic characteristics and mechanisms of heavy metals adsorbed onto urban soil

Cited by 7 publications

References 14 publications

Rhizosediments of Salicornia tegetaria Indicate Metal Contamination in the Intertidal Estuary Zone

Rhizosediments of Salicornia tegetaria Indicate Metal Contamination in the Intertidal Estuary Zone

Adsorption Behavior of Tween 80 on Soil in the Presence of CdCl₂and DDT

Removal of Ni and Cd ions from aqueous solution using iron dust-zeolite composite: Analysis by thermodynamic, kinetic and isotherm studies

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Thermodynamic characteristics and mechanisms of heavy metals adsorbed onto urban soil

Cited by 7 publications

References 14 publications

Rhizosediments of Salicornia tegetaria Indicate Metal Contamination in the Intertidal Estuary Zone

Rhizosediments of Salicornia tegetaria Indicate Metal Contamination in the Intertidal Estuary Zone

Adsorption Behavior of Tween 80 on Soil in the Presence of CdCl2and DDT

Removal of Ni and Cd ions from aqueous solution using iron dust-zeolite composite: Analysis by thermodynamic, kinetic and isotherm studies

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Adsorption Behavior of Tween 80 on Soil in the Presence of CdCl₂and DDT