Effectiveness and potential mechanism of hydrothermal modification of attapulgite for cadmium passivation in soil

Ma, G.; Ren, J.; Tao, L.; Han, X.; Liao, C.; Zhou, Y.; Ding, J.; Zhou, Y.; Bi, K.

doi:10.1007/s13762-023-05124-z

Cited by 5 publications

(1 citation statement)

References 44 publications

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“…By means of adsorption, complexation, and precipitation, these oxides may interact with soil heavy metals and hence decrease their availability [ 3 ]. Attapulgite (ATP), a water-bearing magnesium-aluminosilicate clay mineral with a layered chain structure and a large specific surface area, demonstrates strong adsorption capacity and excellent thermal stability, which can reduce the concentrations and activities of heavy metal ions in soil by adsorption, coprecipitation, complexation, and coordination [ 4 ].…”

Section: Introductionmentioning

confidence: 99%

The Immobilization Mechanism of Inorganic Amendments on Cu and Cd in Polluted Paddy Soil in Short/Long Term

Liu,

Ding,

Lai

et al. 2024

Toxics

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This study investigated the impact of soil colloidal characteristics on the transfer patterns of different Cu and Cd speciation in contaminated soil treated with three different amendments: lime (L), zero-valent iron (ZVI), and attapulgite (ATP). It seeks to clarify the activation hazards and aging processes of these modifications on Cu and Cd. Compared with the control (CK), the available Cu concentrations treated with amendments reduced in the short term (6 months) by 96.49%, 5.54%, and 89.78%, respectively, and Cd declined by 55.43%, 32.31%, and 93.80%, respectively. Over a 12-year period, there was no significant change in the immobile effect with L, while Cu and Cd fell by 19.06% and 40.65% with ZVI and by 7.63% and 40.78% with ATP. Short- and long-term increases in the readily reducible iron and manganese oxide fraction of Cu and Cd were accompanied by a considerable rise in the concentrations of amorphous iron oxide in the soil and colloid after amendment treatment. This suggested that Cu and Cd were immobilized and stabilized in part by amorphous iron oxide.

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Section: Introductionmentioning

confidence: 99%