Effects of Passivating Agents on the Availability of Cd and Pb and Microbial Community Function in a Contaminated Acidic Soil

Zhang, Di; Ding, Aifang

doi:10.1007/s00128-019-02592-3

Cited by 17 publications

(10 citation statements)

References 25 publications

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“…In general, Cd concentration is highest in the 0 -20 cm soil layer. Studies have also shown that modifiers can passivate toxic metals in soil [48]. In this study, the addition of modifiers had no significant effect on total Cd concentration, but significantly decreased the available Cd concentration, decreased the mobility of Cd, weakened the ability of Cd to migrate downward, and decreased the leaching of Cd into groundwater.…”

Section: Soil Fourier Transform Infrared Spectroscopy (Ftir) Test Analysismentioning

confidence: 53%

Cadmium Distribution and Migration as Influenced by Polymer Modifiers in a Loam Soil

An¹,

Hong²,

Chang³

et al. 2020

Rev. Chim.

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This paper studies the influence of four modifiers (organic-inorganic composite modifiers, inorganic polymer compound modifiers, polyacrylate compound modifiers, organic polymer compound modifiers) on soil pH, cation exchange capacity (CEC), Cd concentration and their distribution and migration in the soil profile under high Cd concentration (40 mg/kg) during continuous remediation tub experiment. The results showed that: (1) Four modifiers significantly increased the pH and CEC in each soil layer, and inorganic polymer compound modifiers providing the best results in the 0 �20 cm soil layer. (2) There is an extremely significant negative correlation between the carbonate-bound Cd and exchangeable Cd, with considerable effect in the 0 �20 cm and 20 �40 cm soil layers. The inorganic polymer compound modifiers had the best effect on the soil exchangeable Cd. (3) Both pH and CEC in all soil layers were negatively correlated with exchangeable Cd and positively correlated with other forms. (4) Fourier transform infrared spectrometry (FTIR) analysis showed that the modifiers immobilize soil Cd mainly through chemical precipitation, complexation and adsorption so as to reduce the bioavailability of Cd. Thus, we concluded that four modifiers are suitable for Cd mediation/Cd stabilization purposes.

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Section: Soil Fourier Transform Infrared Spectroscopy (Ftir) Test Analysismentioning

confidence: 53%

Cadmium Distribution and Migration as Influenced by Polymer Modifiers in a Loam Soil

An¹,

Hong²,

Chang³

et al. 2020

Rev. Chim.

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“…The bentonite was modied to obtain thiol-functionalized bentonite, and the specic modication method was described in a previous study. 13 The biochar was derived from rice straw that was prepared according to Zhang et al 18…”

Section: Soil Characteristics and Soil Amendmentsmentioning

confidence: 99%

“…7,11,12 Specically, our previous study reported that the combined use of hydroxyapatite, bentonite and biochar (HTB) was more effective for the immobilization of Cd and Pb than the application of the three amendments alone. 13 However, a successful immobilization remediation technique must maintain reasonably low bioavailability of heavy metals and improve soil ecological function with universality and long-term effects. 14 Soil microbes play an important role in ecosystem functions and they are especially susceptible and respond rapidly to changes in the soil environment.…”

Section: Introductionmentioning

confidence: 99%

Effects of an additive (hydroxyapatite–bentonite–biochar) on Cd and Pb stabilization and microbial community composition in contaminated vegetable soil

Zhang

Ding

et al. 2021

RSC Adv.

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“…Hydrated lime, as the most widely adopted amendment, can reduce heavy metal solubility and increase metal sorption to the soil by increasing soil pH, resulting in a reduction in metal bioavailability and a decrease in metal uptake by crops [4,6]. Organic materials have plenty of biochars, the reactive groups of biochar can provide large areas and high porosities to ameliorate the toxicity of heavy metal fractions [7][8]. Compared to other organic materials, biochar is attractive in quality and inexpensive to remediate heavy metal contamination; however, the immobilizing effect depended on soil conditions, such as CEC and pH [9][10].…”

Section: Introductionmentioning

confidence: 99%

Effects of Passivators on <i>Artemisia selengensis</i> Yield and Cd Stabilization in a Contaminated Soil

Zhang¹,

Ding²,

Li³

et al. 2021

Pol. J. Environ. Stud.

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Cadmium (Cd) contamination in agricultural soils has caused serious environmental risks and public health concern; possible eco-friendly immobilization technologies are required to reduce Cd accumulation. A set of pot experiments was carried out with two genotypes of Artemisia selengensis grown in a Cd-contaminated soil, which was amended with hydrated lime (L), diatomite (D) and biochar (B), either alone or in combination, to investigate the impacts of these passivators on bioavailability and mobility of Cd in soil and crops. The results demonstrated that hydrated lime and diatomite significantly promoted the immobilization of soil Cd and decreased the accumulation of Cd in Artemisia selengensis, and biochar significantly increased Artemisia selengensis yield. The residual fraction of Cd was increased 1.35~1.51 times for Fuqiu Artemisia selengensis and 0.97~1.05 times for Dayeqing Artemisia selengensis, respectively, under the hydrated lime (L) and hydrated lime+diatomite+biochar (LDB) treatments. Correspondingly, Artemisia selengensis yields were increased by 44.45%~52.50% and 37.91%~43.36%, respectively, in the treatments of biochar (B) and combination amendment (LDB). The results indicate that combination passivators (LDB) are recommended in practical applications, given their high efficiency for soil remediation and potential benefits. Fuqiu Artemisia selengensis, rather than Dayeqing Artemisia selengensis, are suggested to be employed for plants in mildly Cd-contaminated soil to ensure vegetable safety. These findings provide stronger evidence and theoretical support for in situ remediation of Cd-contaminated soil.

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Effects of Passivating Agents on the Availability of Cd and Pb and Microbial Community Function in a Contaminated Acidic Soil

Cited by 17 publications

References 25 publications

Cadmium Distribution and Migration as Influenced by Polymer Modifiers in a Loam Soil

Cadmium Distribution and Migration as Influenced by Polymer Modifiers in a Loam Soil

Effects of an additive (hydroxyapatite–bentonite–biochar) on Cd and Pb stabilization and microbial community composition in contaminated vegetable soil

Effects of Passivators on <i>Artemisia selengensis</i> Yield and Cd Stabilization in a Contaminated Soil

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