Bio-organic stabilizing agent shows promising prospect for the stabilization of cadmium in contaminated farmland soil

Xiong, Zhenqian; Zhang, Junqing; Cai, Peng; Chen, Wenli; Huang, Qiaoyun

doi:10.1007/s11356-019-05619-8

Cited by 24 publications

(8 citation statements)

References 37 publications

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“…S4 ). The amounts of chemical agents were set according to our previous studies on the stabilization of Cd-contaminated agriculture soil ( 55 , 56 ).…”

Section: Methodsmentioning

confidence: 99%

“…The mixture of HF-HClO 4 -HNO 3 was used to digest soil for the determination of total Cd content ( 57 ). Cd speciation was determined using the sequential extraction procedure reported by Tessier with a modification ( 55 , 59 ). Briefly, the selected extracts were obtained by shaking 2.0 g of soil samples with the following reagents, separately: 20 ml double-distilled water (ddH 2 O) (pH 7.0) for the water-soluble Cd (WS-Cd); 20 ml of 1 M MgCl 2 (pH 7.0) for the exchangeable Cd (E-Cd); 20 ml of 1 M NaOAc (pH 5.0) for the carbonate-bound Cd (CA-Cd); 40 ml of 1 M Na 4 P 2 O 7 ·10H 2 O (pH 10.0) for the humic acid-bound Cd (HS-Cd); 40 ml of 0.25 M NH 2 OH-HCl for the iron-manganese oxide-bound Cd (Fe-MnOx-Cd); 40 ml of the mixtures of 0.02 M HNO 3 , 30% H 2 O 2 , and 3.2 M NH 4 OAc-HNO 3 for the strong organic-bound Cd (SO-Cd); and 20 ml HNO 3 -HCl-HClO 4 for the residual Cd (RES-Cd).…”

Section: Methodsmentioning

confidence: 99%

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Distinct Responses of Rare and Abundant Microbial Taxa to In Situ Chemical Stabilization of Cadmium-Contaminated Soil

Huang

Xiong

et al. 2021

mSystems

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Understanding the ecological roles of rare and abundant species in the restoration of soil ecosystem functions is crucial to remediation of heavy metal-polluted soil. Our study assessed the efficiencies of five commonly used soil amendments on recovery of ecosystem multifunctionality and emphasized the relative contributions of rare and abundant microbial communities to ecosystem multifunctionality.

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“…S4 ). The amounts of chemical agents were set according to our previous studies on the stabilization of Cd-contaminated agriculture soil ( 55 , 56 ).…”

Section: Methodsmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

Distinct Responses of Rare and Abundant Microbial Taxa to In Situ Chemical Stabilization of Cadmium-Contaminated Soil

Huang

Xiong

et al. 2021

mSystems

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“…4). Similarly, Liu et al (2022) as well as Xiong et al (2019) revealed that biochar and biocharcompost lowered the Ex-Cd while increased other Cd fractions. The potential explanation for reduction of DTPA-Cd in soil by biochar-based amendments could be explained as that biochar-based amendments contained alkaline particles and produced OH − groups that could bind Cd ions from soil solution to form insoluble complexes, thus reducing Cd bioavailability.…”

Section: Effect On Soil Properties and CD Fractionmentioning

confidence: 79%

Impacts of biochar-based amendment on soil cadmium immobilization, rice grain cadmium accumulation and yield

Han,

Wu,

Yang

et al. 2024

Preprint

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Cadmium (Cd) contamination in soil is of severe health and environmental concern because of its threat to human health, food safety, and ecosystem sustainability. The in situ stabilization of Cd has been recognized as a potentially economical technique for the rehabilitation of soil polluted with Cd. Biochar has recently received much attention as an eco-friendly and recyclable soil amendment, which is more beneficial for plant growth, soil health, and restoration of contaminated soil. An experiment was performed in the field to study the efficiency of three different types of biochar: maize straw biochar, bamboo biochar, and coconut shell activated carbon in combination with rape organic fertilizer (ROF), calcium magnesium phosphate fertilizer (CMPF), and fulvic acid (MFA), respectively, on soil Cd immobilization, Cd uptake by rice, and rice yield. The experiment indicated that the biochar-based amendments reduced soil Cd bioavailability and rice Cd content by 9.58%-27.06% and 19.30%-71.77%, respectively. The transformation of exchangeable Cd (Ex-Cd) to carbonate bound Cd (Ca-Cd), Fe-Mn oxide bond (Ox-Cd), and residual (Re-Cd) in soil accounted for the mitigation of Cd absorption and enrichment by rice. In addition, the biochar-based amendments altered soil physicochemical properties and promoted soil health. Biochar-based amendments enhanced Fe and Mn plaques by 47.31%-160.34% and 25.72%-73.09%, respectively. The correlation analysis revealed that leaf Cd and Fe/Mn plaques primarily controlled Cd uptake by rice, and soil pH, Eh, CEC, SOC, Fe/Mn plaques, and TP influenced Cd bioavailability in soil. This field study demonstrated that maize straw and bamboo biochar-based amendments had a higher benefit and were potentially applicable to ameliorating metal-contaminated agricultural soil.

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“…Soil pH, NH 4 + -N, NO 3 - -N, SOM, AP, total carbon (TC), total N (TN), total Cd concentrations, and Cd accumulation in soybean were measured according to the methods described in our previous studies ( 33 , 39 ). Cd speciation was measured using the improved Tessier extraction procedures according to a previous protocol ( 40 ), including water-soluble Cd, exchangeable Cd, carbonate bound Cd, iron-manganese oxide bound Cd, organic bound Cd, and residual Cd. The Cd concentrations were measured using inductively coupled plasma mass spectrometry (ICP-MS, PerkinElmer Nexlon300X, USA).…”

Section: Methodsmentioning

confidence: 99%

Enhanced soil function and health by soybean root microbial communities during in situ remediation of Cd-contaminated soil with the application of soil amendments

Cheng

Chen

et al. 2023

mSystems

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The interactions between soil microbiomes at various trophic levels are essential for restoring soil functions. Legumes are considered as “pioneer crops” in degraded or contaminated soils because they can fix nitrogen through symbiotic relationships with rhizobacteria, which promotes soil fertility. However, little is known about the abilities of legumes to contribute to the health of soil contaminated with Cadmium (Cd). In this research, we applied a soil amendment (commercial Mg-Ca-Si Conditioner, CMC) at two rates (1,500 and 3,000 kg ha -1 ) in a Cd-contaminated soybean field. Bulk and rhizosphere soil samples were collected to assess the amendment-induced effects on four microbial lineages (bacteria, fungi, AMF, and nematodes) and their soil functions including cadmium stabilization, nutrient cycling, and pathogen control. Compared with the control, both CMC application rates increased the pH and reduced labile Cd fraction in the bulk and rhizosphere soils. Although the total Cd concentrations in the soil were similar, the Cd accumulation in the grains was significantly reduced in treatments of soil amendments. It was observed that application of CMC can significantly reduce the AMF diversity, but increase the diversity of other three communities. Moreover, the biodiversity within keystone modules (identified by co-occurrence network analysis) played key roles in driving soil multifunctionality. Specifically, key beneficial groups in module 2 such as Aggregicoccus (Bacteria), Sordariomycetes (Fungi), Glomus (AMF), and Bursaphelenchus (Nematode) were strongly associated with soil multifunctionality. By co-culturing bacterial suspensions with the soybean root rot pathogen Fusarium solani in the in vitro assays, we experimentally validated that application of CMC promoted the suppression of soil bacterial community on pathogens by inhibiting the mycelium growth and spore germination. Also, the bacterial community was more resistant to Cd stress in soils receiving CMC amendment. Our findings provide valuable theoretical references for enhancing soil functions and health via applying a soil amendment (CMC) during Cd-contaminated soil remediation. IMPORTANCE Restoration of microbiome-driven soil functions and health is of great importance during Cd-contaminated soil remediation via soil amendment. Soybean and its symbiotic mutualism can provide abundant nitrogen (N) and phosphorus ( P ) to relieve nutrient deficiency of Cd-contaminated soil. This study provides a novel perspective on the potential role of applying a soil amendment (CMC) in enhancing the functions and health of Cd-contaminated soils. Our results showed the distinct differences in soil microbial community responding to amendment-induced changes in edaphic properties. The biodiversity within keystone modules had major contributions to the maintenance of the soil multifunctionality and health. Additionally, higher CMC application rate showed more beneficial effects. Collectively, our results enhance our understanding about the effects of applying CMC, together with soybean rotation, to enhance and maintain soil functions and health during the field Cd stabilization process.

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Bio-organic stabilizing agent shows promising prospect for the stabilization of cadmium in contaminated farmland soil

Cited by 24 publications

References 37 publications

Distinct Responses of Rare and Abundant Microbial Taxa to In Situ Chemical Stabilization of Cadmium-Contaminated Soil

Distinct Responses of Rare and Abundant Microbial Taxa to In Situ Chemical Stabilization of Cadmium-Contaminated Soil

Impacts of biochar-based amendment on soil cadmium immobilization, rice grain cadmium accumulation and yield

Enhanced soil function and health by soybean root microbial communities during in situ remediation of Cd-contaminated soil with the application of soil amendments

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