Effect of rice straw biochar on three different levels of Cd-contaminated soils: Cd availability, soil properties, and microbial communities

Xu, Meili; Dai, Weijie; Zhao, Zilin; Zheng, Jiatong; Huang, Fei; Mei, Chuang; Huang, Shuting; Liu, Chufan; Wang, Peng; Xiao, Rongbo

doi:10.1016/j.chemosphere.2022.134551

Cited by 35 publications

(13 citation statements)

References 52 publications

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“…When assessing the reduction efficiency in these two soil types, UGW450 exhibited a markedly more significant reduction in the bioavailable Cd in the Jiyuan soil relative to the Yunfu soil. This observation is in agreement with the findings by Xu et al [ 23 ], who reported that the addition of biochar to agricultural soils demonstrated higher efficiency in medium and heavily Cd-contaminated soil than in lightly Cd-contaminated soils. In medium and heavily Cd-contaminated soil, biochar primarily reduced Cd availability through its direct effect.…”

Section: Resultssupporting

confidence: 93%

“…The total Cd content in Jiyuan soils was higher than in the Yunfu soil ( Table 1 ). According to Meili Xu’s classification criteria [ 23 ], the Yunfu soil was categorized as lightly Cd-contaminated soil, while the soil in Jiyuan was classified as heavily Cd-contaminated soil. When assessing the reduction efficiency in these two soil types, UGW450 exhibited a markedly more significant reduction in the bioavailable Cd in the Jiyuan soil relative to the Yunfu soil.…”

Section: Resultsmentioning

confidence: 99%

“…While biochar has demonstrated promising results, its effectiveness depends on factors including feedstock, pyrolysis temperature, retention, and atmospheric conditions [ 19 , 20 ]. Several studies have reported varying results from the usage of different organic wastes (rice husk, maize straws, and animal manure) as feedstock materials for the synthesis of biochar [ 21 , 22 , 23 ].…”

Section: Introductionmentioning

confidence: 99%

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Biochar Derived from Urban Green Waste Can Enhance the Removal of Cd from Water and Reduce Soil Cd Bioavailability

Li,

Jeyakumar,

Bolan

et al. 2023

Toxics

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The beneficial utilization of potentially increasing urban green waste (UGW) is critical for sustainable urban development in China. In this study, UGW was pyrolyzed at different temperatures, and the resulting biochar was used to amend Cd-contaminated soils to grow cabbage. Our results showed that the Cd adsorption capacity of UGW-biochar was positively correlated with the surface area, O/C, and (O+N)/C value of biochar. Furthermore, UGW-biochar was incorporated into three Cd-contaminated soils, including one acidic soil and two neutral soils, to assess its impact on the availability of Cd. The most substantial reduction in the concentration of available Cd was observed in the acidic soil, of the three tested soils. In the neutral soils, a more substantial reduction was found in the heavily Cd-contaminated soil compared to the lightly Cd-contaminated soil. UGW-biochar amendments to the three Cd-contaminated soils resulted in an increase in the cabbage biomass in acidic soil, whereas in neutral soils, it increased in lightly contaminated soils but decreased in heavily contaminated soils. Additionally, the Cd bioaccumulation factor (BCF), translocation factor (TF), and removal efficiency (RE), as impacted by the biochar application, were calculated in the lightly Cd-contaminated soil–cabbage system. The BCF decreased from 5.84 to 3.80 as the dosage of the UGW-biochar increased from 0% to 3%, indicating that the UGW-biochar immobilized Cd and reduced its bioaccumulation in cabbage roots. Based on our investigations, UGW-biochar effectively immobilizes Cd by reducing its mobility and bioavailability in a lightly contaminated environment matrix.

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Section: Resultssupporting

confidence: 93%

Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Biochar Derived from Urban Green Waste Can Enhance the Removal of Cd from Water and Reduce Soil Cd Bioavailability

Li,

Jeyakumar,

Bolan

et al. 2023

Toxics

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show abstract

“…Regardless of the Cd 2+ presence in water or in soil, biochar has high adsorption capacity through functional groups, physical adsorption, and electrostatic attraction, with the biochar modification also having extensive research prospects [ [8] , [9] , [10] , [11] ]. As a good adsorbent and soil conditioner, biochar can not only directly adsorb and bind heavy metals through surface functional groups [ 12 , 13 ], but also affect Cd fractions by changing both the soil physicochemical properties and microbial community structure [ [14] , [15] , [16] ]. For example, [ 17 ] showed that coconut shell biochar significantly reduced the available Cd content in soil, improved soil urease activity, and increased the relative abundance of soil microbial community.…”

Section: Introductionmentioning

confidence: 99%

Effects of biochar on the transformation of cadmium fractions in alkaline soil

Sun

Zhang

et al. 2023

Heliyon

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“…Along with the efficient stabilization of Cd, extensive studies have focused and highlighted the ecological impact of biochar on the microbial taxa ( Xu et al, 2022 ; Zhu et al, 2022c ). In the natural environment, the abundance and distribution of species in microbial communities are non-uniform, with a few abundant species and a lot of rare species ( Jiao and Lu, 2020 ).…”

Section: Introductionmentioning

confidence: 99%

Biochar rebuilds the network complexity of rare and abundant microbial taxa in reclaimed soil of mining areas to cooperatively avert cadmium stress

Zhu

Wang

et al. 2022

Front. Microbiol.

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Understanding the interactions between the soil microbial communities and species is critical in the remediation of heavy metal-contaminated soil. Biochar has been widely applied as a stabilizer in the in situ remediation of cadmium (Cd)-contaminated soils in mining areas. However, the rebuilding of the microbial taxa of rare and abundant species by biochar and their cooperative resistance to Cd stress remains elusive. In this pursuit, the present study envisaged the effects of two types of biochars viz., poplar bark biochar (PB) and thiourea-modified poplar bark biochar (TP) on the rare and abundant bacterial and fungal taxa by using pot experiments. The results demonstrated that the PB and TP treatments significantly reduced the leached Cd content, by 35.13 and 68.05%, respectively, compared with the control group (CK), in the reclaimed soil of the mining area. The application of biochar significantly improved the physicochemical properties like pH and Soil Organic Matter (SOM) of the soil. It was observed that TP treatment was superior to the PB and CK groups in increasing the diversity of the soil abundant and rare species of microbial taxa. Compared with the CK group, the application of PB and TP enhanced and elevated the complexity of the microbial networks of rare and abundant taxa, increased the number and types of network core microorganisms, reshaped the network core microorganisms and hubs, and boosted the microbial resistance to Cd stress. Our results indicate the response of rare and abundant microbial taxa to biochar application and the mechanism of their synergistic remediation of Cd-contaminated soil, thereby providing technical feasibility for in situ remediation of Cd-contaminated soil in mining areas.

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Effect of rice straw biochar on three different levels of Cd-contaminated soils: Cd availability, soil properties, and microbial communities

Cited by 35 publications

References 52 publications

Biochar Derived from Urban Green Waste Can Enhance the Removal of Cd from Water and Reduce Soil Cd Bioavailability

Biochar Derived from Urban Green Waste Can Enhance the Removal of Cd from Water and Reduce Soil Cd Bioavailability

Effects of biochar on the transformation of cadmium fractions in alkaline soil

Biochar rebuilds the network complexity of rare and abundant microbial taxa in reclaimed soil of mining areas to cooperatively avert cadmium stress

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