Modified chicken manure biochar enhanced the adsorption for Cd2+ in aqueous and immobilization of Cd in contaminated agricultural soil

Sun, Lijuan; Gong, Peiyun; Sun, Yuchun; Qin, Qin; Song, Ke; Ye, Jing; Zhang, Hong; Zhou, Bin; Xue, Yong

doi:10.1016/j.scitotenv.2022.158252

Cited by 50 publications

(11 citation statements)

References 39 publications

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“…According to a previous study, the saturated adsorption of Cd 2+ by chicken manure biochar, hydroxyapatite-modi ed chicken manure biochar, and MnFe 2 O 4 -modi ed chicken manure biochar reached 19.65, 111.53, and 109.94 mg•g − 1 , respectively (Sun et al 2022). Liu et al demonstrated that after adding 2% nano-zirconia-modi ed biochar to the soil for 60 days, the stabilization e ciency of arsenic reached 99.30%, the extractable arsenic content decreased to 3.07 µg•L − 1 , and the weak acid extractable and residual arsenic decreased by 90.57% and 51.46%, respectively (Liu et al 2021).…”

Section: Introductionmentioning

confidence: 83%

Passivation Remediation of Cadmium Contaminated Soil by Polyethyleneimine Modified Biochar

Wang

et al. 2022

Preprint

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Biochar was prepared from tobacco straws, and polyethyleneimine (PEI) was loaded on the biochar surface to produce PEI-modified biochar (PBC). The remediation effect of PBC on Cd-contaminated soil was studied. During the soil incubation, soil samples were collected three times at 30, 60 and 90 days, and the physical and chemical properties of soil and the contents of heavy metals were determined after natural drying. After conducting passivation and remediation of Cd-contaminated soil, the available Cd content decreased significantly, the residual and oxidizable heavy metal Cd contents in the soil increased significantly, and the weak acid extractable Cd content decreased. When the PBC addition amount was 3% and the soil was cultured for 90 d, the available Cd content in the soil decreased by 54.36%, the weak acid extractable Cd content decreased by 35.36%, and the residual Cd content increased by 184.67%. This indicates that PBC can be used to repair heavy metal-contaminated soil and reduce the bioavailability, migration, and transformation ability of heavy metal Cd.

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Section: Introductionmentioning

confidence: 83%

Passivation Remediation of Cadmium Contaminated Soil by Polyethyleneimine Modified Biochar

Wang

et al. 2022

Preprint

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“…466-468 cm −1 : Si-O-Si; 559 cm −1 : Fe-O, P=O; 873 cm −1 : C-H; 1030-1050: C-O; 1415 cm −1 : -COO; 1586-1602 cm −1 : C=O; 3425 cm −1 : O-H 2020), this water film should have enhanced H 2 S dissolution and ionization, improving H 2 S adsorption on biochars (Xu et al 2014;Sitthikhankaew et al 2014). The product S 0 is highly active atom and can self-assembly to small S clusters, which could diffuse along the carbon surface, covering or blocking the pores (Sun et al 2022). Water can then promote sulfur deposition at different carbon sites and mechanically remove sulfur from active sites, decelerating the biochar deactivation process (Zhang et al 2016b).…”

Section: Promotion By H 2 O In H 2 S Removal On Dfw-bcmentioning

confidence: 99%

The influencing mechanism of O2, H2O, and CO2 on the H2S removal of food waste digestate-derived biochar with abundant minerals

Huang

Wang

Bai

et al. 2022

Biochar

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Hydrogen sulfide (H2S) removal has been a significant concern in various industries. In this study, food waste digestate-derived biochar (DFW-BC), a by-product of food waste treatment with abundant minerals, was assessed for removing H2S from different simulated biogas containing oxygen (O2) and carbon dioxide (CO2) and under different moisture (H2O) contents (0% and 20%) of biochar. The influencing mechanisms of the gas conditions combined with the moisture contents were also investigated. The results showed an H2S removal of 1.75 mg g−1 for dry biochar under pure H2S, 4.29 mg g−1 for dry biochar under H2S + O2, 5.29 mg g−1 for humid biochar under H2S, and 12.50 mg g−1 for humid biochar under H2S + O2. For dry DFW-BC, the high Fe content was responsible for the O2 enhancement. In contrast, O2 + H2O activated the catalytic H2S oxidation of the less reactive minerals (mainly Ca). The inhibition of CO2 on H2S adsorption was not obvious for dry DFW-BC; the specific pore structure may have provided a buffer against the physisorption competition of CO2. However, when H2O was present on DFW-BC, the changes in critical biochar properties and sulfur speciation as opposed to that without H2O implied an evident occurrence of CO2 chemisorption. This CO2 chemisorption partially hindered O2 + H2O enhancement, decreasing the H2S removal capacity from 12.50 to 8.88 mg g−1. The negative effect was ascribed to mineral carbonation of CO2, neutralizing the alkaline surface and immobilizing metal oxides, which thus reduced the acceleration in H2S dissociation and activation in catalytic H2S oxidation by O2 + H2O. Graphical Abstract

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“…Numerous studies have reported the Cd adsorption capacity of biochar in environmental media. 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] ].…”

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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Modified chicken manure biochar enhanced the adsorption for Cd2+ in aqueous and immobilization of Cd in contaminated agricultural soil

Cited by 50 publications

References 39 publications

Passivation Remediation of Cadmium Contaminated Soil by Polyethyleneimine Modified Biochar

Passivation Remediation of Cadmium Contaminated Soil by Polyethyleneimine Modified Biochar

The influencing mechanism of O2, H2O, and CO2 on the H2S removal of food waste digestate-derived biochar with abundant minerals

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

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