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Decreased in vitro bioaccessibility of Cd and Pb in an acidic Ultisol through incorporation of crop straw-derived biochar.
Environ Pollut. 2023 Jan 15; 317:120721.EP

Abstract

Studies analyzing the in vitro bioaccessibility (BAc) of heavy metals in biochar-amended soils are currently lacking. The present study aimed to assess the metal BAc in Cd- and Pb-spiked acidic Ultisol samples treated individually with 2% (w/w) maize, rice, wheat, soybean, and pea straw-derived biochar. The results indicate that the Cd-BAc simulated in gastric phase (GP) decreased from 78.4% to 66.5-72.3% and the Pb-BAC decreased from 74.3% to 67.2-69.2%; however, the Cd-BAc in the intestinal phase (IP) decreased from 35.6% to 27.9-33.5% and the Pb-BAc decreased from 34.7% to 29.7-32.9% after 120 d of incubation with biochar application compared to the un-amended Ultisol. The Cd- and Pb-BAc in both GP and IP were significantly negatively correlated with soil pH, CEC, and organic carbon (P < 0.05), which increased after biochar application. The soybean straw-derived biochar amendment has the greatest potential to decrease the BAc of Cd and Pb in the GP and IP, owing to the highest level of CEC, SOC, TC and TN among all soil samples. Moreover, the BAc was positively correlated with the exchangeable, and exchangeable + carbonate-bound Cd and Pb fractions (P < 0.05), indicating these fractions had a dominant influence on the BAc of cationic heavy metals. Therefore, crop straw-derived biochar amendment can decrease the BAc of Cd and Pb in acidic Ultisol, and thus mitigate the health risks posed by these metals from incidental ingestion.

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Publisher Full Text (DOI)

Authors+Show Affiliations

Cui J
State Key Laboratory of Soil and Sustainable Agriculture, Institute of Soil Science, Chinese Academy of Sciences, P. O. Box 821, Nanjing, China; College of Resources and Environmental Sciences, Nanjing Agriculture University, Nanjing, 210095, China.
Yu Y
State Environmental Protection Key Laboratory of Environmental Pollution Health Risk Assessment, South China Institute of Environmental Sciences, Ministry of Ecology and Environment, Guangzhou, 510655, China.
Xiang M
State Environmental Protection Key Laboratory of Environmental Pollution Health Risk Assessment, South China Institute of Environmental Sciences, Ministry of Ecology and Environment, Guangzhou, 510655, China.
Shi Y
State Key Laboratory of Soil and Sustainable Agriculture, Institute of Soil Science, Chinese Academy of Sciences, P. O. Box 821, Nanjing, China.
Zhang F
State Key Laboratory of Soil and Sustainable Agriculture, Institute of Soil Science, Chinese Academy of Sciences, P. O. Box 821, Nanjing, China.
Fang D
College of Resources and Environmental Sciences, Nanjing Agriculture University, Nanjing, 210095, China.
Jiang J
State Key Laboratory of Soil and Sustainable Agriculture, Institute of Soil Science, Chinese Academy of Sciences, P. O. Box 821, Nanjing, China. Electronic address: jjiang@issas.ac.cn.
Xu R
State Key Laboratory of Soil and Sustainable Agriculture, Institute of Soil Science, Chinese Academy of Sciences, P. O. Box 821, Nanjing, China.

MeSH

CadmiumLeadSoil PollutantsMetals, HeavyCharcoalSoilOryzaAcids

Pub Type(s)

Journal Article

Language

eng

PubMed ID

36436663

Citation

Cui, Jiaqi, et al. "Decreased in Vitro Bioaccessibility of Cd and Pb in an Acidic Ultisol Through Incorporation of Crop Straw-derived Biochar." Environmental Pollution (Barking, Essex : 1987), vol. 317, 2023, p. 120721.
Cui J, Yu Y, Xiang M, et al. Decreased in vitro bioaccessibility of Cd and Pb in an acidic Ultisol through incorporation of crop straw-derived biochar. Environ Pollut. 2023;317:120721.
Cui, J., Yu, Y., Xiang, M., Shi, Y., Zhang, F., Fang, D., Jiang, J., & Xu, R. (2023). Decreased in vitro bioaccessibility of Cd and Pb in an acidic Ultisol through incorporation of crop straw-derived biochar. Environmental Pollution (Barking, Essex : 1987), 317, 120721. https://doi.org/10.1016/j.envpol.2022.120721
Cui J, et al. Decreased in Vitro Bioaccessibility of Cd and Pb in an Acidic Ultisol Through Incorporation of Crop Straw-derived Biochar. Environ Pollut. 2023 Jan 15;317:120721. PubMed PMID: 36436663.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Decreased in vitro bioaccessibility of Cd and Pb in an acidic Ultisol through incorporation of crop straw-derived biochar. AU - Cui,Jiaqi, AU - Yu,Yunjiang, AU - Xiang,Mingdeng, AU - Shi,Yangxiaoxiao, AU - Zhang,Feng, AU - Fang,Di, AU - Jiang,Jun, AU - Xu,Renkou, Y1 - 2022/11/24/ PY - 2022/8/1/received PY - 2022/11/2/revised PY - 2022/11/20/accepted PY - 2022/11/28/pubmed PY - 2023/1/6/medline PY - 2022/11/27/entrez KW - Bioaccessibility KW - Crop straw-derived biochar KW - Heavy metals KW - In vitro assays KW - Ultisol SP - 120721 EP - 120721 JF - Environmental pollution (Barking, Essex : 1987) JO - Environ Pollut VL - 317 N2 - Studies analyzing the in vitro bioaccessibility (BAc) of heavy metals in biochar-amended soils are currently lacking. The present study aimed to assess the metal BAc in Cd- and Pb-spiked acidic Ultisol samples treated individually with 2% (w/w) maize, rice, wheat, soybean, and pea straw-derived biochar. The results indicate that the Cd-BAc simulated in gastric phase (GP) decreased from 78.4% to 66.5-72.3% and the Pb-BAC decreased from 74.3% to 67.2-69.2%; however, the Cd-BAc in the intestinal phase (IP) decreased from 35.6% to 27.9-33.5% and the Pb-BAc decreased from 34.7% to 29.7-32.9% after 120 d of incubation with biochar application compared to the un-amended Ultisol. The Cd- and Pb-BAc in both GP and IP were significantly negatively correlated with soil pH, CEC, and organic carbon (P < 0.05), which increased after biochar application. The soybean straw-derived biochar amendment has the greatest potential to decrease the BAc of Cd and Pb in the GP and IP, owing to the highest level of CEC, SOC, TC and TN among all soil samples. Moreover, the BAc was positively correlated with the exchangeable, and exchangeable + carbonate-bound Cd and Pb fractions (P < 0.05), indicating these fractions had a dominant influence on the BAc of cationic heavy metals. Therefore, crop straw-derived biochar amendment can decrease the BAc of Cd and Pb in acidic Ultisol, and thus mitigate the health risks posed by these metals from incidental ingestion. SN - 1873-6424 UR - https://www.unboundmedicine.com/medline/citation/36436663/Decreased_in_vitro_bioaccessibility_of_Cd_and_Pb_in_an_acidic_Ultisol_through_incorporation_of_crop_straw_derived_biochar_ DB - PRIME DP - Unbound Medicine ER -