Dan QIU, Chunmiao LU, Huarong SUN, Chaohang LI, Guangqiang LONG, Ping ZHAO, Yijun LONG, Yue DING, Cuixia SU, Zhengyan PAN, Yuefang CAO, Shuran HE
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After one month of growth, the Pb content in aboveground and belowground parts of the maize seedlings, CaCl<sub>2</sub>-extracted Pb content, the proportion of different speciation of Pb within the soil, and soil properties were determined. We determined Pb uptake by maize seedlings, soil physicochemical properties, and Pb speciation in soil.</p><h3 data-test=\"abstract-sub-heading\">Results</h3><p>The addition of PE and PBAT particles led to the decrease in Pb content in maize root with the increase in concentration. The addition of 0.1% PBAT particles significantly increased the Pb content in the shoot of maize plants by 37.60% and Pb content in the root by 65.06% compared with 0.1% PE. The addition of PE and PBAT particles increased the proportion of residual Pb to 36.0% and 38.0%, respectively. The correlation analysis showed that the addition of MPs mainly affected the absorption of Pb by maize plants by affecting soil pH, dissolved organic carbon (DOC), cation exchange capacity (CEC), free crystalline Mn (MnDCB), and amorphous Fe (FeTamm).</p><h3 data-test=\"abstract-sub-heading\">Conclusions</h3><p>This study demonstrates that biodegradable and nonbiodegradable MPs in soil inhibited Pb accumulation in maize seedling roots. FeDCB, MnDCB, and FeTamm may be the main control factors affecting the inhibition of lead uptake by PE in maize seedling roots. Additionally, FeTamm may be the main controlling factor influencing PBAT to reduce lead accumulation in maize seedling roots. The results of the present study could provide novel insights into the toxicity and bioavailability effects of MPs and Pb on maize, as well as a valuable reference for ongoing research on the ecological risk assessment of MPs and other pollutants in the soil environment.</p>","PeriodicalId":17139,"journal":{"name":"Journal of Soils and Sediments","volume":"29 1","pages":""},"PeriodicalIF":2.8000,"publicationDate":"2024-06-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":"{\"title\":\"Exploring the Impact of Biodegradable and Nonbiodegradable Microplastic Particles on Pb Absorption in Maize\",\"authors\":\"Dan QIU, Chunmiao LU, Huarong SUN, Chaohang LI, Guangqiang LONG, Ping ZHAO, Yijun LONG, Yue DING, Cuixia SU, Zhengyan PAN, Yuefang CAO, Shuran HE\",\"doi\":\"10.1007/s11368-024-03813-x\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"<h3 data-test=\\\"abstract-sub-heading\\\">Purpose</h3><p>The aim of this study was to explore the effects of the variations in biodegradable and nonbiodegradable microplastic particles (MPs) on the absorption of lead (Pb) in maize.</p><h3 data-test=\\\"abstract-sub-heading\\\">Materials and methods</h3><p>Pot experiments were conducted using maize and two types of MPs, nonbiodegradable polyethylene (PE) and biodegradable polybutylene adipate/terephthalate (PBAT), at four different MP concentrations (0, 0.1, 1, and 10%). After one month of growth, the Pb content in aboveground and belowground parts of the maize seedlings, CaCl<sub>2</sub>-extracted Pb content, the proportion of different speciation of Pb within the soil, and soil properties were determined. We determined Pb uptake by maize seedlings, soil physicochemical properties, and Pb speciation in soil.</p><h3 data-test=\\\"abstract-sub-heading\\\">Results</h3><p>The addition of PE and PBAT particles led to the decrease in Pb content in maize root with the increase in concentration. The addition of 0.1% PBAT particles significantly increased the Pb content in the shoot of maize plants by 37.60% and Pb content in the root by 65.06% compared with 0.1% PE. The addition of PE and PBAT particles increased the proportion of residual Pb to 36.0% and 38.0%, respectively. 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引用次数: 0
摘要
材料与方法采用玉米和两种类型的微塑料颗粒（不可生物降解的聚乙烯（PE）和可生物降解的聚己二酸丁二醇酯/对苯二甲酸丁二醇酯（PBAT）），在四种不同的微塑料颗粒浓度（0、0.1、1和10%）下进行盆栽实验。生长一个月后，测定了玉米幼苗地上部分和地下部分的铅含量、CaCl2 萃取的铅含量、土壤中不同种类铅的比例以及土壤性质。我们测定了玉米幼苗对铅的吸收、土壤理化性质和土壤中铅的种类。结果添加 PE 和 PBAT 颗粒后，玉米根中的铅含量随着浓度的增加而降低。与 0.1% PE 相比，添加 0.1% PBAT 颗粒可使玉米植株芽中的铅含量显著增加 37.60%，根中的铅含量显著增加 65.06%。添加 PE 和 PBAT 颗粒后，残余铅的比例分别增加到 36.0% 和 38.0%。相关分析表明，MPs 的添加主要通过影响土壤 pH 值、溶解有机碳（DOC）、阳离子交换容量（CEC）、游离结晶锰（MnDCB）和无定形铁（FeTamm）来影响玉米植株对铅的吸收。FeDCB、MnDCB 和 FeTamm 可能是影响玉米幼苗根部 PE 对铅吸收抑制作用的主要控制因子。此外，FeTamm 可能是影响 PBAT 减少玉米幼苗根系铅积累的主要控制因子。本研究的结果可为了解多溴联苯和铅对玉米的毒性和生物利用率效应提供新的见解，同时也为正在进行的多溴联苯和其他污染物在土壤环境中的生态风险评估研究提供有价值的参考。
Exploring the Impact of Biodegradable and Nonbiodegradable Microplastic Particles on Pb Absorption in Maize
Purpose
The aim of this study was to explore the effects of the variations in biodegradable and nonbiodegradable microplastic particles (MPs) on the absorption of lead (Pb) in maize.
Materials and methods
Pot experiments were conducted using maize and two types of MPs, nonbiodegradable polyethylene (PE) and biodegradable polybutylene adipate/terephthalate (PBAT), at four different MP concentrations (0, 0.1, 1, and 10%). After one month of growth, the Pb content in aboveground and belowground parts of the maize seedlings, CaCl2-extracted Pb content, the proportion of different speciation of Pb within the soil, and soil properties were determined. We determined Pb uptake by maize seedlings, soil physicochemical properties, and Pb speciation in soil.
Results
The addition of PE and PBAT particles led to the decrease in Pb content in maize root with the increase in concentration. The addition of 0.1% PBAT particles significantly increased the Pb content in the shoot of maize plants by 37.60% and Pb content in the root by 65.06% compared with 0.1% PE. The addition of PE and PBAT particles increased the proportion of residual Pb to 36.0% and 38.0%, respectively. The correlation analysis showed that the addition of MPs mainly affected the absorption of Pb by maize plants by affecting soil pH, dissolved organic carbon (DOC), cation exchange capacity (CEC), free crystalline Mn (MnDCB), and amorphous Fe (FeTamm).
Conclusions
This study demonstrates that biodegradable and nonbiodegradable MPs in soil inhibited Pb accumulation in maize seedling roots. FeDCB, MnDCB, and FeTamm may be the main control factors affecting the inhibition of lead uptake by PE in maize seedling roots. Additionally, FeTamm may be the main controlling factor influencing PBAT to reduce lead accumulation in maize seedling roots. The results of the present study could provide novel insights into the toxicity and bioavailability effects of MPs and Pb on maize, as well as a valuable reference for ongoing research on the ecological risk assessment of MPs and other pollutants in the soil environment.
期刊介绍：
The Journal of Soils and Sediments (JSS) is devoted to soils and sediments; it deals with contaminated, intact and disturbed soils and sediments. JSS explores both the common aspects and the differences between these two environmental compartments. Inter-linkages at the catchment scale and with the Earth’s system (inter-compartment) are an important topic in JSS. The range of research coverage includes the effects of disturbances and contamination; research, strategies and technologies for prediction, prevention, and protection; identification and characterization; treatment, remediation and reuse; risk assessment and management; creation and implementation of quality standards; international regulation and legislation.
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