大气CO 2浓度升高对水稻根细胞壁吸收Cd影响的研究

IF 7.8 2区环境科学与生态学 Q1 ENGINEERING, CHEMICAL

Process Safety and Environmental Protection Pub Date : 2025-05-29 DOI:10.1016/j.psep.2025.107379

Yue Teng , Jiawei Hu , Huibo Sun , Yi Xiao , Jingyan Guo , Hongyan Yu

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引用次数: 0

摘要

探讨未来气候变化对水稻镉（Cd）积累机制的影响，有利于保障未来水稻粮食安全的风险控制。然而，目前关于二氧化碳（CO₂）的增加是否会影响水稻根细胞壁（RCW）对Cd的吸附的研究相对较少。以南京9108水稻为研究对象，在不同CO₂浓度（升高CO₂（EC）和环境CO₂（AC））条件下，对盆栽栽培的RCW进行了改良。通过吸附实验和傅里叶变换红外光谱（FTIR）分析，探讨了EC对水稻RCW吸附Cd机理的影响。Cd在两种条件下均以多层不均匀的化学吸附方式吸附在RCW上，主要是通过离子转移或交换。随着果胶的去除，EC背景下RCW对Cd的吸附速率、最大吸附量、主要官能团（羟基和羧基）的相对峰面积均显著降低。结果表明，EC主要刺激RCW中果胶含量及其主要官能团的变化，从而增强对Cd的吸附。

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Research on the impact of elevated atmospheric CO₂ concentration on Cd absorption in the cell walls of rice roots

Exploring the impact of future climate change on the cadmium (Cd) accumulation mechanism in rice is conducive to ensuring the risk control of rice food security in the future. However, currently, there are relatively few studies on whether the increase in carbon dioxide (CO₂) will affect the adsorption of Cd by the root cell walls (RCW) of rice. In this study, the RCW of Nanjing 9108 rice grown in pots under different CO₂ concentrations of elevated CO₂ (EC) and ambient CO₂ (AC) was modified. Through adsorption experiments and Fourier transform infrared spectroscopy (FTIR) analysis, the impact of EC on the mechanism of Cd adsorption by rice RCW was investigated. Cd was adsorbed on RCW under both conditions in a multi-layer non-uniform chemical adsorption manner, mainly through ion transfer or exchange. With the removal of pectin, the adsorption rate of Cd by RCW under the EC background, the maximum adsorption capacity, and the relative peak area of the main functional groups (hydroxyl and carboxyl groups) in RCW were all significantly reduced. The results indicate that EC primarily stimulates changes in the pectin content and its main functional groups in RCW, thereby enhancing the adsorption of Cd.

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来源期刊

Process Safety and Environmental Protection 环境科学-工程：化工

CiteScore

11.40

自引率

15.40%

发文量

929

审稿时长

8.0 months

期刊介绍： The Process Safety and Environmental Protection (PSEP) journal is a leading international publication that focuses on the publication of high-quality, original research papers in the field of engineering, specifically those related to the safety of industrial processes and environmental protection. The journal encourages submissions that present new developments in safety and environmental aspects, particularly those that show how research findings can be applied in process engineering design and practice. PSEP is particularly interested in research that brings fresh perspectives to established engineering principles, identifies unsolved problems, or suggests directions for future research. The journal also values contributions that push the boundaries of traditional engineering and welcomes multidisciplinary papers. PSEP's articles are abstracted and indexed by a range of databases and services, which helps to ensure that the journal's research is accessible and recognized in the academic and professional communities. These databases include ANTE, Chemical Abstracts, Chemical Hazards in Industry, Current Contents, Elsevier Engineering Information database, Pascal Francis, Web of Science, Scopus, Engineering Information Database EnCompass LIT (Elsevier), and INSPEC. This wide coverage facilitates the dissemination of the journal's content to a global audience interested in process safety and environmental engineering.