贵州民族大学Guangneng Zeng团队研究了磷石膏和镉修复剂：缓解稻田镉污染和CH₄排放的协同作用。该研究于2025年3月18日发表在《地球化学学报》杂志上。

稻田是大气甲烷（CH₄）的主要人为来源，目前面临着严重的镉（Cd）污染。中国储存了大量磷石膏，旨在提高耕地土壤肥力。然而，人们对磷石膏对稻田镉污染和甲烷排放的协同影响知之甚少。在这项研究中，课题组进行了一项盆栽实验，以评估磷石膏与巯基改性坡缕石（SMP）、枯草芽孢杆菌（BS）和硒叶面肥（SFF）等镉修复剂联合使用对土壤和水稻镉含量和CH₄排放的影响。

结果发现，大量的磷石膏（2250 kg ha⁻¹）可以显著降低土壤中生物可利用的镉含量。将修复剂与磷石膏结合使用可有效降低糙米中的镉含量。磷石膏可以显著减少稻田的CH₄排放，导致累积逃逸率为255.54-633.63 kg hm⁻²。该研究结果表明，磷石膏与镉修复剂的结合有效地减少了糙米中的镉污染和稻田中的甲烷排放，为农业环境中重金属污染和温室气体排放的协同管理提供了见解。

附：英文原文

Title: Phosphogypsum and cadmium remediation agents: A synergy for mitigating Cd contamination and CH4 emissions in rice paddies

Author: Lu, Wangbiao, Huang, Chengling, Luo, Weijun, Zhang, Qi, Huang, Xu, Jin, Yongcheng, Yao, Chen, Li, Xiaowen, Zeng, Guangneng, Yang, Fang, Tang, Liang, Wang, Shi-Jie

Issue&Volume: 2025-03-18

Abstract: Rice paddies, a major anthropogenic source of atmospheric methane (CH4), currently face significant cadmium (Cd) pollution. China has a substantial storage of phosphogypsum intended to enhance arable soil fertility. However, little is known about the impact of phosphogypsum on synergic Cd pollution and CH4 emission in rice paddies. In this study, we conducted a pot experiment to assess the effects of phosphogypsum, combined with Cd remediation agents such as sulfhydryl-modified palygorskite (SMP), bacillus subtilis (BS), and selenium foliar fertilizer (SFF), on soil and rice Cd contents and CH4 emissions. We found that a large amount of phosphogypsum (2250 kg ha1) can significantly reduce the bioavailable Cd content in soils. Combining remediation agents with phosphogypsum effectively reduced Cd levels in brown rice. Phosphogypsum can significantly reduce CH4 emissions from rice paddies, resulting in cumulative evasion rates of 255.54–633.63 kg hm2. Our results demonstrate that phosphogypsum paired with Cd remediation agents effectively reduces Cd contamination in brown rice and CH4 emissions from rice paddies, providing insights into the synergistic management of heavy metal pollution and greenhouse gas emissions in agricultural environments.

DOI: 10.1007/s11631-025-00770-1

Source: https://link.springer.com/article/10.1007/s11631-025-00770-1