The critical challenge of effectively removing Pb-EDTA complexes and Pb(II) ions from wastewater is pivotal for environmental remediation. This research introduces a cutting-edge bulk-MoS/HO system designed for the simultaneous decomplexation of Pb-EDTA complexes and extraction of free Pb(II) ions, streamlining the process by eliminating the need for subsequent treatment stages. The system exhibits outstanding efficiency, achieving 98.1% decomplexation of Pb-EDTA and 98.6% removal of Pb. Its effectiveness is primarily due to the generation of reactive oxygen species, notably •OH and O radicals, facilitated by bulk-MoS and HO. Key operational parameters such as reagent dosages, Pb(II): EDTA molar ratios, solution pH, and the presence of coexisting ions were meticulously evaluated to determine their impact on the system's performance. Through a suite of analytical techniques, the study confirmed the disruption of Pb–O and Pb–N bonds, further elucidating the decomplexation process. It also underscored the synergistic role of bulk-MoS’s adsorption properties and the formation of PbMoO-like precipitates in enhancing Pb elimination. Demonstrating the bulk-MoS/HO system as a robust, one-step solution that meets stringent Pb emission standards, this study provides in-depth insights into the removal mechanisms of Pb-EDTA, affirming its potential for broader application in wastewater treatment practices.

中文翻译：

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MoS2/H2O2 同时解络 Pb-EDTA 和消除游离 Pb 离子：机制和应用

有效去除废水中的 Pb-EDTA 络合物和 Pb(II) 离子的关键挑战对于环境修复至关重要。这项研究引入了一种尖端的块状 MoS2/H2O 系统，旨在同时解络 Pb-EDTA 络合物和提取游离 Pb(II) 离子，从而无需后续处理阶段，从而简化了流程。该系统表现出出色的效率，实现了 98.1% 的 Pb-EDTA 解络率和 98.6% 的 Pb 去除率。其有效性主要是由于大量 MoS2 和 H2O 促进了活性氧的生成，特别是·OH 和 O 自由基。试剂剂量、Pb(II): EDTA 摩尔比、溶液 pH 值以及共存离子的存在等关键操作参数均经过仔细评估，以确定它们对系统性能的影响。通过一系列分析技术，该研究证实了 Pb-O 和 Pb-N 键的破坏，进一步阐明了解络过程。它还强调了块状 MoS2 的吸附特性和 PbMoO 类沉淀物的形成在增强 Pb 消除方面的协同作用。这项研究证明了散装 MoS2/H2O 系统是一种稳健的一步式解决方案，可以满足严格的 Pb 排放标准，深入了解 Pb-EDTA 的去除机制，证实了其在废水处理实践中更广泛应用的潜力。