Vinasse based biochar was engineered by cold oxygen plasma for different treatment time between 1 and 10 min to obtain highly efficient adsorbent for Pb(II) in the aqueous solutions. The engineered biochar with largest surface area (307 m²/g) and primarily microporous structure was achieved when cold oxygen plasma is processed for 3 min, providing the highest adsorption capacity (481 mg/g) derived from 500 mg/L of Pb(II) solution. For the equilibrium time (90 min) and the favorite solution pH (5.0), the best-fitting isotherm model was Langmuir isotherm one with Q_o (714 mg/g), which is superior to those of many biochar based Pb(II) adsorbents in the literature. On the basis of XRD, XPS, FT-IR instruments and surface charge measurements, the adsorption mechanisms included ion-exchange, precipitation, electrostatic attraction, cation-π interaction and complexation. The reusable engineered vinasse biochar has also applicability to real water samples without matrix effects.

基于酒糟的生物炭通过冷氧等离子体设计，处理时间为 1 到 10 分钟，以获得水溶液中 Pb(II) 的高效吸附剂。当冷氧等离子体处理 3 分钟时，获得了具有最大表面积 (307 m ² /g) 和主要微孔结构的工程生物炭，提供最高的吸附容量 (481 mg/g)，来自 500 mg/L 的 Pb(二）解决方案。对于平衡时间（90 分钟）和最喜欢的溶液 pH 值（5.0），最适合的等温线模型是 Langmuir 等温线一，Q _o(714 mg/g)，优于文献中的许多基于生物炭的 Pb(II) 吸附剂。在XRD、XPS、FT-IR仪器和表面电荷测量的基础上，吸附机制包括离子交换、沉淀、静电吸引、阳离子-π相互作用和络合。可重复使用的工程酒糟生物炭也适用于没有基质效应的真实水样。