Water-soluble aerosol organic matters (WSAOMs) produced by biomass pyrolysis/burning can penetrate subsurface environment, and are anticipated to have a profound effect on the fate of contaminants in aquatic ecosystems. Herein, WSAOMs derived from corn straw (CS-WSAOMs) and pinewood sawdust (PW-WSAOMs) pyrolysis at 300–900 °C were utilized to investigate their mobility characteristics and impacts on the transport of heavy metal ions (i.e., Cd²⁺) in saturated quartz sand with or without soil colloids. This study clearly demonstrated that WSAOMs in subsurface systems exhibited high mobility, which increased as WSAOMs molecular sizes decreased and hydrogen-bond interactions between WSAOMs and sand grains declined. WSAOMs significantly improved heavy metal (i.e., Cd²⁺) and soil colloid-mediated Cd²⁺ mobility in the porous media, which stemmed from the increased binding affinities of colloids toward metal ions and the high mobility of WSAOMs. Interestingly, in terms of the mobility and colloid-facilitated transport of Cd²⁺, WSAOMs from higher pyrolysis temperatures exhibited enhanced effects; meanwhile, the PW-WSAOMs demonstrated stronger effects than the CS-WSAOMs. The trends were mainly attributed to the differences in the metal-binding affinities (e.g., cation-π interactions) and transport abilities of WSAOMs, as well as diverse Cd²⁺ adsorption capacities of colloids induced by various WSAOMs.

生物质热解/燃烧产生的水溶性气溶胶有机物 (WSAOM) 可以渗透到地下环境中，预计将对水生生态系统中污染物的命运产生深远影响。在此，利用玉米秸秆（CS-WSAOMs）和松木锯末（PW-WSAOMs）在 300-900 °C 热解衍生的 WSAOMs 研究它们的迁移特性和对重金属离子（即 Cd ²⁺）迁移的影响。在有或没有土壤胶体的饱和石英砂中。该研究清楚地表明，地下系统中的 WSAOMs 表现出高迁移率，随着 WSAOMs 分子尺寸的减小和 WSAOMs 与砂粒之间的氢键相互作用的减少而增加。WSAOM 显着改善重金属（即 Cd ²⁺) 和土壤胶体介导的 Cd ²⁺在多孔介质中的迁移率，这源于胶体对金属离子的结合亲和力增加和 WSAOM 的高迁移率。^{有趣的是，就 Cd 2+}的迁移率和胶体促进传输而言，来自较高热解温度的 WSAOM 表现出增强的效果；同时，PW-WSAOM 表现出比 CS-WSAOM 更强的效果。这些趋势主要归因于WSAOMs的金属结合亲和力（例如阳离子-π相互作用）和转运能力的差异，以及不同WSAOMs诱导的胶体对Cd ^{2+的不同吸附能力。}