Abstract：
This study offers an insightful and detailed examination of microplastic pollution in the Huixian karst wetland\'s groundwater, providing novel insights into the complex interplay of microplastic characteristics and their seasonal dynamics. We meticulously quantified microplastic concentrations, observing significant seasonal variation with values ranging from 4.9 to 13.4 n·L-1 in the wet season and 0.53-49.4 n·L-1 in the dry season. Our analysis pinpoints human activities and atmospheric deposition as key contributors to this contamination. A critical finding of our research is the pronounced disparity in microplastic levels between open wells and covered artesian wells, highlighting the vulnerability of open wells to higher pollution levels. Through correlation analysis, we unearthed the crucial influence of the karst region\'s unique hydrogeological characteristics on microplastic migration, distinctively different from non-karst areas. The karst terrain, characterized by its caves and subterranean rivers, facilitates the downward movement of microplastics from surface to groundwater, exacerbating pollution levels. Our investigation identifies agricultural runoff and domestic wastewater as primary pollution sources. These findings not only underscore the urgent need for environmental stewardship in karst regions but also provide a crucial foundation for formulating effective strategies to mitigate microplastic pollution in karst groundwater. The implications of this study extend beyond the Huixian karst wetland, offering a template for addressing microplastic pollution in similar ecosystems globally.
摘要：
本研究对辉县喀斯特湿地地下水中的微塑料污染进行了深入而详细的研究，提供对微塑料特征及其季节动态的复杂相互作用的新颖见解。我们精心量化了微塑料的浓度，观察到显着的季节变化，雨季的值为4.9至13.4n·L-1，旱季的值为0.53-49.4n·L-1。我们的分析指出，人类活动和大气沉积是造成这种污染的主要原因。我们研究的一个重要发现是在开井和覆盖的自流井之间的微塑性水平的明显差异，强调了露天井对较高污染水平的脆弱性。通过相关性分析,我们发掘了岩溶地区独特的水文地质特征对微塑性运移的重要影响，与非岩溶地区明显不同。喀斯特地形,以洞穴和地下河为特征，促进微塑料从地表向下移动到地下水，加剧污染水平。我们的调查将农业径流和生活废水确定为主要污染源。这些发现不仅强调了岩溶地区对环境管理的迫切需要，而且为制定有效的策略以减轻岩溶地下水中的微塑料污染提供了至关重要的基础。这项研究的意义超出了辉县喀斯特湿地，为解决全球类似生态系统中的微塑料污染提供了模板。
