There are some weaknesses in the methodology of original paper “Informal landfill contributes to the pollution of microplastic in the surrounding environment” published in Environmental Pollution. We commented on the groundwater sampling procedure that affect the calculated concentrations of microplastics in groundwater. Important information related to the description of sampling wells, informal landfill, and the exact description of sample collection method are missing. In addition, significant data related to the groundwater like water level, flow direction, and velocity have been skipped, which are fundamental in groundwater related studies. There should be a clear diagram of landfill location and sampling wells in the landfill, for appropriate understanding of microplastics (MPs) pollution in surrounding environment of a landfill.

发表在《环境污染》上的原始论文“非正式垃圾填埋场对周围环境中微塑料的污染”的方法论存在一些缺陷。我们评论了影响地下水中微塑料计算浓度的地下水采样程序。缺少与采样井描述、非正式填埋场和样本采集方法的准确描述相关的重要信息。此外，与地下水相关的重要数据（如水位、流向和速度）已被跳过，这些数据是地下水相关研究的基础。填埋场应有清晰的填埋场位置和采样井示意图，以便正确了解填埋场周围环境中的微塑料（MPs）污染。