Remarkable contamination characteristics, potential hazards and source apportionment of heavy metals in surface dust of kindergartens in a northern megacity of China - Peng Wang; Guilin Han; Jian Hu; Qian Zhang; Liyan Tian; Lingqing Wang; Tingyi Liu; Wenmin Ma; Jun Li; Houyi Zheng (Journal of Hazardous Materials, 2024)