Unveiling the occurrence of legacy and novel per- and polyfluoroalkyl substance in a Hebei Tourist Region, China: A combined target screening and computational toxicology study - Shuling Luo; Jie Li; Ning Zhang; Yanwei Li; Xinlei Li; Zongchao Huo; Shilong Ren; Ting Wang; Wanqian Guo (Journal of Environmental Chemical Engineering, 2026)