Toxicity identification evaluation for hydraulic fracturing flowback and produced water during shale gas exploitation in China: Evidence from tissue residues and gene expression

Fan Wu, Zhimin Zhou, Shaoqiong Zhang, Fei Cheng, Yujun Tong, Liang Li, Biao Zhang, Xiangying Zeng, Huizhen Li, Dali Wang, Zhiqiang Yu, Jing You