Kun Tu¹, Qiang Wu², Chaofan Chen³, Jirka Šimůnek⁴ and Ke Zhu², (1)China University of Mining and Technology, Beijing; University of California, Riverside, Riverside, United States, (2)China University of Mining and Technology, Beijing, Beijing, China, (3)Helmholtz Centre for Environmental Research (UFZ); Dresden University of Technology, Leipzig, Germany, (4)University of California, Riverside, Riverside, United States