1. National Engineering Laboratory for Efficient Utilization of Soil and Fertilizer Resources; Key Laboratory of Agricultural Environment in Universities of Shandong, College of Resources and Environment, Shandong Agricultural University; Taian 271018 People's Republic of China
2. Ministry of Education Key Laboratory of Pollution Processes and Environmental Criteria; Nankai University, People's Republic of China; Tianjin 300071 People's Republic of China