Study on water purification with warm and cold season aquatic plants Jiajun Sun, Yajie Zhang, Guangyu Ma, Junhong Xiao, Yajing Cai, Zhi Wang and Hongbin Cao E3S Web Conf., 260 (2021) 01016 Published online: 19 May 2021 DOI: 10.1051/e3sconf/202126001016