VNU Journal of Science Earth and Environmental Sciences, Vol 36, No 3 (2020) 93 101 93 Original Article Ecotoxicity Evaluation of Spent Biomixtures Used for Pesticides Degradation Dao Van Huy1, Nguyen Xuan Hieu2, Phan Thi Thao Ly3, Ngo Thi Tuong Chau4, Le Van Thien4,* 1VNU Institute for Education Quality Assurance, 144 Xuan Thuy, Cau Giay, Hanoi, Vietnam 2Quang Tri Department of Education and Training, 136 National Highway 9, Dong Ha, Quang Tri, Vienam 3School of Medicine and Pharmacy, The Unive[.]