Buyan C, Bayarjargal B. Possibility of reducing water hardness with biochar derived from waste biomass. Himi, him. tehnol. hùrèèlèngijn èrdèm šinžilgèènij bùtèèl [Internet]. 2022 Dec. 28 [cited 2025 Dec. 23];10(10):65-74. Available from: https://test.mongoliajol.info/BICCT/article/view/2596