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. 5];10(10):65-74. Available from: https://www.mongoliajol.info/index.php/BICCT/article/view/2596