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A new block filter material with well-developed pores and stable chemical properties was prepared from a biomass ash by short-term and high-temperature sintering. The phosphorus adsorption properties, as well as the kinetics and thermodynamic behaviors, of this material were investigated in this paper. The results of the static adsorption experiments show that the biomass ash filter achieved higher phosphorus adsorption per unit under conditions of higher initial phosphorus concentration, higher reaction temperature, longer adsorption time, or lower solid-liquid ratio. Among these parameters, the solid-liquid ratio was the primary controlling parameter affecting phosphorus adsorption by the filter material. The maximum adsorption per unit of the filter material reached 7.72mg/g, when the initial concentration of phosphorus was 90mg/L, the reaction temperature was 55℃, the adsorption time was 1250min, the pH was 3, and the solid-liquid ratio was 1:200(g:mL). The surface of the material exhibited a heterogeneous structure, and its phosphorus adsorption was primarily driven by multilayer physical endothermic adsorption, supplemented by monolayer or multilayer spontaneous chemical adsorption. Under the dynamic adsorption conditions, the phosphorus adsorption capacity of this filter material per unit was 9.8, 22.27 and 27.22 times that of three common commercial filter materials, including coconut shell biochar, ceramsite and natural zeolite, respectively. This indicates excellent adsorption properties, enabling water purification while achieving biomass ash disposal and recycling, making it highly valuable for promotion.
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| 科 Family | 属数 Number of genus | 种数 Number of species | 占总种数比例 Percentage of total species (%) | 属 Genus | 种数 Number of species | 占总种数比例 Percentage of total species (%) |
|---|---|---|---|---|---|---|
| 鹅膏菌科Amanitaceae | 2 | 11 | 5.26 | 鹅膏菌属 Amanita | 10 | 4.78 |
| 小菇科 Mycenaceae | 2 | 12 | 5.74 | 丝盖伞属 Inocybe | 5 | 2.39 |
| 多孔菌科 Polyporaceae | 8 | 14 | 6.70 | 蜡蘑属 Laccaria | 5 | 2.39 |
| 红菇科 Russulaceae | 3 | 23 | 11.00 | 小皮伞属 Marasmius | 6 | 2.87 |
| 小菇属 Mycena | 11 | 5.26 | ||||
| 光柄菇属 Pluteus | 5 | 2.39 | ||||
| 红菇属 Russula | 17 | 8.13 | ||||
| 栓菌属 Trametes | 5 | 2.39 |
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