Phosphate is the main limiting factor of water eutrophication. In order to effectively control phosphorus pollution in water, straw microwave charcoal(CaCl2SBC) was prepared with straw after CaCl2activation and microw...Phosphate is the main limiting factor of water eutrophication. In order to effectively control phosphorus pollution in water, straw microwave charcoal(CaCl2SBC) was prepared with straw after CaCl2activation and microwave biomass carbonization, and the adsorption effect of phosphate by CaCl2SBC was analyzed. The results showed that the prepared straw microwave charcoal contained hydroxyl and carbon-carbon double bonds, and CaCl2SBC had a very obvious adsorption effect on phosphate in eutrophic water. The optimum conditions for the adsorption of phosphate by CaCl2SBC are as follows: initial concentration of phosphate was 50 mg/L;adsorption time was 120 min;pH was 9;adsorption temperature was 25 ℃;CaCl2SBC dosage was 300 mg/L. Under the optimum conditions, the maximum removal rate can reach 99%. The prepared straw microwave charcoal can be used for phosphorus removal from eutrophic water.展开更多
Based on previous studies,the effects of the type,content,particle size and state of sediment on the determination of total phosphorus in water are analyzed.The results show that the type of sediment has a certain inf...Based on previous studies,the effects of the type,content,particle size and state of sediment on the determination of total phosphorus in water are analyzed.The results show that the type of sediment has a certain influence on the determination result of total phosphorus,and the influence cannot be ignored.The degree of influence depends on the specific type.Sediment content is negatively correlated with the determination result of total phosphorus in water.That is,the higher the sediment content is,the lower the determination result is.The particle size of sediment is positively correlated with the determination result of total phosphorus in water.That is,the larger the particle size of sediment is,the higher the determination result is.Among the static,semi-suspended and completely suspended states,the sediment in the static state has the least impact on the determination of total phosphorus,and it has the greatest impact on the determination of total phosphorus when it is fully suspended.Therefore,in the analysis and testing process of total phosphorus,attention should be paid to the impact of sediment to improve the authenticity of the test results.展开更多
基金Supported by the High-quality Ecological Restoration of Damaged Water BodyVocational Education Personnel Training and Education and Teaching Reform Research Project of Sichuan Provincial Department of Education during2022-2024 (GZJG2022-014)Education and Teaching Research Project of Chengdu Textile College in 2022 (2022cdfzjj19)。
文摘Phosphate is the main limiting factor of water eutrophication. In order to effectively control phosphorus pollution in water, straw microwave charcoal(CaCl2SBC) was prepared with straw after CaCl2activation and microwave biomass carbonization, and the adsorption effect of phosphate by CaCl2SBC was analyzed. The results showed that the prepared straw microwave charcoal contained hydroxyl and carbon-carbon double bonds, and CaCl2SBC had a very obvious adsorption effect on phosphate in eutrophic water. The optimum conditions for the adsorption of phosphate by CaCl2SBC are as follows: initial concentration of phosphate was 50 mg/L;adsorption time was 120 min;pH was 9;adsorption temperature was 25 ℃;CaCl2SBC dosage was 300 mg/L. Under the optimum conditions, the maximum removal rate can reach 99%. The prepared straw microwave charcoal can be used for phosphorus removal from eutrophic water.
基金Supported by Sichuan Province Science and Technology Planning Project(Key R&D Project)(2017SZ0177)Scientific Research Project of Education Department of Sichuan Province(18ZB0020)+1 种基金Major Cultivation Project of Chengdu Textile College(2015fzlka01)High-quality Restoration of Damaged Water Body(500245H20002).
文摘Based on previous studies,the effects of the type,content,particle size and state of sediment on the determination of total phosphorus in water are analyzed.The results show that the type of sediment has a certain influence on the determination result of total phosphorus,and the influence cannot be ignored.The degree of influence depends on the specific type.Sediment content is negatively correlated with the determination result of total phosphorus in water.That is,the higher the sediment content is,the lower the determination result is.The particle size of sediment is positively correlated with the determination result of total phosphorus in water.That is,the larger the particle size of sediment is,the higher the determination result is.Among the static,semi-suspended and completely suspended states,the sediment in the static state has the least impact on the determination of total phosphorus,and it has the greatest impact on the determination of total phosphorus when it is fully suspended.Therefore,in the analysis and testing process of total phosphorus,attention should be paid to the impact of sediment to improve the authenticity of the test results.
