秸秆炭改性工艺比较及对污水厂尾水的氮磷吸附特性研究  

Comparison of Straw Charcoal Modification Processes and Adsorption Characteristics of Nitrogen and Phosphorus in Wastewater Plant Tailwater

作　　者：王欣然 唐岩 徐丽[1] WANG Xinran;TANG Yan;XU Li(School of Municipal and Environmental Engineering,Shenyang Jianzhu University,Shenyang Liaoning 110168,China;Shenyang Saisi Environmental Engineering Design&Research Centre Co.,Ltd.,Shenyang Liaoning 110000,China)

机构地区：[1]沈阳建筑大学市政与环境工程学院,辽宁沈阳110168 [2]沈阳赛思环境工程设计研究中心有限公司,辽宁沈阳110000

出　　处：《辽宁化工》2024年第11期1667-1672,共6页Liaoning Chemical Industry

摘　　要：为解决污水处理厂尾水深度脱氮除磷的问题,选取秸秆炭作为吸附材料,对秸秆炭进行不同浓度的酸碱盐单一改性以及锌镧联合改性,通过对比吸附量及脱氮除磷率,来确定脱氮除磷性能最佳的改性工艺。结果表明:当ZnCl_(2)-七水合氯化镧组合改性,ZnCl_(2)的质量浓度为100mg·L^(-1)、七水合氯化镧的浓度为0.5 mol·L^(-1)时,总磷去除率和吸附量分别为98.95%和0.990 mg·g^(-1),氨氮去除率和吸附量分别为35.86%和2.869 mg·g^(-1),此组合改性为最佳改性方案。通过扫描电镜观察改性前后秸秆炭,表征图片的结果显示经过ZnCl_(2)-七水合氯化镧组合改性后的秸秆炭孔洞明显增加,孔洞排列规律,比表面积增大,组合改性秸秆炭脱氮除磷效果优于单一改性。In order to solve the problem of deep nitrogen and phosphorus removal from the tail water of wastewater treatment plant,straw charcoal was used as adsorption material,and single modification of straw charcoal with different concentrations of acid and alkali salts as well as combined modification of zinc lanthanum was carried out to determine the best modification process for the best performance of nitrogen and phosphorus removal by comparing the adsorption amount and the removal rate of nitrogen and phosphorus.The results showed that through the ZnCl_(2)-lanthanum chloride heptahydrate combination modification,the mass concentration of ZnCl_(2)was 100 mg·L^(-1)and the concentration of lanthanum chloride heptahydrate was 0.5 mol·L^(-1),the total phosphorus removal rate and adsorption amount were 98.95%and 0.990 mg·g^(-1),respectively,and the ammonia nitrogen removal rate and adsorption amount were 35.86%and 2.869 mg·g^(-1),respectively,the combination modification process was the optimal modification scheme.The scanning electron microscope was used to observe the straw charcoal before and after the modification,the results of the characterization pictures showed that after the combination of ZnCl_(2)-heptahydrate lanthanum chloride modification of straw charcoal,the modified straw charcoal had significantly increased the number of holes,the arrangement of the holes was regular,the specific surface area increased,and the straw charcoal modified by the combination had better effect on the removal of nitrogen and phosphorus than that of the single modification.

关 键 词：秸秆炭 改性工艺 脱氮除磷 锌镧联合改性 

分 类 号：TQ914.1[化学工程]