摘要
为寻找一种高效的水体沉积物修复方式,采用柠檬酸钠联合高温煅烧制备改性沸石,利用响应曲面法优化改性方法,在柠檬酸钠质量分数为2.43%,煅烧温度为420.21℃,煅烧时间为2.82 h条件下制备的复合改性沸石效果最佳;进行生物改性后,改性挂膜沸石覆盖沉积物15 d后上覆水中总氮、氨氮含量为0.70 mg/L、0.52 mg/L,抑制率分别为89.20%、91.20%,可达到地表Ⅲ类水水质标准,在对氮负荷进行抑制的同时,TOC抑制率为45.23%,改性挂膜沸石对沉积物释放的氮负荷及有机质达到有效地抑制。
In order to find an efficient way of water body sediment remediation,modified zeolite was prepared by sodium citrate combined with high-temperature calcination,using response surface method to optimize the modification method,and the composite modified zeolite prepared under the conditions of sodium citrate mass fraction of 2.43%,calcination temperature of 420.21℃,and calcination time of 2.82 h had the best effect;after biomodification,the modified hanging film zeolite covered the sediment for 15d after After biological modification,the total nitrogen and ammonia nitrogen content in the overlying water was 0.70 mg/L,0.52 mg/L,and the inhibition rate was 89.20%and 91.20%respectively,which could reach the water quality standard of surfaceⅢ,and at the same time of inhibiting nitrogen loading,the inhibition rate of TOC was 45.23%,and the modified zeolite released nitrogen loading and organic matter from the sediments were effectively inhibited.
作者
白文广
徐金兰
BAI Wenguang;XU Jinlan(College of Environmental and Municipal Engineering,Xi'an University of Architecture and Technology,Xi'an 710055,China;Key Laboratory of Northwest Water Resources and Environmental Ecology,Ministry of Education,Xi'an 710055,China;Key Laboratory of Environmental Engineering,Xi'an 710055,China)
出处
《水处理技术》
北大核心
2025年第3期37-43,共7页
Technology of Water Treatment
基金
国家自然科学基金项目(51778524)。
关键词
响应曲面
改性沸石
氮负荷
沉积物
生物改性
response surface
modified zeolite
nitrogen loading
sediment
biomodification
作者简介
白文广(1999-),男,硕士研究生,研究方向为沉积物修复,电子邮件:1633016305@qq.com;通讯作者:徐金兰,教授,电子邮件:xujinlan@xauat.edu.cn。
