摘要
目的提高人工湿地基质材料处理农村生活污水中总磷、氨氮以及COD的处理效果,确定最佳工艺参数。方法斜发沸石经氢氧化钠和三氯化铁处理得到复合改性沸石,作为吸附材料处理污水,研究改性方式、粒径大小、沸石投加量、pH值等因素对处理效果的影响,并探讨吸附机理。结果复合改性沸石在投加量20 g/L、粒径0.2~0.4 mm、pH=7条件下,吸附反应平衡时,总磷去除率84.12%,氨氮的除率81.89%,COD去除率83.41%。复合改性沸石吸附过程更符合Langmuir等温吸附模型和准二级速率方程。结论复合改性沸石作为基质材料应用于人工湿地处理农村生活污水有良好效果。
Improve the treatment effect of constructed wetland matrix materials for total phosphorus,ammonia nitrogen and COD in rural domestic sewage,and determine the best process parameters.Clinoptilolite was treated with sodium hydroxide and ferric chloride to obtain composite modified zeolite,which was used as an adsorbent to treat sewage.The influence of modification method,particle size,zeolite dosage,pH value and other factors on the treatment effect was studied and discussed the adsorption mechanism.Under the conditions of dosage of 20 g/L,particle size of 0.2-0.4 mm,and pH=7,when the adsorption reaction was balanced,the removal rate of total phosphorus was 84.12%,the removal rate of ammonia nitrogen was 81.89%,and the removal rate of COD was 83.41%.The adsorption process of the composite modified zeolite is more in line with the Langmuir isotherm adsorption model and the pseudo-second-order rate equation.The composite modified zeolite as a matrix material has a good effect in the treatment of rural domestic sewage in constructed wetlands.
作者
孙剑平
扈师鸣
李绍峰
SUN Jianping;HU Shiming;LI Shaofeng(School of Municipal and Environmental Engineering,Shenyang Jianzhu University,Shenyang,China,110168;School of Materials and Environmental Engineering,Shenzhen Vocational Technology University,Shenzhen,China,518055)
出处
《沈阳建筑大学学报（自然科学版）》
CAS
北大核心
2023年第4期754-760,共7页
Journal of Shenyang Jianzhu University：Natural Science
基金
水体污染控制与治理科技重大专项(2018ZX07601004-01)
辽宁省教育厅基本科研项目(LJKZ0578)
广东省教育厅科技类重点项目(2020ZDZX1078)。
关键词
沸石
复合改性
人工湿地
农村生活污水
zeolite
composite modification
constructed wetland
rural domestic sewage
