摘要
利用废玻璃、硫铁矿和工程弃土制备了一种新型玻璃轻石,研究5种基质组合(新型玻璃轻石、玻璃轻石、沸石、蛭石、陶粒)按2种装填方式(分层、混合)装填的生物滞留系统对雨水径流的渗蓄特性及在不同水力停留时间(HRT,5、10、20、30、40 h)下的污染物去除效果。结果表明:各处理的滞水率为48.97%~54.41%,且具有良好的渗透性能;不同处理对各污染物的净化效果存在一定差异,各处理对总氮(TN)、氨氮、总磷(TP)、化学需氧量(COD)的平均去除率分别为48.31%~84.90%、70.83%~91.09%、71.83%~90.78%、58.64%~74.32%,均以新型玻璃轻石处理的去除效果最好,对TN、氨氮、TP、COD的最高去除率分别可达92.71%、92.81%、97.54%、86.84%,出水水质基本达到《地表水环境质量标准》(GB 3838—2002)Ⅴ类标准。分层装填处理的TN、TP、COD去除率总体优于混合装填处理,混合装填时系统的氨氮去除能力较好。此外,基质深度与各污染物去除率均呈极显著正相关(P<0.01),HRT与TP去除率有极显著负相关性(P<0.01),无统一的最佳HRT。
A new-type glass pumice was prepared by using waste glass,pyrite and engineering waste soil,to study the infiltration and storage characteristics of rainwater runoff and the pollutant removal effect of the bioretention system filled with five kinds of combined substrate(new-type glass pumice,glass pumice,zeolite,vermiculite and ceramic)according to two filling methods(layering,mixing)and different hydraulic retention time(5,10,20,30,40 h individually).The results showed that the water retention rate of each treatment was 48.97%-54.41%,and it had good permeability.There were certain differences in the purification effect of different treatments on each pollutant,and the average removal rates of total nitrogen(TN),ammonia nitrogen,total phosphorus(TP),chemical oxygen demand(COD)were 48.31%-84.90%,70.83%-91.09%,71.83%-90.78%,58.64%-74.32%,respectively.The new-type pumice treatment demonstrated best removal effect,its maximum removal rates of TN,ammonia nitrogen,TP and COD were 92.71%,92.81%,97.54%,86.84%,respectively,and the effluent quality could reached theⅤlevel standard of“Environmental quality standard for surface water”(GB 3838-2002).The removal rates of TN,TP and COD in the layered filling treatment were generally better than those in the mixed filling treatment,while the removal rates of ammonia nitrogen were the opposite.The substrate depth was significantly positively correlated with pollutant removal efficiency(P<0.01).There was a significant negative correlation between hydraulic retention time and TP removal rate(P<0.01),and there was no uniform optimal residence time.
作者
粟春青
韩梦梦
鲁海燕
罗炘武
许勇
丁傲
宫彦章
SU Chunqing;HAN Mengmeng;LU Haiyan;LUO Xinwu;XU Yong;DING Ao;GONG Yanzhang(Shenzhen Wenke Landscape Co.,Ltd.,Guangdong Landscape and Ecological Restoration Engineering Technology Research Center,Shenzhen Guangdong 518026;School of Environmental Science and Engineering,South University of Science and Technology,Shenzhen Guangdong 518000)
出处
《环境污染与防治》
CAS
CSCD
北大核心
2024年第3期348-355,359,共9页
Environmental Pollution & Control
基金
深圳市科技计划项目(No.KCXFZ202002011006491)。
关键词
硫铁矿
玻璃轻石
生物滞留系统
渗蓄特性
净化能力
pyrite
glass pumice
bioretention systems
permeability and storage characteristics
purification capacity
