CAJ | 학술논문

以砖混建筑垃圾为研究对象，采用人工模拟雨水，通过静态和动态吸附实验研究了不同粒径粒级建筑垃圾对雨水径流中Pb的吸附效果．实验结果表明：准二级动力学模型比准一级动力学模型能更好地描述建筑垃圾对Pb的吸附过程；Freundlich等温模型能较好地拟合其等温吸附过程；不同粒径粒级建筑垃圾均对雨水径流中的Pb具有较好的净化效果，去除率高达99％，粒径粒级越小，对Pb的净化效果越好，但其渗透性能越差；建筑垃圾的粒径粒级对Pb的吸附平衡时间、吸附速率和吸附量具有重要影响，粒径2．36～4．75 mm的建筑垃圾对Pb的平衡吸附速率和平衡吸附量最大，分别为18．1μg/min和5．5μg/g．上述研究结果为城市雨水径流中Pb污染的有效控制以及建筑垃圾资源化提供了科学依据．
이전혼건축랄급위연구대상，채용인공모의우수，통과정태화동태흡부실험연구료불동립경립급건축랄급대우수경류중Pb적흡부효과．실험결과표명：준이급동역학모형비준일급동역학모형능경호지묘술건축랄급대Pb적흡부과정；Freundlich등온모형능교호지의합기등온흡부과정；불동립경립급건축랄급균대우수경류중적Pb구유교호적정화효과，거제솔고체99％，립경립급월소，대Pb적정화효과월호，단기삼투성능월차；건축랄급적립경립급대Pb적흡부평형시간、흡부속솔화흡부량구유중요영향，립경2．36～4．75 mm적건축랄급대Pb적평형흡부속솔화평형흡부량최대，분별위18．1μg/min화5．5μg/g．상술연구결과위성시우수경류중Pb오염적유효공제이급건축랄급자원화제공료과학의거．
Construction wastes were selected as the adsorbents and static and dynamic adsorption batch experiments were carried out to investigate the adsorption of Pb to construction wastes with different particle size gradations in the simulated stormwater runoff system.The experimental results show that the pseudo-second-order kinetics model can better characterize the adsorption process of Pb than the pseudo-first-order kinetics model.The adsorption equilibrium data can be well fitted by the Freundlich isotherm model. The construction wastes with different tested size gradations can greatly remove Pb from stormwater runoff and their average removal rate can reach up to 99%.The construction wastes with narrow size distribution can better remove Pb but with worse permeability than those with wide size distribution. The particle size gradation of construction wastes greatly influences the equilibrium time rate and the capacity of Pb adsorption.The equilibrium adsorption rate and capacity are 18.1 μg/min and 5.5 μg/g respectively for the construction wastes with the size of 2.36 to 4.75 mm which are the greatest among the different size gradations.The present study provides a scientific basis for effectively controlling Pb pollution from stormwater runoff and the construction wastes resource utilization.