Couto Rafael Schirmer de Paula, Oliveira Aline Faria, Guarino Alcides Wagner Serpa, Perez Daniel Vidal, Marques Mônica Regina da Costa
a Environmental Technology Laboratory , State University of Rio de Janeiro , Rio de Janeiro , Brazil.
b Laboratório de Análises Ambientais, Instituto de Biologia , Universidade Federal do Estado do Rio de Janeiro , Brazil.
Environ Technol. 2017 Apr;38(7):816-826. doi: 10.1080/09593330.2016.1212935. Epub 2016 Jul 28.
This study aimed to evaluate the ammonia-nitrogen removal by aluminosilicates, using both standard solutions as pretreated landfill leachate. Three types of commercial clays and one commercial zeolite were initially tested using standard solution; however, only one clay with the best removability and the zeolite were tested with pretreated leachate. The chosen clay sorption capacity with the standard solution reached 83%, while with the pretreated leachate solution has reached 95% and zeolites have reached, respectively, a removal of 73% and 81%. For this two adsorbents' studies of equilibrium and kinetic of the sorption were also performed. The Langmuir model was more adequate to describe the ion exchange equilibrium and the sorption mechanism fit the pseudo-second-order kinetic model. Moreover, the pretreatment used on leachate proved to be essential not only for ammonium detection in solution, but also to facilitate its sorption in aluminosilicates. This alternative of ammonia-nitrogen removal also generates a product derived from treatment that can be used as agricultural feedstock in the form of fertilizer.
本研究旨在评估铝硅酸盐对氨氮的去除效果，使用标准溶液和预处理后的垃圾渗滤液进行测试。最初使用标准溶液对三种商业粘土和一种商业沸石进行了测试；然而，仅对去除效果最佳的一种粘土和沸石使用预处理后的渗滤液进行了测试。所选粘土对标准溶液的吸附容量达到83%，而对预处理后的渗滤液溶液的吸附容量达到95%，沸石对氨氮的去除率分别达到73%和81%。还对这两种吸附剂进行了吸附平衡和动力学研究。朗缪尔模型更适合描述离子交换平衡，吸附机理符合准二级动力学模型。此外，事实证明，对渗滤液进行预处理不仅对于溶液中铵的检测至关重要，而且有助于其在铝硅酸盐中的吸附。这种氨氮去除方法还产生了一种处理后产物，可作为肥料形式的农业原料使用。
