Barbosa Rui, Lapa Nuno, Lopes Helena, Günther Annika, Dias Diogo, Mendes Benilde
Universidade Nova de Lisboa, Faculdade de Ciências e Tecnologia, Departamento de Ciências e Tecnologia da Biomassa, Campus da Caparica, Ed. Departamental, Piso 3, gab. 377, 2829-516 Caparica, Portugal.
Universidade Nova de Lisboa, Faculdade de Ciências e Tecnologia, Departamento de Ciências e Tecnologia da Biomassa, Campus da Caparica, Ed. Departamental, Piso 3, gab. 377, 2829-516 Caparica, Portugal.
J Colloid Interface Sci. 2014 Jun 15;424:27-36. doi: 10.1016/j.jcis.2014.03.013. Epub 2014 Mar 12.
The main aim of this work was to study the removal efficiency of Pb from synthetic and industrial wastewaters by using biomass fly ashes. The biomass fly ashes were produced in a biomass boiler of a pulp and paper industry. Three concentrations of Pb(2+) were tested in the synthetic wastewater (1, 10 and 1000 mg Pb/L). Moreover, two different wastewaters were collected in an industrial wastewater treatment plant (IWWTP) of an industry of lead-acid batteries: (i) wastewater of the equalization tank, and (ii) IWWTP effluent. All the wastewaters were submitted to coagulation-flocculation tests with a wide range of biomass fly ashes dosage (expressed as Solid/Liquid - S/L - ratios). All supernatants were characterized for chemical and ecotoxicological parameters. The use of biomass fly ashes has reduced significantly the Pb concentration in the synthetic wastewater and in the wastewaters collected in the IWWTP. For example, the definitive coagulation-flocculation assays performed over the IWWTP effluent presented a very low concentration of Pb (0.35 mg/L) for the S/L ratio of 1.23 g/L. Globally, the ecotoxicological characterization of the supernatants resulting from the coagulation-flocculation assays of all wastewaters has indicated an overall reduction on the ecotoxicity of the crude wastewaters, due to the removal of Pb.
这项工作的主要目的是研究利用生物质飞灰去除合成废水和工业废水中铅的效率。生物质飞灰产生于一家制浆造纸厂的生物质锅炉。在合成废水中测试了三种浓度的Pb(2+)（1、10和1000 mg Pb/L）。此外，在一家铅酸电池厂的工业废水处理厂（IWWTP）收集了两种不同的废水：（i）均衡池废水，以及（ii）IWWTP出水。所有废水都采用了多种生物质飞灰投加量（以固液比-S/L-表示）进行混凝-絮凝试验。对所有上清液的化学和生态毒理学参数进行了表征。生物质飞灰的使用显著降低了合成废水以及IWWTP收集的废水中的铅浓度。例如，对IWWTP出水进行的最终混凝-絮凝试验表明，当固液比为1.23 g/L时，铅浓度非常低（0.35 mg/L）。总体而言，所有废水混凝-絮凝试验产生的上清液的生态毒理学表征表明，由于铅的去除，原废水的生态毒性总体降低。
