Department of Chemical Engineering, State University of Maringá, 5790 - Colombo Avenue, zip-code 87020-900 Maringá, Brazil.
Department of Biotechnology, Genetics and Cell Biology, State University of Maringá, 5790 - Colombo Avenue, zip-code 87020-900 Maringá, Brazil.
Sci Total Environ. 2019 May 10;664:222-229. doi: 10.1016/j.scitotenv.2019.01.199. Epub 2019 Jan 22.
Many efforts have been made to minimize the polluting effect of wastewater containing dyes that are potentially toxic to the environment. The association of the coagulation/flocculation (CF) process, using saline extract of Moringa oleifera Lam (MO) seeds and subsequently ultrafiltration (UF) in TiO-modified membranes was performed to remove reactive black 5 dye (10 ppm, RB5) from aqueous solution. The efficiency of the hybrid process was measured by the removal of the dye concentration, apparent color and fouling parameters. The membranes were successfully modified as supported by characterization methods of SEM, FTIR-ATR and WCA. The efficiency of the processes, when applied separately was low. However, after CF and subsequently the filtration in a TiO-modified membrane both parameters assessed (dye concentration, apparent color) reached 100% of the removal rate. The modified membranes substantially improved permeate fluxes, for instance, after CF the dye flux for modified membrane enhanced around 49% compared with the flux in the pristine membrane. According to these results, the combination of methods was able to effectively remove RB5 dye, in addition to improving permeate fluxes and keeping fouling at low levels.
已经做出了许多努力来最小化含有染料的废水的污染影响，这些染料对环境可能具有毒性。使用辣木（Moringa oleifera Lam）种子的盐水提取物和随后在 TiO 改性膜中的超滤（UF）联合使用凝聚/絮凝（CF）工艺，以从水溶液中去除活性黑 5 染料（10ppm，RB5）。通过去除染料浓度、表观颜色和污垢参数来测量混合工艺的效率。通过 SEM、FTIR-ATR 和 WCA 等表征方法成功地对膜进行了改性。当单独应用这些工艺时，效率较低。然而，在 CF 之后并随后在 TiO 改性膜中过滤后，评估的两个参数（染料浓度、表观颜色）的去除率均达到 100%。改性膜大大提高了渗透通量，例如，在 CF 之后，与原始膜的通量相比，改性膜的染料通量提高了约 49%。根据这些结果，该方法的组合能够有效地去除 RB5 染料，同时还能提高渗透通量并保持低水平的污垢。
