Zulfiani Utari, Junaidi Afdhal, Nareswari Cininta, Ali Badrut Tamam Ibnu, Jaafar Juhana, Widyanto Alvin Rahmad, Dharma Hadi Nugraha Cipta, Widiastuti Nurul
Department of Chemistry, Faculty of Science and Data Analytics, Institut Teknologi Sepuluh Nopember Sukolilo Surabaya 60111 Indonesia
Advanced Membrane Technology Research Centre (AMTEC), Universiti Teknologi Malaysia 81310 Skudai Johor Bahru Malaysia.
RSC Adv. 2023 Mar 8;13(12):7789-7797. doi: 10.1039/d2ra07595d.
Industrial growth can have a good impact on a country's economic growth, but it can also cause environmental problems, including water pollution. About 80% of industrial wastewater is discharged into the environment without treatment, of which 17-20% is dominated by dyes, such as methylene blue (MB) and methyl orange (MO) from the textile industry. Only about 5% of a textile dye is used in the dyeing process and the rest is discarded. This problem, of course, requires special handling considering the harmful effects to health. On the other hand, the abundance of plastic waste is increasing by 14% or 85 000 tons per year. This problem must be solved due to its film-forming properties. High-density polyethylene (HDPE) is one type of plastic used as a membrane material. Therefore, in this study, HDPE plastic waste was utilized as a membrane for dye removal. In this study, HDPE plastic waste was fabricated a thermal-induced phase-separation method using mineral oil as a solvent at various concentrations of 8%, 10%, 13%, and 15% (w/w). All the membranes were characterized by scanning electron microscopy, Fourier transform infrared spectroscopy, and contact angle measurements. The results showed that the HDPE membrane at a concentration of 15% displayed the best performance compared to the others in terms of MB rejection. The negative charge (-36.9) of the HDPE membrane was more effective for cationic dye removal compared to the anionic dye. The flux and rejection of HDPE 15% for 100 ppm MB and MO removal were 2.71 and 4.93 L m h, and 99.72% and 89.8%, respectively. The pure water flux of the membrane was 15.01 L m h and the tensile strength was 0.3435 MPa.
工业增长对一个国家的经济增长会产生积极影响，但也可能引发环境问题，包括水污染。约80%的工业废水未经处理就排放到环境中，其中17% - 20%主要是染料废水，比如来自纺织业的亚甲基蓝（MB）和甲基橙（MO）。在染色过程中，纺织染料的利用率仅约5%，其余的都被丢弃了。鉴于其对健康的有害影响，这个问题当然需要特别处理。另一方面，塑料垃圾的数量正以每年14%或85000吨的速度增长。由于其成膜特性，这个问题必须得到解决。高密度聚乙烯（HDPE）是用作膜材料的一种塑料。因此，在本研究中，HDPE塑料垃圾被用作去除染料的膜。在本研究中，采用热致相分离法，以矿物油为溶剂，制备了浓度分别为8%、10%、13%和15%（w/w）的HDPE塑料垃圾膜。所有膜均通过扫描电子显微镜、傅里叶变换红外光谱和接触角测量进行表征。结果表明，在去除亚甲基蓝方面，浓度为15%的HDPE膜相比其他膜表现出最佳性能。HDPE膜的负电荷（-36.9）对阳离子染料的去除效果比对阴离子染料更有效。HDPE 15%膜对100 ppm的亚甲基蓝和甲基橙的通量和截留率分别为2.71和4.93 L m h，以及99.72%和89.8%。该膜的纯水通量为15.01 L m h，拉伸强度为0.3435 MPa。
