Belhaine Ali, Ghezzar Mouffok Redouane, Abdelmalek Fatiha, Tayebi Kamel, Ghomari Abdelhamid, Addou Ahmed
Laboratoire des Sciences et Techniques de l'Environnement et de la Valorisation (STEVA), Université de Mostaganem, BP 188, Mostaganem 27000, Algeria E-mail:
Laboratoire de Science et Genie des Materiaux, USTHB, Alger, Algeria.
Water Sci Technol. 2016 Dec;74(11):2534-2540. doi: 10.2166/wst.2016.407.
This work is about the valorization of spent bleaching earth (SBE) at low cost from the AFIA oil refinery in Algeria's western region. The biowaste has been burned to eliminate the oil traces, then it has been valorized in two ways: (i) chemically, using phosphoric acid to obtain SBEC and (ii) thermally at 750 °C to create SBEH. The obtained materials were used for the first time as biosorbents in the wastewater treatment field. The three biomaterials show very interesting adsorption properties, with specific surfaces of 194.2, 784.6 and 888.5 m g for SBE, SBEC and SBEH, respectively. The analysis has revealed that the obtained materials are alumino-silicates. The three biowastes have been used to remove methylene blue dye from water. The dye was totally eliminated by a physisorption mechanism in the presence of 1 g L of each biowaste after 8, 10, 20 min of contact time. The highest correlation coefficient (R = 0.99) was related to the Langmuir isotherm, indicating a good fit with this model, and explaining the biosorption as a monolayer process. According to this model, the adsorption capacities were 123.3, 185.2 and 188.7 mg g for SBE, SBEH and SBEC, respectively. This study shows that SBE can be used as an alternative to commercial adsorbents for dye removal from water.
这项工作是关于低成本利用阿尔及利亚西部地区阿菲亚炼油厂的废漂白土（SBE）。这种生物废料经过焚烧以去除油迹，然后通过两种方式进行利用：（i）化学方式，使用磷酸获得SBEC；（ii）在750℃下进行热利用以制备SBEH。所获得的材料首次被用作废水处理领域的生物吸附剂。这三种生物材料表现出非常有趣的吸附性能，SBE、SBEC和SBEH的比表面积分别为194.2、784.6和888.5 m²/g。分析表明，所获得的材料是铝硅酸盐。这三种生物废料已被用于去除水中的亚甲基蓝染料。在每种生物废料浓度为1 g/L且接触时间分别为8、10、20分钟后，通过物理吸附机制可将染料完全去除。最高相关系数（R = 0.99）与朗缪尔等温线相关，表明与该模型拟合良好，并将生物吸附解释为单分子层过程。根据该模型，SBE、SBEH和SBEC的吸附容量分别为123.3、185.2和188.7 mg/g。这项研究表明，SBE可作为商业吸附剂的替代品用于去除水中的染料。
