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UV–Vis Spectroscopy Applied in the Determination of the Degradation Time of Abelmoschus esculentus Moench Solution Used as Natural Flocculant
Water, Air, & Soil Pollution ( IF 2.9 ) Pub Date : 2021-08-29 , DOI: 10.1007/s11270-021-05307-9
Dominique Martins Sala 1 , Patrícia Valderrama 1 , Ana Paula Peron 1 , Flávia Vieira da Silva-Medeiros 1
Affiliation  

Coagulation and flocculation are two of the steps in the water treatment process in which chemical coagulants based on iron salts or aluminum are used. In order to replace the aluminum or to reduce the concentration of the metal, several natural alternatives to assist in the coagulation/flocculation process have been evaluated, including the use of Abelmoschus escuentus Moench (okra) as a flocculating agent. To determine the degradation time of the okra solution, spectral measurements were performed on the UV–Vis region. The coagulation/flocculation tests were carried out in a jar test equipment, using aluminum polychoride as a coagulant, 1-mgL−1 okra solution as a flocculation aid, and the alkalinizing hydroxide of calcium. Through the spectral measurements and the test in the jar test, it was possible to verify that the solution of the okra remains stable only until the time of 24 h, and after this time, begins the degradation process of the constituents of the okra that promote the flocculation of it. In addition, satisfactory results were obtained in the treatment of water in 24 h, allowing the use of okra as flocculation aid and aluminum polychloride coagulant, as in effluent color removal, with an efficiency of 91 to 96%, and organic matter removal, with an efficiency of 92 to 93.5%.



中文翻译:

紫外-可见分光光度法用于测定用作天然絮凝剂的 Abelmoschus esculentus Moench 溶液的降解时间

混凝和絮凝是水处理过程中的两个步骤,其中使用基于铁盐或铝的化学混凝剂。为了替代铝或降低金属的浓度,已经评估了几种有助于混凝/絮凝过程的天然替代品,包括使用Abelmoschus escuentus Moench(秋葵)作为絮凝剂。为了确定秋葵溶液的降解时间,在 UV-Vis 区域进行了光谱测量。混凝/絮凝测试在罐式测试设备中进行,使用多氯化铝作为混凝剂,1-mgL -1秋葵溶液作为絮凝助剂,以及钙的碱化氢氧化物。通过光谱测量和罐中试验,可以验证秋葵溶液仅在 24 小时之前保持稳定,在此时间之后,开始促进秋葵成分的降解过程。它的絮凝。此外,在24小时内处理水得到满意的结果,允许使用秋葵作为絮凝助剂和多氯化铝混凝剂,如在出水颜色去除,效率为91-96%,有机物去除,与92% 到 93.5% 的效率。

更新日期:2021-08-29
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