Cottonseed extract as a coagulant for water treatment
Cottonseed extract as a coagulant for water treatment
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DOI：
10.1039/d2va00205a
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发表时间：
2023-02-06
期刊：
影响因子：
--
通讯作者：
Kumar, Manish
中科院分区：
文献类型：
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作者：
Depaolis, Mekayla;De Respino, Sophie;Kumar, Manish
混凝是水处理中减少悬浮和溶解污染物的重要单元过程。然而，明矾和氯化铁等化学混凝剂的使用会加剧铝暴露方面的健康问题，以及由于污泥量大而导致的可持续性问题。生物混凝剂是化学混凝剂的低成本、可持续的替代品。在这项工作中，研究了平均蛋白质含量为 77.0 +/- 13.5 mu g mL-1 的棉籽粕提取物的混凝有效性，结果显示，无论初始浊度 (62.5-717 NTU) 和提取物的使用期限（2-218 天）如何，均可将浊度降低 90%。还研究了不同剂量的棉籽粕提取蛋白（0.77-3.83 mg L-1）对浊度去除的影响。将棉籽粕提取物分离成碳水化合物和蛋白质部分以确定活性成分，结果发现蛋白质部分主要负责凝血活性。进一步分析蛋白质提取物以研究棉籽粕提取物中存在的蛋白质，从而鉴定包括豆球蛋白和豌豆球蛋白在内的几种蛋白质。这项工作详细介绍了一种有效的生物混凝剂棉籽粕提取物，由于其蛋白质成分，它可以实现高浊度去除。混凝是水处理中减少悬浮和溶解污染物的重要单元过程，而棉籽粕提取物可以作为有效的生物混凝剂。
Coagulation is an important unit process of water treatment to decrease suspended and dissolved contaminants. However, the use of chemical coagulants, such as alum and ferric chloride, contributes to growing health concerns regarding aluminum exposure and sustainability concerns due to high sludge volumes. Bio-coagulants represent low-cost, sustainable alternatives to chemical coagulants. In this work, cottonseed meal extract, with an average protein content of 77.0 +/- 13.5 mu g mL-1, was investigated for its coagulation effectiveness and was shown to decrease turbidity by 90%, regardless of initial turbidity (62.5-717 NTU) and the age of extract (2-218 days). Varying doses of cottonseed meal extract protein (0.77-3.83 mg L-1) on turbidity removal were also investigated. The cottonseed meal extract was separated into carbohydrate and protein fractions to determine the active component and it was found that the protein fraction was primarily responsible for coagulation activity. The protein extract was further analyzed to investigate the proteins present in the cottonseed meal extract to identify several proteins including legumin and vicilin. This work details an effective bio-coagulant, cottonseed meal extract, which can achieve high turbidity removal due to its protein components.Coagulation is an important unit process in water treatment to decrease suspended and dissolved contaminants and cottonseed meal derived proteins can be effective biocoagulants.