Comparative analysis of new natural coagulant extracts for turbidity removal in water systems.

IF 2.5 4区 环境科学与生态学 Q3 ENGINEERING, ENVIRONMENTAL
Water Science and Technology Pub Date : 2025-04-01 Epub Date: 2025-03-28 DOI:10.2166/wst.2025.044
Nevine K Amin, Ola Abdelwahab, E-S Z El-Ashtoukhy, Mohamed Helmy Abdel-Aziz
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Abstract

The ability of two plant materials, lupin beans and rice straw, to serve as sources of coagulation-active components for water treatment was investigated using synthetic turbid water. The functional groups, surficial architecture, and elemental composition of lupin beans and rice straw were determined using FTIR, scanning electron microscope, and X-ray (EDAX). The point of zero charges, zeta potential, and particle size distribution of aqueous extracts were measured. The optimal dosage of 50 mg/L of the lupin bean extract achieved 86.4% turbidity removal at initial turbidity of 500 NTU, pH 7, and 25 °C. Similarly, rice straw extract achieved 63.3% removal under the same conditions. The coagulation efficiency of both extracts improved with higher initial turbidity and temperatures between 20 and 40 °C, and their performance was unaffected by pH variations. Combining natural coagulants with alum reduced alum usage by 25-50%, achieving up to 98.7% turbidity removal. These results suggest that the use of natural coagulants can effectively lower treatment costs and reduce environmental impacts associated with chemical coagulants.

新型天然混凝剂萃取物在水系统中除浊的比较分析。
采用人工合成浑浊水,研究了豆荚和稻草两种植物材料作为混凝活性组分来源的能力。采用红外光谱(FTIR)、扫描电镜(sem)和x射线(EDAX)对豆豆和稻草的官能团、表面结构和元素组成进行了测定。测定了水溶液萃取液的零电荷点、zeta电位和粒径分布。在初始浊度为500 NTU、pH为7、温度为25°C的条件下,最佳投加量为50 mg/L的罗宾豆提取物去浊率为86.4%。同样,在相同条件下,稻草提取液的去除率为63.3%。在20 ~ 40℃的初始浊度和温度范围内,两种萃取物的混凝效率均有所提高,且其性能不受pH变化的影响。将天然混凝剂与明矾结合使用,明矾的使用量减少了25-50%,浊度去除率高达98.7%。这些结果表明,使用天然混凝剂可以有效降低处理成本,减少化学混凝剂对环境的影响。
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来源期刊
Water Science and Technology
Water Science and Technology 环境科学-工程:环境
CiteScore
4.90
自引率
3.70%
发文量
366
审稿时长
4.4 months
期刊介绍: Water Science and Technology publishes peer-reviewed papers on all aspects of the science and technology of water and wastewater. Papers are selected by a rigorous peer review procedure with the aim of rapid and wide dissemination of research results, development and application of new techniques, and related managerial and policy issues. Scientists, engineers, consultants, managers and policy-makers will find this journal essential as a permanent record of progress of research activities and their practical applications.
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