首页 馆藏资源 舆情信息 标准服务 科研活动 关于我们
现行 AWWA WQTC69369
到馆提醒
收藏跟踪
购买正版
Moringa oleifera: A Natural Coagulant, Adsorbent and Filter Aid 辣木:天然凝固剂、吸附剂和助滤剂
发布日期: 2008-11-01
本研究考察了辣木种子(一种热带树木)作为凝固剂、吸附剂和助滤剂的作用。这个 这种植物具有耐旱性,其大部分部分可用于各种用途。摘录自 对种子进行了混凝、助滤和吸附研究。水的凝结电位 将油桐与明矾和铁盐进行比较,并将其用作助滤剂,以提高过滤效率 缓慢滤砂器的成熟。用种子壳和固体残渣制备活性炭 采用混凝剂萃取法对铬进行吸附。关于血液凝固 在浑浊的天然和合成水中,油茶表现出与金属盐和有机盐相似的性能 在更宽的pH范围内有效。发现油茶凝固剂作为 观察到助凝剂与金属盐结合,并改善了有机物去除。慢沙 过滤(SSF)研究,结合M。 油脂作为助滤剂,表明在 使用助滤剂后,与未使用助滤剂的SSF相比,成熟期显著缩短 帮助有人观察到,间歇和短时间给药的油桐足以 提高成熟度,因为持续剂量会导致过度的头部发育。吸附作用 对铬的去除进行了分批试验,并研究了 分析了吸附剂剂量、接触时间、初始金属浓度、金属形态和pH值。 吸附研究表明,种子(经混凝剂萃取后)达到94%以上 Cr(III)和Cr(VI)的去除率分别为43%。种子壳中的活性炭 铬(III)和铬(VI)的去除率分别为99.9%和83%。研究表明 生物材料的不同应用可以结合在一起,以实现生物材料的最佳利用 水和废水处理方面的资源。 包括24个参考文献、表格和图表。
This study examines the Moringa oleifera seed (a tropical tree) as a coagulant, adsorbent and filter aid. The plant is drought resistant and most of its parts are useful for various applications. Extracts from the seed were investigated for coagulation, filter aid and adsorption. The coagulation potential of M. oleifera was compared against alum and iron salts, and was used as a filter aid to enhance the ripening of slow sand filters. Activated carbon prepared from the seed shell and solid residues after coagulant extraction were used for the adsorption of chromium. With respect to coagulation of turbid natural and synthetic waters, M. oleifera showed similar performance as metal salts and was effective in a wider range of pH. The M. oleifera coagulant was found to be effective as a coagulant aid in combination with metal salts, and improved organic removal was observed. Slow sand filtration (SSF) studies, in combination with M. oleifera as a filter aid, indicated that during the start-up use of filter aid, the ripening period was significantly reduced compared to SSF without filter aid. It was observed that intermittent and short period dosing of M. oleifera was sufficient to enhance ripening as continuous dosage resulted in excessive headloss development. Adsorption studies for the removal of chromium were carried out in batch experiments and the effects of adsorbent dose, contact time, initial metal concentrations, metal speciation and pH were analyzed. Adsorption studies indicated that the seed (after coagulant extraction) achieved more than 94% and 43% removal of Cr (III) and Cr (VI), respectively. The activated carbon from the seed shell removed 99.9% and 83% Cr (III) and Cr (VI), respectively. The studies demonstrated that the different applications of the bio-material can be integrated to achieve optimum utilization of the resource both in water and wastewater treatment. Includes 24 references, tables, figures.
分类信息
发布单位或类别: 美国-美国给水工程协会
关联关系
研制信息
相似标准/计划/法规