Lead and copper removal from groundwater by spherical agglomeration using a biosurfactant extracted from Yucca decipiens Trel
Lead and copper removal from groundwater by spherical agglomeration using a biosurfactant extracted from Yucca decipiens Trel
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DOI：
10.1016/j.chemosphere.2018.05.103
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发表时间：
2018-09-01
期刊：
影响因子：
8.8
通讯作者：
Proal-Najera, Jose B.
中科院分区：
文献类型：
--
作者：
Bailon-Salas, Ana M.;Ordaz-Diaz, Luis A.;Proal-Najera, Jose B.
球形团聚技术（SAT）已成为一种创新的替代方案，在最佳水平的表面活性剂添加从水中去除重金属。该技术实现了高去除效率。在本研究中，采用丝兰提取物作为生物表面活性剂，使用SAT去除采矿社区地下水中的重金属。生成水模型来解释溶液中铜和铅的去除。去除率分别为99.96%和99.62%。最高浓度的铜和铅209.5和2毫克L-1，分别观察到在一个水坑中的采矿社区。该样本用于测试SAT的效率，使用模型的最佳条件。可以去除地下水中99.22%的铜和91.50%的铅。发现高浓度的钠和钙。为了降低残留的钠浓度，将pH从11降低到9.5。去除了99.84%的铜和93.49%的铅;其余浓度未超过墨西哥法规的限值（NOM-001-SEMARNAT-1996，1996年）。结果表明，丝兰提取物在SAT条件下对高浓度重金属水的处理是有效的。(c)2018爱思唯尔有限公司版权所有。
The spherical agglomeration technique (SAT) has emerged as an innovative alternative for the removal of heavy metals from water at optimum levels of surfactant addition. This technique has achieved high removal efficiencies. In the present study, Yucca decipiens extracts were applied as the biosurfactant for the removal of heavy metals from groundwater of a mining community using SAT. Aqueous models were generated to explain the removal of copper and lead in solutions. It was possible to remove 99.96% and 99.62% respectively. The highest concentrations of copper and lead 209.5 and 2 mg L-1, respectively, were observed at a waterhole in the mining community. This sample was used to test the efficiency of SAT, using optimal conditions of the models. It was possible to remove 99.22% of copper and 91.50% of lead present in the groundwater. High concentrations of sodium and calcium were found. To reduce the residual sodium concentration, the pH was decreased from 11 to 9.5. 99.84% of copper and only 93.49% of lead were removed; the remaining concentrations did not exceed the limit of Mexican regulations (NOM-001-SEMARNAT-1996, 1996). It was demonstrated that the Yucca extracts are effective or the treatment of water with high concentrations of heavy metals under the conditions of SAT. (c) 2018 Elsevier Ltd. All rights reserved.