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Efficiently removing Pb(II) from wastewater by graphene oxide using foam flotation

机译:通过使用泡沫浮选通过石墨烯氧化物有效地从废水中除去Pb(II)

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摘要

The removal of Pb(II) from wastewater by graphene oxide (GO) using foam flotation was first investigated. Effects of initial solution pH, and the dosage of GO, emulsified kerosene and terpenic oil on the Pb(II) removal and turbidity of the residual solution were systematically examined. The experimental results showed that the initial solution pH and dosage of GO significantly affected the removal of Pb(II), and more than 99% of Pb(II) could be removed under the optimum conditions. The turbidity of the residual solution could decrease to 1.4 NTU at the optimal dosage of emulsified kerosene and terpenic oil. Moreover, the flotation-desorption cycles were carried out to evaluate the practical reusability of GO, and the Pb(II) removal maintained as high as 84.9% in the sixth regeneration. It indicated that GO could be efficiently reused in the process of foam flotation. This study provides an effective strategy for the selection of an optimized method to remove the spent GO from solution compared with the conventional methods including sedimentation, centrifugation and filtration,etc.
机译:首先研究了使用泡沫浮选的石墨烯氧化物(GO)从废水中除去Pb(II)。初始溶液pH的影响,以及GO的剂量,乳化煤油和萜烯油在PB(II)的去除和残留溶液中的浊度上进行了系统地检查。实验结果表明,初始溶液pH和剂量的液体显着影响Pb(II)的去除,并且在最佳条件下可以除去超过99%的Pb(II)。残留溶液的浊度可在乳化煤油和萜烯油的最佳剂量下降至1.4 NTU。此外,进行浮选 - 解吸循环以评估去的实际可重用性,并且Pb(II)除去在第六次再生中保持高达84.9%。它表明,可以在泡沫浮选过程中有效地重复使用。该研究提供了选择优化方法的有效策略,与常规方法相比,除去溶液,包括沉降,离心和过滤等。

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