化学改性大薸对水中重金属离子的生物吸附及表征

吴双桃1, 朱慧2, 王桔红2

化工新型材料 ›› 2018, Vol. 46 ›› Issue (8) : 142 -145.

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化工新型材料 ›› 2018, Vol. 46 ›› Issue (8) : 142-145.
科学研究

化学改性大薸对水中重金属离子的生物吸附及表征

    吴双桃1, 朱慧2, 王桔红2
作者信息 +

Study on chemical modification of Pistia stratiotes L.and its adsorption and mechanism for heavy metal ion

  • Wu Shuangtao1, Zhu Hui2, Wang Juhong2
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摘要

采用氢氧化钠(NaOH)对入侵植物大薸(PS)进行化学改性制备改性大薸生物吸附剂(SPS),研究改性条件对SPS吸附铜离子(Cu2+)、锌离子(Zn2+)和铅离子(Pb2+)性能的影响,采用扫描电子显微镜等对改性大薸形貌和表面性质进行表征。结果表明:SPS对Cu2+和Zn2+的去除率随着改性剂NaOH浓度增加呈先增大后降低态势、随着改性时间延长和改性温度降低而呈增大态势。采用0.5mol/L的NaOH溶液,在30℃处理3h制备的SPS吸附性能最强,对Cu2+、Zn2+、Pb2+的去除率分别达到90.7%、99.1%和99.5%。

Abstract

Biosorbent(SPS)was prepared using invasive plant Pistia stratiotes L.(PS) modified by NaOH and the influence of modified condition on adsorption properties of Cu2+,Zn2+ and Pb2+ in aqueous solution were studied.In addition,the morphology and surface properties of modified Pistia stratiotes L.were characterized by scanning electron microscopy technique and so on.The results indicated that the removal rate for Cu2+ and Zn2+ by SPS increased with increasing time and decreasing temperature,and first increased and decreased then with increasing concentration of NaOH.The biosorptive efficiency of Cu2+,Zn2+ and Pb2+ reached to 90.7%、99.1% and 99.5% by SPS,and the optimal modified conditions for SPS were the concentration of NaOH(0.5mol/L),modified temperature 30℃ and modified time 3h.

关键词

生物吸附 / 大薸 / 重金属离子 / 化学改性

Key words

biosorption / Pistia stratiotes L. / heavy metal ions / chemical modification

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化学改性大薸对水中重金属离子的生物吸附及表征[J]. 化工新型材料, 2018, 46(8): 142-145 DOI:

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基金资助

国家自然科学基金项目(31770584);国家星火计划项目(2013GA780010);广东省协同创新与平台环境建设专项(2014A070713039);广东省科技发展专项资金(公益研究与能力建设方向)项目(2016A030303063);潮州市第一批科技计划项目(2016GY19)

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