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  卒业论文

  负载型零价铁处理含铬废水初步研究

  摘要:情况中的铬可以直接或直接进入人体,对人体安康形成伤害,因此应采取及时有效的方法办理含铬废水,防治铬污染。本试验采取具有优胜吸附才华的离子交换树脂作载体,经过FeSO4与NaBH反应制备了负载型零价铁。用负载型零价铁做恢复剂,除去废水中的六价铬。试验了介质pH,温度及反应物浓度对含铬废水去除率的影响。试验结果标明:较低的pH、低浓度的六价铬和高剂量的零价铁对去除率都有提高。另外,随温度的降低而去除率加大年夜,变更比拟清晰,但到必然的温度,其降低幅度又随其减小,乃至降低,35℃是一个起色点。

  关键词: 离子交换树脂;含铬废水;负载型零价铁;恢复;

   Abstract: Chromium in the environment enter the body directly or indirectly, cause harm to human health. Therefore, timely and effective way should be taken to chromium-containing wastewater treatment to Chromium pollution prevention and control, This experiment has a good adsorption capacity ion exchange resin as carrier, By FeSO4 and NaBH reaction of zero valent iron supported. Supported zero-valent iron with a reducing agent to do to remove the hexavalent chromium in waste water. Test the medium pH, temperature and reactant concentration on the removal of chromium-containing wastewater. The results show that: Low pH, low concentrations of hexavalent chromium and high doses of zero valent iron removal has increased. In addition, Removal rate with increasing temperature and increasing the change more obvious, but to a certain temperature, its decline and with its reduced, or even lower, 35℃ was a turning point.朗诵显示对应的拉丁字符的?字

  Keywords:Ion exchange resins; Hexavalent chromium wastewater; Supported zero-valent iron; Restore;

   目 录

  摘要 I

  Abstract II

  1 绪论 1

  1.1 配景 1

  1.2 零价铁去除水中六价铬的近况 1

  1.2.1 近况综述 1

  1.2.2 物理吸附与恢复 2

  1.2.3 零价铁去除水中重金属离子的研究近况 2

  1.2.4 外表吸附—合营 2

  1.2.5 恢复 3

  1.2.6 外表吸附—恢复 3

  2 资料与方法 5

  2.1 试验流程 5

  2.2 剖析方法 5

  2.3 试验内容 6

  2.3.1 试剂及仪器 6

  2.3.2 阳离子交换树脂负载纳米ZVI的制备 7

  2.3.3 负载型ZVI恢复六价铬 7

  3 结果与评论辩论 9

  3.1 阳离子交换树脂外表ZVI结构 9

  3.2 负载型ZVI对六价铬的恢复后果 10

  3.2.1 温度对情况后果的影响 11

  3.2.2 初始浓度对恢复后果的影响 12

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