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投稿时间:2019-03-23 修订日期:2019-04-07 录用日期:2019-04-08 网络发布日期:2019-07-15
投稿时间:2019-03-23 修订日期:2019-04-07 录用日期:2019-04-08 网络发布日期:2019-07-15
中文摘要: 采用批次法研究了pH、反应时间、离子强度及腐殖酸(HA)对钢渣吸附U(Ⅵ)的影响。试验表明,钢渣对U(Ⅵ)的去除随时间呈先快后慢再变快的趋势,在10 h时达到吸附平衡;离子强度主要通过补偿电荷与电解质离子和吸附质离子交换竞争来影响,初始pH为3~5时,随离子强度的增加吸附量大幅减少;初始pH为6~9时,吸附量渐渐变大,但变化并不显著,高pH条件下,离子强度对吸附影响明显减弱。初始pH<3.5时,HA对钢渣吸附U(Ⅵ)有明显的促进作用,初始pH>4时,HA对吸附U(Ⅵ)起抑制作用,且随初始pH的增加不断增强。
Abstract:Effects of pH value, reaction time, ionic strength and humic acid(HA) on U(Ⅵ) adsorption by steel slag were studied by batch method. The experiments show that U(Ⅵ) removal by steel slag rises slowly first, then rapidly with time, and reaches adsorption equilibrium at 10 h. Ionic strength is mainly affected by compensation competition between charge and electrolyte ions and adsorbate ions exchange. With initial pH value of 3-5, adsorption capacity drops significantly with increase of ionic strength. With initial pH value of 6-9, adsorption capacity rises gradually with no significant change. At high pH value, influence of ionic strength on adsorption is obviously weakened. HA significantly promotes adsorption of U(VI) on steel slag with initial pH<3.5. HA has an inhibiting effect on adsorption of U(Ⅵ) with initial pH>4, and enhances with increase of initial pH value.
keywords: steel slag pH ionic strength humic acid(HA) reaction time
文章编号: 中图分类号: 文献标志码:
基金项目:国家自然科学基金资助项目(41562011);江西省研究生创新专项资金资助项目(YC2018-S342)
| 作者 | 单位 | |
| 杨天梓 | 东华理工大学省部共建核资源与环境国家重点实验室 东华理工大学水资源与环境工程学院 | ytz191447275123@163.com |
| 张卫民* | 东华理工大学水资源与环境工程学院,南昌 330013 | wmzhang@ecit.cn |
引用文本:
杨天梓,张卫民.钢渣对水溶液中U(Ⅵ) 去除效果的研究[J].有色金属(冶炼部分),2019(8):90-94.
yangtianzi,zhangweimin.Study of Effect of Steel Slag on U(Ⅵ) Removal from Aqueous Solution[J].Nonferrous Metals (Extractive Metallurgy),2019(8):90-94.
杨天梓,张卫民.钢渣对水溶液中U(Ⅵ) 去除效果的研究[J].有色金属(冶炼部分),2019(8):90-94.
yangtianzi,zhangweimin.Study of Effect of Steel Slag on U(Ⅵ) Removal from Aqueous Solution[J].Nonferrous Metals (Extractive Metallurgy),2019(8):90-94.

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