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Fe(Ⅱ)协同过硫酸钾改善河道底泥的脱水性能

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李丹, 蓝师哲, 何岩, 黄民生. Fe(Ⅱ)协同过硫酸钾改善河道底泥的脱水性能[J]. 环境工程学报, 2018, 12(1): 338-348. doi: 10.12030/j.cjee.201703183
引用本文: 李丹, 蓝师哲, 何岩, 黄民生. Fe(Ⅱ)协同过硫酸钾改善河道底泥的脱水性能[J]. 环境工程学报, 2018, 12(1): 338-348. doi: 10.12030/j.cjee.201703183
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LI Dan, LAN Shizhe, HE Yan, HUANG Minsheng. Dehydration property of river sediment with combined conditioning using Fe(Ⅱ)-potassium persulfate[J]. Chinese Journal of Environmental Engineering, 2018, 12(1): 338-348. doi: 10.12030/j.cjee.201703183
Citation: LI Dan, LAN Shizhe, HE Yan, HUANG Minsheng. Dehydration property of river sediment with combined conditioning using Fe(Ⅱ)-potassium persulfate[J]. Chinese Journal of Environmental Engineering, 2018, 12(1): 338-348. doi: 10.12030/j.cjee.201703183
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Fe(Ⅱ)协同过硫酸钾改善河道底泥的脱水性能

  • 1.

    华东师范大学上海市城市化生态过程与生态恢复重点实验室,上海 200241

  • 2.

    华东师范大学生态与环境科学学院,上海 200241

  • 3.

    华东师范大学崇明生态研究院,上海 200241

  • 基金项目:

    上海市自然科学基金资助项目 (16ZR1408800)

    上海市浦江人才计划 (16PJD023)

    上海市大学生科研创新项目

    国家水体污染控制与治理科技重大专项(2013ZX07310001,2014ZX07101012)

Dehydration property of river sediment with combined conditioning using Fe(Ⅱ)-potassium persulfate

  • 1.

    Shanghai Key Lab for Urban Ecological Processes and Eco-Restoration, East China Normal University, Shanghai 200241, China

  • 2.

    School of Ecological and Environmental Sciences, East China Normal University, Shanghai 200241, China

  • 3.

    Institute of Eco-Chongming, East China Normal University, Shanghai 200241, China

  • Fund Project:

  • 摘要: 含水率是影响河道底泥后续处置效果与成本的重要因素,采用响应曲面法(RSM)和中心复合设计法(CCD)对Fe(Ⅱ)-过硫酸钾(K2S2O8)优化河道底泥脱水性能进行研究。结果表明,K2S2O8投加量为22.26 mg·g-1 TSS、Fe(Ⅱ)投加量为43.63 mg·g-1 TSS (K2S2O8和Fe(Ⅱ)投加摩尔比为1∶1.9),初始pH为5.95时,其脱水效果最佳,CST削减率在10 min内能够达到86.16%,与优化响应器拟合的最佳CST削减率86.44%基本一致。基于RSM建立CST削减率预测模型,模型的相关系数R2和R2adj分别为0.905 8和0.821 1,拟合度良好。经回归模型方差分析(ANOVA),底泥脱水效率受Fe(Ⅱ)投加量影响最大(P2S2O8投加量。与市场上常用聚合硫酸铁(PFS)和聚丙烯酰胺(PAM)相比,具有优越的经济性和良好的脱水效果。
    Abstract: The moisture of river sediment significantly influenced its dehydration and the disposal cost. Response surface method (RSM) and central composite design (CCD) were applied to optimize the effectiveness of combined oxidation conditioning process using Fe (Ⅱ) and potassium persulfate (K2S2O8). The results indicated that the optimum values for K2S2O8, Fe(Ⅱ), and initial pH were found to be 22.26 mg·g-1 TSS, 43.63 mg·g-1 TSS(n(K2S2O8)∶n(Fe(Ⅱ))=1∶1.9), pH=5.95, respectively. CST reduction was decreased to 86.16% in 10 min, in agreement with the predicted value of 86.44%. R2 and R2adj of predicted model was 0.905 8 and 0.821 1, respectively, which showed that RSM could explain the dehydration process with combined oxidation conditioning. ANOVA analysis confirmed that Fe(Ⅱ) (P2S2O8. Compared with polymeric ferric sulfate (PFS) and polyacrylamide (PAM), the combined oxidation conditioning has good performance in economy and dehydration property.
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  • 刊出日期:  2018-01-14

Fe(Ⅱ)协同过硫酸钾改善河道底泥的脱水性能

  • 1. 华东师范大学上海市城市化生态过程与生态恢复重点实验室,上海 200241
  • 2. 华东师范大学生态与环境科学学院,上海 200241
  • 3. 华东师范大学崇明生态研究院,上海 200241
基金项目:

上海市自然科学基金资助项目 (16ZR1408800)

上海市浦江人才计划 (16PJD023)

上海市大学生科研创新项目

国家水体污染控制与治理科技重大专项(2013ZX07310001,2014ZX07101012)

摘要: 含水率是影响河道底泥后续处置效果与成本的重要因素,采用响应曲面法(RSM)和中心复合设计法(CCD)对Fe(Ⅱ)-过硫酸钾(K2S2O8)优化河道底泥脱水性能进行研究。结果表明,K2S2O8投加量为22.26 mg·g-1 TSS、Fe(Ⅱ)投加量为43.63 mg·g-1 TSS (K2S2O8和Fe(Ⅱ)投加摩尔比为1∶1.9),初始pH为5.95时,其脱水效果最佳,CST削减率在10 min内能够达到86.16%,与优化响应器拟合的最佳CST削减率86.44%基本一致。基于RSM建立CST削减率预测模型,模型的相关系数R2和R2adj分别为0.905 8和0.821 1,拟合度良好。经回归模型方差分析(ANOVA),底泥脱水效率受Fe(Ⅱ)投加量影响最大(P2S2O8投加量。与市场上常用聚合硫酸铁(PFS)和聚丙烯酰胺(PAM)相比,具有优越的经济性和良好的脱水效果。

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