硝酸钙投加对受污染河道修复效果的影响
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摘要
文章通过分析底泥和上覆水体中污染物含量的变化,探讨了硝酸钙投加对河道污染物控制效果的影响。结果表明:硝酸钙的投加明显改善了底泥的氧化还原电位,控制了底泥TP的释放,并有效削减底泥有机质含量,去除率可达到26.6%;硝酸钙的投加对上覆水体中的NH_4~+-N、COD、TP等都有明显的修复效果,DO含量明显提升,氨氮的去除率接近100%,COD去除率可达到50.1%,总磷去除率为72.0%。结合修复效果和经济成本,选择3.2 g/kg硝酸钙为最佳投加量。
The influence of calcium nitrate on contamination control in river was discussed via analyzing the change of contamination content in sediment and overlying water.The results showed that the addition of calcium nitrate improved the REDOX potential of sediment,controlled the release of TP,and reduced the organic matter content of sediment with the removal rate of 26.6%.The dosing of calcium nitrate had obviously positive effect on NH_4~+-N,COD,TP;and the value of DO was significantly improved.The highest removal rates of NH_4~+-N,COD and TP were near 100%,50.1%and 72.0%,respectively.Considering the remediation effect and economic cost,3.2 g/kg of calcium nitrate was selected as the optimal dosage.
The influence of calcium nitrate on contamination control in river was discussed via analyzing the change of contamination content in sediment and overlying water.The results showed that the addition of calcium nitrate improved the REDOX potential of sediment,controlled the release of TP,and reduced the organic matter content of sediment with the removal rate of 26.6%.The dosing of calcium nitrate had obviously positive effect on NH_4~+-N,COD,TP;and the value of DO was significantly improved.The highest removal rates of NH_4~+-N,COD and TP were near 100%,50.1%and 72.0%,respectively.Considering the remediation effect and economic cost,3.2 g/kg of calcium nitrate was selected as the optimal dosage.
引文
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[10]王君兰,邓伟,张平宇,等.湖泊沉积物不同粒级组分有机碳同位素差异及其对实验结果的影响[J].湖泊科学, 2014,26(4):625-631.Wang Junlan, Deng Wei, Zhang Pingyu, et al. The differences in organic carbon isotope of different size components in lake sediments and its impact on experimental results[J].Journal of Lake Science, 2014,26(4):625-631.
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[12]王小慧.受污染底泥的生物化学协同修复及条件优化[D].天津:天津大学, 2011.Wang Xiaohui. Biochemical Collaborative Remediation and Optimization of Polluted Sediment[D]. Tianjin:Tianjin University, 2011.
[13] Geerts L, Cox T J S, Maris T, et al. Substrate origin and morphology differentially determine oxygen dynamics in two major European estuaries, the Elbe and the Schelde[J]. Estuarine, Coastal and Shelf Science, 2017,191:157-170.
[14] Gunnars A, Blomqvist S. Phosphate exchange across the sediment-water interface when shifting from anoxic to oxic conditions:an experimental comparison of freshwater and brackish-marine systems[J]. Biogeochemistry, 1997, 37(3):203-226.
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[16] Cristale J, Dantas R F, De Luca A, et al. Role of oxygen and DOM in sunlight induced photodegradation of organophosphorous flame retardants in river water[J]. Journal of Hazardous Materials, 2017,323:242-249.
[17]李雪菱,张雯,李知可,等.红壤原位覆盖对河流底泥氮污染物释放的抑制研究[J].环境污染与防治, 2018(1):28-32.Li Xueling, Zhang Wen, Li Zhike, et al. Study on the control of nitrogen release from sediment by in-situ soil capping[J]. Environmental Pollution&Control, 2018(1):28-32.
[18]黄建军.城市河道底泥营养盐释放及化学修复研究[D].天津:天津大学, 2009.Huang Jianjun. Study on Nutrient Release and Chemical Remediation of Urban River Sediment[D]. Tianjin:Tianjin University, 2009.
[19] Wang G, Wang Y, Guo Y, et al. Effects of four different phosphorus-locking materials on sediment and water quality in Xi’an moat[J]. Environmental Science and Pollution Research, 2017,24(1):264-274.
[20]张丹.城市河道底泥化学修复的探索与研究[D].天津:天津大学, 2009.Zhang Dan. Exploration and Research on Chemical Remediation of Sediment in Urban River[D]. Tianjin:Tianjin University, 2009.
[2] Scholes L, Faulkner H, Tapsell S, et al. Urban rivers as pollutant sinks and sources:a public health concern for recreational river users[J]. Water, Air&Soil Pollution:Focus,2008,8(5/6):543-553.
[3] Murphy T P, Lawson A, Kumagai M, et al. Review of emerging issues in sediment treatment[J]. Aquatic Ecosystem Health and Management, 1999,2(4):419-434.
[4]罗霞娟,腾晓旭,时建伟.受污染河流底泥的治理研究进展[J].当代化工研究, 2017(4):56-58.Luo Xiajuan, Teng Xiaoxu, Shi Jianwei. Control technology and development of contaminated river sediment[J]. Modern Chemical Research, 2017(4):56-58.
[5]濮培民,王国祥.底泥疏浚能控制湖泊富营养化吗[J].湖泊科学, 2000,12(3):269-279.Pu Peimin, Wang Guoxiang. Can we control lake eutrophication by dredging[J]. Journal of Lake Science, 2000, 12(3):269-279.
[6] Liu G, Ye C, He J, et al. Lake sediment treatment with aluminum, iron, calcium and nitrate additives to reduce phosphorus release[J]. Journal of Zhejiang University:Science A, 2009,10(9):1367-1373.
[7] Ripl W. Biochemical oxidation of polluted lake sediment with nitrate:a new lake restoration method[J]. Ambio, 1976,132-135.
[8] Wauer G, Gonsiorczyk T, Kretschmer K, et al. Sediment treatment with a nitrate-storing compound to reduce phosphorus release[J]. Water Research, 2005,39(2/3):494-500.
[9] Liu X, Tao Y, Zhou K, et al. Effect of water quality improvement on the remediation of river sediment due to the addition of calcium nitrate[J]. Science of the Total Environment,2017,575:887-894.
[10]王君兰,邓伟,张平宇,等.湖泊沉积物不同粒级组分有机碳同位素差异及其对实验结果的影响[J].湖泊科学, 2014,26(4):625-631.Wang Junlan, Deng Wei, Zhang Pingyu, et al. The differences in organic carbon isotope of different size components in lake sediments and its impact on experimental results[J].Journal of Lake Science, 2014,26(4):625-631.
[11]施瑾.不同稳定剂用于底泥污染物就地稳定化的研究[D].上海:上海大学, 2007.Shi Jin. Study on Stabilization of Sediment Pollutants in situ by Different Stabilizers[D]. Shanghai:Shanghai University,2007.
[12]王小慧.受污染底泥的生物化学协同修复及条件优化[D].天津:天津大学, 2011.Wang Xiaohui. Biochemical Collaborative Remediation and Optimization of Polluted Sediment[D]. Tianjin:Tianjin University, 2011.
[13] Geerts L, Cox T J S, Maris T, et al. Substrate origin and morphology differentially determine oxygen dynamics in two major European estuaries, the Elbe and the Schelde[J]. Estuarine, Coastal and Shelf Science, 2017,191:157-170.
[14] Gunnars A, Blomqvist S. Phosphate exchange across the sediment-water interface when shifting from anoxic to oxic conditions:an experimental comparison of freshwater and brackish-marine systems[J]. Biogeochemistry, 1997, 37(3):203-226.
[15] Gazeau F, Gattuso J P, Middelburg J J, et al. Planktonic and whole system metabolism in a nutrient-rich estuary(the Scheldt estuary)[J]. Estuaries, 2005,28(6):868-883.
[16] Cristale J, Dantas R F, De Luca A, et al. Role of oxygen and DOM in sunlight induced photodegradation of organophosphorous flame retardants in river water[J]. Journal of Hazardous Materials, 2017,323:242-249.
[17]李雪菱,张雯,李知可,等.红壤原位覆盖对河流底泥氮污染物释放的抑制研究[J].环境污染与防治, 2018(1):28-32.Li Xueling, Zhang Wen, Li Zhike, et al. Study on the control of nitrogen release from sediment by in-situ soil capping[J]. Environmental Pollution&Control, 2018(1):28-32.
[18]黄建军.城市河道底泥营养盐释放及化学修复研究[D].天津:天津大学, 2009.Huang Jianjun. Study on Nutrient Release and Chemical Remediation of Urban River Sediment[D]. Tianjin:Tianjin University, 2009.
[19] Wang G, Wang Y, Guo Y, et al. Effects of four different phosphorus-locking materials on sediment and water quality in Xi’an moat[J]. Environmental Science and Pollution Research, 2017,24(1):264-274.
[20]张丹.城市河道底泥化学修复的探索与研究[D].天津:天津大学, 2009.Zhang Dan. Exploration and Research on Chemical Remediation of Sediment in Urban River[D]. Tianjin:Tianjin University, 2009.