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不同环境因子对纳米羟基磷灰石在饱和填充柱中迁移规律的影响
引用本文:褚灵阳,汪登俊,王玉军,司友斌,周东美.不同环境因子对纳米羟基磷灰石在饱和填充柱中迁移规律的影响[J].环境科学,2011,32(8):2284-2291.
作者姓名:褚灵阳  汪登俊  王玉军  司友斌  周东美
作者单位:1. 安徽农业大学资源与环境学院,合肥230036 中国科学院南京土壤研究所土壤与农业可持续发展国家重点实验室,南京210008
2. 中国科学院南京土壤研究所土壤与农业可持续发展国家重点实验室,南京210008 中国科学院研究生院,北京100049
3. 中国科学院南京土壤研究所土壤与农业可持续发展国家重点实验室,南京,210008
4. 安徽农业大学资源与环境学院,合肥,230036
基金项目:国家重点基础研究发展规划(973)项目(2007CB936604);中国科学院知识创新工程项目(KZCX2-YW-Q02-02)
摘    要:选用石英砂填充柱模拟土壤体系,通过测量纳米羟基磷灰石(Nano-HAP)ζ电位、出流比等来考察不同环境因素(腐殖酸浓度、pH和离子强度)对其在饱和石英砂柱中迁移规律的影响.结果表明,随着腐殖酸浓度的增加,Nano-HAP胶体的ζ电位相应增加(绝对值增加),吸附效率(α)相应降低,当溶液中腐殖酸浓度由0增加为10 mg/...

关 键 词:纳米羟基磷灰石(Nano-HAP)  腐殖酸(HA)  pH  离子强度(IS)  ζ电位  吸附效率(α)  DLVO理论
收稿时间:9/6/2010 12:00:00 AM
修稿时间:2010/11/22 0:00:00

Transport of hydroxyapatite nanoparticles in saturated packed column: effects of humic acid, pH and ionic strengths
CHU Ling-yang,WANG Deng-jun,WANG Yu-jun,SI You-bin and ZHOU Dong-mei.Transport of hydroxyapatite nanoparticles in saturated packed column: effects of humic acid, pH and ionic strengths[J].Chinese Journal of Environmental Science,2011,32(8):2284-2291.
Authors:CHU Ling-yang  WANG Deng-jun  WANG Yu-jun  SI You-bin and ZHOU Dong-mei
Institution:College of Resources and Environmental Sciences, Anhui Agricultural University, Hefei 230036, China. vivianchu7@gmail.com
Abstract:Quartz sand was selected as collector and saturated packed column was constructed to explore the effects of environmental factors (humic acid, pH and ionic strengths of the bulk solution) on the transport and fate of hydroxyapatite nanoparticles (Nano-HAP) through measuring zeta potentials and representative c(i)/c(0) of Nano-HAP. It was suggested that zeta potentials of Nano-HAP colloids became more negative with increasing humic acid concentration and the change in solution composition from 0 to 10 mg/L humic acid yielded an increase in the zeta potentials of Nano-HAP colloids from -15 mV to -55 mV and a sharp decrease in a (attachment efficiency) from 1.0 to 0.012, meanwhile, the increase in bulk solution pH yielded a slight decrease in a which enhancing its transportation in saturated packed column. However, zeta potentials of Nano-HAP colloids became less negative as the ionic strength of bulk solution increased due to the compression of diffuse double layer and yielded an increase in a which greatly impeded its mobility during the pore-water solution, meanwhile, divalent cations have significantly stronger influence on the transport of Nano-HAP than monovalent cations of the bulk solution. The increase in the concentration of monovalent cation (Na+) from 1 to 100 mmol/L yielded an increase in a from 0.030 to 0.13, and divalent cations (Ca2+) from 0.2 to 10 mmol/L yielded a greatly increase in alpha from 0.030 to 1.0. It is important to note that the results could considerably contribute to gain insights in the transport and fate of Nano-HAP in natured and engineered porous media.
Keywords:hydroxyapatite nanoparticles(Nano-HAP)  humic acid(HA)  pH  ionic strength(IS)  ζ potential  attachment efficiency(α)  DLVO theory
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