Co-transport of biogenic nano-hydroxyapatite and Pb(II) in saturated sand columns: Controlling factors and stochastic modeling

Zhou，Dongbao1; Han，Xuan2; Zhang，Yong3; Wei，Wei2; Green，Christopher T.4; Sun，Hong Guang1; Zheng，Chunmiao5

2021-07-01

10.1016/j.chemosphere.2021.130078

CHEMOSPHERE   影响因子和分区

0045-6535

1879-1298

Biogenic nano-hydroxyapatite (bio-nHAP) has recently gained great interest in many domains, especially in the remediation of heavy metal-contaminated soil, due to its high reactivity, low cost, and eco-friendly nature. The co-transport and reaction of bio-nHAP with Pb(II) in saturated porous media, however, are not well understood. This work investigated the effects of ionic strength (IS), ionic composition (IC), dissolved organic matter (DOM), and flow velocity on transport-reaction dynamics of Pb(II) and bio-nHAP by combining column breakthrough experiments and model simulations. Results showed that the mobility of Pb(II) was significantly enhanced with increasing IS/IC but less affected by flow velocity during the transport-reaction process of bio-nHAP and Pb(II) in the saturated sand column; while the transport of bio-nHAP was restricted by increasing IS/IC but facilitated by increasing velocity. IC, IS, and velocity only slightly affected the reaction kinetics between Pb(II) and bio-nHAP, likely due to the fast reaction rate between Pb(II) and bio-nHAP and precipitation of pyromorphite. The transport dynamics of bio-nHAP and Pb(II) were significantly changed by DOM, and this effect depended strongly on the type of DOM with different molecular weights. Breakthrough curves of Pb(II) and bio-nHAP exhibited apparent “anomalous”, sub-diffusive transport behaviors, which could be well quantified by a novel tempered fractional derivative bimolecular reaction equation (T-FBRE). Our findings highlighted the accurate simulation of the co-transport and reaction of bio-nHAP with Pb(II) using T-FBRE and had a great benefit for risk assessment and remediation strategy development for Pb(II) contaminated soil.

Biogenic nanoparticles Co-transport Environmental factors Fractional model Pb(II) Porous media

SCI ; EI

英语

其他

WOS:000647817200093

20211010037926

Flow velocity ; Heavy metals ; Hydroxyapatite ; Integrated circuits ; Ionic strength ; Nanocomposites ; Porous materials ; Reaction kinetics ; Remediation ; Risk assessment ; Soil pollution ; Stochastic systems ; Velocity

Environmental Impact and Protection:454.2 ; Soils and Soil Mechanics:483.1 ; Metallurgy and Metallography:531 ; Fluid Flow:631 ; Semiconductor Devices and Integrated Circuits:714.2 ; Nanotechnology:761 ; Physical Chemistry:801.4 ; Chemical Reactions:802.2 ; Inorganic Compounds:804.2 ; Accidents and Accident Prevention:914.1 ; Solid State Physics:933 ; Materials Science:951 ; Systems Science:961

ENVIRONMENT/ECOLOGY

2-s2.0-85101966205

Scopus

1.State Key Laboratory of Hydrology-Water Resources and Hydraulic Engineering,College of Mechanics and Materials,Hohai University,Nanjing,210098,China
2.School of Environment,Nanjing Normal University,Nanjing,210023,China
3.Department of Geological Sciences,University of Alabama,Tuscaloosa,35487,United States
4.U.S. Geological Survey,Moffett Field,94035,United States
5.State Environmental Protection Key Laboratory of Integrated Surface Water-Groundwater Pollution Control,School of Environmental Science & Engineering,Southern University of Science and Technology,Shenzhen,518055,China

Zhou，Dongbao,Han，Xuan,Zhang，Yong,et al. Co-transport of biogenic nano-hydroxyapatite and Pb(II) in saturated sand columns: Controlling factors and stochastic modeling[J]. CHEMOSPHERE,2021,275.

Zhou，Dongbao.,Han，Xuan.,Zhang，Yong.,Wei，Wei.,Green，Christopher T..,...&Zheng，Chunmiao.(2021).Co-transport of biogenic nano-hydroxyapatite and Pb(II) in saturated sand columns: Controlling factors and stochastic modeling.CHEMOSPHERE,275.

Zhou，Dongbao,et al."Co-transport of biogenic nano-hydroxyapatite and Pb(II) in saturated sand columns: Controlling factors and stochastic modeling".CHEMOSPHERE 275(2021).