Page 70 - 2016地大报告-电子书

2016

CX (Liu, Chongxuan )[ 1,2,3 ] ; Li, JX (Li, Junxia) [ 1,2 ] ;Duan, MY (Duan, Mengyu) [ 1,2 ] ; Wang,

YX ( 王焰新 ) [ 1,2 ]
JOURNAL OF HYDROLOGY 卷 : 534 页 : 42-49 出版年 : MAR 2016

摘 要：An in situ Fe-sulfide coating approach has been developed for As-

contaminated groundwater remediation. Alternate injection of Fe(II), O-2-free water and
S2- can realize Fe-sulfide coating onto quartz sands with minor changes in porosity. As(III)

uptake experiment indicated that the retardation factor for As(III) was 37 and dynamic
retention capacity was 44.94 mg As(III)/g Fe, which was much higher than the maximum

adsorption capacityfor As(III) by FeS and FeS2. This result indicated that adsorption cannot
be the only mechanism for As(III) uptake by Fe-sulfide coating layer. The SEM image

and FTIR spectra results suggested that interaction between As(III) and Fe-sulfides and
formation of As-sulfide precipitates could significantly contribute to As(III) uptake by Fe-

sulfide coating layer. Alternate injection of Fe(II) + As (III) and S2- was conducted to
simulate in situAs immobilization from real groundwater. The SEM image showed that the

quartz sands were mainly covered by crystalline framboidal pyrite after such amendment.
The breakthrough of As(III) was not observed during this experiment and the removal capaci

ty for As(III) was 109.7 mg As/g Fe. The As(III) immobilization mechanism during alternate
injection of Fe (II) + As(III) and S2- was significantly different from that of As(III) uptake

by Fe-sulfide coating. The direct interaction between As(III) and S2- produced As-iulfides
contributed to the high As(III) removal capacity during alternate injection of Fe(II) + As(III)

and S2-. This result indicated that alternate injection of Fe(II) and S-2-approach has an
attractive application for As-contaminated groundwater remediation under strongly reducing e

nvironment. 2016 Elsevier B.V. All rights reserved.
论文链接：https://doi.org/10.1016/j.jhydrol.2015.12.057

7. Lattice Boltzmann simulation of water isotope fractionation during ice crystal
growth in clouds

[ 1 ]
作 者：Lu, GP ( 卢国平 ) ; DePaolo, DJ (DePaolo, Donald J.) [ 2,3 ]
GEOCHIMICA ET COSMOCHIMICA ACTA 卷 : 180 页 :271-283 出 版 年 :MAY 1

2016

摘 要 ： W e describe a lattice Boltzmann (LB) method for
simulating water isotope fractionation during diffusion-limited ice crystal growth by
vapor deposition from water-oversaturated air. These conditions apply to

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