Page 67 - 2016地大报告-电子书

环境学院发展报告

CX (Liu, Chongxuan) [ 1,2,3 ] ; Li, JX (Li, Junxia) [ 1,2 ] ;Zhu, YP (Zhu, Yapeng) [ 1,2 ] ; Su, CL (Su,

Chunli) [ 1,2 ] ; Ma, T (Ma, Teng) [ 1,2 ] ; Wang, YX (Wang, Yanxin) [ 1,2 ]
JOURNAL OF HAZARDOUS MATERIALS 卷 : 302 页 : 19-26 出版年 :JAN 25 2016

摘 要 ： An aquifer Fe-coating technology was evaluated for in-
situ As remediation. The groundwater in the aimed aquifer has low dissolved Fe(II)

concentration and high As(III) concentration, which has a low affinity toward Fe-oxides/
hydroxides. To overcome these challenges, dissolved Fe(II) (5.0 mM) and NaClO (2.6 mM)

were injected into the studied aquifer to promote the formation of Fe oxides/hydroxides and to
oxidize As(III) into As(V), thus removing aqueous As via adsorption and/or co-precipitation.

During field experiment, As concentration in groundwater from the pumping well significantly
decreased. Fe and As speciation calculations indicate that incorporation of negatively

charged As(V) into goethite was the probable mechanism for As removal. Both chemical
sequential extraction results and spectroscopic data also support that alternating injection of

Fe(II) and NaClO can achieve aquifer Fe coating and immobilize As via adsorption onto Fe
oxides/hydroxides. Geochemical modelling further confirms that although competition for

sorption sites between As and other dissolved species is expected in the natural groundwater
system, high surface area ofthe Fe oxides/hydroxides can provide sufficient sites for

As retention. The ability to effectively decrease As concentration of in-situ aquifer Fe-
coatingtechnology indicates that this approach should have extensive applicability to similar

high As groundwater occurred worldwide. (C) 2015 Elsevier B.V. All rights reserved.
论文链接：https://doi.org/10.1016/j.jhazmat.2015.09.055

3．Intrawellbore kinematic and frictional losses in a horizontal well in a bounded c
onfinedaquifer

作 者：Wang, QR ( 王全荣 ) [ 1,2 ] ; Zhan, HB (Zhan, Hongbin) [ 2,3 ]
Water Resources Research Volume 53, Issue 1 January 2017 Pages 127–141

摘 要 ：Horizontal drilling has become an appealing technology for water resource
exploration or aquifer remediation in recent decades, due to decreasing operational cost and

many technical advantages over vertical wells. However, many previous studies on flow
into horizontal wells were based on the Uniform Flux Boundary Condition (UFBC), which

does not reflect the physical processes of flow inside the well accurately. In this study, we
investigated transient flow into a horizontal well in an anisotropic confined aquifer latera

lly bounded by two constant-head boundaries. Three types of boundary conditions were

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