Dongdagou Ditch in Baiyin City was one of the key demonstration areas for remediation of heavy metal contamination in China. Solidification/stabilization (S/S) is an appropriate technology that has positive impact on both leaching and strength performance of the riverbed site. This field trial was designed to investigate the long-term S/S effects and mechanism of ordinary Portland cement (OPC) on Cd, Zn, and Pb co-contaminated soil in Dongdagou Ditch, and to evaluate the influence of groundwater and low temperature. Leaching tests showed that 8 wt.%-OPC could effectively stabilize Cd, Zn, and Pb by 99.9%, 99.4%, and 67.9%, respectively, higher compared with 5 wt.%-OPC treatment, and had long-term stability. The bearing capacities of the OPC-treated soil reached 0.75–0.92 Mpa and met the USEPA (United States Environmental Protection Agency) standard for landfill disposal. Cd, Zn, and Pb were chemically stabilized and physically encapsulated by OPC simultaneously, the unstable acid-extractable Cd and Zn in soil were transformed into residual fraction after OPC treatment, and insoluble sulfides such as PbS and ZnS were specially formed due to high groundwater table of the site. In this field trial, groundwater showed negative effects on both leaching and strength properties of the OPC-treated soil due to anaerobic conditions and structural damage of S/S products. The 5 wt.%-OPC S/S effects on Cd and Zn decreased to 72.3% and 63.4%, respectively, and the soil strength reduced by 0.08–0.11 MPa below groundwater table. On-site S/S remediation with OPC was insensitive to low temperature, so that it was suitable for application in the cold Northwest China.
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References
1.
AlpaslanB., and YukselenM.A. (2002). Remediation of lead contaminated soils by stabilization/solidification. Water Air Soil Pollut. 133, 253.
2.
BatchelorB. (2006). Overview of waste stabilization with cement. Waste Manage. 26, 689.
3.
BSI. (2005). BS EN 196-3:2005. Methods of Testing Cement, Part 3: Determination of Setting Times and Soundness. British Standards Institution.
4.
ChenQ.Y., HillsC.D., TyrerM., SlipperI., ShenH.G., and BroughA. (2007). Characterisation of products of tricalcium silicate hydration in the presence of heavy metals. J. Hazard. Mater. 147, 817.
5.
ChenQ.Y., TyrerM., HillsC.D., YangX.M., and CareyP. (2009). Immobilisation of heavy metal in PC-based solidification/stabilisation: A review. Waste Manage. 29, 390.
6.
CNRA. (2003). TB10018-2003. Code for In-Situ Measurement of Railway Engineering Geology. National Railway Administration of China.
El-EswedB.I., AldagagO.M., and KhaliliF.I. (2017). Efficiency and mechanism of stabilization/solidification of Pb(II), Cd(II), Cu(II), Th(IV) and U(VI) in metakaolin based geopolymers. Appl. Clay Sci. 140, 148.
9.
FalcigliaP.P., CannataS., RomanoS., and VagliasindiF.G.A. (2014). Stabilisation/solidification of radionuclide polluted soils—Part I: Assessment of setting time, mechanical resistance, gamma-radiation shielding and leachate gamma-radiation. J. Geochem. Explor. 142, 104.
10.
FiedlerS., VepraskasM.J., and RichardsonJ.L. (2007). Soil redox potential: Importance, field measurements, and observations. Adv. Agron. 94, 1.
11.
FuessleR.W., and TaylorM.A. (2004). Long-term solidification/stabilization and toxicity characteristic leaching procedure for an electric arc furnace dust. J. Environ. Eng. 130, 492.
12.
GiergicznyZ., and KrolA. (2008). Immobilization of heavy metals (Pb, Cu, Cr, Zn, Cd, Mn) in the mineral additions containing concrete composites. J. Hazard. Mater. 160, 247.
13.
GineysN., AouadG., and DamidotD. (2010). Managing trace elements in Portland cement—Part I: Interactions between cement paste and heavy metals added during mixing as soluble salts. Cement Concrete Comp. 32, 563.
14.
HalimC.E., AmalR., BeydounD., ScottJ.A., and LowG. (2003). Evaluating the applicability of a modified toxicity characteristic leaching procedure (TCLP) for the classification of cementitious wastes containing lead and cadmium. J. Hazard. Mater. 103, 125.
15.
HusemM., and GozutokS. (2005). The effects of low temperature curing on the compressive strength of ordinary and high performance concrete. Constr. Build. Mater. 19, 49.
16.
KakaliG., and ParissakisG. (1995). Investigation of the effect of Zn oxide on the formation of portland-cement clinker. Cement Concrete Res. 25, 79.
17.
KaramalidisA.K., and VoudriasE.A. (2009). Leaching and immobilization behavior of Zn and Cr from cement-based stabilization/solidification of ash produced from incineration. Environ. Eng. Sci. 26, 81.
18.
KatsiotiM., KatsiotisN., RouniG., BakirtzisD., and LoizidouM. (2008). The effect of bentonite/cement mortar for the stabilization/solidification of sewage sludge containing heavy metals. Cement Concrete Comp. 30, 1013.
19.
KimY., LeeK., BangJ., and KwonS. (2014). Effect of W/C ratio on durability and porosity in cement mortar with constant cement amount. Adv. Mater. Sci. Eng. 2014, 1.
20.
KogbaraR.B. (2014). A review of the mechanical and leaching performance of stabilized/solidified contaminated soils. Environ. Rev. 22, 66.
21.
KogbaraR.B., and Al-TabbaaA. (2011). Mechanical and leaching behaviour of slag-cement and lime-activated slag stabilised/solidified contaminated soil. Sci. Total Environ. 409, 2325.
22.
KogbaraR.B., Al-TabbaaA., YiY., and StegemannJ.A. (2012). pH-dependent leaching behaviour and other performance properties of PC-treated mixed contaminated soil. J. Environ. Sci. 24, 1630.
23.
Lasheras-ZubiateM., Navarro-BlascoI., FernandezJ.M., and AlvarezJ.I. (2012). Encapsulation, solid-phases identification and leaching of toxic metals in cement systems modified by natural biodegradable polymers. J. Hazard. Mater. 233, 7.
24.
LeeD. (2007). Formation of leadhillite and calcium lead silicate hydrate (C-Pb-S-H) in the solidification/stabilization of lead contaminants. Chemosphere, 66, 1727.
25.
LiZ., MaZ., van der KuijpT.J., YuanZ., and HuangL. (2014). A review of soil heavy metal pollution from mines in China: Pollution and health risk assessment. Sci. Total Environ. 468, 843.
26.
LinZ.Z., WangZ., HuY.F., LiuY.L., and XuJ. (2017). Mechanical properties of cement-solidified oily sludge. Environ. Eng. Sci. 34, 607.
27.
MalviyaR., and ChaudharyR. (2006). Factors affecting hazardous waste solidification/stabilization: A review. J. Hazard. Mater. 137, 267.
28.
MEPC. (1996). GB8978-1996. Integrated Wastewater Discharge Standard. Ministry of Environmental Protection of China.
29.
MEPC. (2007). HJ/T 299-2007. Solid Waste—Extraction Procedure for Leaching Toxicity—Sulphuric Acid & Nitric Acid Method. Ministry of Environmental Protection of China.
30.
MoonD.H., LeeJ., GrubbD.G., and ParkJ. (2010). An assessment of Portland cement, cement kiln dust and Class C fly ash for the immobilization of Zn in contaminated soils. Environ. Earth Sci. 61, 1745.
31.
MulliganC.N., YongR.N., and GibbsB.F. (2001). Remediation technologies for metal-contaminated soils and groundwater: An evaluation. Eng. Geol. 60, 193.
32.
MuratM., and SorrentinoF. (1996). Effect of large additions of Cd, Pb, Cr, Zn, to cement raw meal on the composition and the properties of the clinker and the cement. Cement Concrete Res. 26, 377.
33.
PariaS., and YuetP.K. (2006). Solidification-stabilization of organic and inorganic contaminants using portland cement: A literature review. Environ. Rev. 14, 217.
34.
ParkC.K. (2000). Hydration and solidification of hazardous wastes containing heavy metals using modified cementitious materials. Cement Concrete Res. 30, 429.
35.
PoonC.S., PetersC.J., PerryR., BarnesP., and BarkerA.P. (1985). Mechanisms of metal stabilization by cement based fixation processes. Sci. Total Environ. 41, 55.
36.
RauretG., Lopez-SanchezJ.F., SahuquilloA., RubioR., DavidsonC., UreA., and QuevauvillerP. (1999). Improvement of the BCR three step sequential extraction procedure prior to the certification of new sediment and soil reference materials. J. Environ. Monit. 1, 57.
RoseJ., MoulinI., HazemannJ.L., MasionA., BertschP.M., BotteroJ.Y., MosnierF., and HaehnelC. (2000). X-ray absorption spectroscopy study of immobilization processes for heavy metals in calcium silicate hydrates: 1. Case of lead. Langmuir, 16, 9900.
39.
SanchezF., BarnaR., GarrabrantsA., KossonD.S., and MoszkowiczP. (2000). Environmental assessment of a PC-based solidified soil contaminated with lead. Chem. Eng. Sci. 55, 113.
40.
ShawabkehR.A. (2005). Solidification and stabilization of cadmium ions in sand-cement-clay mixture. J. Hazard. Mater. 125, 237.
41.
SobieckaE., ObraniakA., and Antizar-LadislaoB. (2014). Influence of mixture ratio and pH to solidification/stabilization process of hospital solid waste incineration ash in Portland cement. Chemosphere, 111, 18.
42.
USEPA. (1986). EPA/530-SW-86-016. Prohibition on the Disposal of Bulk Liquid Hazardous Waste in Landfills—Statutory Interpretive Guidance. Washington DC: Office of Solid Waste and Emergency Response.
43.
USEPA. (1996). SW-846 Test Method 3052. Microwave Assisted Acid Digestion of Siliceous and Organically Based Matrices. Washington DC: USEPA.
44.
USEPA. (2004). Treatment Technologies for Site Cleanup, 11th ed. Washington DC: Office of Solid Waste and Emergency Response.
45.
VoglarG.E., and LestanD. (2010). Solidification/stabilisation of metals contaminated industrial soil from fromer Zn smelter in Celje, Slovenia, using cement as a hydraulic binder. J. Hazard. Mater. 178, 926.
46.
WTC. (1991). Report EPS 3/HA/9. Proposed Evaluation Protocol for Cement-Based Solidified Wastes. Environment Canada: Wastewater Technology Centre.
47.
YinC., Bin MahmudH., and ShaabanM.G. (2006). Stabilization/solidification of lead-contaminated soil using cement and rice husk ash. J. Hazard. Mater. 137, 1758.
48.
YousufM., MollahA., VempatiR.K., LinT.C., and CockeD.L. (1995). The interfacial chemistry of solidification/stabilization of metals in cement and pozzolanic material systems. Waste Manage. 15, 137.
49.
YukselenM.A., and AlpaslanB. (2001). Leaching of metals from soil contaminated by mining activities. J. Hazard. Mater. 87, 289.
