Cement based solidification/stabilization of arsenic-contaminated mine tailings

Choi, Won‐Ho; Lee, S.-R.; Park, J.-Y.

doi:10.1016/j.wasman.2008.11.008

Cited by 90 publications

(43 citation statements)

References 22 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…Even alkaline compounds, rice husk, ash, biosolids, compost, zeolite, iron as well as manganese oxides were used as soil amendments to stabilize Pb (Castaldi et al 2005 ;Brown et al 2005 ;Yin et al 2006 ). The optimal cement binder content (5 %) to solidify or stabilize more than 85 % As in abandoned mine tailings was suggested by Choi et al ( 2009 ). More than 95 % S/S of hazardous radioactive wastes using alkali activated cements was achieved by Shi and Fernandez-Jimenez ( 2006 ).…”

Section: Solidifi Cation/stabilizationmentioning

confidence: 99%

Ex-Situ Remediation Technologies for Environmental Pollutants: A Critical Perspective

Kuppusamy

Thavamani

Megharaj

et al. 2016

Reviews of Environmental Contamination and Toxicology

View full text Add to dashboard Cite

Pollution and the global health impacts from toxic environmental pollutants are presently of great concern. At present, more than 100 million people are at risk from exposure to a plethora of toxic organic and inorganic pollutants. This review is an exploration of the ex-situ technologies for cleaning-up the contaminated soil, groundwater and air emissions, highlighting their principles, advantages, deficiencies and the knowledge gaps. Challenges and strategies for removing different types of contaminants, mainly heavy metals and priority organic pollutants, are also described.

show abstract

Section: Solidifi Cation/stabilizationmentioning

confidence: 99%

Ex-Situ Remediation Technologies for Environmental Pollutants: A Critical Perspective

Kuppusamy

Thavamani

Megharaj

et al. 2016

Reviews of Environmental Contamination and Toxicology

View full text Add to dashboard Cite

show abstract

“…Jakubick et al (2003) reported that tailings production in the mining industry increased from tens of thousands of tonnes of tailings produced per day in the 1960s to hundreds of thousands of them in the 2000s. Besides the volume of tailings and also the environmental concerns of toxic elements in tailings, many researchers have investigated the characteristics, chemical forms, and cleanup technology of the tailings (Lee et al 2001;Jung 2001;Jakubick et al 2003;Moncur et al 2005;Choi et al 2009). …”

Section: Introductionmentioning

confidence: 99%

“…Therefore, removal or decreasing solubility of As and heavy metals in tailings is necessary. Various removal technologies for As and heavy metals in soils and tailings were reported including biological leaching (Bayard et al 2006), electrokinetic method (Kim et al 2005), phytoremediation (Lasat 2002), and solidification and/or stabilization (Jang and Kim 2000;Singh and Pant 2006;Choi et al 2009). Among these technologies, the United States Environmental Protection Agency (USEPA) recognized cementitious solidification as the ''best demonstrated available technology (BDAT)'' for land disposal of most toxic elements (Singh and Pant 2006).…”

Section: Introductionmentioning

confidence: 99%

“…In order to reduce the solubility of arsenic and heavy metals in tailings, solidification of As and heavy metals in soils and tailings from mining areas is one of the most popular methods for heavy metal cleaning technologies, which can solidify the environmental contaminants with solidified materials including cement, pozzolan, steel slag, and so on (Dutre and Vandecasteele 1998;Jang and Kim 2000;Bose and Sharma 2002;Jakubick et al 2003;Singh and Pant 2006;Choi et al 2009). Singh and Pant (2006) reported that Portland cement, fly ash, and polymeric materials were effective technologies for the solidification of arsenic containing solid wastes.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Solidification of arsenic and heavy metal containing tailings using cement and blast furnace slag

Kim

Jung

2010

Environ Geochem Health

View full text Add to dashboard Cite

The objective of this study is to examine the solidification of toxic elements in tailings by the use of cement and blast furnace slag. Tailings samples were taken at an Au-Ag mine in Korea. To examine the best mixing ratio of tailings and the mixture of ordinary Portland cement (OPC) and blast furnace slag (SG) of 5:5, 6:6, 7:3, and 8:2, the 7:3 ratio of tailings and OPC+SG was adapted. In addition, the mixing ratios of water and OPC + SG were applied to 10, 20, and 30 wt%. After 7, 14, and 28 days' curing, the UCS test was undertaken. A relatively high strength of solidified material (137.2 kg cm⁻² in average of 3 samples) at 28 days' curing was found in 20 wt% of water content (WC). This study also examined the leachability of arsenic and heavy metals (Cd, Cu, Pb, and Zn) under the Korean Standard Leaching Test, and it showed that the reductions in leachabilities of As and heavy metals of solidified samples were ranged from 76 to 99%. Thus, all the solidified samples were within the guidelines for special and hazardous waste materials by the Waste Management Act in Korea. In addition, the result of freeze-thaw cycle test of the materials indicated that the durability of the materials was sufficient. In conclusion, solidification using a 7:3 mixing ratio of tailings and a 1:1 mixture of OPC + SG with 20% of WC is one of the best methods for the remediation of arsenic and heavy metals in tailings and other contaminated materials.

show abstract

“…?wr]t OL x@ uO}UQ w u}ovU C= Rri |w=L l=N |R=Ul=B w |R=Uy@ [10] '2009 p=U QO |WywSB QO u}vJty [9] "CU= xOW s=Hv= '2008 p=U QO w ?QU x@ xOwr; |=yl=N |xvwtv 'u=t}U OYQO …”

mentioning

confidence: 99%