Diffusion of hexavalent chromium in chromium-containing slag as affected by microbial detoxification

Wang, Yunyan; Yang, Zhihui; Chai, Liyuan; Zhao, Kun

doi:10.1016/j.jhazmat.2009.04.060

Cited by 25 publications

(10 citation statements)

References 10 publications

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“…The accumulated amount of chromium-containing slag discharged from chemical industries was more than 6 million tons over a span of more than 30 years. Of these 6 million tons, about 4 million tons were simply deposited (Wang et al, 2009). Moreover, it is estimated that 200,000 to 300,000 tons of chromium-containing slag are being discharged annually (SEPA, 2005) and have become a serious pollution problem in soil and groundwater.…”

Section: Introductionmentioning

confidence: 99%

Static and Dynamic Leaching of Chromium(VI) from Chromium-Containing Slag

Wang

Yang

et al. 2012

Environmental Engineering Science

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Because the slag can be a major source of soil and groundwater pollution, understanding the release and leaching behavior of hexavalent chromium [Cr(VI)], from chromium-containing slag is critical. We report Cr(VI) behavior after static and dynamic leaching from chromium-containing slag deposited at a ferro-alloy manufacturing plant in Hunan province, China. Bench-scale experiments indicate that the main factors influencing the dissolution release of Cr(VI) include the solid-liquid ratio, soak time, agitation, acidity, particle size, and water dynamic flow. Based on the parameters obtained from the dynamic leaching experiment, a Cr(VI) release and leaching model was developed and applied to the study area. The model can quantitatively predict the extent of Cr(VI) pollution of soil and groundwater under atmospheric precipitation.

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Section: Introductionmentioning

confidence: 99%

Static and Dynamic Leaching of Chromium(VI) from Chromium-Containing Slag

Wang

Yang

et al. 2012

Environmental Engineering Science

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“…The accumulated amount of chromium-containing slag discharged from metallurgical and chemical industries over a span of more than 30 years was more than 6 million tons, and 200-300 thousand tons are being discharged annually [6,7]. In China, most Cr industry operations lack appropriate disposal facilities, and hence, chromium-containing wastes has become a serious problem as a contaminant in soils.…”

Section: Introductionmentioning

confidence: 99%

Environmental impact and site-specific human health risks of chromium in the vicinity of a ferro-alloy manufactory, China

Wang

Chen

Chai

et al. 2011

Journal of Hazardous Materials

100

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“…As the main hazardous substance, chrome exists in the form of Cr(III) or Cr(VI) in the chromium-containing alumina sludge, and Cr(VI) is considered to be the dominant pollutant due to its carcinogenicity [26]. At present, the solution pollution of the chromium-containing alumina sludge is mainly detoxicated and utilized.…”

Section: Introductionmentioning

confidence: 99%

Preparation of Alumina Nanorods from Chromium-Containing Alumina Sludge

Zhang

Deng²,

Sun

et al. 2017

Nanoscale Res Lett

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Alumina nanorods were prepared from chromium-containing alumina sludge, and the effects of doping elements, such as Cr, Fe, and Mg, were researched. The results show that the crystal transformation of alumina is restricted by the doped Cr and facilitated by the doped Fe and Mg, which is transformed from θ-Al2O3 to α-Al2O3 in the calcination process. Meanwhile, the crystal transformation of alumina is strongly restrained by co-doped elements from the chromium-containing alumina sludge. The doped elements change the course of phase structure transformation and slightly transform the chemical bond of the alumina nanorods. The impure elements are doped in the alumina crystal and restrain the crystalline growth of alumina nanorods according to the rules. In the sample prepared from chromium-containing alumina sludge, more Cr and Mg but fewer Fe are doped, and most Cr are existed as Cr(III). It is possible that the Fe-doping is confined by the competition of Cr and Mg. Moreover, the lattice imperfection of alumina is caused by doped ions, such as Cr, Fe, and Mg, and the chemical state of O and Al are affected. The findings by these experiments provide essential information for eliminating pollution and promoting comprehensive utilization of the chromium-containing alumina sludge.

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Diffusion of hexavalent chromium in chromium-containing slag as affected by microbial detoxification

Cited by 25 publications

References 10 publications

Static and Dynamic Leaching of Chromium(VI) from Chromium-Containing Slag

Static and Dynamic Leaching of Chromium(VI) from Chromium-Containing Slag

Environmental impact and site-specific human health risks of chromium in the vicinity of a ferro-alloy manufactory, China

Preparation of Alumina Nanorods from Chromium-Containing Alumina Sludge

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