Hydrolysis of Aluminum Ions in Kaolinite and Oxisol Suspensions as Influenced by Organic Anions

Xu, Runsheng; Xiao, Shuangcheng; Li, Jiu-yu; Tiwari, Diwakar; Ji, Guoliang

doi:10.1016/s1002-0160(07)60012-5

Cited by 7 publications

(3 citation statements)

References 17 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…However, soils at this site also contained a relatively high concentration of extractable Al, presumably in the form of aluminum sulfate salts ( Supplemental Table S1), which may indicate the continued oxidation of sulfide ore. The formation of aluminum salts in the 3.6 to 4.5 pH range is consistent with the release of H + ions during oxidation of sulfide ores, counteracting the effect of the dolostone (Xu et al, 2007;Jones et al, 2011). Alternatively, as these soils were exposed to sulfuric acid deposition, there should have been sufficient sulfate available to form Al 2 (SO 4 ) 3 .…”

Section: Effect Of Dolostone Application On Soil Phmentioning

confidence: 62%

Effects of Dolomitic Limestone Application on Zinc Speciation in Boreal Forest Smelter‐Contaminated Soils

et al. 2016

View full text Add to dashboard Cite

Anthropogenic activities at the HudBay Minerals, Inc., Flin Flon (Manitoba, Canada) mining and processing facility have severely affected the surrounding boreal forest ecosystem. Soil contamination occurred via a combination of metal and sulfuric acid deposition and has resulted in forest dieback and ineffective natural recovery. A community-led effort to revegetate areas of the landscape through the application of a dolomitic limestone has been met with varied success. Zinc (Zn) speciation has shown to be closely linked to the presence or absence of an invasive metal-tolerant grass species, with soils being broadly classed into two revegetation response groups. Group I, characterized by the absence of metal-tolerant grasses, and group II, characterized by the presence of metal-tolerant grasses. The systematic approach used to lime areas of the landscape produced a liming chronosequence for each group. This study used a combination of X-ray absorption spectroscopy, X-ray fluorescence mapping, and X-ray diffraction techniques to determine the effect of liming on Zn speciation in these chronosequences. Liming group I soils resulted in the formation of a neo-phase Zn-Al-hydroxy interlayer coprecipitate and subsequent rapid boreal forest revegetation. The effect of liming on Zn speciation on the group II soils resulted in a gradual transition of increasingly stable adsorption species, culminating with a stable Zn-Al-layered double hydroxide precipitate. Boreal forest vegetation has failed to recolonize group II soils during the study. However, the formation of the layered double hydroxide species resulted in a significant reduction in CaCl-extractable Zn. Further research is required to determine how to promote the revegetation of these soils.

show abstract

Section: Effect Of Dolostone Application On Soil Phmentioning

confidence: 62%

Effects of Dolomitic Limestone Application on Zinc Speciation in Boreal Forest Smelter‐Contaminated Soils

et al. 2016

View full text Add to dashboard Cite

show abstract

“…AAMs immersed in acid water exhibit patterns different from those in deionized water and saltwater. This is mainly because acid water can react with Al and Si ions in the AAM matrix, resulting in the formation of hydroxide complexes such as (Al(OH) 3 ) and (Si(OH) 4 ), oxide complexes such as (Al 2 Si 2 O 5 (OH) 4 ), also known as kaolinite, through hydrolysis reactions, , or even acid–base complexes. These complexes may exhibit characteristic peaks in FTIR spectra, which could be observed in the 900–1150 and 1350–1500 cm –1 regions of the spectrum, depending on their specific coordination environment and bonding configurations.…”

Section: Resultsmentioning

confidence: 99%

Sustainable Alkali-Activated Mortars for the Immobilization of Heavy Metals from Copper Mine Tailings

Maqbool,

Mobili,

Blasi

et al. 2023

ACS Sustainable Resour. Manage.

View full text Add to dashboard Cite

This study demonstrates a successful approach for immobilizing heavy metals in alkali-activated mortars (AAMs) by incorporating copper mine tailings (CMTs) and metakaolin (MK) as potential sources of aluminosilicates. Leachate concentrations of hazardous elements from AAM specimens were investigated up to 63 days of immersion in different solutions (pH = 4.5 and 7.0) using the static monolithic leaching method. Statistical analysis revealed that heavy metals such as Fe, Cu, Pb, and Cd were effectively immobilized in AAMs, contributing to the goal of mitigating environmental pollution. Moreover, the leaching of S was the highest in an acidic solution after 7 days (31 mg/L), while Si showed the highest concentration in an acidic solution after 28 days (18 mg/L). Sulfur exhibited a mean interval flux higher than those of Si and Al, indicating its faster release from AAMs. Although some elements were detected in relatively high concentration, such as Al in an acidic solution (16 mg/L), they fall within the non-enforceable guidelines set by the US Environmental Protection Agency (EPA), revealing that the manufactured AAMs can meet regulatory requirements. EDXS, FTIR, and XRD analyses provided valuable insights into the surface, chemical, and structural stabilities of AAMs, as well as the influence of pH, the presence of CMTs and MK, and the release of alkaline residues on leaching behavior.

show abstract

“…Active Al in soil, however, exerts important impacts on plant growth. When soil pH falls between 2 and 5, within the buffer range for Al, a large amount of active Al is released (Du & Tian 1996, Huang et al 2005, Xu et al 2007. Although some plants have already been discovered to be Al accumulators (Watanabe et al 1998, Jansen et al 2000, Xie et al 2002, there has been little documentation on rehabilitation or restoration of Al-contaminated soils using these plants on a large scale.…”

mentioning

confidence: 99%

Soil aluminium uptake and accumulation by Paspalum notatum

Huang

Hong

et al. 2009

Waste Manag Res

View full text Add to dashboard Cite

Paspalum notatum Flugge has been widely utilized for the purpose of ecological restoration of degraded land in the tropics and subtropics, where soil active aluminium (Al) is usually high as a result of acidification. Pot experiments were conducted to determine Al toxicity on P. notatum and to compare its potential to remove Al with another three plant species, Vetiveria zizanioides, Tristania conferta and Schima wallichii. In the Al addition experiment, the biomass of P. notatum and Al accumulation significantly decreased as the added Al concentration increased, but Al concentration in the plant markedly increased. A parallel experiment was conducted with the above four species, grown in lateritic soil and in oil shale waste containing high concentration of active Al. The biomasses of all four species were reduced obviously in the waste compared to in the soil. The effects of substrate on Al concentration, accumulation and translocation efficiency differed among species, and plants had significantly higher Al accumulation factors when grown in the soil than in the waste. Most of the Al taken up by P. notatum was transferred to above-ground parts; as a result, Al concentration in stems and leaves became quite high, over 1000 or even 3000 mg kg(-1); whereas for the other three species, Al concentration in shoots was much lower than in roots. Paspalum notatum was therefore much higher than the other three species with regard to Al translocation efficiency and therefore P. notatum may be regarded as both an effective Al hyper-accumulator and a potential Al hyper-remover.

show abstract

Hydrolysis of Aluminum Ions in Kaolinite and Oxisol Suspensions as Influenced by Organic Anions

Cited by 7 publications

References 17 publications

Effects of Dolomitic Limestone Application on Zinc Speciation in Boreal Forest Smelter‐Contaminated Soils

Effects of Dolomitic Limestone Application on Zinc Speciation in Boreal Forest Smelter‐Contaminated Soils

Sustainable Alkali-Activated Mortars for the Immobilization of Heavy Metals from Copper Mine Tailings

Soil aluminium uptake and accumulation by Paspalum notatum

Contact Info

Product

Resources

About