Influence of soil pH on the fractionation of Cr, Cu and Zn in solid phases from a landfill site

Zinc distribution in soils amended with different kinds of sewage sludge

“…We conclude that the transformation of raw OM to stable humic substances with time favoured the complexation of sludge-borne Zn onto stable organic forms regardless soil pH. Moreover, the importance of pH in controlling the solubility and retention of Zn by soils has been investigated continuously without reaching a definitive understanding of its effect on retention mechanisms in the presence of organic C found in waste materials (Mun˜oz-Mele´ndez et al, 2000).…”

Metal-Tolerant Fungal Communities Are Delineated by High Zinc, Lead, and Copper Concentrations in Metalliferous Gobi Desert Soils

“…In generalbased on idealized laboratory observations of the chemistry and solubility of metal salts -each unit increase in pH is forecast to result in halving of available concentrations [75][76][77][78]. As the average pH of the soils which contained high metals was 8.66, having a pH range between 8.43 to 8.87 ( Supplementary Table S2), the actual bioavailability would be predicted to be lower than in neutral or acidic soils [79,80]. Exactly how much soil pH affects metal ion availability in actual soils is uncertain: Smolders et al [63] found that over a range of pH from 4.5 to 7.5, Zn toxicity effects on soil microbes were unaffected by pH, suggesting that the theoretical limits are inaccurate.…”

The role of chemometrics in single and sequential extraction assays: A Review. Part II. Cluster analysis, multiple linear regression, mixture resolution, experimental design and other techniques

“…The aims of such studies were: i) the implementation of site-specific agricultural management practices in order to lower costs, increase crop yields and/or improve sustainable agricultural land use [39][40][41][42][43][44]; ii) the identification of the characteristics (e.g. parent material, slope gradient, land use, presence of vegetation, fertilizer input) most extensively affecting soil composition [45][46][47][48][49]; iii) the investigation of other phenomena, such as: the short term effects of wildfire [50]; the difference in spatial patterns before and after poultry litter application [51]; the relationship between spatial dependence in oak leaves and in soil, which can have important consequences for herbivores and nutrient cycling in the ecosystem [52]; the soil properties at a forest-prairie boundary and the effect of woody plant expansion on it [53]; the effect of soil composition on rice growth and nutrient content [42]; the sorption of P from waters in riparian wetlands [54]; the effect of pH variability on element fractionation [55].…”