Sulfate adsorption and its relationships with properties of representative soils of the São Paulo State, Brazil

Alves, Marcelo Eduardo; Lavorenti, Arquimedes

doi:10.1016/s0016-7061(03)00186-1

Cited by 62 publications

(43 citation statements)

References 43 publications

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“…The relationship between soil pH and arsenate adsorption by a variety of soils cannot be compared with the results obtained by one single soil or soil mineral with the pH artificially changed. In the latter case, not only the soil pH but also some other soil properties could be changed concomitantly (Alves and Lavorenti, 2004). It is therefore hard to conclude that effects are solely caused by the soil pH.…”

Section: Discussionmentioning

confidence: 98%

Adsorption of arsenate on soils. Part 2: Modeling the relationship between adsorption capacity and soil physiochemical properties using 16 Chinese soils

Jiang

Zhang

Shan

et al. 2005

Environmental Pollution

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Citrate-dithionite extractable Fe has the most important positive influence on arsenate adsorption on soils. AbstractAn attempt has been made to elucidate the effects of soil properties on arsenate adsorption by modeling the relationships between adsorption capacity and the properties of 16 Chinese soils. The model produced was validated against three Australian and three American soils. The results showed that nearly 93.8% of the variability in arsenate adsorption on the low-energy surface could be described by citrate-dithionite extractable Fe (Fe CD ), clay content, organic matter content (OM) and dissolved organic carbon (DOC); nearly 87.6% of the variability in arsenate adsorption on the high-energy surface could be described by Fe CD , DOC and total arsenic in soils. Fe CD exhibited the most important positive influence on arsenate adsorption. Oxalate extractable Al (Al OX ), citratedithionite extractable Al (Al CD ), extractable P and soil pH appeared relatively unimportant for adsorption of arsenate by soils.

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Section: Discussionmentioning

confidence: 98%

Adsorption of arsenate on soils. Part 2: Modeling the relationship between adsorption capacity and soil physiochemical properties using 16 Chinese soils

Jiang

Zhang

Shan

et al. 2005

Environmental Pollution

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“…However, in this study, the clay contents did not appear as a variable in the regression equations between metal adsorption and the soil properties. One possibility could be the soil properties being changed concomitantly [30] and, therefore, the contribution of clay contents was reflected by other properties, such as the CEC. The contents of DOC in soils were very low comparing with the DOC in sewage sludge filtrate; therefore, its effect was insignificant.…”

Section: Discussionmentioning

confidence: 99%

Metal sorption on soils as affected by the dissolved organic matter in sewage sludge and the relative calculation of sewage sludge application

Liu

Zhang

et al. 2007

Journal of Hazardous Materials

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To evaluate the influences of sewage sludge-derived organic matters on metal sorption and on the resultant sludge loading estimates, a batch experiment was conducted to compare the sorption of Ni, Cu and Pb in sewage sludge filtrates (1:20 sewage sludge to water) on eight soils and the adsorption of metals in a reference solution which had the same matrix as the sewage sludge filtrate except dissolved organic material (henceforth referred to as reference solution). Metal sorption could be well fitted by linear isotherm and the dissolved organic matter in sludge significantly depressed the sorption (p < 0.01). The main factor controlling sorption of Ni on different soils was dominated by soil cation exchange capacity (CEC) and sorption of Cu and Pb was by soil organic matter (SOM). The parameters obtained from the sorption isotherm equations were then used to estimate sludge loadings into the soils. When the sorption parameters derived from the reference solution were used for calculation, that is the effect of dissolved organic matter was not considered, the calculated safe application rates are approximately 47.8, 51.4, 34.2, 31.3, 21.7, 46.3, 187.1 and 27.6 t-sludge/ha for the Beijing, Jiangxi, Xiamen, Jilin, Guangdong, Wuhan, Gansu and Xinjiang soils, respectively. However, when the sorption parameters derived from the dissolved organo-metallic complexes are used for calculation, the corresponding application rates are reduced to approximately 6.0, 3.4, 1.9, 10.0, 6.3, 3.6, 7.3 and 3.5 t-sludge/ha, respectively. By this study we can get a conclusion that the effect of sewage sludge derived dissolved organic matter on heavy metal sorption and soil properties should be considered in the course of regulating the safe application rates of sewage sludge to soil.

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“…The goodness of fitting of the above-mentioned models was verified using the approaches of Alves and Lavorenti (2004) by the following equation:…”

Section: Adsorption Models 271 Adsorption Isothermsmentioning

confidence: 99%

Mechanisms of competitive adsorption of Pb, Cu, and Cd on peat

Qin

Wen

Shan

et al. 2006

Environmental Pollution

231

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X-ray absorption spectroscopic study provided an evidence for the competitive adsorption mechanism of Pb, Cu, and Cd on peat. AbstractCombined use of batch equilibration adsorption and X-ray absorption spectroscopy (XAS) was employed to study the mechanisms of competitive adsorption of Pb, Cu, and Cd on Danish and Heilongjiang peat in single-and multi-solute systems. The adsorption capacity and initial adsorption rate on the same peat in single-solute systems followed the order Pb > Cu > Cd. Both the adsorbed amount of each metal (q 0 m ) and its initial adsorption rate were decreased in multi-solute systems. It was observed that the adsorbed amounts of metals at low-energy adsorption sites (q m,1 ) decreased pronouncedly compared to those at high-energy adsorption sites (q m,2 ), indicating that the competitive adsorption of Pb, Cu and Cd occurred mainly at the low-energy adsorption sites. XAS study revealed that both Pb and Cu were coordinated in peat predominantly to carboxylic moieties without excluding the hydroxyl groups, thereby providing an insight into the mechanism of competitive adsorption of Pb and Cu on peat.

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Sulfate adsorption and its relationships with properties of representative soils of the São Paulo State, Brazil

Cited by 62 publications

References 43 publications

Adsorption of arsenate on soils. Part 2: Modeling the relationship between adsorption capacity and soil physiochemical properties using 16 Chinese soils

Adsorption of arsenate on soils. Part 2: Modeling the relationship between adsorption capacity and soil physiochemical properties using 16 Chinese soils

Metal sorption on soils as affected by the dissolved organic matter in sewage sludge and the relative calculation of sewage sludge application

Mechanisms of competitive adsorption of Pb, Cu, and Cd on peat

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