Sorption of paddy soil-derived dissolved organic matter on hydrous iron oxide–vermiculite mineral phases

Sodano, Marcella; Said-Pullicino, Daniel; Fiori, Antonio F.; Catoni, Marcella; Martín, María; Celi, Luisella

doi:10.1016/j.geoderma.2015.07.014

Cited by 42 publications

(29 citation statements)

References 48 publications

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“…Hence, a more likely explanation is sorption to mineral surfaces. Laboratory sorption experiments support this view; a typical observation is that aromatic DOM components are preferentially sorbed by minerals and soils (Davis and Gloor, 1981;Jardine et al, 1989;McKnight et al, 1992;Dai et al, 1996;Zech, 1997, 2000;Chorover and Amistadi, 2001;Guo and Chorover, 2003;Kalbitz et al, 2005;Kawahigashi et al, 2006;Hunt et al, 2007;Mikutta et al, 2007;Jagadamma et al, 2012;Sodano et al, 2016), and for some soils it has been shown they displace previously bound organic components from mineral surfaces (Kaiser et al, 1996). The degree of preferential sorption may depend on the composition of the soil mineral assemblage.…”

Section: Argument 2: Preferential Stabilization Of Aromatic Dom Compomentioning

confidence: 96%

Gone or just out of sight? The apparent disappearance of aromatic litter components in soils

Klotzbücher

Kalbitz

Cerli

et al. 2016

SOIL

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Abstract. Uncertainties concerning stabilization of organic compounds in soil limit our basic understanding on soil organic matter (SOM) formation and our ability to model and manage effects of global change on SOM stocks. One controversially debated aspect is the contribution of aromatic litter components, such as lignin and tannins, to stable SOM forms. In the present opinion paper, we summarize and discuss the inconsistencies and propose research options to clear them.Lignin degradation takes place stepwise, starting with (i) depolymerization and followed by (ii) transformation of the water-soluble depolymerization products. The long-term fate of the depolymerization products and other soluble aromatics, e.g., tannins, in the mineral soils is still a mystery. Research on dissolved organic matter (DOM) composition and fluxes indicates dissolved aromatics are important precursors of stable SOM attached to mineral surfaces and persist in soils for centuries to millennia. Evidence comes from flux analyses in soil profiles, biodegradation assays, and sorption experiments. In contrast, studies on composition of mineral-associated SOM indicate the prevalence of non-aromatic microbial-derived compounds. Other studies suggest the turnover of lignin in soil can be faster than the turnover of bulk SOM. Mechanisms that can explain the apparent fast disappearance of lignin in mineral soils are, however, not yet identified.The contradictions might be explained by analytical problems. Commonly used methods probably detect only a fraction of the aromatics stored in the mineral soil. Careful data interpretation, critical assessment of analytical limitations, and combined studies on DOM and solid-phase SOM could thus be ways to unveil the issues.

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Section: Argument 2: Preferential Stabilization Of Aromatic Dom Compomentioning

confidence: 96%

Gone or just out of sight? The apparent disappearance of aromatic litter components in soils

Klotzbücher

Kalbitz

Cerli

et al. 2016

SOIL

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“…It is deduced that only partial La 3+ was intercalated into the interlayer of the vermiculite owing to the small available space. On the other side, La(III)‐OH cations were likely attracted onto the negatively charged vermiculite in water by Coulombic force; this promoted the localized clustering and precipitation of La(OH) 3 . Therefore, an increasing amount of La(OH) 3 is observed to form from LaRV‐0.025 to LaRV‐0.4.…”

Section: Resultsmentioning

confidence: 97%

“…Therefore, an increasing amount of La(OH) 3 is observed to form from LaRV‐0.025 to LaRV‐0.4. Similar result was reported by modifying vermiculite with Fe (hydr)oxide …”

Section: Resultsmentioning

confidence: 97%

“…environmental toxicity. The modification of natural vermiculite using metal or metal‐based materials may be an effective solution; in our literature search, only a little research has been performed in this field of adsorptive removal of organic pollutants. Sodano and co‐workers found that the Fe loading affected the adsorption amount of organic matters; that the Fe (hydr)oxide‐modified vermiculite adsorbent (prepared with 2.8 mol Fe kg −1 ) showed the highest adsorption capacity (67 mg C g −1 ), but this decreased drastically by 57–63% when further increasing Fe loadings …”

Section: Introductionmentioning

confidence: 99%

“…Sodano and co-workers found that the Fe loading affected the adsorption amount of organic matters; that the Fe (hydr)oxidemodified vermiculite adsorbent (prepared with 2.8 mol Fe kg À1 ) showed the highest adsorption capacity (67 mg C g À1 ), but this decreased drastically by 57-63% when further increasing Fe loadings. [31] Lanthanum oxides or hydroxides have been proved to be effective in wastewater treatment, with remarkable adsorption capability to remove organic dye from water. [32][33][34] Layered-lanthanum crystalline nanowires, consisting of a structure with [La 4 (OH) 10 (H 2 O) 4 ] 2+ cationic layers, were reported to have a superior total adsorption capacity of 470 mg·g À1 to CR.…”

Section: Introductionmentioning

confidence: 99%

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La‐modified vermiculites for efficient adsorption of Congo red

Huang

2017

Asia-Pacific J Chem Eng

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In this study, we utilized lanthanum to modify vermiculite (RV) targeting at high dye removal and superior reusability. La‐modified RV materials were synthesized; followed by detailed characterizations and adsorption studies. Compared with the BET surface area (SBET) of RV (2.98 m2·g−1), those of La‐modified RV samples were increased by up to 8 times. Their adsorption performances were investigated by employing Congo red (CR) as the target pollutant in aqueous solution. An increasing loading of La in RV led to enhanced CR removal capacity. The experimental equilibrium data of the La‐modified RV were fitted better by using the Freundlich model than the Langmuir model. At the same initial concentration of 100 mg·L−1, the equilibrium capacity of CR was 32.3–80.5 mg·g−1 using the La‐modified RV adsorbents, which was 2.5–7.8 times greater than that using RV (9.1 mg·g−1). Meanwhile, the adsorption kinetics was analysed by the pseudo‐first‐order, pseudo‐second‐order and intra‐particle diffusion models; the kinetics followed the pseudo‐second‐order model best and the intra‐particle diffusion was not the only rate limiting step during adsorption. Superior adsorption capacity of LaRV‐0.2, which possessed 29.93 wt% La loading, was observed in the pH range of 3–9; especially the high removal rate (~94%) was observed when pH = 3. The removal rate was increased to ~96.8% in the presence of NaCl compared with 91.6% in the absence of NaCl. The as‐synthesized adsorbent maintained a superior adsorption capacity after four adsorption–desorption cycles. The capacity of the regenerated adsorbent in the fourth adsorption–desorption cycle was only 4.2% lower than that of the fresh LaRV‐0.2 sample, suggesting great potential in practical wastewater treatment. © 2017 Curtin University and John Wiley & Sons, Ltd.

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Fe‐modified biochar improved the stability of soil aggregates and organic carbon: Evidence from enzymatic activity and microbial composition

Chen,

Wu,

Ding

et al. 2023

Land Degrad Dev

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Biochar modifications are used to improve soil organic carbon (SOC) content, while its effects on soil structure stability and carbon (C) mineralization are less known especially in saline–alkaline soils. A 5 years field experiment was arranged with organic amendments addition in the Yellow River Delta, including (i) NPK, only 255, 56, and 190 kg ha−1 N, P, and K each year, (ii) RS, NPK + rice straw, (iii) BC, NPK + straw‐derived biochar, and (iv) FeBC, NPK + biochar modified with ferric chloride. Relative to NPK treatment, the mean weight diameter was significantly increased with organic amendments addition, which was the highest in FeBC treatment. Meanwhile, SOC content in the soil added with organic amendment was increased by 2%–18%. Compared with the RS and BC, FeBC addition increased the content of stable humin (HU), crystalline Fe oxides (Fed), and amorphous Fe oxides (Feo). There was a positive correlation between HU and Feo/Fed, indicating HU and Fe oxides might form organic mineral complexes to limit SOC biodegradation. While the mineralization rate of SOC in FeBC treatment was decreased by more than 30.4% than that in BC treatment. This might be due to the decrease of soil β‐glucosidase and cellobiohydrolase activities, as well as the abundance of Gammaproteobacteria and Actinobacteria. These results were the mechanism of soil enzyme activity and bacterial community regulating C stability. Therefore, Fe‐modified biochar is a better organic amendment to improve the stability of aggregates structure and SOC in saline–alkaline paddy soil.

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Sorption of paddy soil-derived dissolved organic matter on hydrous iron oxide–vermiculite mineral phases

Cited by 42 publications

References 48 publications

Gone or just out of sight? The apparent disappearance of aromatic litter components in soils

Gone or just out of sight? The apparent disappearance of aromatic litter components in soils

La‐modified vermiculites for efficient adsorption of Congo red

Fe‐modified biochar improved the stability of soil aggregates and organic carbon: Evidence from enzymatic activity and microbial composition

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