Adsorption Properties of Subtropical and Tropical Variable Charge Soils: Implications from Climate Change and Biochar Amendment

Xu, Ren-kou; Qafoku, Nikolla P.; Ranst, Éric Van; Li, Jiu-yu; Jiang, Jun

doi:10.1016/bs.agron.2015.09.001

Cited by 62 publications

(40 citation statements)

References 184 publications

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“…The value and sign (positive or negative) of the zeta potential depend on the surface charges of the soil particles. The isoelectric point (IEP) indicates the pH value at which the zeta potential is 0 mV [ 33 ]. The zeta potentials of soil colloids were measured by electrophoresis using a Zetasizer Nano ZS particle size analyzer (ZEN3600, Malvern, Worcestershire, UK).…”

Section: Methodsmentioning

confidence: 99%

Impacts of long-term inorganic and organic fertilization on phosphorus adsorption and desorption characteristics in red paddies in southern China

et al. 2021

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Soil phosphorus (P) adsorption and desorption occur in an important endogenous cycle linked with soil fertility problems and relevant to the environmental risk assessment of P. In our study, the effect of long-term inorganic and organic fertilization on P adsorption and desorption characteristics in relation to changes in soil properties was evaluated by selecting three long-term experimental sites in southern China. The selected treatments at each site were CK (unfertilized), NPK (synthetic nitrogen, phosphorus and potassium) and NPKM (synthetic NPK plus manure). The adsorption and desorption characteristics of P were evaluated using Langmuir and Freundlich isotherms. The results showed that long-term application of NPK plus manure significantly increased soil organic carbon (SOC), total P and available P at all three sites compared with the NPK and CK treatments. All three treatments fit these equations well. The maximum adsorption capacity (Qm) of P increased with NPKM treatment, and the binding energy of P (K) and the maximum buffering capacity (MBC) showed increasing trends. NPKM showed the highest Qm (2346.13 mg kg-1) at the Jinxian site, followed by Nanchang (221.16 mg kg-1) and Ningxiang (2219.36 mg kg-1). Compared to CK and NPK, the NPKM treatment showed a higher MBC as 66.64, 46.93 and 44.39 L kg-1 at all three sites. The maximum desorption capacity (Dm) of P in soil was highest with the NPKM treatment (157.58, 166.76, 143.13 mg kg-1), showing a better ability to release P in soil. The correlation matrix showed a significant positive correlation of SOC, total and available P with Qm, Dm and MBC. In conclusion, it is suggested that manure addition is crucial to improve P utilization in red paddy soils within the recommended range to avoid the risk of environmental pollution.

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Section: Methodsmentioning

confidence: 99%

Impacts of long-term inorganic and organic fertilization on phosphorus adsorption and desorption characteristics in red paddies in southern China

et al. 2021

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“…Biochar is an organic material that is synthesized through pyrolysis and has been increasingly recognized by the scientists in the agricultural and animal husbandry fields in recent years. Scientific studies are growing in number on different structures of biochar used for various purposes such as agronomic benefits to soil and water remediation [1–5] . One of the major problems in the agricultural areas is infectious diseases that put the producer in material and moral damage.…”

Section: Introductionmentioning

confidence: 99%

Biochar as a Biocompatible Mild Anti‐Inflammatory Supplement for Animal Feed and Agricultural Fields

Yıldızlı

Coral

Ayaz

2021

Chemistry & Biodiversity

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Biochar is an organic material and high in carbon content, besides its use for energy purposes, it is also a material that serves the purpose of improving soil fertility, organic matter content of soils and removing heavy metals from water and soil. This study aims to investigate the antimicrobial effects of biochar whose beneficial effects on agricultural productivity has been proven by different studies. Scientific literature concerning the antibacterial, antifungal, and antiviral effects of the apricot seed and olive seed biochar is limited. Biochar applications may help to alter the microbial diversity by modifying biological environment either in agriculture or in animal husbandry. Moreover, biochar has been used in animal husbandry to improve animal health especially by regulating the intestinal flora and inflammation in the intestines. Hence, in our study, we investigated the effect of biochar on the growth of Aspergillus niger, Cryphonectria parasitica, Phytophthora cinnamomi, Plenodomus tracheiphilus, Enterococcus casseliflavus, Staphylococcus aureus, Pseudomonas aeruginosa, Escherichia coli and two different bacteriophage strains. Biochar did not have any direct effect on the growth of either Gram‐positive or Gram‐negative bacteria, bacteriophages, and fungi. In order to test their direct effects on the immune cells, mammalian macrophages were used and biochar directly reduced the inflammatory cytokine levels produced by the in vitro activated macrophages.

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“…The isoelectric point (IEP) of quartz is at pH 2.44, so quartz sand acquires a negative surface charge when pH > pH IEP (Jada, Ait, & Douch, 2006). Under prevailing conditions, except for deeply weathered soils with large contents of Fe and Al oxides, most of the soil components are negatively charged (Xu, Qafoku, Ranst, Li, & Jiang, 2016). In this study, a quartz sand-packed column was selected to mimic the porous features of bulk soil to characterize the surface electrochemical properties (Ilg, Dominik, Kaupenjohann, & Siemens, 2008;Sätmark, Albinsson, & Liang, 1996).…”

Section: Introductionmentioning

confidence: 99%

Characterizing surface electrochemical properties of simulated bulk soil in situ by streaming potential measurements

Liu

Wang

et al. 2019

European J Soil Science

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To evaluate the feasibility of using streaming potential to characterize the surface electrochemical properties of soil in situ, a quartz sand‐packed column was used to mimic the porous structure and architecture of bulk soil. A laboratory‐made apparatus was developed to measure in situ the streaming potential of quartz grains in the packed column under environmentally relevant physicochemical conditions (e.g. electrolyte pH, Fe oxide coating on sand grains, transport of goethite and amorphous Al hydroxide colloids, and the presence of humic acid). The results showed a significant positive relation between the measured streaming potentials and zeta potentials of the quartz grains examined. With decreasing electrolyte pH, the streaming potential of the quartz grains became less negative because of the greater protonation effect. Similarly, when Fe oxide was adsorbed on to the quartz surfaces, the streaming potential of Fe oxide‐coated quartz grains was less negative than that of uncoated quartz grains as a result of charge neutralization between positively charged Fe oxide and negatively charged sand grains. However, the streaming potential of Fe oxide‐coated quartz grains became more negative when humic acid was added to the electrolyte solution because of increased adsorption of negatively charged humic acid. Interestingly, an obvious change of streaming potential in the processes of colloidal goethite and amorphous Al hydroxide transport in the sand‐packed column grains occurred. Given that the overall positive charge of the colloidal amorphous Al was greater than that of goethite colloids, transport of amorphous Al colloids was found to exert a stronger effect on the variation in streaming potential of quartz sand. Taken altogether, the in situ streaming potential results showed that streaming potential can be used as a powerful index to characterize directly the surface electrochemical properties of quartz grains representing bulk soil. Highlights The variation in surface electrochemical properties of bulk soil needs investigation. We measured the streaming potential produced by simulated bulk soil using a laboratory‐made apparatus. The streaming potential of bulk soil varied with the change in environmentally relevant conditions. Streaming potential is a powerful index characterizing the surface electrochemical properties of bulk soil.

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Adsorption Properties of Subtropical and Tropical Variable Charge Soils: Implications from Climate Change and Biochar Amendment

Cited by 62 publications

References 184 publications

Impacts of long-term inorganic and organic fertilization on phosphorus adsorption and desorption characteristics in red paddies in southern China

Impacts of long-term inorganic and organic fertilization on phosphorus adsorption and desorption characteristics in red paddies in southern China

Biochar as a Biocompatible Mild Anti‐Inflammatory Supplement for Animal Feed and Agricultural Fields

Characterizing surface electrochemical properties of simulated bulk soil in situ by streaming potential measurements

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