Modified biochar improves the storage capacity and adsorption affinity of organic phosphorus in soil

Zhao, Dixian; Qiu, Shangkai; Li, Mengmeng; Luo, Yuan; Zhang, Lisheng; Feng, Menghan; Yuan, Mingyao; Zhang, Keqiang; Wang, Feng

doi:10.1016/j.envres.2021.112455

Cited by 34 publications

(8 citation statements)

References 48 publications

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“…Phosphorus is an important nutrient for the growth of plants and animals; , however, the excessive discharge of phosphorus into water bodies causes eutrophication, leading to the proliferation of harmful algae and severe damage to the aquatic ecosystem. − Various phosphorus removal technologies have been developed, including chemical precipitation, electrolysis, adsorption, and biological processes. − Particularly, the adsorption method is considered to be a promising method for phosphorus removal owing to its low cost and efficiency. , …”

Section: Introductionmentioning

confidence: 99%

“…6−8 Particularly, the adsorption method is considered to be a promising method for phosphorus removal owing to its low cost and efficiency. 9,10 Recently, La-based adsorbents have attracted considerable attention because La is rich in reserves in the Earth's crust and has a high affinity for phosphate ions (Ksp = 3.7 × 10 −23 ). 11,12 La-modified bentonite (phosphorus-locking agent) developed by the Australian Federal Scientific and Industrial Research Organization has been applied in ∼200 natural water bodies worldwide.…”

Section: Introductionmentioning

confidence: 99%

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Green and Efficient Al-Doped LaFe_xAl_1–xO₃ Perovskite Oxide for Enhanced Phosphate Adsorption with Creation of Oxygen Vacancies

Feng

Guo

et al. 2023

ACS Appl. Mater. Interfaces

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La-based metal oxide materials are environmentally friendly and show promise for phosphate adsorption. A series of Al-doped perovskite oxides, such as LaFe x Al 1−x O 3 , were prepared using a facile citric acid-assisted sol−gel method. The characterization results demonstrated that with optimized Al doping, there was a significant increase in the specific surface area and increased defect content of perovskite oxide LaFe x Al 1−x O 3 . Adsorption experiments showed that the performance of phosphate removal by LaFe x Al 1−x O 3 was largely enhanced due to the improved adsorption capacity, which is maximum eight times higher compared with control perovskites prepared under neutral conditions. The mass transfer rate for adsorption was considerably boosted with phosphate removal within the initial 15 min. Spectroscopy analysis and density functional theory calculation results showed that the process of phosphate removal by the Al-doped perovskite oxides LaFe x Al 1−x O 3 involved electrostatic interactions, an inner-sphere complex, and surface oxygen vacancies, among which the creation of oxygen vacancies caused by the Al doping was the predominant mechanism for reducing the bonding barrier during adsorption and generating adsorption sites. The results enable the development of a green and efficient perovskite adsorbent with a La-based perovskite material for phosphorus removal.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Green and Efficient Al-Doped LaFe_xAl_1–xO₃ Perovskite Oxide for Enhanced Phosphate Adsorption with Creation of Oxygen Vacancies

Feng

Guo

et al. 2023

ACS Appl. Mater. Interfaces

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“…The maximum phosphate adsorption capacity of Ac-CG and Ne-CG was higher than that of the agricultural soils mentioned above but lower than that of some biochars. For example, the maximum phosphorus adsorption capacity of rice husk biochar is 2.91 mg g −1 , and the maximum phosphorus adsorption capacity of lanthanum modified biochar is 2.836 mg g −1 [67], while Al-CG had comparable phosphate adsorption capacity with the biochars, indicating that it can be used as a favorable soil conditioner. Moreover, Al-CG also had perfect desorption characteristics toward phosphate, when we used distilled water to desorb the Al-CG sample that had absorbed phosphate, the phosphate concentrations of filtrate were lower than that of other samples, while when it was desorbed with NaHCO 3 solution, the phosphate concentrations were higher than other samples.…”

Section: Enlightenment Of Modified Coal Gangue On Phosphate Retention...mentioning

confidence: 99%

Adsorption and Desorption of Coal Gangue toward Available Phosphorus through Calcium-Modification with Different pH

Min

Jiang

et al. 2022

Minerals

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The chemical reaction between calcium ions (Ca2+) and phosphate in the soil is the main way to maintain the availability of soil phosphorus. Thus, we believe stimulating coal gangue with Ca2+ solution would be an effective way to improve its adsorption and desorption capacity toward phosphate. In order to explore the effects of different pH of Ca2+ solution on the modified effect of coal gangue, we conducted mechanical grinding (<1 mm), high temperature calcination (800 °C), and the stimulation of Ca2+ solution with different pH (2, 7, 13), to prepare acidic calcium-modified coal gangue (Ac-CG) (Ac-CG, acidic calcium-modified coal gangue; Ne-CG, neutral calcium-modified coal gangue; Al-CG, alkali calcium-modified coal gangue; RCG, raw coal gangue), neutral calcium-modified coal gangue (Ne-CG), and alkali calcium-modified coal gangue (Al-CG); raw coal gangue (RCG) was regarded as the control. The results indicated that Al-CG had better phosphate adsorption (3.599 mg g−1); this favorable adsorption performance of Al-CG was related to the formation of hydrated calcium silicate gel and ettringite, which provided more Ca2+, Al3+, and hydroxyl groups, and a larger specific surface area (9.497 m2 g−1). Moreover, Al-CG not only held more phosphate but also maintained its availability longer for plants. It is suggested that stimulating coal gangue with Ca2+ solution under alkaline conditions is a perfect way to enhance its adsorption and desorption capacity toward phosphate; the Al-CG we prepared could be used as filling material and soil conditioner in the reclamation area.

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“…It has been shown that soil pH, metal elements aluminium and calcium can significantly affect phosphorus adsorption in soil ( Jing et al., 2024 ). The addition of Fe(II) biochar to saline soil enhanced its phosphate adsorption capacity ( Wu et al., 2020 ), and addition of biochar to black soil improved the storage capacity of organic phosphorus ( Zhao et al., 2022 ; Ilori et al., 2023 ). In contrast, the mode of adsorption of phosphorus by black soil is mainly monolayer chemisorption, which is related to electrostatic repulsion and oxygen-containing functional groups ( Xue et al., 2023 ).…”

Section: Introductionmentioning

confidence: 99%

Phosphorus adsorption characteristics and release risk in saline soils: a case study of Songnen Plain, China

Jiang,

Yan,

Liu

et al. 2023

Front. Plant Sci.

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IntroductionThe Songnen Plain is one of the three major saline-alkali areas in China, covering a vast area, where drought and overgrazing have exacerbated the salinization trend, and will have great potential for development if utilized rationally. Phosphorus, as one of important soil nutrients, plays a crucial role in plant growth. How to minimize its loss and migration has become a current research hotspot. The objective of the present study was to elucidate the adsorption properties of phosphorus in soils affected by salinization and to establish the correlation between the potential for phosphorus release and soil properties.MethodsA batch treatment test was conducted in this study using three soils with the various salinization degrees to examine the impact of environmental factors on the adsorption properties and potential release of phosphorus.Results and discussionIt was found that the maximum phosphorus adsorption by the three salinization soils in 0-360 minutes accounted for 86.8%-90.5% of the total adsorption capacity; the equilibrium adsorption capacity was: HS> MS> LS. In cases where the phosphorus level in the surrounding liquid is low, the three levels of salinized soils exhibited varying levels of phosphorus discharge, with the adsorbent acting as the origin of contaminants. The Pseudo-second-order model kinetics and Langmuir equation can well describe the adsorption process, and the adsorption process is spontaneous heat absorption with entropy increase. Increasing the pH led to an increase in the adsorption of phosphorus from the three salinized soils. Additionally, the adsorption was enhanced by introducing varying concentrations of Na+, Ca2+, and Al3+ to the background solution. The phosphorus eutrophication release risk (ERI) demonstrated a gradual decline as temperature increased. Correlation analysis revealed a noteworthy positive correlation between TN, TP, and ERI, as well as a significant negative correlation between CEC, K+, and ERI. Furthermore, there was a highly significant negative correlation between coarse silt and fine silt. Considering local climatic and environmental factors is crucial for controlling the adsorption capacity of phosphorus in various salinized soils, as it can unveil the mechanism of phosphorus adsorption and impact its migration and release risk.

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Modified biochar improves the storage capacity and adsorption affinity of organic phosphorus in soil

Cited by 34 publications

References 48 publications

Green and Efficient Al-Doped LaFe_xAl_1–xO₃ Perovskite Oxide for Enhanced Phosphate Adsorption with Creation of Oxygen Vacancies

Green and Efficient Al-Doped LaFe_xAl_1–xO₃ Perovskite Oxide for Enhanced Phosphate Adsorption with Creation of Oxygen Vacancies

Adsorption and Desorption of Coal Gangue toward Available Phosphorus through Calcium-Modification with Different pH

Phosphorus adsorption characteristics and release risk in saline soils: a case study of Songnen Plain, China

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Modified biochar improves the storage capacity and adsorption affinity of organic phosphorus in soil

Cited by 34 publications

References 48 publications

Green and Efficient Al-Doped LaFexAl1–xO3 Perovskite Oxide for Enhanced Phosphate Adsorption with Creation of Oxygen Vacancies

Green and Efficient Al-Doped LaFexAl1–xO3 Perovskite Oxide for Enhanced Phosphate Adsorption with Creation of Oxygen Vacancies

Adsorption and Desorption of Coal Gangue toward Available Phosphorus through Calcium-Modification with Different pH

Phosphorus adsorption characteristics and release risk in saline soils: a case study of Songnen Plain, China

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Green and Efficient Al-Doped LaFe_xAl_1–xO₃ Perovskite Oxide for Enhanced Phosphate Adsorption with Creation of Oxygen Vacancies

Green and Efficient Al-Doped LaFe_xAl_1–xO₃ Perovskite Oxide for Enhanced Phosphate Adsorption with Creation of Oxygen Vacancies