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Article
Green & Sustainable Science & Technology
Lucheng Li et al.
Summary: In this study, a Ca(OH)2 treated powdered activated carbon (Ca-PAC) assisted adsorption dynamic membrane system was proposed for simultaneous phosphorus adsorption and micrometer scale adsorbent recovery. The effect of Ca(OH)2 concentration on phosphorus removal rate was evaluated and the main phosphorus removal mechanism was determined to be ligand exchange between hydroxyl on Ca-PAC and phosphate. The integrated adsorption dynamic membrane system using Ca-PAC showed effective phosphorus adsorption and considerable micrometer scale adsorbent recovery.
JOURNAL OF CLEANER PRODUCTION
(2023)
Article
Environmental Sciences
Modupe Sarah Akindolie et al.
Summary: In this study, a simple and cost-effective method was developed for the removal of phosphorus from water using an absorbent named Fe12LaO19@BC, which was prepared by co-precipitation of iron and lanthanum on the matrix of biochar. The absorbent showed high efficiency in adsorbing phosphorus, even in the presence of other anions, and maintained good adsorption capacity across a wide pH range. The thermodynamic and XRD analysis indicated that Fe12LaO19 facilitated the adsorption of phosphorus, making it a promising adsorbent for phosphorus removal from water.
JOURNAL OF ENVIRONMENTAL MANAGEMENT
(2023)
Article
Environmental Sciences
Chunhui Yang et al.
Summary: In this study, the effect of wind-induced sediment resuspension on internal phosphorus in sediment treated by dredging and La-modified clay (LMC) based inactivation was investigated using a laboratory sediment resuspension simulation system (RSS). The results showed that dredged sediment had a better resistance to repeated wind disturbance compared to LMC-inactivated sediment. Both methods were effective in reducing phosphorus in different compartments of the lake, but their performances varied depending on the wind disturbance level. Inactivation was found to be a better method for controlling sediment internal phosphorus loading with repeated strong wind disturbances in eutrophic lakes.
SCIENCE OF THE TOTAL ENVIRONMENT
(2023)
Article
Environmental Sciences
Fengrui Zhang et al.
Summary: Aquatic environment factors, such as high pH and low DO, can affect phosphorus (P) flow and efficiency of P-passivators in eutrophic lakes. Therefore, the development of P passivators that work under a wide range of pH conditions with reduced side effects is crucial for lake remediation. This study prepared calcium (Ca)/aluminum (Al) and lanthanum (La)/Ca/Al composites (CA and LCA) for P immobilization in lake sediments. CA and LCA showed good P sorption performance at pH 4-11 and had the ability to correct water pH. Their addition significantly decreased P concentration in overlying water under various pH and DO conditions by converting reactive P to stable P. CA and LCA could be considered as new generation commercial P-passivators.
SCIENCE OF THE TOTAL ENVIRONMENT
(2023)
Article
Engineering, Environmental
Xiangtian Yang et al.
Summary: This study investigated the influence of aged nanoscale zero-valent iron (A-nZVI) amendment and capping on the mobilization of phosphorus from sediment to overlying water. The results showed that high A-nZVI dosage effectively reduced the release of dissolved reactive phosphorus (DRP) from sediment to overlying water under oxygen deficit conditions. Low A-nZVI dosage also had the ability to diminish the risk of DRP released from sediment into overlying water. A-nZVI capping further hindered DRP release and had higher controlling efficiency than A-nZVI amendment under oxygen deficit conditions.
CHEMICAL ENGINEERING JOURNAL
(2023)
Article
Environmental Sciences
Yihe Qu et al.
Summary: Attapulgite co-modified by lanthanum-iron (MT-LHMT) was used to study its effectiveness and mechanism in controlling phosphorus release from sediments. MT-LHMT has high adsorption capacity for phosphate and the maximum adsorption capacity of MT-LHMT to phosphate can reach 75.79 mg/g. The mechanism mainly involved electrostatic action, surface precipitation and ligand exchange between MT-LHMT bonded hydroxyl and phosphate to form La-O-P and Fe-O-P inner-sphere complexes. MT-LHMT has excellent adsorption performance in the pH range of 3-8. In addition to HCO3-, CO32- and HA(-) had a negative effect on the phosphorus removal of MT-LHMT, while NO3-, Cl-, SO42-, K+, Ca2+ and Mg2+ had a positive or no effect on phosphorus removal. MT-LHMT significantly reduced the risk of phosphorus release from overlying water in different dose effects and covering methods, as well as the unstable inactivation of flowing phosphorus, sediment dissolved reactive phosphorus (DRP) and available phosphorus with medium diffusion gradient in thin film in the sediment-water interface (Labile-P-DGT). The MT-LHMT capping wrapped with fabric can reduce the risk of nitrogen release from sediment to overlying water more than only MT-LHMT capping. The results of this study showed that the MT-LHMT capping wrapped with fabric has high potential and can be used as an active capping material to manage the nitrogen and phosphorus load in surface water.
Article
Environmental Sciences
Bin Wang et al.
Summary: In this study, a facile synthesis method was reported for efficient phosphate removal using La/Fe engineered bentonite (LFB). The bimetallic modified LFB composite exhibited high selectivity and efficient phosphate removal at pH 2-6, even in the presence of competing species. The adsorption behavior of phosphate on LFB was found to be chemisorption and could be fitted well with Sips isotherm equation.
Article
Environmental Sciences
Chenglong Xu et al.
Summary: The study found that attapulgite has good adsorption behavior for phosphorus and can improve the adsorption capacity of phosphorus in mariculture pond sediments, reducing the risk of phosphorus release.
Article
Geochemistry & Geophysics
Huihui Ma et al.
Summary: Phosphorus (P) is a key limiting nutrient in lake ecosystems and cyanobacterial blooms. This study investigated the sources and bioavailability of organic and inorganic phosphorus (P-i and P-o) in the sediments of Lake Sha, China. The findings showed that organic matter in the sediments primarily originated from aquatic plants, bacteria, algae, and terrestrial plants, with particulate matter from terrestrial plants being an important source of phosphorus. The dominant form of phosphorus in the sediments was calcium-bonded phosphorus (Ca-P), which had low bioavailability. The distribution of Phragmites australis in the lake could lead to the transformation of Ca-P to bioavailable phosphorus. Analysis of the chemical composition revealed that bioavailable phosphorus in the overlying water mainly came from rapidly degrading diester P and labile monoester P in the sediments. Particulate matter from the Yellow River was identified as an important source of bioavailable P-i and P-o in Lake Sha.
APPLIED GEOCHEMISTRY
(2022)
Article
Engineering, Environmental
Mengfan Han et al.
Summary: The combined use of HFO, calcite and zeolite as a geo-engineering tool was found to effectively suppress the liberation of phosphorus from sediment, demonstrating a promising sediment remediation strategy for managing internal loading of P in surface waterbodies.
CHEMICAL ENGINEERING JOURNAL
(2022)
Article
Engineering, Environmental
Danhong Wu et al.
Summary: LC outperforms LH in phosphate adsorption under neutral conditions, while LH performs better in alkaline environments. The adsorption ability of LC for phosphate is greatly influenced by other ions, while LH exhibits stronger stability in phosphate adsorption. LC has lower environmental risks in controlling phosphate release, while LH has a greater negative impact on sediment microbial diversity.
CHEMICAL ENGINEERING JOURNAL
(2022)
Article
Engineering, Environmental
Yi Yang et al.
Summary: Efficient phosphate removal from wastewater was achieved using the LC-ZSM-5 adsorbent, with an adsorption capacity of 91.2 mg-PO43-/g. Thermodynamic and kinetic studies revealed that phosphate adsorption on LC-ZSM-5 is a spontaneous exothermic process with chemical adsorption playing a crucial role. Regeneration study demonstrated the satisfactory regeneration ability of LC-ZSM-5 for potential industrial applications.
CHEMICAL ENGINEERING JOURNAL
(2022)
Article
Engineering, Environmental
Qianwei Feng et al.
Summary: This study focuses on the use of waste materials to prepare biochar and calcium alginate-biochar composite for simultaneous adsorption of phosphate and ammonium from water. The research analyzed the effects of different conditions on the adsorption performance, revealed the good co-adsorption performance of the composite material, investigated the main adsorption mechanisms, and found that the retention capacity for phosphate was better than that for ammonium. The study suggests that the composite material can be effectively used for the simultaneous recovery of phosphate and ammonium from water.
CHEMICAL ENGINEERING JOURNAL
(2022)
Article
Environmental Sciences
LingYan Liu et al.
Summary: The La(OH)3-modified canna biochar (CBC-La) exhibits excellent phosphate adsorption capacity, wide pH adaptability, and high selectivity. The main mechanisms of phosphate adsorption by CBC-La include electrostatic adsorption, ion exchange, and inner sphere complexation.
Article
Chemistry, Physical
Kai You et al.
Summary: The lanthanum-modified magnetic oyster shell (La-Fe-OSP) exhibited high phosphorus removal efficiency, successful recyclability, and excellent adsorption performance under various conditions, making it a promising new type of phosphorus adsorbent with broad application prospects.
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
(2022)
Article
Environmental Sciences
Zhongshuo Xu et al.
Summary: Phosphorus pollution can cause both aquatic eutrophication and global phosphorus scarcity. Fe-based layered double hydroxides (LDHs) have been extensively studied for their high phosphorus adsorption and recovery. The composition of Fe-based LDHs is crucial in determining their adsorption performance. In this study, Zn/Fe LDH exhibited a much higher adsorption capacity than Mg/Fe LDH, and calcination significantly increased the adsorption capacity of Mg/Fe LDH. The phosphorus removal efficiency of Fe-based LDHs was high under acidic conditions but decreased with increasing pH, with Zn/Fe LDH showing weaker pH inhibition.
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2022)
Article
Green & Sustainable Science & Technology
Shuai Liu et al.
Summary: Challenges remain in developing sustainable, cost-effective and environmentally friendly phosphate removal systems. However, the magnetic lanthanum/iron co-modified attapulgite (M-LaFeAP) showed excellent performance in phosphate removal with high efficiency, selectivity and recyclability.
JOURNAL OF CLEANER PRODUCTION
(2022)
Article
Environmental Sciences
Yue Zhi et al.
Summary: The removal of phosphorus (P) is crucial for protecting the environment. This study investigated the mechanism of P removal by La-containing materials and evaluated the effectiveness of a new material, La-2(CO3)(3(s)), in removing P from various aqueous systems, including municipal wastewater. The results showed that P removal occurred mainly through the precipitation of LaPO4(s). La-2(CO3)(3(s)) exhibited selective removal of P over other anions and had a relatively low solubility, making it a suitable material for P sequestration. Understanding the mechanism of P removal and finding effective materials are important for mitigating eutrophication.
SCIENCE OF THE TOTAL ENVIRONMENT
(2022)
Article
Environmental Sciences
Li Kang et al.
Summary: This study tested three commercially available phosphorus sorbents (LMB, AMZ, and Al) on their capacity to chemically inactivate soluble reactive phosphorus (SRP) under different temperatures and pH values. The results showed that temperature and pH had different effects on the SRP binding behavior of each sorbent, indicating the importance of considering these factors in lake restoration.
SCIENCE OF THE TOTAL ENVIRONMENT
(2022)
Article
Environmental Sciences
Sabolc Pap et al.
Summary: Shell-based adsorbents prepared from mussel and oyster shells through chemical calcination were effective in removing phosphate from water. The adsorbents contained calcite and lime on their surfaces and achieved high phosphate adsorption capacity through inner-sphere complexation and surface microprecipitation mechanisms. Desorption study revealed that the bonded phosphate could be readily available for plant uptake in soil.
SCIENCE OF THE TOTAL ENVIRONMENT
(2022)
Review
Environmental Sciences
Mahdieh Mozaffari Majd et al.
Summary: This paper gathers the most widely used adsorption isotherms and their definitions, along with examples of recent related work. A total of 37 adsorption isotherms collected from research published between 2010 and 2020 are presented, along with their parameters and applicable definitions. A table featuring the usage of these isotherms in peer-reviewed studies is also provided.
SCIENCE OF THE TOTAL ENVIRONMENT
(2022)
Article
Environmental Sciences
Jiajia Lei et al.
Summary: This research studied the influence of sediment burial depth on the performance of iron/aluminum co-modified calcite (FeAlCAL) in suppressing sedimentary phosphorus (P) release. The results showed that as the sediment burial depth increased, the efficiency of FeAlCAL to block sediment P release decreased. However, multiple capping and amendment with FeAlCAL can overcome the negative effect of sediment burial.
SCIENCE OF THE TOTAL ENVIRONMENT
(2022)
Article
Green & Sustainable Science & Technology
Guiyin Wang et al.
Summary: The study investigates the removal and recovery of phosphate from wastewater using chitosan-encapsulated bimetallic lanthanum and iron oxides composites. The results show that the composites have a high adsorption capacity and fast adsorption rate, and exhibit good stability towards co-existing substances in the environment. Therefore, the composites are promising candidates for efficient removal and recovery of phosphate from wastewater.
JOURNAL OF CLEANER PRODUCTION
(2022)
Article
Environmental Sciences
Zhanling Wang et al.
Summary: This study comprehensively investigated the migration and transformation of P during the formation of a new sediment-water interface (SWI) under different dissolved oxygen (DO) levels. The results suggest that high DO levels in the overlying water can promote the migration of P from the upper sediment layer to the bottom sediment layer, and the interactions between organic matter and Al, Fe, and Ca in the sediment play a crucial role in P migration.
Article
Environmental Sciences
Hongbin Yin et al.
Summary: This study developed a new type of P filter using different materials, with SAlLa@AB showing promising potential as a substrate for constructed wetlands due to its high P sorption capacity and solubility.
SCIENCE OF THE TOTAL ENVIRONMENT
(2022)
Article
Engineering, Environmental
Xiao Mi et al.
Summary: This study successfully removed phosphate by alkaline etching of raw palygorskite (PAL) activated by lanthanum engineering. The material maintained stable and satisfactory phosphate capturing within a wide pH range and the presence of co-existing substances. Interfering species were found to accelerate the adsorption process, while competition for active sites reduced the ultimate amount of captured phosphate. The study provided insights into the adsorption mechanism and demonstrated the feasibility of regeneration and reuse of the material. Overall, this research provides comprehensive understanding of the role of interfering substances in phosphate adsorption on functionalized materials.
CHEMICAL ENGINEERING JOURNAL
(2022)
Article
Environmental Sciences
Chengqi Tu et al.
Summary: This study investigated the release of phosphorus from sediments during cyanobacteria growth and found a correlation between microbial community structure and phosphorus release.
Article
Environmental Sciences
Yibo Lan et al.
Summary: In this study, nanoparticles functionalized porous biochar with high phosphate adsorption properties were synthesized. The material showed excellent adsorption performance, stability, and selectivity, enabling efficient recovery and reuse. Mechanistic studies revealed the importance of ligand exchange and electrostatic attraction in the adsorption process.
ENVIRONMENTAL RESEARCH
(2022)
Article
Engineering, Chemical
Lei Han et al.
Summary: A novel phosphate adsorbent with excellent adsorption performance and low cost has been synthesized in this study, which can adapt to various environments and has high practical value.
SEPARATION AND PURIFICATION TECHNOLOGY
(2022)
Article
Engineering, Environmental
Hongbin Yin et al.
Summary: This paper provides a detailed investigation of sediment internal P loading in Lake Taihu and its role in algal dominated zones (ADZs) and grass dominated zones (GDZs). The results show that ADZ sediments have higher levels of total P and mobile P fraction compared to GDZ sediments. The study also identifies ADZ as a hotspot for P, with high concentrations of DGT-measured P. Sediment microbial composition is found to be closely related to different P fractions in the sediment. The findings highlight the importance of considering the sediment composition and different management strategies for combating internal P loading in ADZ and GDZ.
Article
Engineering, Environmental
Chenglong Xu et al.
Summary: This paper provides a comprehensive overview of the adsorption efficiency, mechanism, and modified materials of attapulgite (AT) in removing phosphorus from fresh water. It also explores the potential of using AT as a filler in constructed wetlands (CWs) to enhance phosphorus removal from mariculture wastewater. Additionally, the sources and pathways of nutrients leading to eutrophication of coastal waters are summarized, along with the contribution of mariculture to coastal eutrophication and the application prospects and existing challenges of CWs in treating mariculture wastewater. The paper also identifies the initial problems and possible solutions when using AT as a filler in CWs for phosphorus removal from mariculture wastewater, and proposes future research directions.
JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING
(2022)
Article
Environmental Sciences
Enhui Sun et al.
Summary: A new formable porous granulated biochar loaded with La-Fe(hydr)oxides/montmorillonite (LaFe/MB) was successfully fabricated for enhanced phosphorus removal from wastewater. The developed biochar exhibited rapid phosphate adsorption kinetics and a high maximum adsorption capacity, making it a promising material for advanced phosphate removal.
Article
Chemistry, Analytical
Wessam Neweshy et al.
Summary: The study investigates the vertical distribution and geochemistry of phosphorus in lake sediments and evaluates the effectiveness of La modified bentonite in remediation of eutrophied lakes. The results show that La modified bentonite can decrease the content of soluble reactive phosphorus in sediments and reduce the dissolved flux of phosphorus across the sediment-water interface.
ENVIRONMENTAL SCIENCE-PROCESSES & IMPACTS
(2022)
Article
Environmental Sciences
Xue Geng et al.
Summary: The study investigated the response of internal phosphorus transformation to resuspended sediment under different disturbance intensities in a sediment-water system. The results showed that sediment resuspension can improve the redox environment in the sediment-water system, enhancing phosphorus retention capacity.
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2021)
Article
Environmental Sciences
Yanhui Zhan et al.
Summary: Lanthanum carbonate (LC) shows good performance in removing phosphate from water, mainly through ligand exchange reaction between carbonate and phosphate to form complexes. Adding LC to sediment can significantly prevent the release of phosphorus, leading to lower concentrations of reactive soluble phosphorus in the overlying water.
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2021)
Article
Engineering, Environmental
Shuai Ding et al.
Summary: The study found that the main forms of P binding in Lake Dianchi sediments are BD-P, NaOH-nrP, and NaOH-rP, with NaOH-rP contributing significantly to potential P release. As external P loading decreased, the internal P loading in Lake Dianchi decreased over the past 30 years, resulting in reduced absorption and transformation of potential mobile P in the lake ecosystem. This has implications for ecosystem sustainability and ecological restoration in Lake Dianchi.
Article
Environmental Sciences
Xiaodi Li et al.
Summary: The study found that algae have an impact on the performance of phosphorus-inactivating agents, but even in the presence of algae, lanthanum modified zeolite (LMZ) is still effective in reducing the concentration of dissolved inorganic phosphorus in water. The addition of LMZ can lower the risk of phosphorus release and improve the effectiveness of phosphorus-inactivating agents.
ENVIRONMENTAL POLLUTION
(2021)
Article
Engineering, Environmental
Biming Liu et al.
Summary: The study successfully prepared HLO-modified resin (LMR) for simultaneous removal of nitrogen and phosphorus from eutrophic water. LMR demonstrated effective adsorption of N and P multicomponent pollutants and maintained good separation and removal performance within a wide pH range.
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BIORESOURCE TECHNOLOGY
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JOURNAL OF HAZARDOUS MATERIALS
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TRENDS IN ECOLOGY & EVOLUTION
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