PLANT AND CELL PHYSIOLOGY
·
2022
·Vol. 63
·期 9
·1273-1284
·
IF 4.937
Sun Nan,Huang Lin,Zhao Hongcheng,Zhang Nan,Lin Xianyong,Sun Chengliang
Although most cultivated soils have high levels of total phosphorus (P), the levels of bioavailable inorganic P (Pi) are insufficient. The application of plant-growth-promoting rhizobacteria (PGPR) is an eco-friendly strategy for P utilization; however, PGPR-mediated plant responses that enhance Pi acquisition remain unexplored. Here, we investigated the effect of Azospirillum brasilense on Arabidopsis adaptation to Pi deficiency. Results showed that A. brasilense inoculation alleviated Pi-deficiency-induced growth inhibition and anthocyanin accumulation and increased the total P content in Arabidopsis plants. A comprehensive analysis of root morphology revealed that A. brasilense increased root hair density and length under Pi-limited conditions. We further demonstrated that A. brasilense enhanced the acid phosphatase activity and upregulated the expression of several Pi transporter genes, such as PHOSPHATE1 (PHO1), PHOSPHATE TRANSPORTER 1:(PHT1:1) and PHT1;4. However, A. brasilense did not enhance the growth o total P content in pht1;1, pht1;4 and pht1;1pht1;4 mutants. Moreover, A. brasilense could not increase the P content and PHT1;1 expression in the root hairless mutant rsl4rsl2, because of the occurrence of low-Pi-induced PHT1;1 and PHT1;4 in root hairs. These results indicate that A. brasilense can promote root hair development and enhance acid phosphatase activity and Pi transporter expression levels, consequently improving the Pi absorption capacity and conferring plant tolerance to Pi deficiency.
研究领域:
植物学
·
分子生物学
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DOI
PubMed
高影响因子
SOIL USE AND MANAGEMENT
·
2021
·Vol. 38
·期 1
·576-583
·
IF 2.95
Xiaoyan Yang,Yuhua Kong,Erhui Guo,Xiangwei Chen,·Limei Li
Phosphorus (P) is used to enhance agricultural productivity. Organic acids increase the release of inorganic phosphorus (P i ) into soil solutions and thereby improve phosphorus utilization in soils; however, the effects of both organic acids and the soil organic matter contents on P i release are poorly understood. To assess the importance of these factors in determining phosphorus availability, the release of soil P i fractions (i.e. aluminium-bound phosphorus (Al-P), iron-bound phosphorus (Fe-P), occluded phosphorus (O-P) and calcium-bound phosphorus (Ca-P)) was evaluated on addition of organic acids (citric, oxalic and malic acids) to soils from Mollisols region that had different organic matter contents and received phosphorus fertilizer. Biochemically produced humic acid was used to modify soil organic matter contents. Among P i fractions, the Fe-P fraction had the highest concentration in all the soils with different organic matter contents. In the presence of organic acids, the release of P i fractions decreased as the soil organic matter increased. Among the fractions, Al-P had the highest release, followed by Fe-P. Comparison among various organic acids revealed that oxalic acid was the most effective for P i release. Path analysis showed that Al-P release had larger direct-path and indirect-path coefficients, which implied that Al-P release had the largest contribution to total P i (TP i ) release. We concluded that the effectiveness of organic acids in improving soil phosphorus availability was most pronounced in soils with low organic matter contents, but further field-scale research is needed to confirm this. Al-P was the most effective source of inorganic phosphorus in Mollisols.
研究领域:
土壤学
·
农业科学
·
环境科学
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DOI
高影响因子
Journal of Water Process Engineering
·
2025
·
IF 6.7
Shilong Wang,SuNa Wang,Weiyi Zhao,Shiyu Fang,E. Yang,Runze Xu,Fang Fang,Weijing Liu,Jiashun Cao,Song Cheng
Recovering phosphorus (P) from wastewater benefits both the environment and the field of clean energy. Vivianite is a key precursor for clean energy lithium batteries, making it a highly valuable and promising product in wastewater P recovery. As a widely used cathode material in lithium-ion batteries, LiFePO 4 is valued for its excellent thermal stability, safety, and long cycle life, making it a promising material for sustainable energy applications. However, the large amount of aluminium (Al) present in the recirculated sludge can be released into the supernatant during the anaerobic digestion process, which affects the recovery of vivianite and further impacts the performance of LiFePO 4 . This study investigated the effect of Al on vivianite crystallization throughout the P recovery process and explored the direct synthesis of LiFePO 4 using Al-containing vivianite. Varying initial Al concentrations were examined to understand their influence on the crystallization kinetics, purity, and morphology of vivianite. At low Al concentrations (1–50 mg/L), Al formed amorphous aluminium phosphate that attached to vivianite crystals via electrostatic interactions and surface adsorption. At high Al concentrations (100–300 mg/L), Al predominantly entered the solid phase through co-precipitation, significantly inhibiting vivianite formation. LiFePO 4 /C cathode materials were synthesized using the recovered Al-containing vivianite. The results revealed that Al existed as inert substances within LiFePO 4 /C, reducing its crystallinity and specific discharge capacity. These findings elucidate how Al affects vivianite crystallization during P recovery and provide theoretical insights for converting Al-containing vivianite into value-added LiFePO 4 .
研究领域:
环境科学
·
能源材料科学
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产品关联
DOI
高影响因子
MATERIALS LETTERS
·
2015
·
IF 2.489
Huan Zhou,Shiqin Kong,Sarit B. Bhaduri,Linhong Deng
Calcium phosphates with negative zeta potential belong to a type of materials favoring apatite nucleation, bone regeneration, as well as osseointegration. Unfortunately, there are limited options to produce such materials. The present work demonstrates a simple but versatile method to prepare calcium phosphates with negative zeta potential using sodium calcium polyphosphate as a precursor. The resulting products can be hydroxyapatite , calcium pyrophosphate or monetite, depending on the relevant experimental conditions. Both hydroxyapatite and calcium pyrophosphate were composed of nanoparticles . However, the as-prepared monetite was micro-plates with nanoporous surface structures. Such calcium phosphates may have great potential in bone tissue engineering applications.
研究领域:
生物材料学
·
骨组织工程
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DOI
高影响因子
CHEMOSPHERE
·
2021
·
IF 7.086
Yue Yin,Gaoyang Xu,Yuxing Xu,Mengyan Guo,Yihua Xiao,Tao Ma,Changqing Liu
The ubiquitous presence of inorganic and organic phosphorus in wastewater and natural water bodies has deteriorated the water environment qualities and exerted significant influences on ecosystems. In this study, an effective polypyrrole modified red mud adsorbent (PRM) was optimized for the adsorptive removal of inorganic and organic phosphorus from aqueous solutions. The addition of ferric chloride and pyrrole was optimized for complete oxidation and modification of polypyrrole onto red mud. Kinetic studies illustrated that the adsorption progress was accomplished by physical and chemical adsorption. The experimental data of the optimized PRM were described well by Langmuir isotherm, and the equilibrium adsorption capacity was 32.9 and 54.7 mg/g for inorganic and organic phosphorus, respectively. The PRM showed commendable adsorption performance despite the pH conditions ranging from 3 to 11. From the effect of ion strength and X-ray photoelectron spectroscopy (XPS) tests, we found that ligand exchange is the main mechanism of orthophosphate adsorption onto PRM, while electrostatic attraction played an important role in organic phosphorus adsorption. The adsorption performance from column studies showed that the velocity of flow influenced the breakthrough time of the column but the initial concentration had minor impacts. This study would extend the potential application of polypyrrole modified red mud, acting as an efficient adsorbent for inorganic and organic phosphorus adsorption in water treatment .
研究领域:
环境科学
·
水处理工程
✓ 已验证
DOI
高影响因子
SCIENCE OF THE TOTAL ENVIRONMENT
·
2024
·
IF 8.2
Zhaoyang Shen,Mengjie Zhou,Yanyang Zhang,Xudong Sun,Bo Kong,Wanyi Fu,Zhichao Yang,Chao Shan,Bingcai Pan
Excessive phosphorus (P) in eutrophic water induces cyanobacterial blooms that aggravate the burden of in-situ remediation measures. In order to ensure better ecological recovery, Flock & Lock technique has been developed to simultaneously sink cyanobacteria and immobilize P but requires a combination of flocculent and P inactivation agent. Here we synthesized a novel lanthanum-modified pyroaurite (LMP), as an alternative for Flock & Lock of cyanobacteria and phosphorus at the background of rich humic acid and suspended solids. LMP shows a P adsorption capacity of 36.0 mg/g and nearly 100 % removal of chlorophyll-a (Chl-a), turbidity , UV 254 and P at a dosage (0.3 g/L) much lower than the commercial analogue (0.5 g/L). The resultant sediment (98.2 % as immobile P) exhibits sound stability without observable release of P or re-growth of cyanobacteria over a 50-day incubation period. The use of LMP also constrains the release of toxic microcystins to 1.4 μg/L from the sunk cyanobacterial cells, outperforming the commonly used polyaluminum chloride (PAC). Similar Flock & Lock efficiency could also be achieved in real eutrophic water. The outstanding Flock & Lock performance of LMP is attributable to the designed La modification. During LMP treatment, La acts as not only a P binder by formation of LaPO 4 , but also a coagulant to create a synergistic effect with pyroaurite. The controlled hydrolysis of surface La(III) over pyroaurite aided the possible formation of La(III)-pyroaurite networking structure, which significantly enhanced the Flock & Lock process through adsorption, charge neutralization, sweep flocculation and entrapment. In the end, the preliminary economic analysis is performed. The results demonstrate that LMP is a versatile and cost-effective agent for in-situ remediation of eutrophic waters.
研究领域:
环境科学
·
水体修复
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产品关联
DOI
PubMed
高影响因子
JOURNAL OF ORGANIC CHEMISTRY
·
2024
·
IF 3.3
Liguang Gan,Changxu Ye,Tianshu Pi,Lingling Wang,Chunya Li,Long Liu,Tianzeng Huang,Tieqiao Chen,Li-Biao Han
An efficient method for the construction of C–P(V) and C–P(III) bonds via the iron-catalyzed phosphorylation of alcohols under ligand-free conditions is disclosed. This strategy represents a straightforward process to prepare a series of phosphine oxides and phosphine compounds in good to excellent yields from the readily available alcohols and P–H compounds. A plausible mechanism is also proposed. We anticipate that this mode of transforming simple alcohols would apply in chemical synthesis widely.
研究领域:
有机化学
·
合成化学
✓ 已验证
DOI
高影响因子
RSC Advances
·
2014
·Vol. 5
·期 11
·7832-7841
·
IF 3.708
Xiao-Shui Li,Xi Chen,Bi-Feng Yuan,Yu-Qi Feng
Metal oxide affinity chromatography has become one of the most widely used strategies for phosphopeptide enrichment prior to mass spectrometry analysis, but some defects still exist in this approach due to the complex physical and chemical properties of the metal oxide surface. Although the simultaneous phosphorylation of adjacent amino acids may greatly affect the bioactivity of the protein, there are few reports on the specific enrichment of multi-phosphopeptides. In this work, we report a highly selective enrichment method for capturing phosphopeptides or multi-phosphopeptides based on phosphonate-modified metal oxides. Compounds with different numbers of phosphate groups were adsorbed on the surface of ZrO2 and TiO2 to obtain phosphonate-modified metal oxides. Among them, phosphoric acid modified metal oxides (1P-ZrO2 and 1P-TiO2) could significantly enhance their selectivity towards phosphopeptides; and alendronate-modified metal oxides (2P-ZrO2 and 2P-TiO2) showed high selectivity for the enrichment of multi-phosphopeptides. In addition, the detection sensitivity was greatly improved by using these novel materials. The mechanism of the specific enrichment was considered to be ligand exchange and blocking of strong adsorption sites by the compounds containing the phosphate group. Finally, tryptic digests of proteins of human Jurkat-T cell lysate were further used to demonstrate the selectivity and specificity of ZrO2, 1P-ZrO2 and 2P-ZrO2.
研究领域:
生物化学
·
分析化学
·
蛋白质组学
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产品关联
DOI
高影响因子
JOURNAL OF APPLIED POLYMER SCIENCE
·
2020
·Vol. 137
·期 37
·49090
·
IF 2.52
Jianwen Cheng,Huajun Duan,Shuang Yang,Jun Wang,Qianqian Zhang,Guoping Ding,Yefa Hu,Siqi Huo
A P/N-containing flame retardant (PPT) constructed by phosphaphenanthrene, phosphonate, and triazole groups was successfully synthesized and used as a reactive co-curing agent for epoxy resin (EP). The curing behavior, thermal property, combustion behavior, and flame retardant mechanism of EP thermosets were comprehensively investigated. According to the analysis of DSC and TGA, PPT accelerated the crosslinking reaction and enhanced the charring ability for EP thermosets at high temperature. The results of combustion test indicated that PPT endowed epoxy thermoset with outstanding flame retardancy. When the phosphorus content was 0.71 wt%, EP/DDS/PPT-2 achieved a LOI value of 33.2% and passed V-0 rating in UL-94 test, and its peak heat release rate and total heat release were decreased by 63.7 and 30.5%, respectively, relative to EP/DDS. Moreover, the FIGRA of EP/DDS/PPT-2 was reduced from 9.7 to 3.5 kW m −2 s −1 , manifesting the significantly improved fire safety of EP thermoset. The flame retardant mechanism was summarized as two parts: (a) the barrier effect of continuous phosphorus-rich char layers in condensed phase, (b) the quenching effect of phosphorous radicals and diluting effect of nonflammable gases in gaseous phase.
研究领域:
材料科学
·
化学工程
✓ 已验证
产品关联
DOI
高影响因子
ENVIRONMENTAL RESEARCH
·
2023
·
IF 8.3
Fengguo Tian,Jianzhi Qiao,Wentian Zheng,Yang Lei,Shengtao Jiang,Yanbiao Liu
Phosphorus scarcity and the deleterious ecological impact of the release of organophosphorus pesticides have emerged as critical global issues. Previous research has shown the ability of electrochemistry to induce the precipitation of calcium phosphate from phosphorus-laden wastewater to recover the phosphorus. The current study presents a flow-through electrochemical system consisting of a column-shaped electrochemical reactor, a tubular stainless-steel (SS) cathode, and a titanium suboxides (TiSO) anode. This system simultaneously oxidizes tetrakis (hydroxymethyl) phosphonium sulfate (THPS) and recycles phosphates. The influence of current density, flow rate, and initial calcium ions concentration were examined under continuous flow operation. To enhance the electrochemical reactor's performance, we elevated the current density from 5 to 30 mA cm −2 , which caused the phosphorus recovery efficiency to increase from 37% to 72% within 120 min, accompanied by an enhancement of the THPS mineralization efficiency from 57% to 90%. These improvements were likely due to the higher yield of reactive species chloride species (Cl • ) formed at the TiSO anode and the higher local pH at the cathode. By investigating the formation of Cl • at the TiSO anode, we found that THPS mineralization exceeded 75% in the presence of NaCl at a current density of 20 mA cm −2 . The demonstrated performance of the flow-through electrochemical system should enable the utilization of anodic oxidation-cathodic precipitation for the recovery of phosphorus from organophosphorus-contaminated wastewater.
研究领域:
环境科学
·
化学工程
✓ 已验证
产品关联
DOI
PubMed
高影响因子
APPLIED BIOCHEMISTRY AND BIOTECHNOLOGY
·
2023
·
IF 3
Zhao Xia,Guo Meijing,Li Xian,Liu Bo,Li Binglin,Wang Jiao
Phospholipase D (PLD) with the higher transphosphatidylation activity was screened from Streptomyces sp. LD0501 basing on the protoplast mutagenesis technology. Then, it was successfully bio-imprinted to form a hyperactivated structure and rigidified by the intramolecular cross-linking, which was immobilized on the nonporous nanoscale silica. Characterization techniques were employed to investigate the structure and physicochemical properties of the catalysts, including Fourier transform infrared (FTIR) spectra and scanning electron microscopy (SEM) analysis. Transphosphatidylation activity and selectivity were improved significantly when immobilized PLD was used. The maximum yield for the production of phosphatidylserine (PS) reached 97% and the side reaction, the hydrolysis, was minimized. These results were further confirmed by the nuclear magnetic resonance (NMR) and mass spectrometry (MS) analysis. The imprint-induced characteristics of PLD was successfully “remembered” even in the present of much water. In addition, this immobilized hyperactivated PLD showed the excellent operational stabilities and environmental tolerances. Graphical abstract
研究领域:
生物化学
·
酶工程
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Journal of Environmental Chemical Engineering
·
2025
·
IF 7.2
Qinqin He,Wenhao Lu,Hang Zhou,Xiaonan Ji,Wei Hu,Kuo Pang,Zedong Teng,Xin Zhao,Lintao Wang,Keyu Fan,Feichao Hu,Min Li
Endogenous phosphorus (P) release is one of the key factors leading to eutrophication of water body. Phosphorus in sediments is difficult to be removed or recovered due to its chemical stability and complex morphology. Meanwhile, lanthanide metal organic framework (La-MOF) shows high efficiency in phosphate adsorption, but faces challenges in solid-liquid separation due to its powder form. In this study, the phosphorus solubilizing bacteria (PSB), Leclercia adecarboxylata L1–5, was used to transform some fractions of insoluble phosphorus in sediment into soluble phosphorus, and the La-MOF/Polypropylene (La-MOF/PP) fabric was innovatively prepared for phosphate adsorption. Solvothermal method was used for the preparation of La-MOF/PP fabric and the optimum synthesis time was 12 h. The best effect of phosphate removal was achieved when the La-MOF/PP fabric dosage was 1 g/L and the pH was 7. The regeneration efficiency of the material remained stable after five cycles of adsorption and desorption. Furthermore, the simulation results showed that PSB can release dissolved phosphate up to 5.40 mg P/L from sediment. After coupling with the La-MOF/PP fabric, the concentration of phosphate in the overlying water was significantly reduced to 0.38 mg P/L, which was much lower than that in the CK group (2.4 mg P/L). This study demonstrated that the coupled system of PSB and La-MOF/PP fabric could effectively reduce the sediment phosphate content, mitigate the negative impact of possible release of sediment phosphorus and degradation of the overlying water quality. It provided a promising technique for in-situ remediation of sediment phosphate.
研究领域:
环境科学
·
材料科学
·
生物技术
·
水污染控制
✓ 已验证
产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）