Investigation on the adsorption of phosphorus in all fractions from sediment by modified maifanite

Liu, Zisen; Zeng, Yi; Han, Fan; Yan, Pan; Liu, Biyun; Zhou, Qiaohong; Min, Fenli; He, Feng; Wu, Zhenbin

doi:10.1038/s41598-018-34144-w

Cited by 18 publications

(9 citation statements)

References 74 publications

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“…This may be due to the possible complexes of silver nanoparticles and phosphate. Moreover, at low pH surface hydroxyl groups of AgNPs-TAC were protonated in the ligand exchange process and -OH 2+ was to displace easily from the metal binding sites 44 . Thus, ligand exchange was also one of mechanisms of phosphate adsorption onto AgNPs-TAC.…”

Section: Discussion Of Agnps-tac Role In Phosphate Adsorptionmentioning

confidence: 99%

Phosphate Adsorption by Silver Nanoparticles-Loaded Activated Carbon derived from Tea Residue

Trinh

Nguyen

Van

et al. 2020

Sci Rep

138

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Vu 6 , t. t. pham 7 , thi nu nguyen 8 , n. V. Quang 9 & X. c. nguyen 10,11* this study presents the removal of phosphate from aqueous solution using a new silver nanoparticlesloaded tea activated carbon (Agnps-tAc) material. in order to reduce costs, the tea activated carbon was produced from tea residue. Batch adsorption experiments were conducted to evaluate the effects of impregnation ratio of Agnps and tAc, pH solution, contact time, initial phosphate concentration and dose of Agnps-Ac on removing phosphate from aqueous solution. Results show that the best conditions for phosphate adsorption occurred at the impregnation ratio AgNPs/TAC of 3% w/w, pH 3, and contact time lasting 150 min. The maximum adsorption capacity of phosphate on AgNPs-TAC determined by the Langmuir model was 13.62 mg/g at an initial phosphate concentration of 30 mg/L. The adsorption isotherm of phosphate on AgNPs-TAC fits well with both the Langmuir and Sips models. The adsorption kinetics data were also described well by the pseudo-first-order and pseudo-secondorder models with high correlation coefficients of 0.978 and 0.966, respectively. The adsorption process was controlled by chemisorption through complexes and ligand exchange mechanisms. this study suggests that Agnps-tAc is a promising, low cost adsorbent for phosphate removal from aqueous solution.

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Section: Discussion Of Agnps-tac Role In Phosphate Adsorptionmentioning

confidence: 99%

Phosphate Adsorption by Silver Nanoparticles-Loaded Activated Carbon derived from Tea Residue

Trinh

Nguyen

Van

et al. 2020

Sci Rep

138

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“…In the same way, it has been reported that below 4.5 of pH values the mineral dissolution is favored, promoting the precipitation reactions between H 2 PO 4 − and cations in solution (Al 3+ and Fe 3+ ) [77], and to form H 2 PO 4 − -cation-organic matter complexes [53]. The increase of the H 2 PO 4 − adsorption at a low pH has been demonstrated on pillared bentonites [75], AgNPs-tea activated carbon [76], sediments [78] and in Andisol soils [24]. Future research should be addressed to corroborate whether, in the presence of both ENPs, one of these mechanisms was prevalent for H 2 PO 4 − adsorption on T-OM and R-OM soil samples, or whether several mechanisms acted together.…”

Section: Ad-and Desorption Of Phosphate On Soilsmentioning

confidence: 99%

Describing Phosphorus Sorption Processes on Volcanic Soil in the Presence of Copper or Silver Engineered Nanoparticles

et al. 2021

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Engineered nanoparticles (ENPs) present in consumer products are being released into the agricultural systems. There is little information about the direct effect of ENPs on phosphorus (P) availability, which is an essential nutrient for crop growthnaturally occurring in agricultural soils. The present study examined the effect of 1, 3, and 5% doses of Cu0 or Ag0 ENPs stabilized with L-ascorbic acid (suspension pH 2–3) on P ad- and desorption in an agricultural Andisol with total organic matter (T-OM) and with partial removal of organic matter (R-OM) by performing batch experiments. Our results showed that the adsorption kinetics data of H2PO4− on T-OM and R-OM soil samples with and without ENPs were adequately described by the pseudo-second-order (PSO) and Elovich models. The adsorption isotherm data of H2PO4− from T-OM and R-OM soil samples following ENPs addition were better fitted by the Langmuir model than the Freundlich model. When the Cu0 or Ag0 ENPs doses were increased, the pH value decreased and H2PO4− adsorption increased on T-OM and R-OM. The H2PO4− desorption (%) was lower with Cu0 ENPs than Ag0 ENPs. Overall, the incorporation of ENPs into Andisols generated an increase in P retention, which may affect agricultural crop production.

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“…The simulation model for chemical transport and transformation between soil or sediment and runoff is an essential method for studying pollution prediction and migration (Koopmans et al, 2019; Yang et al, 2016; Zhang et al, 2020). The PP transport is a dynamic equilibrium process in the runoff‐sediment system and is controlled by the P adsorption–desorption on sediment particles (Huang et al, 2016; Liu et al, 2018). Sediment adsorbs most of the P in the water, and the raindrop‐driven process will affect the transport of chemicals and the concentration variation (Walter et al, 2007).…”

Section: Introductionmentioning

confidence: 99%

Modelling rainfall‐induced phosphorus loss with eroded clay and surface runoff

Chen

Wang

et al. 2023

Hydrological Processes

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Phosphorus (P) loss via runoff will reduce soil fertility and cause water eutrophication. Although P is lost as both particulate phosphorus (PP) and soluble phosphorus (SP), the existing P transport models for landscapes rarely consider PP and its exchange with surface runoff. We developed an integrated P transport model which coupled both SP and PP transport mechanisms based on the Rose–Gao model and assessed it via laboratory experiments. We also introduced a temporal varying P partition coefficient Kd into the model to reveal the impacts of rapid changes in the water environment on P adsorption and desorption. Experiments using kaolinite mixed soil and montmorillonite mixed soil were conducted under artificial rainfall events. The results show that the P transport model simulates the concentrations of eroded sediment, SP, and PP in surface runoff, with good agreement with the measured values (all R2 > 0.88). Kaolinite mixed soil had larger sediment and SP concentrations in the runoff than montmorillonite mixed soil. In addition, compared with the no Kd model (Gao model) and the constant Kd model, our model provided simulation results that most closely matched the experimental data. Considering the influence of eroded sediment and the P dynamic partitioning between sediment and water to the surface, the P transport model can provide an effective tool for P dynamics with water and sediment in surface runoff.

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Investigation on the adsorption of phosphorus in all fractions from sediment by modified maifanite

Cited by 18 publications

References 74 publications

Phosphate Adsorption by Silver Nanoparticles-Loaded Activated Carbon derived from Tea Residue

Phosphate Adsorption by Silver Nanoparticles-Loaded Activated Carbon derived from Tea Residue

Describing Phosphorus Sorption Processes on Volcanic Soil in the Presence of Copper or Silver Engineered Nanoparticles

Modelling rainfall‐induced phosphorus loss with eroded clay and surface runoff

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