Adsorption performance of modified bentonite granular (MBG) on sediment phosphorus in all fractions in the West Lake, Hangzhou, China

Liu, Zisen; Zeng, Yi; Liu, Biyun; Zeng, Lingzao; Xu, Dong; He, Feng; Kong, Lingwei; Zhou, Qiaohong; Wu, Zhenbin

doi:10.1016/j.ecoleng.2017.05.042

Cited by 34 publications

(13 citation statements)

References 35 publications

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“…Therefore, the complexes and ligand exchange were the main mechanisms of the phosphate adsorption onto AgNPs-TAC. This agreed with the previous report that anionic coordination exchange adsorption was the main mechanism of phosphate adsorption onto modified bentonite granular (MBG) 45 . www.nature.com/scientificreports www.nature.com/scientificreports/ To assess phosphate adsorption, the results documented in this study were compared with other adsorbents.…”

Section: Discussion Of Agnps-tac Role In Phosphate Adsorptionsupporting

confidence: 93%

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 Adsorptionsupporting

confidence: 93%

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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“…5b ). Compared to the RMF, CMMF-H2.5-400 showed more considerable micropore adsorption and higher ion exchange capacity due to the more microporous microstructure and superior charge number 31 . Figure 5a indicated that the adsorption quantity of P from the sediment increased with an increase of RMF dosages.…”

Section: Resultsmentioning

confidence: 97%

“…Many in-situ techniques have been applied to reduce internal P loading in sediment, including in-situ capping 24 , 25 , hypolimnetic aeration 26 , 27 , phytoremediation 28 , 29 , and in-situ physicochemical adsorption 30 , 31 , etc. Among these, in-situ physicochemical adsorption turns out to be an efficient technique for controlling eutrophication in lakes.…”

Section: Introductionmentioning

confidence: 99%

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

Liu

Zeng

Han

et al. 2018

Sci Rep

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Sediment phosphorus (P) removal is crucial for the control of eutrophication, and the in-situ adsorption is an essential technique. In this study, modified maifanite (MMF) prepared by acidification, alkalization, salinization, calcination and combined modifications, respectively, were first applied to treat sediment P. The morphology and microstructure of MMF samples were characterized by X-ray fluorescence (XRF), Fourier transform infrared (FTIR), X-ray diffraction (XRD), scanning electron microscope (SEM) and Brunauer-Emmett-Teller (BET). Various adsorption parameters were tested, such as dosage of maifanite, time, operation pH and temperature. The adsorption mechanisms were also investigated and discussed. Results showed that CMMF-H2.5-400 (2.5 mol/L H2SO4 and calcined at 400 °C) exhibited the highest P adsorption capacity. Thus, it was selected as the in-situ adsorbent material to control the internal P loading. Under the optimal conditions of dynamic experiments, the adsorption rates of TP, IP, OP, Fe/Al-P and Ca-P by CMMF-H2.5-400 were 37.22%, 44.41%, 25.54%, 26.09% and 60.34%, respectively. The adsorption mechanisms analysis revealed that the adsorption of P onto CMMF-H2.5-400 mainly by ligand exchange. Results of this work indicated that the modification treatment could improve the adsorption capacity of maifanite, and CMMF-H2.5-400 could be further applied to eutrophication treatment.

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“…Characteristic functional groups of substrate materials can be distinguished by FTIR [31]. The broad peak at 3130-3450 cm −1 and 1620-1640 cm − Table 3.…”

Section: Ftirmentioning

confidence: 99%

Adsorption Performance on Sediment Nutrients by Different Proportions of Zeolite and Shale Ceramsite (ZSC)

Sun¹,

Yang²,

Zeng³

et al. 2020

Pol. J. Environ. Stud.

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Adsorption performance of modified bentonite granular (MBG) on sediment phosphorus in all fractions in the West Lake, Hangzhou, China

Cited by 34 publications

References 35 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

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

Adsorption Performance on Sediment Nutrients by Different Proportions of Zeolite and Shale Ceramsite (ZSC)

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