Adsorptive removal of Cu2+ from aqueous solution using aerobic granular sludge

Jian, Meipeng; Tang, Chaochun; Liu, Ming

doi:10.1080/19443994.2014.895782

Cited by 11 publications

(2 citation statements)

References 34 publications

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“…This problem can be mitigated by increasing the crosslink density of hydrogel, which greatly impedes diffusion of the copper ions. This is because diffusion of copper ions in the hydrogel is largely controlled by the polymer networks through van der Waals 39 and electrostatic interactions 40 . We found increasing the concentration of monomers (3.0 M) during hydrogel preparation adequately prevented copper growth in the gel.…”

Section: Resultsmentioning

confidence: 99%

Hydrogel microphones for stealthy underwater listening

et al. 2016

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Exploring the abundant resources in the ocean requires underwater acoustic detectors with a high-sensitivity reception of low-frequency sound from greater distances and zero reflections. Here we address both challenges by integrating an easily deformable network of metal nanoparticles in a hydrogel matrix for use as a cavity-free microphone. Since metal nanoparticles can be densely implanted as inclusions, and can even be arranged in coherent arrays, this microphone can detect static loads and air breezes from different angles, as well as underwater acoustic signals from 20 Hz to 3 kHz at amplitudes as low as 4 Pa. Unlike dielectric capacitors or cavity-based microphones that respond to stimuli by deforming the device in thickness directions, this hydrogel device responds with a transient modulation of electric double layers, resulting in an extraordinary sensitivity (217 nF kPa−1 or 24 μC N−1 at a bias of 1.0 V) without using any signal amplification tools.

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Section: Resultsmentioning

confidence: 99%

Hydrogel microphones for stealthy underwater listening

et al. 2016

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“…It could also be seen that the adsorption capacity increased with the increase of initial concentration of MO and temperature, showing that the increase of initial concentration of MO and the increase of temperature were favorable to adsorption. The type of adsorption could be further determined according to the formula of separation factor R L = 1/(1+k L c 0 ) [29]. The process belonged to linear adsorption when R L was 1, while the adsorption was irreversible when R L was 0.…”

Section: Isothermal Adsorption and Thermodynamic Analysismentioning

confidence: 99%

Adsorption Properties of Methyl Orange in Water by Sheep Manure Biochar

Lü¹,

Chen²,

Bai³

et al. 2019

Pol. J. Environ. Stud.

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Sheep manure was used to prepare biochar under pyrolysis temperature of 600ºC. The structural features of biochar were characterized by elemental analysis, BET analysis and scanning electron microscopy. The effects of pH, biochar dosage, adsorption time, temperature on adsorption of methyl orange (MO) in water by sheep manure biochar, as well as its adsorption mechanism, were investigated via batch experiments. The results showed that the sheep manure biochar had large specific surface area, abundant hole structure and high aromaticity and polarity. When temperature was 25ºC, MO concentration was 20 mg/L, initial pH was 4.0, and biochar dosage was 0.6 g/L, the adsorption achieved balance at about 250min, and the MO removal rate reached to 92.55%. Pseudo second-order kinetic model and Langmuir model could more accurately describe the adsorption behavior of MO onto sheep manure biochar, and the theoretical maximum adsorption capacity was 42.513 to 45.563 mg/g. Besides, the process is a favorable adsorption. Thermodynamic studies showed that the adsorption was a spontaneous, endothermic and entropy-increasing process. Sheep manure biochar could be used as a good adsorption material for MO in water, which achieved the goal of controlling waste by waste.

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