Copper Adsorption to Microplastics and Natural Particles in Seawater: A Comparison of Kinetics, Isotherms, and Bioavailability

2021 ◽  
Author(s):  
Ciara Chun Chen ◽  
Xiaoshan Zhu ◽  
Huo Xu ◽  
Fengyuan Chen ◽  
Jie Ma ◽  
...  
Keyword(s):  
Copper Adsorption

scholarly journals Novel PVDF-PVP Hollow Fiber Membrane Augmented with TiO2 Nanoparticles: Preparation, Characterization and Application for Copper Removal from Leachate

Nanomaterials ◽  
2021 ◽  
Vol 11 (2) ◽  
pp. 399
Author(s):  
Mohammed Umar Abba ◽  
Hasfalina Che Man ◽  
Raba’ah Syahidah Azis ◽  
Aida Isma Idris ◽  
Muhammad Hazwan Hamzah ◽  
...  
Keyword(s):  
Contact Angle ◽  
Adsorption Capacity ◽  
Tio2 Nanoparticles ◽  
Polyvinylidene Fluoride ◽  
Negative Impact ◽  
Hollow Fiber Membrane ◽  
Copper Removal ◽  
Fiber Membrane ◽  
Copper Adsorption ◽  
Phase Inversion Technique

High proportion of copper has become a global challenge owing to its negative impact on the environment and public health complications. The present study focuses on the fabrication of a polyvinylidene fluoride (PVDF)-polyvinyl pyrrolidone (PVP) fiber membrane incorporated with varying loading (0, 0.5, 1.0, 1.5, and 2.0 wt%) of titanium dioxide (TiO2) nanoparticles via phase inversion technique to achieve hydrophilicity along with high selectivity for copper removal. The developed fibers were characterized based on scanning electron microscopy (SEM), energy dispersive X-ray spectroscopy (EDX), permeability, porosity, zeta potential, and contact angle. The improved membrane (with 1.0 wt% TiO2) concentration recorded the maximum flux (223 L/m2·h) and copper rejection (98.18%). Similarly, 1.0 wt% concentration of TiO2 nanoparticles made the membrane matrix more hydrophilic with the least contact angle of 50.01°. The maximum copper adsorption capacity of 69.68 mg/g was attained at 1.0 wt% TiO2 concentration. The experimental data of adsorption capacity were best fitted to the Freundlich isotherm model with R2 value of 0.99573. The hybrid membrane developed in this study has considerably eliminated copper from leachate and the concentration of copper in the permeate was substantially reduced to 0.044 mg/L, which is below standard discharge threshold.

scholarly journals Fly Ash Coated with Magnetic Materials: Improved Adsorbent for Cu (II) Removal from Wastewater

Materials ◽  
2020 ◽  
Vol 14 (1) ◽  
pp. 63
Author(s):  
Maria Harja ◽  
Gabriela Buema ◽  
Nicoleta Lupu ◽  
Horia Chiriac ◽  
Dumitru Daniel Herea ◽  
...  
Keyword(s):  
Fly Ash ◽  
Adsorption Capacity ◽  
Copper Ions ◽  
Synthetic Wastewater ◽  
Bet Surface Area ◽  
Isotherm Models ◽  
Batch Adsorption ◽  
Maximum Adsorption Capacity ◽  
Copper Adsorption ◽  
X Ray

Fly ash/magnetite material was used for the adsorption of copper ions from synthetic wastewater. The obtained material was characterized by scanning electron microscopy (SEM), energy dispersive X-ray analysis (EDAX), X-ray diffractometer (XRD), Fourier transform infrared spectroscopy (FTIR), Brunauer–Emmett–Teller (BET) surface area, and vibrating sample magnetometer (VSM). Batch adsorption experiments were employed in order to investigate the effects of adsorbent dose, initial Cu (II) concentration and contact time over adsorption efficiency. The experimental isotherms were modeled using Langmuir (four types of its linearization), Freundlich, Temkin, and Harkins–Jura isotherm models. The fits of the results are estimated according to the Langmuir isotherm, with a maximum adsorption capacity of 17.39 mg/g. The pseudo-second-order model was able to describe kinetic results. The data obtained throughout the study prove that this novel material represents a potential low-cost adsorbent for copper adsorption with improved adsorption capacity and magnetic separation capability compared with raw fly ash.

Copper removal by polymer immobilised Rhizopus oryzae

2000 ◽  
Vol 42 (7-8) ◽  
pp. 345-352 ◽  
Author(s):  
M. S. Al-Hakawati ◽  
C. J. Banks
Keyword(s):  
Adsorption Capacity ◽  
Room Temperature ◽  
Shake Flask ◽  
Rhizopus Oryzae ◽  
Polymer Matrices ◽  
Copper Uptake ◽  
Uptake Capacity ◽  
Copper Adsorption ◽  
Copper Solution ◽  
Erroneous Result

Rhizopus oryzae, strain IMI 057412, was immobilised by inclusion in six different polymers: polyvinlformal, polysulfone, polyurethane, alginate, polyacrylamide, k-carrageenan, polyethyleneimine(PEI). It was also grown on a seventh, polyurethane. The biomass/polymer matrices were formed into equal size units (4 mm spheres or cubes) and the resulting biomass/polymer matrices were used to uptake copper at 2 mg/l from a laboratory-formulated copper solution in shake flask experiments at room temperature and initially neutral pH. Results showed that the copper uptake capacity of immobilised biomass was either equal to or less than that of free biomass. Biomass immobilised in polyurethane gave a capacity equal to that of free biomass, while other matrices hindered the uptake to different degrees. The k-carrageenan matrix proved to be unstable in the copper solution and dissolved during the experiment releasing the biomass and leading to an erroneous result. The polymer matrices without biomass, with theexception of alginate and polysulfone, showed no measurable copper adsorption capacity. All the experiments were conducted in duplicate with a maximum variation between them of 7%.

scholarly journals Adsorption of Copper in Soil and its Dependence on Physical and Chemical Properties

2018 ◽  
Vol 66 (1) ◽  
pp. 219-224 ◽  
Author(s):  
Vítězslav Vlček ◽  
Miroslav Pohanka
Keyword(s):  
Soil Properties ◽  
Solid Phase ◽  
Chemical Properties ◽  
Total Content ◽  
Exchange Capacity ◽  
Soil Reaction ◽  
Available Phosphorus ◽  
Copper Adsorption ◽  
Phosphorus And Potassium ◽  
Physical And Chemical

Soil samples (n = 11) were collected in the chernozem areas of the Czech Republic (the Central Europe) from the topsoil and used as representative samples. All sampling areas have been used for agricultural purposes (arable soil) and they were selected as typical representatives of agricultural soil. These samples represented the soil with same genesis (to reduction differencies between soil types) but with different soil properties (physical and chemical). Complete chemical and physical analyses were made for confirmation of copper adsorption on solid phase: we analysed the particle size distribution, content of oxidizable carbon (Cox), the cation exchange capacity (CEC), supply of exchange calcium, magnesium, sodium, phosphorus and potassium, soil reaction and the total supply of Fe, Al, Mn, Ca, Mg, K, P and N. The strongest simple correlation between analysed soil properties and copper concentration had content of available magnesium (r = 0.44) and available phosphorus (r = −0.51). In the case of multiple correlations (i. e. collective influence of multiple soil properties) had the strongest influence combination of clay, soil reaction, total content of phosphorus, available magnesium and available phosphorus. The main influence of phosphorus and magnesium is evident. We suppose that copper and phosphorus enter into specific complex. Influence of these five soil properties can explain 92.7 % (r = 0.927) changes in the content of copper changes in the experiment.

Decomposition of the surface carbide on Ni(001) induced by copper adsorption and surface segregation of carbon

1991 ◽  
Vol 257 (1-3) ◽  
pp. L623-L627 ◽  
Author(s):  
H. Tochihara ◽  
A. Pomprasit ◽  
T. Kadowaki ◽  
S. Mizuno ◽  
H. Minagawa ◽  
...  
Keyword(s):  
Surface Segregation ◽  
Copper Adsorption ◽  
Surface Carbide

Effect of tea polyphenols on copper adsorption and manganese release in two variable-charge soils

2018 ◽  
Vol 190 ◽  
pp. 374-380 ◽  
Author(s):  
Ru-hai Wang ◽  
Xiao-fang Zhu ◽  
Wei Qian ◽  
Hao-ye Tang ◽  
Jun Jiang ◽  
...  
Keyword(s):  
Tea Polyphenols ◽  
Copper Adsorption ◽  
Variable Charge ◽  
Manganese Release ◽  
Variable Charge Soils

scholarly journals Kinetics and thermodynamics of aqueous copper adsorption by Ca-Al-Zn LDH and its calcined product

2020 ◽  
Vol 0 (0) ◽  
pp. 0-0
Author(s):  
Al-Sayed Bakr ◽  
Reda Abdel Gayed ◽  
Radwan El-Zoheiry ◽  
Ahmed Abdel Wahab Salem
Keyword(s):  
Copper Adsorption ◽  
Kinetics And Thermodynamics

Effect of Copper Adsorption on Some Charge Characteristics of Nano-Ball Allophane

2006 ◽  
Vol 1 (3) ◽  
pp. 243-250 ◽  
Author(s):  
Adel Ghoneim ◽  
Naoto Matsue ◽  
Teruo Henmi
Keyword(s):  
Copper Adsorption ◽  
Effect Of Copper

scholarly journals Synthesis of acid treated carbonized mandarin peel for purification of copper

2020 ◽  
Vol 15 (2) ◽  
pp. 460-471
Author(s):  
T. Unugul ◽  
F. U. Nigiz
Keyword(s):  
Contact Time ◽  
Freundlich Isotherm ◽  
Kinetic Studies ◽  
Adsorption Kinetic ◽  
Adsorption Behaviour ◽  
Solution Ph ◽  
Copper Adsorption ◽  
Adsorbent Dosage ◽  
Mandarin Peel ◽  
Pseudo Second Order

Abstract In this study; acid treated carbonized mandarin peel (CMP) adsorbent was prepared and the adsorption behaviour of the adsorbent for copper removal was investigated. In the adsorption studies the effects of initial metal concentration, solution pH, adsorbent dosage and contact time on the removal were investigated. As a result; the highest removal of 100% was achieved when the copper concentration in water was 5 mg/L and the adsorbent dosage was 3.75 g/L at a solution pH of 7. Isotherm studies were also done and the appropriate isotherm was obtained as the Freundlich isotherm. According to the kinetic studies, the copper adsorption onto CMP adsorbent was adopted to the pseudo-second-order adsorption kinetic. After HCl regeneration, the adsorbent maintained 94% of its activity.

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