Removal of free cyanide from aqueous solutions by pine cone scale (PCS)

2019 ◽  
Vol 153 ◽  
pp. 121-129
Author(s):  
Ali Behnamfard ◽  
Rasool Alaei ◽  
Kamran Chegni ◽  
Francesco Veglio
Keyword(s):  
Aqueous Solutions ◽  
Free Cyanide ◽  
Pine Cone ◽  
Cone Scale

scholarly journals Kinetic, isotherm and thermodynamic studies with linear and non-linear fitting for cadmium(II) removal by black carbon of pine cone

2017 ◽  
Vol 76 (8) ◽  
pp. 2242-2253 ◽  
Author(s):  
Z. Yavari ◽  
M. Noroozifar
Keyword(s):  
Aqueous Solutions ◽  
Black Carbon ◽  
Adsorption Process ◽  
Order Kinetic ◽  
Cadmium Removal ◽  
Thermodynamic Studies ◽  
Linear Fitting ◽  
Pine Cone ◽  
Fitting Method ◽  
Non Linear

In this study, black carbon from pine cone (BCPC) and acidic-modified BCPC (MBCPC) powder as a popular agricultural waste in the southeast of Iran were used for cadmium removal from aqueous solutions. The effect of various factors, such as surface chemistry and dosage of adsorbent, contact time, size of particles, initial concentration of cadmium, temperature, and pH of aqueous solutions, was investigated. The results show cadmium removal with usage of the mentioned adsorbents increased after acidic modification. It was noteworthy in this work that the removal percentage of pollutant was above 90% for suggested biosorbents. The obtained experimental data for optimum conditions were selected to model the adsorption behavior of the materials with usage of six isotherm equations via non-linear fitting method and the residual root mean square error estimation for each model. The adsorption of cadmium preferably fitted Khan and Langmuir–Freundlich isotherms for BCPC and MBCPC adsorbents, respectively. The kinetic studies via linear fitting method proved the second-order kinetic was the applicable model for the adsorption process. Thermodynamic studies show the adsorption process of cadmium onto BCPC and MBCPC was spontaneous and endothermic.

scholarly journals How the pine seeds attach to/detach from the pine cone scale?

2017 ◽  
Vol 10 (1) ◽  
pp. 38-47 ◽  
Author(s):  
Kahye Song ◽  
Shyr-Shea Chang ◽  
Sang Joon Lee
Keyword(s):  
Pine Cone ◽  
Cone Scale

Removal of lead ions from aqueous solutions using functionalized pine cone powder

2021 ◽  
Author(s):  
Ghadamali Bagherian ◽  
Elham Nemati ◽  
Mansour Arab Chamjangali ◽  
Motahare Ashrafi
Keyword(s):  
Aqueous Solutions ◽  
Lead Ions ◽  
Pine Cone

Removal of copper(II) and cadmium(II) ions from aqueous solutions by biosorption onto pine cone

2012 ◽  
Vol 66 (3) ◽  
pp. 564-572 ◽  
Author(s):  
Görkem Değirmen ◽  
Murat Kılıç ◽  
Özge Çepelioğullar ◽  
Ayşe E. Pütün
Keyword(s):  
Aqueous Solutions ◽  
Metal Ion ◽  
Low Cost ◽  
Ion Concentration ◽  
Isotherm Models ◽  
Diffusion Kinetic ◽  
Biosorption Process ◽  
Biosorption Mechanism ◽  
Pine Cone ◽  
Pseudo Second Order

In this study, the removal of copper(II) and cadmium(II) ions from aqueous solutions by biosorption onto pine cone was studied. Variables that affect the biosorption process such as pH, biosorbent dosage, initial metal ion concentration, contact time and temperature of solution were optimized. Experimental data were fitted to Langmuir, Freundlich, Dubinin Radushkevich and Temkin isotherm models to investigate the equilibrium isotherms. Pseudo-first-order, pseudo-second-order and intraparticle diffusion kinetic models were used to determine the biosorption mechanism. The thermodynamics of biosorption were studied for predicting the nature of biosorption. Experimental results showed that pine cone could be evaluated as an alternative precursor for removal of heavy metal ions from aqueous solutions, due to its high biosorption capacity, availability, and low cost.

Removal of lead(II) ions from aqueous solutions by adsorption onto pine cone activated carbon

Desalination ◽  
2011 ◽  
Vol 276 (1-3) ◽  
pp. 53-59 ◽  
Author(s):  
Milan Momčilović ◽  
Milovan Purenović ◽  
Aleksandar Bojić ◽  
Aleksandra Zarubica ◽  
Marjan Ranđelović
Keyword(s):  
Activated Carbon ◽  
Aqueous Solutions ◽  
Pine Cone

scholarly journals Pine cone scale-inspired motile origami

2017 ◽  
Vol 9 (6) ◽  
pp. e389-e389 ◽  
Author(s):  
Kahye Song ◽  
Sang Joon Lee
Keyword(s):  
Pine Cone ◽  
Cone Scale

Ultrathin frozen sections of yeast without aldehyde prefixation

1978 ◽  
Vol 36 (2) ◽  
pp. 58-59
Author(s):  
K. J. Böhm ◽  
a. E. Unger
Keyword(s):  
Aqueous Solutions ◽  
Biological Material ◽  
Yeast Cells ◽  
Frozen Sections ◽  
Good Preservation ◽  
Ultrathin Frozen Sections

During the last years it was shown that also by means of cryo-ultra-microtomy a good preservation of substructural details of biological material was possible. However the specimen generally was prefixed in these cases with aldehydes.Preparing ultrathin frozen sections of chemically non-prefixed material commonly was linked up to considerable technical and manual expense and the results were not always satisfying. Furthermore, it seems to be impossible to carry out cytochemical investigations by means of treating sections of unfixed biological material with aqueous solutions.We therefore tried to overcome these difficulties by preparing yeast cells (S. cerevisiae) in the following manner:

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