Citric Acid Functionalizing Wheat Straw as Sorbent for Copper Removal from Aqueous Solution

2008 ◽  
Vol 54 (2) ◽  
pp. 174-178 ◽  
Author(s):  
Renmin Gong ◽  
Rui Guan ◽  
Jiajing Zhao ◽  
Xingyan Liu ◽  
Shoujun Ni
Keyword(s):  
Aqueous Solution ◽  
Citric Acid ◽  
Wheat Straw ◽  
Copper Removal

Magnetic Citric Acid-Modified Cellulose for the Removal of Copper Ions from Aqueous Solution

2018 ◽  
Vol 934 ◽  
pp. 181-186 ◽  
Author(s):  
Clare L. Garing ◽  
Jimyl M. Arabit ◽  
Lady Catherine C. Elec ◽  
Ramon Christian P. Eusebio ◽  
Ruby Lynn G. Ventura ◽  
...  
Keyword(s):  
Aqueous Solution ◽  
Citric Acid ◽  
Chemical Modification ◽  
Copper Ions ◽  
Freundlich Isotherm ◽  
Copper Removal ◽  
Magnetic Sorbent ◽  
Cellulose Material ◽  
Regeneration Study ◽  
Modified Cellulose

Magnetic citric acid-modified cellulose was successfully produced and tested for the removal of copper in aqueous solution. Initially, the cellulose material was reacted with citric acid solution. The modified cellulose was then attached to the Fe2O3nanoparticle producing an adsorptive magnetic material. Characterization using scanning electron microscopy (SEM) and Fourier transform infrared (FTIR) spectroscopy indicated successful binding and chemical modification of the cellulose. Its adsorption was also studied to evaluate its potential in removing heavy metals such as copper. Removal of copper was as high as 84.74% in solution containing 25 mg/L copper. The sorption of copper in the magnetic sorbent follows second-order kinetics and best fits Freundlich isotherm model. The developed material has a strong magnetic response, thus its recovery in the aqueous solution could be easily facilitated using a magnetic field. Regeneration study indicated high recovery efficiency maintaining above 95.7% copper removal efficiency after three cycles of use. Thus, a highly efficient magnetic adsorptive material was produced using simple chemical modification aside from its easy recovery in the water.

ADSORPTION OF LEAD AND COPPER FROM AQUEOUS SOLUTION USING UNMODIFIED WHEAT STRAW

2013 ◽  
Vol 12 (11) ◽  
pp. 2117-2124 ◽  
Author(s):  
Mehwish Anis ◽  
Sajjad Haydar ◽  
Abdul Jabbar Bari
Keyword(s):  
Aqueous Solution ◽  
Wheat Straw

Citric acid modified waste cigarette filters for adsorptive removal of methylene blue dye from aqueous solution

2021 ◽  
pp. 50655
Author(s):  
Aafia Tehrim ◽  
Min Dai ◽  
Xiange Wu ◽  
Malik Muhammad Umair ◽  
Imran Ali ◽  
...  
Keyword(s):  
Aqueous Solution ◽  
Methylene Blue ◽  
Citric Acid ◽  
Blue Dye ◽  
Methylene Blue Dye ◽  
Adsorptive Removal

Silk fibroin/nylon-6 blend nanofilter matrix for copper removal from aqueous solution

2014 ◽  
Vol 17 (4) ◽  
pp. 921-934 ◽  
Author(s):  
Eda Yalçın ◽  
Serap Gedikli ◽  
Ahmet Çabuk ◽  
Zeynep Karahaliloğlu ◽  
Murat Demirbilek ◽  
...  
Keyword(s):  
Aqueous Solution ◽  
Silk Fibroin ◽  
Nylon 6 ◽  
Copper Removal

scholarly journals Citric Acid Enhanced Copper Removal by a Novel Multi-amines Decorated Resin

2015 ◽  
Vol 5 (1) ◽  
Author(s):  
Chen Ling ◽  
Fuqiang Liu ◽  
Zhiguo Pei ◽  
Xiaopeng Zhang ◽  
Mengmeng Wei ◽  
...  
Keyword(s):  
Citric Acid ◽  
Copper Removal

scholarly journals Copper removal from aqueous solution using biochar: Effect of chemical activation

2014 ◽  
Vol 7 (1) ◽  
pp. 43-52 ◽  
Author(s):  
Lukáš Trakal ◽  
Roman Šigut ◽  
Hana Šillerová ◽  
Dagmara Faturíková ◽  
Michael Komárek
Keyword(s):  
Aqueous Solution ◽  
Chemical Activation ◽  
Copper Removal

scholarly journals Adsorption of heavy metals and methylene blue from aqueous solution with citric acid modified peach stone

2018 ◽  
Vol 53 (11) ◽  
pp. 1678-1688 ◽  
Author(s):  
Junhua Yan ◽  
Guihong Lan ◽  
Haiyan Qiu ◽  
Chao Chen ◽  
Yongqiang Liu ◽  
...  
Keyword(s):  
Heavy Metals ◽  
Aqueous Solution ◽  
Methylene Blue ◽  
Citric Acid

scholarly journals Citric Acid Capped CdS Quantum Dots for Fluorescence Detection of Copper Ions (II) in Aqueous Solution

Nanomaterials ◽  
2018 ◽  
Vol 9 (1) ◽  
pp. 32 ◽  
Author(s):  
Zhezhe Wang ◽  
Xuechun Xiao ◽  
Tong Zou ◽  
Yue Yang ◽  
Xinxin Xing ◽  
...  
Keyword(s):  
Aqueous Solution ◽  
Quantum Dots ◽  
Citric Acid ◽  
Limit Of Detection ◽  
Copper Ions ◽  
High Sensitivity ◽  
Fluorescence Sensor ◽  
Cds Quantum Dots ◽  
Detection Range ◽  
Cds Qds

Citric acid capped CdS quantum dots (CA-CdS QDs), a new assembled fluorescent probe for copper ions (Cu2+), was synthesized successfully by a simple hydrothermal method. In this work, the fluorescence sensor for the detection of heavy and transition metal (HTM) ions has been extensively studied in aqueous solution. The results of the present study indicate that the obtained CA-CdS QDs could detect Cu2+ with high sensitivity and selectivity. It found that the existence of Cu2+ has a significant fluorescence quenching with a large red shifted (from greenish-yellow to yellowish-orange), but not in the presence of 17 other HTM ions. As a result, Cu2S, the energy level below the CdS conduction band, could be formed at the surface of the CA-CdS QDs and leads to the quenching of fluorescence of CA-CdS QDs. Under optimal conditions, the copper ions detection range using the synthesized fluorescence sensor was 1.0 × 10‒8 M to 5.0 × 10‒5 M and the limit of detection (LOD) is 9.2 × 10‒9 M. Besides, the as-synthesized CA-CdS QDs sensor exhibited good selectivity toward Cu2+ relative to other common metal ions. Thus, the CA-CdS QDs has potential applications for detecting Cu2+ in real water samples.

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