Simultaneous removal of arsenite and cadmium by a manganese-crosslinking sodium alginate modified biochar and zerovalent iron composite from aqueous solutions

2022 ◽  
Author(s):  
Wei Mao ◽  
Lixun Zhang ◽  
Ying Zhang ◽  
Yuntao Guan
Keyword(s):  
Aqueous Solutions ◽  
Sodium Alginate ◽  
Zerovalent Iron ◽  
Contaminated Water ◽  
Simultaneous Removal ◽  
Modified Biochar

A novel manganese-crosslinking sodium alginate modified biochar and zerovalent iron composite (Mn/SA-BC@nZVI) was prepared for the simultaneous removal of arsenite (As(iii)) and cadmium (Cd(ii)) from contaminated water.

scholarly journals Fabrication of nano zero valent iron/biopolymer composite with antibacterial properties for simultaneous removal of nitrate and humic acid: Kinetics and isotherm studies

2021 ◽  
Author(s):  
Nazanin Zahra Pourbaghaei ◽  
Mansoor Anbia ◽  
Fatemeh Rahimi
Keyword(s):  
Humic Acid ◽  
Aqueous Solutions ◽  
Desirability Function ◽  
Aqueous Media ◽  
Antibacterial Properties ◽  
Freundlich Isotherm ◽  
Zerovalent Iron ◽  
Simultaneous Removal ◽  
High Antibacterial Activity ◽  
Isotherm Adsorption

Abstract This investigation compared the adsorption behavior of humic acid (HA) on cellulose, chitosan and nano zerovalent iron/chitosan (nZVI/chitosan). Results show that nZVI/chitosan is very effective in the adsorption of HA from aqueous media. The feasibility of using nZVI/chitosan as an adsorbent for the simultaneous removal of nitrate and HA from aqueous media was also studied. Structural analyses of the samples were identified by TEM, FT-IR, EDX, XRD and N2 isotherms. The effects of pH, amount of composite, nitrate concentration, HA concentration and contact time and their interactions on responses were explored by central composite design (CCD) and response surface methodology (RSM). The optimal conditions of pH (5.5), adsorbent amount (0.098 g), reaction time (27 min) and initial concentrations (110 mg/L for nitrate and 30 mg/L for HA) were obtained from desirability function. The adsorption properties of the resulting nanocomposite toward nitrate and HA were investigated through kinetic and isotherm adsorption studies. The adsorption kinetics was found to fit the pseudo-second order model. The results obtained indicate that nitrate uptake fitted well with the Langmuir model while the Freundlich isotherm was the best model for describing the multilayer uptake of HA from aqueous solutions. Moreover, nZVI/chitosan nanocomposite illustrates a very high antibacterial activity against pathogen bacteria strains such as Staphylococcus aureus ATCC 25935, ATCC 25923, and Pseudomonas aeruginosa ATCC 27853. The findings reported in this investigation highlight the potential of using nZVI/chitosan as a promising adsorbent for the simultaneous removal of nitrate and HA from aqueous solutions.

Quantitative analysis on the mechanism of Cd2+ removal by MgCl2-modified biochar in aqueous solutions

2021 ◽  
pp. 126487
Author(s):  
Guangcai Yin ◽  
Lin Tao ◽  
Xinglin Chen ◽  
Nanthi S. Bolan ◽  
Binoy Sarkar ◽  
...  
Keyword(s):  
Quantitative Analysis ◽  
Aqueous Solutions ◽  
Modified Biochar

Simultaneous removal of phosphate and nitrite ions from aqueous solutions using modified soybean waste

2016 ◽  
Vol 35 ◽  
pp. 287-294 ◽  
Author(s):  
Fumihiko Ogata ◽  
Ayaka Ueda ◽  
Shigeharu Tanei ◽  
Daisuke Imai ◽  
Naohito Kawasaki
Keyword(s):  
Aqueous Solutions ◽  
Simultaneous Removal

Effective Removal of Azo Dye Reactive Blue 222 from Aqueous Solutions Using Modified Magnetic Nanoparticles with Sodium Alginate/Hydrogen Peroxide

2018 ◽  
Vol 38 (s1) ◽  
pp. S205-S213 ◽  
Author(s):  
Reza Shokoohi ◽  
Zahra Torkshavand ◽  
Mohammad Molla Mahmoudi ◽  
Abbas Moradi Behgoo ◽  
Effat Ghaedrahmati ◽  
...  
Keyword(s):  
Hydrogen Peroxide ◽  
Magnetic Nanoparticles ◽  
Aqueous Solutions ◽  
Sodium Alginate ◽  
Azo Dye ◽  
Effective Removal ◽  
Modified Magnetic Nanoparticles

Fabrication of an efficient ZIF-8 alginate composite hydrogel material and its application for enhanced copper (II) adsorption from aqueous solutions

2021 ◽  
Author(s):  
Xiao Zhang ◽  
Zhiyue Li ◽  
Taoyi Zhang ◽  
Jing Chen ◽  
Wenxi Ji ◽  
...  
Keyword(s):  
Aqueous Solutions ◽  
Sodium Alginate ◽  
Composite Hydrogel ◽  
Alginate Hydrogel ◽  
Zeolitic Imidazolate Framework ◽  
Composite Bead ◽  
Hydrogel Beads

A novel zeolitic imidazolate framework-8 (ZIF-8) alginate composite hydrogel material (PVA/SA@ZIF-8) is alginate composite bead which was fabricated by grafting ZIF-8 on the surface of the sodium alginate hydrogel beads...

Effects of modified biochar on As-contaminated water and soil: A recent update

2021 ◽  
pp. 107-136
Author(s):  
Jingzi Beiyuan ◽  
Yiyin Qin ◽  
Qiqi Huang ◽  
Hailong Wang ◽  
Daniel C.W. Tsang ◽  
...  
Keyword(s):  
Contaminated Water ◽  
Modified Biochar

Simultaneous removal of Hg2+, Pb2+ and Cd2+ from aqueous solutions on multifunctional MoS2

2019 ◽  
Vol 296 ◽  
pp. 111987 ◽  
Author(s):  
Chang Liu ◽  
Shilin Zeng ◽  
Bingqiao Yang ◽  
Feifei Jia ◽  
Shaoxian Song
Keyword(s):  
Aqueous Solutions ◽  
Simultaneous Removal
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