Preparation of chitosan/magnetite composite beads and their application for removal of Pb(II) and Ni(II) from aqueous solution

Tran, Hoang Vinh; Tran, Lam Dai; Thinh, Nguyen An

doi:10.1016/j.msec.2009.11.008

Cited by 344 publications

(75 citation statements)

References 23 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…The damage ability of SA to algal cells can alter the cell structures, but the adsorption changes the shape variations of the heavy metals, thus causing some of the heavy metal ions to not be absorbed by the chitosan, and these ions may affect the determination results by permeating the filter membranes. In conclusion, various factors reduce the overall heavy metal removal ability of algae in this particular algae solution environments, but in the 400 and 550 mg L -1 added concentrations of algicide, the removal rate of Pb was higher than that of Ni, which was consistent with the results of Tran et al (2010), indicating that the heavy adsorption ability of the cross-linked chitosan did not change under the same affecting conditions. In addition, compared with Ni, Pb showed a higher toxicity.…”

Section: Adsorption Capacity Of Algicide To Heavy Metalssupporting

confidence: 81%

Effects of algicide on the growth of Microcystis flos-aquae and adsorption capacity to heavy metals

Liu

Wen

Chen

2014

Int. J. Environ. Sci. Technol.

View full text Add to dashboard Cite

In this paper, the effects of salicylic acid (SA) algicide carried by cross-linked chitosan on the inhibition of Microcystis flos-aquae and the removal ability of heavy metals Pb and Ni in compound polluted water were studied. The results showed that the algicide had significant inhibitory effects on Microcystis flos-aquae: when the concentrations were 550 and 700 mg L -1 , the inhibition time was up to 13 days or more, and the inhibition rate was as high as 99 %. The algicide exhibited strong adsorption capacity to heavy metals Pb and Ni. The adsorption rates of the algicide at concentrations of 400 and 550 mg L -1 on Ni and Pb were 61 and 64.9 %, 71.2 and 72.5 % at 13 days, respectively. The algicide allows a slow release of SA and long-term inhibition of algae and has better adsorption capacity on heavy metals, thus providing a method for the effective control of eutrophication and combined heavy metal pollution in water.

show abstract

Section: Adsorption Capacity Of Algicide To Heavy Metalssupporting

confidence: 81%

Effects of algicide on the growth of Microcystis flos-aquae and adsorption capacity to heavy metals

Liu

Wen

Chen

2014

Int. J. Environ. Sci. Technol.

View full text Add to dashboard Cite

show abstract

“…Composites made from various polysaccharides comprise another class of naturally safe materials for diverse biological and industrial applications. It was stated that magnetic Nano-materials functionalized with biopolymers, for example, chitosan [71,72], gum Arabic [73], β-cyclodextrine [74] and cellulose [75], have been utilized for the exclusion of toxic metals from aqueous solution.…”

Section: Removal Of Heavy Metals By Nanocomposites Based On Biopolymersmentioning

confidence: 99%

Removal of Heavy Metals from Industrial Waste Water by Biomass-Based Materials: A Review

Ms¹,

Arm²

2016

J Pollut Eff Cont

View full text Add to dashboard Cite

The recent researches are moving to removal of the agricultural and industrial pollutants from sewage treatment and discuss the possibility of the re-use of this water for agricultural purposes. The chemical contaminants represent the most dangerous types of contaminants found in the water for a many reasons, they are non-biodegradable environmentally and their high toxicity at very low concentrations in addition to the cumulative impact in the bodies of living organisms. The most toxic heavy metals are lead, mercury and chromium. It was estimated that the estimated that global impact of lead is 18-22 million people and of mercury 15 to 19 million people at 2010 according to Blacksmith Institute's World worst pollution problems. Contamination of the water resources with these elements, leads to polluting of the entire food chain and represents a real threat to the ecosystem. Thus, pure water shortage becomes a crucial problem worldwide. Among the most important research that can contribute to solving the problem of those related to water purification and improving the quality and re-use even in agriculture, for example, instead of wasted and discarded. There are many scientific methods applied in this regard. They include adsorption, precipitation, ion exchange, reverse osmosis, electrochemical treatments, membrane filtration, evaporation, flotation, and oxidation and biosorption processes. Some of these techniques however, have disadvantages such as incomplete metal removal, high reagent and energy requirements and generation of toxic sludge or other waste products. Among all these techniques, the adsorption is economically favorable and technically easy to separate. Instead of using commercial materials researchers have worked on inexpensive materials such as natural and agricultural products. Several works concerned the removal of heavy metals but the present work focuses on the sorbents based on biomass and their efficiency in removal of heavy metals from waste water.

show abstract

“…Magnetic Fe 3 O 4 nanoparticles were prepared by coprecipitation method [27][28][29]. First, 5.4 g of FeCl 3 ·6H 2 O and 2.8 g of FeSO 4 ·7H 2 O were dissolved into 100 mL of deoxygenated distilled water.…”

Section: Preparation Of Fe 3 O 4 Mcts and G-mcts Nanoparticlesmentioning

confidence: 99%

Methylene Blue Adsorption by Novel Magnetic Chitosan Nanoadsorbent

Zhu

Zhang

Yan

2016

J. of Wat. & Envir. Tech.

View full text Add to dashboard Cite

A novel magnetic nanoadsorbent (magnetic chitosan modified by N,N-bis (carboxymethyl) glutamic acid, G-MCTS for short) was prepared by covalent binding of tetrasodium of N,N-bis (carboxymethyl) glutamic acid onto the surface of chitosan-coated Fe 3 O 4 nanoparticles. The adsorbent was characterized by scanning electron microscopy, infrared spectrum, vibrating sample magnetometer and X-ray powder diffractometer. It was found that G-MCTS had a spherical structure with a particle size ranging from 100 − 150 nm and a saturation magnetization value of 21 emu/g. Meanwhile, the adsorption performances of G-MCTS were tested with adsorption of methylene blue. Correspondingly, the adsorption effect factors (initial concentration, solution pH, contact time and temperature), adsorption kinetics, isotherms and adsorption thermodynamics were investigated in detail. Results showed that the adsorption could reach equilibrium within 30 min, besides, the adsorption kinetics accepted the pseudo-second-order kinetic model, and the adsorption isotherm data fit with Freundlich model as well as Langmuir model. More importantly, the maximum adsorption capacity was 3.3 g/g obtained by Langmuir model and the adsorption capacity was more than 90% of the initial saturation adsorption capacity after being used for four times. All of these results indicated that, G-MCTS can serve as an effective adsorbent for the adsorption of methylene blue.

show abstract

Preparation of chitosan/magnetite composite beads and their application for removal of Pb(II) and Ni(II) from aqueous solution

Cited by 344 publications

References 23 publications

Effects of algicide on the growth of Microcystis flos-aquae and adsorption capacity to heavy metals

Effects of algicide on the growth of Microcystis flos-aquae and adsorption capacity to heavy metals

Removal of Heavy Metals from Industrial Waste Water by Biomass-Based Materials: A Review

Methylene Blue Adsorption by Novel Magnetic Chitosan Nanoadsorbent

Contact Info

Product

Resources

About