Chemical Investigation of Mesua nagassarium (Burm. f.) Kosterm

Islam, Ridwan; Ahmed, Iftekhar; Sikder, Al Amin; Haque, Mohammad Rashedul; Al-Mansur, Abdullah; Ahmed, Mansoor; Rasheed, M. Mamoon O.; Rashid, Mohammad A.

doi:10.6000/1927-5129.2014.10.17

Cited by 4 publications

(2 citation statements)

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“…MB is a basic dye that has different applications such as pH indicator, photodynamic therapy, 12 treatment of malaria, 13 staining of cells, 14 etc. A number of compounds, such as agro-industrial waste, 15 magnetite nanoparticles-modified activated carbon, 16 crystalline silica, 17 trisyl silicas, 18 activated carbon, 19 silica gel, 20 wool fiber, 21 sludge-adsorbents, 22 low-cost adsorbents 23 and zeolites 24 have been used for adsorption of these dyes. On the other hand, cellulose is the most abundant organic compound on the earth 25 and is cheap, renewable, and biodegradable.…”

Section: Introductionmentioning

confidence: 99%

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Study of Adsorption of Janus Green B and Methylene Blue on Nanocrystalline Cellulose

Samiey

Tehrani

2014

J Chinese Chemical Soc

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Batch experiments were performed for comparative studies on the adsorption of methylene blue (MB) and janus green B (JG) dyes on nanocrystalline cellulose (NCC) surface from aqueous solutions. In these experiments, effects of initial concentration of adsorbate, temperature and shaking velocity were investigated. The experimental ranges of maximum adsorption capacity of MB and JG on NCC surface were 8.1-8.6 and 22.1-21.5 mg g -1 at 308-328 K, respectively. The kinetic data were studied by the KASRA model and the Elovich, Avrami, KASRA, pseudo-first-order, pseudo-second-order and ideal-second-order equations. Here, it is shown that there are big concerns in relation to using the pseudo-first-and pseudo-second-order equations for adsorption kinetics. Analysis of data by the KASRA model showed the adsorption initial velocity and acceleration values increased with increase in shaking velocity, temperature and adsorbate concentration and decreased from the first to the second region. Results show that adsorption obeys the second-order kinetics in the first and second regions. Due to the non-ideal adsorption of dyes, there are three ideal adsorption rate constants during adsorption kinetics of JG and MB on NCC.(CNW) or nanocrystalline cellulose (NCC). [27][28][29] These nanoparticles are the smaller building blocks released from the original cellulose fibers 30,31 and due to the sulfate esterification, more than one third of hydroxyl groups on the surface of NCC are substituted by sulfate, 32,33 Figure 1(d). Compared to cellulose fibers, NCC possesses high surface area, high specific strength and modulus, and unique optical properties 34 and is used as a template for the synthesis of mesoporous materials, 35 in lithium battery, 36 drug delivery, 37 removal of heavy metals, 38 etc. In this work, we used NCC particles prepared from cotton and studied the effects of temperature, dye concentration, time and shaking rate on adsorption of JG and MB on NCC surface (or dyeing NCC by JG and MB). EXPERIMENTAL Materials:The cellulose material used in this work was commercial cotton linters. H 2 SO 4 , NaOH, janus green B, methylene blue, malachite green and congo red were purchased from Merck.

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Section: Introductionmentioning

confidence: 99%

“…Eqs (21). and(22), based on the assumption that adsorption sites in each region don't affect on each other, are named the idealsecond-order (or abbreviated as ISO) equation and were derived by one of the authors, Babak Samiey.…”

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confidence: 99%