Removal of methylene blue dye from aqueous solutions by a new chitosan/zeolite composite from shrimp waste: Kinetic and equilibrium study

被引：76

作者：

Dehghani, Mohammad Hadi ^{[1
,2
]}

Dehghan, Aliakbar ^{[1
]}

Alidadi, Hossein ^{[3
]}

Dolatabadi, Maryam ^{[3
]}

Mehrabpour, Marjan ^{[3
]}

Converti, Attilio ^{[4
]}

机构：

[1] Univ Tehran Med Sci, Sch Publ Hlth, Dept Environm Hlth Engn, Tehran, Iran

[2] Inst Environm Res, Ctr Solid Waste Res, Tehran, Iran

[3] Mashhad Univ Med Sci, Sch Hlth, Dept Environm Hlth Engn, Hlth Sci Res Ctr, Mashhad, Iran

[4] Univ Genoa, Dept Civil Chem & Environm Engn, Chem Engn Pole, Via Opera Pia 15, I-16145 Genoa, Italy

来源：

KOREAN JOURNAL OF CHEMICAL ENGINEERING | 2017年 / 34卷 / 06期

关键词：

Methylene Blue Dye; Shrimp Wastes; Chitosan; Zeolite; RESPONSE-SURFACE METHODOLOGY; COMMERCIAL ACTIVATED CARBON; LOW-COST ADSORBENT; REACTIVE DYES; EFFICIENT REMOVAL; HUMIC-ACID; AZO-DYE; ADSORPTION; WATER; SHELL;

D O I：

10.1007/s11814-017-0077-2

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

The adsorption of methylene blue dye (MBD) from aqueous solutions was investigated using a new composite made up of shrimp waste chitosan and zeolite as adsorbent. Response surface methodology (RSM) was used to optimize the effects of process variables, such as contact time, pH, adsorbent dose and initial MBD concentration on dye removal. The results showed that optimum conditions for removal of MBD were adsorbent dose of 2.5 g/L and pH of 9.0, and initial MBD concentration of 43.75mg/L and contact time of 138.65 min. The initial concentration of dye had the greatest influence on MBD adsorption among other variables. The experimental data were well fitted by the pseudo-second order kinetic model, while the Freundlich isotherm model indicated a good ability for describing equilibrium data. According to this isotherm model, maximum adsorption capacity of the composite was 24.5mg/g. Desorption studies showed that the desorption process is favored at low pH under acidic conditions.

引用

页码：1699 / 1707

页数：9

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