کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
5156682 | 1500586 | 2017 | 40 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Preparation and characterization of poly(maleic acid)-grafted cross-linked chitosan microspheres for Cd(II) adsorption
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کلمات کلیدی
Cd(II) ionEthanol (PubChem CID: 702) - اتانول (PubChem CID: 702)Ethyl acetate (PubChem CID: 8857) - اتیل استات (PubChem CID: 8857)Acetic acid (PubChem CID: 176) - اسید استیک (PubChem CID: 176)Characterization - تعیین مشخصاتAdsorption - جذبMechanism - مکانیسم یا سازوکارHydrogen Peroxide (PubChem CID: 784) - پراکسید هیدروژن (PubChem CID: 784)Chitosan (PubChem CID: 71853) - کیتوزان (PubChem CID: 71853)Glutaraldehyde (Pubchem CID: 3485) - گلوتارالدئید (Pubchem CID: 3485)
موضوعات مرتبط
مهندسی و علوم پایه
شیمی
شیمی آلی
پیش نمایش صفحه اول مقاله
چکیده انگلیسی
A novel adsorbent, composed of poly(maleic acid)-grafted cross-linked chitosan microspheres (PMACCMs), was prepared via cross-linking with glutaraldehyde and modification by grafting maleic acid. FTIR, zeta potential, elemental analysis, 13C NMR, DTG, laser particle size analysis, SEM, and BET methods were applied to characterize PMACCMs, exhibiting a successful fabrication, good thermostability, and well-defined surface microstructure beneficial to Cd(II) adsorption. The effects of pH, contact time, and initial concentration on Cd(II) adsorption were also investigated, and the maximum adsorption capacity was 39.2 mg gâ1, indicating a great improvement as compared with that (14.5 mg gâ1) of cross-linked chitosan microspheres. The experimental data were well fitted with pseudo-second-order kinetic and Langmuir isotherm models. Five-cycle reusability tests demonstrated PMACCMs could be repeatedly used with a small adsorption capacity loss (<15%). Additionally, the adsorption mechanism was proposed. All the results confirmed that PMACCMs, which presented outstanding adsorption capability and reusability, could be a good candidate for wastewater purification.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Carbohydrate Polymers - Volume 172, 15 September 2017, Pages 28-39
Journal: Carbohydrate Polymers - Volume 172, 15 September 2017, Pages 28-39
نویسندگان
Zhenzhen Yu, Qifeng Dang, Chengsheng Liu, Dongsu Cha, Haifeng Zhang, Wenjing Zhu, Qianqian Zhang, Bing Fan,