GHÉP ACRYLONITRIL LÊN CHITIN BẰNG KĨ THUẬT BỨC XẠ ĐỂ HẤP PHỤ KIM LOẠI NẶNG ĐỘC (As(V), Cd 2+)
GRAFING ACRYLONITRIL ONTO CHITIN BY PRE-IRRADIATION METHOD FOR ADSORPTION OF TOXIC HEAVY METAL IONS (As(V), Cd2+)
Chitin with low deacetylation degree was obtained by partial deacetylation of chitin. Grafting for incorporation as well as modification of functional groups onto chitin prepared hybrid adsorbents aiming enhancement for adsorption of metal ions was carried out by irradiation technology. In this research, acrylonitril was used to graft onto chitin by pre-irradiation method. The maximal value of grafting degree was found to be 114% at acrylonitril concentration of 40% and the absorbed dose of 25 kGy. The conversion of the cyano group to amidoxime group with reactive agent of hydroxylamine in NaOH at 80oC may attain up 2.13 mmol/g for 6 hours.
The As (V) and Cd2+ adsorption equilibrium onto AN-g-chitin-A fits with the Langmuir isotherm better than the Freundlich one. The adsorption capacities were determined to be 0.88 and 2.09 mg/g for As and Cd respectively. From removing Arsenic and Cadmium in groundwater sample, the chitin-g-AN-A has proved to be a promising material for cleanup of contaminated water by toxic metal ions.
How to Cite
Vietnam Journal of Sciences and Technology (VJST) is an open access and peer-reviewed journal. All academic publications could be made free to read and downloaded for everyone. In addition, Articles are published under term of the Creative Commons Attribution-ShareAlike 4.0 International (CC BY-SA) Licence which permits use, distribution and reproduction in any medium, provided the original work is properly cited & ShareAlike terms followed.
Copyright on any research article published in VJST is retained by the respective author(s), without restrictions. Authors grant VAST Journals System (VJS) a license to publish the article and identify itself as the original publisher. Upon author(s) by giving permission to VJS either via VJS journal portal or other channel to publish their research work in VJS agrees to all the terms and conditions of https://creativecommons.org/licenses/by-sa/4.0/ License and terms & condition set by VJS.
Authors have the responsibility of to secure all necessary copyright permissions for the use of 3rd-party materials in their manuscript.