کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
4482981 1316875 2012 7 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Preparation and characterisation of new-polyaluminum chloride-chitosan composite coagulant
موضوعات مرتبط
مهندسی و علوم پایه علوم زمین و سیارات فرآیندهای سطح زمین
پیش نمایش صفحه اول مقاله
Preparation and characterisation of new-polyaluminum chloride-chitosan composite coagulant
چکیده انگلیسی

In this study, the formulation of a novel polyaluminum chloride-chitosan composite coagulant that improves the coagulation process for natural organic matter (NOM) removal was investigated. The performance of the composite coagulant was tested using two water sources (synthetic and natural water) to develop a better understanding on the behaviour of the composite coagulant. Fourier Transform-Infra red (FT-IR) spectroscopy, ferron analysis and zeta potential studies were performed to characterise the composite coagulant. FT-IR analysis showed that there is an intermolecular interaction between Al species and chitosan molecules, while ferron analysis indicated that the distributions of Ala, Alb, and Alc in PACl-chitosan are different from those in PACl. At a low Al dosage (2.16 mg L−1), a much higher removal of NOM from synthetic water, as evidenced from UV254 and Dissolved Organic Carbon (DOC) measurements, was achieved by the composite coagulants in comparison to that removed by PACl or PACl and chitosan added separately. For natural water from the Myponga Reservoir, both polyaluminum chloride (PACl) and PACl-chitosan composite coagulants demonstrated similar dissolved organic carbon (DOC) percentage removal, whereas PACl-chitosan gave a slight improvement in removing the UV254 absorbing components of NOM.

Figure optionsDownload high-quality image (139 K)Download as PowerPoint slideHighlights
► Synthesis of a novel polyaluminum chloride-chitosan composite coagulant was achieved.
► Chitosan in composite coagulant was shown to improve the coagulation performance.
► There is an intermolecular interaction between Al and chitosan in the composite coagulant.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Water Research - Volume 46, Issue 15, 1 October 2012, Pages 4614–4620
نویسندگان
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