Removal of copper (II) ions by using rice husk ash

Doan Van Hong Thien * , Le Duc Duy , Nguyen Minh Nhut , Pham Thi Me and Pham Hoa Thai

* Corresponding author (dvhthien@ctu.edu.vn)

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Received: 07 Jun 2014
Accepted: 30 Oct 2014
Published: 20 Nov 2014
Title: Removal of copper (II) ions by using rice husk ash
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How to Cite
Thiện, Đ. V. H., Duy, L. Đ., Nhựt, N. M., Mè, P. T., & Thái, P. H. (2014). Removal of copper (II) ions by using rice husk ash. CTU Journal of Science, (34), 45-53. Retrieved from https://ctujsvn.ctu.edu.vn/index.php/ctujsvn/article/view/1380
Issue
No. 34 (2014)
Section
Engineering Technology

Abstract

Rice husk ash was obtained after burning of rice husk in the air. The rice husk ash was then calcinated at 650oC for 1 hour to produce activated rice-husk ash (RHA). The main composition of RHA was is activated silica which can be used to remove Cu(II) ions by batch adsorption method. The IR spectra, XRD patterns, SEM images and BET adsorption were used to determine the silica structural composition and characteristics of RHA. In this research, The RHA was applied for the removal of Cu(II) ions using by anbatch adsorption method. The batch adsorption was used in this research. The factors affecting the absorption of Cu(II) ions under investigation includedeffects of the main parameters were investigated, including: pH, adsorbent amounts, contact time and the initial concentration of Cu(II). The maximum adsorbtion capacity of RHA for Cu (II) ions was 4,1 mg/g.
Keywords: Rice husk ash, absorption, Cu(II) ions

Tóm tắt

Vỏ trấu được đốt cháy ngoài không khí, sau đó sản phẩm được nung trong lò nung ở nhiệt độ 650oC trong thời gian 1 giờ. Sản phẩm tro trấu (RHA) thu được chứa nhiều silica tinh thể và được ứng dụng cho việc loại bỏ ion Cu(II) bằng phương pháp hấp phụ. Các phương pháp phân tích phổ hồng ngoại (FTIR), phổ nhiễu xạ tia X (XRD), ảnh dưới kính hiển vi điện tử quét (SEM) và hấp phụ BET được sử dụng để xác định thành phần cấu trúc silica trong RHA và các đặc tính của RHA. Bể hấp phụ gián đoạn được tiến hành để khảo sát khả năng loại bỏ ion Cu (II) trong nghiên cứu này. Các yếu tố ảnh hưởng đến quá trình hấp phụ được khảo sát gồm có: pH, lượng chất hấp phụ, thời gian tiếp xúc và nồng độ đầu của ion Cu(II). Dung lượng hấp phụ cực đại của RHA đối với ion Cu(II) là 4,1 mg/g.
Từ khóa: Tro trấu, hấp phụ, ion Cu(II)

Article Details

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