Wood (Bagassa guianensis Aubl) and green coconut mesocarp (cocos nucifera) residues as textile dye removers (Remazol Red and Remazol Brilliant Violet)

被引：32

作者：

Monteiro, Monica S. ^{[1
]}

de Farias, Robson F. ^{[2
]}

Pestana Chaves, Jose Alberto ^{[1
]}

Santana, Sirlane A. ^{[1
]}

Silva, Hildo A. S. ^{[1
]}

Bezerra, Cicero W. B. ^{[1
]}

机构：

[1] Univ Fed Maranhao, Dept Quim, Ave Portugueses S-N, BR-65080040 Sao Luis, MA, Brazil

[2] Univ Fed Rio Grande do Norte, Cx Postal 1664, BR-59078970 Natal, RN, Brazil

来源：

JOURNAL OF ENVIRONMENTAL MANAGEMENT | 2017年 / 204卷

关键词：

Adsorption; Agricultural waste; Textile dyes; AQUEOUS-SOLUTIONS; ADSORPTION; ADSORBENTS; WASTE;

D O I：

10.1016/j.jenvman.2017.08.033

中图分类号：

X [环境科学、安全科学];

学科分类号：

08 ; 0830 ;

摘要：

In this work the efficiency of two lignocellulosic waste materials, wood residues and coconut mesocarp, were investigated as adsorbents towards two representative textile dyes (Remazol Red, RR and Remazol Brilliant Violet, RBV). The moisture, carbohydrate, protein, lipid, ash and fiber contents of both natural matrices were characterized. The materials were also characterized by infrared spectroscopy, X-ray diffractometry, scanning electron microscopy, specific surface area analysis and thermogravimetry. The adsorption of dyes was monitored by using UV Vis spectrophotometry. It was verified that both, coconut mesocarp (CM) and wood residues can act as effective adsorbents towards the investigated dyes. It is verified that the maximum adsorption capacity PM (mg g(-1)) for RBV and RR are 7.28 and 3.97 towards CM and 0.64 and 0.71 towrads SD. Furthermore, it was verified that the adsorption is strongly pH dependent and, as a general behavior, an increase in the pH value is associated with a decrease of the total amount of adsorbed dye. The adsorption of violet dye onto coconut mesocarp is well described by the Langmuir model, while all the remazol red fitted better with the Freundlich equation. (C) 2017 Elsevier Ltd. All rights reserved.

引用

页码：23 / 30

页数：8

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