Simultaneous removal of Cr(Ⅵ) and azo dye orange G from aqueous solution using functionalized jute stalk composites as bio-sorbents

doi:10.11894/iwt.2019-0657

Abstract

Abstract:

In this paper, amine-functionalized jute stalk composites(AF-JS) were prepared and employed as adsorbents for simultaneous removal of Cr(Ⅵ) and azo dye orange G(OG). AF-JS adsorbent was characterized by brunauer-emmett-teller(BET), scanning electron microscopy(SEM), fourier transform infrared spectroscopy(FTIR) and X-ray photoelectron spectroscopy(XPS), respectively. The results showed that kinetic data were well described by pseudo-second-order model and the sorption isotherms were well fitted by Langmuir model. The maximum adsorption capacity of AF-JS on Cr(Ⅵ) and OG reached 160.09 and 5 137.5 mg/g, respectively. Competitive adsorption studies showed that the adsorption capacity of AF-JS on Cr(Ⅵ) was suppressed with increasing OG concentration, and vice versa. After the regeneration of AF-JS for three cycles, the removal rates of Cr(Ⅵ) and OG still reached 69.27% and 74.98%, which indicated AF-JS has strong stability and recycling performance.

Key words: modified jute stalk, Cr(Ⅵ), orange G, simultaneous adsorption

摘要：

制备了一种氨基改性黄麻复合材料（AF-JS），并将其应用于同时吸附去除重金属Cr（Ⅵ）和偶氮染料橙黄G（OG），利用BET、SEM、FTIR、XPS等对AF-JS吸附材料进行表征。结果表明，吸附动力学符合伪二阶动力学模型，且Langmuir方程能较好地拟合吸附等温数据，且AF-JS对Cr（Ⅵ）、OG的最大吸附容量分别可达160.09、5 137.5 mg/g。竞争吸附研究发现，OG的存在会抑制AF-JS对Cr（Ⅵ）的吸附，且抑制效果随OG浓度的递增而递增，反之亦然。AF-JS具有强稳定性和循环利用性能，循环使用3次后，对Cr（Ⅵ）和OG的去除率仍分别可达69.27%和74.98%。

关键词: 改性黄麻, 六价铬, 橙黄G, 竞争吸附

CLC Number:

X703.1

Canhui Deng,Jianguang Su,Zhigang Dai,Qing Tang,Zemao Yang,Chaohua Cheng,Ying Xu,Chan Liu,Dongwei Xie,Jiquan Chen. Simultaneous removal of Cr(Ⅵ) and azo dye orange G from aqueous solution using functionalized jute stalk composites as bio-sorbents[J]. Industrial Water Treatment, 2020, 40(5): 94-99.

邓灿辉,粟建光,戴志刚,唐蜻,杨泽茂,程超华,许英,刘婵,谢冬微,陈基权. 改性黄麻生物吸附剂同时去除水体中Cr（Ⅵ）和橙黄G[J]. 工业水处理, 2020, 40(5): 94-99.

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URL: https://www.iwt.cn/EN/10.11894/iwt.2019-0657

https://www.iwt.cn/EN/Y2020/V40/I5/94

Figures/Tables 11

References 28

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样品	BET表面积/（m²·g^-1）	平均孔径/nm	总孔容/（cm³·g^-1）
黄麻	75.84	5.703	0.108 1
AF-JC	52.03	6.518	0.084 8

样品	BET表面积/（m²·g^-1）	平均孔径/nm	总孔容/（cm³·g^-1）
黄麻	75.84	5.703	0.108 1
AF-JC	52.03	6.518	0.084 8

污染物	q_e/（mg·g^-1）	k/（g·mg^-1·min^-1）	R²
Cr（Ⅵ）	82.65	0.011 0	0.999 2
OG	434.78	0.000 2	0.999 6

污染物	q_e/（mg·g^-1）	k/（g·mg^-1·min^-1）	R²
Cr（Ⅵ）	82.65	0.011 0	0.999 2
OG	434.78	0.000 2	0.999 6

污染物	Langmuir			Freundlich
污染物	K_L/（L·mg^-1）	q_m/（mg·g^-1）	R²	K_F/（mg·g^-1）	n	R²
Cr（Ⅵ）	0.008 8	160.09	0.941 7	9.058 3	2.257 8	0.903 7
OG	0.000 2	5 137.5	0.999 1	1.438 5	1.073 9	0.998 9

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