Experimental study of TNT wastewater treatment by AlCl3 modified bentonite

doi:10.11894/iwt.2019-0609

Abstract

Abstract:

Various parameters affecting the adsorption of TNT on inorganic modified bentonite, such as preparation methods of AlCl₃ modified bentonite, the dosage of AlCl₃, pH, input of modified bentonite, oscillation frequency were investigated. The results showed that modified bentonite prepared by wet mixing AlCl₃ and bentonite and roasting has the best adsorption performance. The optimum process conditions for TNT wastewater treatment is:wastewater pH 7, oscillation frequency 120 r/min, Al³⁺ to bentonite mass ratio 1:20, the mass concentration of modified bentonite 50 g/L. The removal rate of TNT reached 98.4% in 50 mg/L TNT wastewater at 30℃ and 1 h oscillation time.

Key words: TNT wastewater, aluminium chloride, bentonite

摘要：

研究了AlCl₃改性膨润土的制备方法、AlCl₃的用量、pH、改性膨润土投入量、振荡频率等因素对改性膨润土处理TNT废水效果的影响。实验结果表明：采用AlCl₃与膨润土湿混再焙烧制备的改性膨润土性能最好；处理TNT废水的最佳工艺为：废水的pH为7，振荡频率为120 r/min，Al³⁺与膨润土的质量比1：20，改性膨润土投加质量浓度为50 g/L。在振荡时间为1 h，温度为30℃，50 mg/L的TNT废水中TNT去除率达98.4%。

关键词: TNT废水, 氯化铝, 膨润土

CLC Number:

TQ424.2
X789

Yusiyang Xiang,Guiping Wang. Experimental study of TNT wastewater treatment by AlCl₃ modified bentonite[J]. Industrial Water Treatment, 2020, 40(7): 80-82, 86.

向宇思阳,王桂萍. AlCl₃改性膨润土处理TNT废水的实验研究[J]. 工业水处理, 2020, 40(7): 80-82, 86.

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URL: https://www.iwt.cn/EN/10.11894/iwt.2019-0609

https://www.iwt.cn/EN/Y2020/V40/I7/80

Figures/Tables 3

References 15

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水平	因素
水平	A（pH）	B（改性膨润土投入量）/（g·L^-1）	C（Al³⁺与膨润土质量比）	D（振荡频率）/（r·min^-1）
Ⅰ	7	5	1:50	120
Ⅱ	8	6	1:20	140
Ⅲ	9	7	1:10	160

水平	因素
水平	A（pH）	B（改性膨润土投入量）/（g·L^-1）	C（Al³⁺与膨润土质量比）	D（振荡频率）/（r·min^-1）
Ⅰ	7	5	1:50	120
Ⅱ	8	6	1:20	140
Ⅲ	9	7	1:10	160

序号	A	B	C	D	去除率/%
1	7	5	1:50	120	96.78
2	7	6	1:20	140	96.02
3	7	7	1:10	160	94.17
4	8	7	1:50	140	93.36
5	8	5	1:20	160	95.47
6	8	6	1:10	120	93.87
7	9	6	1:50	160	89.04
8	9	7	1:20	120	98.33
9	9	5	1:10	140	95.32

序号	A	B	C	D	去除率/%
1	7	5	1:50	120	96.78
2	7	6	1:20	140	96.02
3	7	7	1:10	160	94.17
4	8	7	1:50	140	93.36
5	8	5	1:20	160	95.47
6	8	6	1:10	120	93.87
7	9	6	1:50	160	89.04
8	9	7	1:20	120	98.33
9	9	5	1:10	140	95.32

	A/%	B/%	C/%	D%
K_1j	286.97	287.58	279.18	288.98
K₂j	282.7	278.93	289.83	284.71
K₃j	282.7	285.87	283.35	278.68
W₁j	0.95	1.15	-1.65	1.62
W₂j	-0.48	-1.73	1.9	0.19
W_3j	-0.48	0.58	-0.26	-1.82
R_j	1.43	2.88	3.55	3.44

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Experimental study of TNT wastewater treatment by AlCl₃ modified bentonite

AlCl₃改性膨润土处理TNT废水的实验研究

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