表面活性剂复配体系修复芘污染土壤实验

doi:10.16085/j.issn.1000-6613.2020-1358

化工进展 ›› 2021, Vol. 40 ›› Issue (6): 3526-3535.DOI: 10.16085/j.issn.1000-6613.2020-1358

表面活性剂复配体系修复芘污染土壤实验

李薇¹(), 王信粉¹, 时利香¹, 宋瑶¹, 张杰², 杜显元³

^1.华北电力大学教育部资源与环境系统优化重点实验室，北京 102206
^2.中石油管道有限责任公司西部分公司，新疆乌鲁木齐 830013
^3.中国石油集团安全环保技术研究院有限公司石油石化污染物控制与处理国家重点实验室，北京 102206

收稿日期:2020-07-14 修回日期:2020-09-10 出版日期:2021-06-06 发布日期:2021-06-22
通讯作者: 李薇
作者简介:李薇（1974—），女，教授，博士生导师，研究方向为环境污染防治技术和能源环境工程。E-mail：925657837@qq.com。
基金资助:
国家重点研发计划(2018YFE0196000)

Remediation of pyrene-contaminated soil using mixed surfactants solution

LI Wei¹(), WANG Xinfen¹, SHI Lixiang¹, SONG Yao¹, ZHANG Jie², DU Xianyuan³

^1.Key Laboratory of Resource and Environmental System Optimization, Ministry of Education, North China Electric Power University, Beijing 102206, China
^2.PetroChina West Pipeline Company, Urumqi 830013, XinJiang, China
^3.State Key Laboratory of Petroleum Pollution Control, CNPC Institute of Safety and Environmental Protection Technology, Beijing 102206, China

Received:2020-07-14 Revised:2020-09-10 Online:2021-06-06 Published:2021-06-22
Contact: LI Wei

摘要/Abstract

摘要：

以芘污染土壤为对象，利用阴离子表面活性剂鼠李糖脂和非离子表面活性剂皂素进行复配实验，得出最佳复配比并对污染土壤进行修复处理；其次，研究表面活性剂浓度、pH及CaCl₂、MgCl₂、KCl三种离子浓度、洗脱液的回收次数等单因素对洗脱效果的影响；然后利用响应曲面分析，确定影响洗脱效果的主效应因素及其交互作用强度；最后用Box-Behnken模型优化复配体系处理芘污染土壤的实验条件。结果表明：①当复配比为0.2时，鼠李糖脂-皂素混合溶液的表面张力最低，对芘的协同增溶效果最好；②复配体系处理芘污染土壤的单因素实验中，复配药剂浓度、pH、Mg²⁺浓度分别达到1800mg/L、8、0.1mmol/L时，洗脱效率最高；③环境因素对芘去除效果的影响从大到小依次为pH>表面活性剂浓度>Mg²⁺浓度，表面活性剂浓度与pH对芘的洗脱产生较大的交互影响作用，而pH与盐浓度的交互作用最微弱；④Box-Behnken模型优化后得出最佳组合是混合表面活性剂浓度为1900mg/L、pH为5、Mg²⁺浓度为0.2mmol/L，得到的洗脱效率为89.25%。

关键词: 芘污染土壤, 鼠李糖脂, 皂素, 复配, 芘洗脱率, 优化设计

Abstract:

The remediation potential of pyrene contaminated soil by anionic-nonionic mixed surfactants were texted in this study. Firstly, the best ratio of mixed surfactants with rhamnolipid and saponin was obtained through measured surface tension. Secondly, the influence of single factors such as surfactant concentration, pH, CaCl₂, MgCl₂, KCl ionic strength and the number of recovery of eluent on the elution effect were studied by complete randomalized design. Then, response surface methodology (RSM) was used to screen out the main influencing factors affected the elution repair effect and texted their interaction intensity. Finally, the optimal elution condition of pyrene contaminated soil by mixed surfactants was established by Box-Behnken design. The main results of this study were shown as follows: ①mixed surfactants with rhamnolipid and saponin can synergistically reduce surface tension of solution and enhance the elution of pyrene in contaminated soils, mass ratio of 0.2 mixed surfactants with hamnolipid-saponin had the lowest surface tension and the best synergistic solubilization effect on pyrene. ②In the single-factor experiment of the mixed surfactants on the pyrene contaminated soil, the highest elution efficiency was got at mixed surfactants concentration, pH and Mg²⁺ reached 1800mg/L, 8 and 0.1mmol/L, respectively. ③According to the response surface analysis, the influence of environmental factors on the removal effect of pyrene was in order of pH>surfactant concentration>Mg²⁺ concentration. The mixed surfactants concentration and pH had the best interaction effect on the elution of pyrene, while the interaction between pH and salinity was the weakest. ④After the optimization of the Box-Behnken design, the optimal experimental conditions with the mixed surfactants concentration of 1900mg/L, pH of 5 and Mg²⁺concentration of 0.2mmol/L were determined, and the removal efficiency of pyrene reached 89.25%.

Key words: pyrene-contaminated soil, rhamnolipid, saponin, mixing, pyrene elution efficiency, optimal design

中图分类号:

李薇, 王信粉, 时利香, 宋瑶, 张杰, 杜显元. 表面活性剂复配体系修复芘污染土壤实验[J]. 化工进展, 2021, 40(6): 3526-3535.

LI Wei, WANG Xinfen, SHI Lixiang, SONG Yao, ZHANG Jie, DU Xianyuan. Remediation of pyrene-contaminated soil using mixed surfactants solution[J]. Chemical Industry and Engineering Progress, 2021, 40(6): 3526-3535.

图/表 16

参考文献 31

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鼠李糖脂α	皂素1-α
0	1
0.1	0.9
0.2	0.8
0.3	0.7
0.4	0.6
0.5	0.5
0.6	0.4
0.7	0.3
0.8	0.2
0.9	0.1
1	0

鼠李糖脂α	皂素1-α
0	1
0.1	0.9
0.2	0.8
0.3	0.7
0.4	0.6
0.5	0.5
0.6	0.4
0.7	0.3
0.8	0.2
0.9	0.1
1	0

参数	试验梯度
浓度/mg·L^-1	200、800、1000、1400、1800、2000
pH	2、4、6、8、10、12
低无机盐浓度/mmol·L^-1	0.01、0.05、0.1、0.2、0.3
高无机盐浓度/mmol·L^-1	10、50、100、200、300
洗脱液次数	0、1、2、3

参数	试验梯度
浓度/mg·L^-1	200、800、1000、1400、1800、2000
pH	2、4、6、8、10、12
低无机盐浓度/mmol·L^-1	0.01、0.05、0.1、0.2、0.3
高无机盐浓度/mmol·L^-1	10、50、100、200、300
洗脱液次数	0、1、2、3

数据源	总方差	自由度	平均方差	F	P
模型	1505.36	9	167.26	9.57	0.0035
A	132.79	1	132.79	7.6	0.0282
B	302.88	1	302.88	17.33	0.0042
C	70.3	1	70.3	4.02	0.0849
AB	323.14	1	323.14	18.49	0.0036
AC	80.7	1	80.7	4.62	0.0687
BC	29.22	1	29.22	1.67	0.237
A²	153.25	1	153.25	8.77	0.0211
B²	301.5	1	301.5	17.25	0.0043
C²	59	1	59	3.38	0.1087
残差	122.32	7	17.47
失拟值	100	3	33.33	5.97	0.0585
纯误差	22.32	4	5.58
总和	1627.68	16
R²	0.9445
调整的R²	0.9249
预测的R²	0.8282

表面活性剂复配体系修复芘污染土壤实验

Remediation of pyrene-contaminated soil using mixed surfactants solution

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图/表 16

参考文献 31

相关文章 15

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Metrics

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编号	A：表面活性剂浓度 /mg·L^-1		B：pH		C：MgCl₂浓度 /mmol·L^-1
编号	编码水平	实际水平	编码水平	实际水平	编码水平	实际水平
1	-1	800	0	8	1	0.3
2	0	1400	0	8	0	0.2
3	1	2000	0	8	1	0.3
4	0	1400	1	12	-1	0.1
5	1	2000	1	12	0	0.2
6	0	1400	1	12	1	0.3
7	-1	800	-1	4	0	0.2
8	0	1400	0	8	0	0.2
9	0	1400	-1	4	-1	0.1
10	1	2000	-1	4	0	0.2
11	0	1400	0	8	0	0.2
12	-1	800	0	8	-1	0.1
13	0	1400	-1	4	1	0.3
14	1	2000	0	8	-1	0.1
15	0	1400	0	8	0	0.2
16	-1	800	1	12	0	0.2
17	0	1400	0	8	0	0.2

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时间/min	乙腈（质量分数）/%	水（质量分数）/%
0	60	40
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18	100	0

时间/min	乙腈（质量分数）/%	水（质量分数）/%
0	60	40
8	60	40
18	100	0