潮滩环境沉积物吸附多环芳烃的粒径因素影响

杨达; 高抒; 李家彪; 邹欣庆; 盛辉

doi:10.16562/j.cnki.0256-1492.2020071401

潮滩环境沉积物吸附多环芳烃的粒径因素影响

1.
海岸与海岛开发教育部重点实验室，南京大学地理与海洋科学学院，南京 210023

2.
海底科学重点实验室，自然资源部第二海洋研究所，杭州 310012

3.
河口海岸学国家重点实验室，华东师范大学海洋科学学院，上海 200241

基金项目: 海洋局专项计划“海岸带动力作用”（GASI-04-CEOGE-01）；中央高校基本科研业务费项目（14380001）

详细信息

作者简介: 杨达（1991—），男，硕士，主要从事海洋海岸环境方面的研究。E-mail：849583923@qq.com

通讯作者: 高抒（1956—），教授，主要从事河口海洋沉积动力学和沉积地质学。E-mail：shugao@nju.edu.cn

中图分类号: P76

收稿日期: 2020-07-14

修回日期: 2020-10-27

刊出日期: 2021-06-28

Adsorption of PAHs by the sediments from the Yangcheng tidal flat: the influence of particle size

1.
Key Laboratory of Coast and Island Development of Ministry of Education, School of Geographic and Oceanographic Sciences, Nanjing University, Nanjing 210023, China

2.
Key Laboratory of Submarine Geosciences, Second Institute of Oceanography, Ministry of Natural Resources, Hangzhou 310012, China

3.
State Key Lab of Estuarine Coastal Research; School of Marine Sciences, East China Normal University, Shanghai 200241, China

More Information

Corresponding author: GAO Shu, shugao@nju.edu.cn

Received Date: 14 July 2020

Revised Date: 27 October 2020

Publish Date: 28 June 2021

摘要

摘要:
为了研究粒径因素对于潮间带沉积物吸附多环芳烃（PAHs）的影响，基于索氏提取法、比值法、统计分析法和室内等温吸附实验以及0～31、32～64 μm和大于64 μm这三种不同粒径的沉积物对于16种多环芳烃各自吸附参数的反演计算，研究盐城潮滩沉积物PAHs赋存状态以及沉积物粒径对PAHs的吸附能力。结果表明，研究地点的潮滩沉积物中PAHs含量为49.67～141.90 ng·g⁻¹，平均为74.92 ng·g⁻¹。沉积物中的PAHs主要以3环、4环和5环为主, 其主要来源为高温燃烧源。在沉积物有机质含量极低时, 粒径对PAHs的吸附起主导作用。
- 沉积物 /
- 多环芳烃（PAHs） /
- 吸附能力 /
- 粒径 /
- 盐城潮滩
Abstract:
In order to study the adsorption behavior of the intertidal sediment adsorption of polycyclic aromatic hydrocarbons (PAHs), we use the Soxhlet extraction method, characteristic ratio method, statistical analysis, isothermal adsorption experiment, together with sediment adsorption parameter modeling and inverse calculations for three different particle size groups (i.e., 0～31 μm, 32～64 μm, and ＞ 64 μm) to identify the influence of particle size on the adsorption parameter. The results reveal that the contents of PAHs varied from 49.67～141.90 ng·g⁻¹, with an average of 74.92 ng·g⁻¹. The PAHs were primarily trinuclear, tetracyclic or pentacyclic, and the surface sediment PAHs in the study area had a mixed origin of combustion. When the organic matter content in sediments is relatively low, particle size plays a major role in PAHs adsorption.
- sediment /
- polycyclic aromatic hydrocarbons (PAHs) /
- adsorption capacity /
- particle size /
- Yancheng tidal flat

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图 1 采样区位置图

Figure 1.

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图 2 盐城潮滩柱状样沉积物参数的垂向分布

Figure 2.

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图 3 沉积物中不同环数PAHs所占百分比

Figure 3.

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图 4 3种粒径颗粒对PAHs的吸附能力

Figure 4.

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图 5 3种粒径颗粒对低中高3种环数PAHs的吸附能力

Figure 5.

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图 6 Freundlich模型下沉积物对PAHs吸附和盐城潮滩沉积物实际吸附对比图

Figure 6.

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表 1 PAHs的比值法判断指标^{[1, 25-26]}

Table 1. The method of PAHs source identification using isomeric ratios^{[1, 25-26]}

特征分子比	石油燃烧	煤炭燃烧	草木燃烧	石油源
荧蒽/（荧蒽+芘）	0.4～0.5	＞0.5	＞0.5	＜0.4
苯并[a]蒽/（苯并[a]蒽+䓛）	＞0.35	＞0.35	＞0.35	＜0.2
茚并芘/（茚并芘+苯并苝）	0.2～0.5	＞0.5	＞0.5	＜0.2

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表 2 沉积物中PAHs分子比值

Table 2. Isomeric ratios of PAHs in sediments

特征分子比	范围	平均值	指示意义
荧蒽/（荧蒽+芘）	0.44～0.55	0.51	燃烧源
苯并[a]蒽/（苯并[a]蒽+䓛）	0.27～0.49	0.41	燃烧源
茚并芘/（茚并芘+苯并苝）	0.41～0.53	0.49	石油燃烧源

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表 3 PAHs组分在主成分上的因子载荷和累积方差

Table 3. The components load of PAHs （PC1） in sediment and the variance of PCA （PC2）

PAHs组分	PC1	PC2
萘	0.484	0.743
苊烯	0.798	0.435
苊	0.902	0.375
芴	0.905	0.105
菲	0.946	−0.053
蒽	0.955	−0.053
荧蒽	0.959	−0.227
芘	0.906	−0.301
苯并[a]蒽	0.986	−0.152
䓛	0.953	−0.278
苯并[b]荧蒽	0.957	−0.219
苯并[k]荧蒽	0.924	0.189
苯并[a]芘	0.983	−0.079
二苯并[a,h]蒽	0.946	0.104
茚并[1,2,3-cd]芘	0.969	−0.005
苯并[g,h,i]苝	0.967	−0.128
累积方差%	84.696	92.468

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表 4 Freundlich模型下盐城潮滩三种粒径物质颗粒吸附能力参数

Table 4. Freundlich sorption parameters of PAHs with different sediment sizes from the Yancheng tidal flat

PAHs组分	粒径/μm	K	n	R²
萘	0～31	8.09	1.22	0.96
	32～64	6.00	1.24	0.94
	＞64	5.80	1.25	0.97
苊烯	0～31	25.87	1.02	0.94
	32～64	20.46	1.02	0.97
	＞64	18.77	1.03	0.95
苊	0～31	27.07	1.00	0.96
	32～64	22.27	1.01	0.94
	＞64	17.27	1.02	0.95
芴	0～31	16.73	1.04	0.94
	32～64	14.41	1.05	0.97
	＞64	14.90	1.04	0.96
菲	0～31	22.38	1.07	0.95
	32～64	21.07	1.07	0.94
	＞64	16.91	1.10	0.96
蒽	0～31	29.12	1.07	0.96
	32～64	22.61	1.09	0.97
	＞64	23.94	1.06	0.96
荧蒽	0～31	26.29	1.06	0.94
	32～64	21.04	1.10	0.95
	＞64	24.32	1.09	0.96
芘	0～31	20.26	1.15	0.95
	32～64	19.47	1.15	0.95
	＞64	16.81	1.15	0.95
苯并[a]蒽	0～31	26.46	1.14	0.96
	32～64	18.96	1.14	0.94
	＞64	14.45	1.17	0.94
䓛	0～31	27.28	1.10	0.95
	32～64	21.23	1.08	0.97
	＞64	23.33	1.06	0.96
苯并[b]荧蒽	0～31	23.11	1.20	0.98
	32～64	19.42	1.21	0.96
	＞64	21.74	1.19	0.94
苯并[k]荧蒽	0～31	24.78	1.22	0.97
苯并[k]荧蒽	32～64	21.27	1.23	0.98
	＞64	18.23	1.24	0.98
苯并[a]芘	0～31	23.69	1.09	0.95
	32～64	16.57	1.08	0.96
	＞64	14.63	1.11	0.96
二苯并[a,h]蒽	0～31	38.33	1.08	0.96
	32～64	33.05	1.10	0.95
	＞64	28.15	1.09	0.95
茚并[1,2,3-cd]芘	0～31	18.01	1.34	0.94
	32～64	15.68	1.38	0.96
	＞64	16.12	1.37	0.96
苯并[g,h,i]苝	0～31	10.25	1.20	0.96
	32～64	9.50	1.20	0.95
	＞64	9.52	1.18	0.96

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潮滩环境沉积物吸附多环芳烃的粒径因素影响

1. 海岸与海岛开发教育部重点实验室，南京大学地理与海洋科学学院， 南京 210023 2. 海底科学重点实验室，自然资源部第二海洋研究所， 杭州 310012 3. 河口海岸学国家重点实验室，华东师范大学海洋科学学院，上海 200241

作者简介: 杨达（1991—），男，硕士，主要从事海洋海岸环境方面的研究。E-mail：849583923@qq.com

通讯作者: 高抒（1956—），教授，主要从事河口海洋沉积动力学和沉积地质学。E-mail：shugao@nju.edu.cn

Adsorption of PAHs by the sediments from the Yangcheng tidal flat: the influence of particle size

Corresponding author: GAO Shu, shugao@nju.edu.cn

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1.
海岸与海岛开发教育部重点实验室，南京大学地理与海洋科学学院，南京 210023

2.
海底科学重点实验室，自然资源部第二海洋研究所，杭州 310012

3.
河口海岸学国家重点实验室，华东师范大学海洋科学学院，上海 200241