河流入海口潮间带某工业地块石油烃污染特征及迁移规律

张荣海; 陈余道; 韦壮绵; 谢湉; 李书迪; 欧丽

doi:10.12153/j.issn.1674-991X.20210449

河流入海口潮间带某工业地块石油烃污染特征及迁移规律

doi: 10.12153/j.issn.1674-991X.20210449

张荣海^{1, 2,},
陈余道^1, ,,
韦壮绵²,
谢湉^{2, 3},
李书迪²,
欧丽²

1.
桂林理工大学环境科学与工程学院
2.
广西博世科环保科技股份有限公司
3.
华南理工大学环境与能源学院

基金项目: 国家重点研发计划项目（2020YFC1807104）；广西重点研发计划项目（桂科AB18281002）

详细信息

作者简介:
张荣海（1985—），男，博士研究生，研究方向为土壤及地下水调查和修复，443749544@qq.com

通讯作者:
陈余道（1965—），男，教授，博士，研究方向为污染水文地质学，cyd0056@vip.sina.com

中图分类号: X53,X523
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- HTML全文浏览量: 181
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- 被引次数: 0
出版历程
- 收稿日期: 2021-08-23

Pollution characteristics and migration law of petroleum hydrocarbons in an industrial site in the intertidal zone of the river estuary

ZHANG Ronghai^{1, 2
,},
CHEN Yudao^{1
, ,},
WEI Zhuangmian²,
XIE Tian^{2, 3},
LI Shudi²,
OU Li²

1.
School of Environmental Science and Engineering, Guilin University of Technology
2.
Guangxi Bossco Environmental Protection Technology Co., Ltd.
3.
School of Environment and Energy, South China University of Technology

摘要

摘要:
以河流入海口潮间带某工业地块为研究对象，采集和分析土壤及地下水样品中的石油烃（TPH），探究TPH在潮间带工业地块土壤和地下水中的迁移规律及潮汐作用的影响。结果表明：地块沿江区域地下水位受潮汐作用影响波动明显，含水层渗透系数平均为1.40 m/d，且近江区域含水层渗透性较好；地块土壤TPH最大超标倍数为1.39倍，污染主要分布于核心生产区，主要赋存于第一个2个不同岩性层间的交界处附近，地层结构和潮汐效应对土壤TPH垂向分布作用明显，当水位下降时TPH向下迁移，部分残留在包气带中，水位上升则导致相反的过程；地块地下水TPH最大超标倍数为95.23倍，污染羽中心与土壤TPH污染主要区域一致，地下水流场对污染物迁移分布影响显著；潮汐效应使得TPH污染羽的范围扩大，地下水水位波动和无长期稳定流向使得TPH在土壤和地下水之间发生数次的重新分配，导致其迁移规律不明显。本研究在一定程度上揭示了潮汐效应引起的潮间带地下水位长期波动对污染物在土壤和地下水中的迁移规律产生的显著影响，可为类似污染地块的有效管控和修复治理提供科学指导。
- 河流入海口潮间带 /
- 土壤 /
- 地下水 /
- 潮汐效应 /
- 石油烃 /
- 迁移规律
Abstract:
Taking an industrial site in the intertidal zone of the river estuary as the research object, the total petroleum hydrocarbons (TPHs) of soil and groundwater samples were collected and investigated, and the migration law of TPHs in the soil and groundwater of the industrial site in the intertidal zone and the influence of tide on it were analyzed and discussed. The results showed that the groundwater level in the area along the river of the site fluctuated obviously by tide, the average permeability coefficient of the aquifer was 1.40 m/d, and the permeability of aquifer near the river was better. The maximum exceeding multiple of TPHs in the soil of the site was 1.39 times. The pollution was mainly distributed in the core production area, mainly neared the junction between the first two different lithological layers. The vertical distribution of TPHs in soil was significantly influenced by stratum structure and tidal effect. When the water level decreased, TPHs migrated downward and part of TPHs remained in vadose zone, while when the water level rose, it led to the opposite process. The maximum exceeding multiple of TPHs in the groundwater of the site was 95.23 times, the pollution plume center was consistent with the main areas of soil TPHs pollution, and the groundwater flow field had a significant impact on the migration and distribution of pollutants. The tidal effect expanded the range of TPH pollution plume. The fluctuation of groundwater level with no long-term stable flow direction made TPHs redistribute countless times between soil and groundwater, so that its migration law was not obvious. This study revealed to a certain extent that the long-term fluctuation of the intertidal groundwater level caused by the tidal effect had a significant impact on the migration law of pollutants in the soil and groundwater, which could provide a scientific guidance for the effective control and restoration of similar contaminated sites
- river estuary intertidal zone /
- soil /
- groundwater /
- tidal effect /
- petroleum hydrocarbons /
- migration law

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图 1 采样点位布设

Figure 1. Distribution of sampling points

下载: 全尺寸图片幻灯片

图 2 潮汐水位及监测井水位变化

Figure 2. Tidal water level and monitoring well water level fluctuation

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图 3 土壤pH、含水率和TPH浓度地层分布

Figure 3. Stratigraphic distribution of pH, water content and TPH concentration in the soil

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图 4 土壤TPH浓度空间分布

Figure 4. Spatial distribution of TPH content in the soil

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图 5 石油烃在不同土壤剖面中的垂直分布

Figure 5. Vertical distribution of TPHs in different soil profiles

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图 6 地下水TPH浓度水平分布

Figure 6. Horizontal distribution of TPHs concentration in the groundwater

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表 1 水文监测点信息

Table 1. Information of hydrological monitoring points

监测点	与江岸距离（x）/m	平面位置	监测含水层	监测时间
Z38	185	五金集中厂内东北角	淤泥质夹薄层粉砂层	05:00—08:00， 11:00—13:00， 18:00—23:00
Z23	350	五金集中厂内西南角
Z21	410	研究区内（未属生产区）
Z3	610	皮革集中厂区内
潮汐水位		某江的江堤边

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表 2 监测井含水层参数计算结果

Table 2. Results of aquifer parameter of monitoring wells

监测井编号	x/m	H_x/m	H₀/m	t₀/min	a/(m²/min)	含水层厚/m	μ_e	K/(m/d)
Z38	185	0.62	2.12	759	93.72	6.6	0.000 1	2.04
Z23	350	0.46			60.68	6.4		1.36
Z21	410	0.45			58.97	6.3		1.34
Z3	610	0.22			27.60	4.6		0.87

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