基于相平衡分配法的店埠河沉积物重金属质量基准研究

熊鸿斌; 汪中意

doi:10.12153/j.issn.1674-991X.20230569

基于相平衡分配法的店埠河沉积物重金属质量基准研究

doi: 10.12153/j.issn.1674-991X.20230569

合肥工业大学资源与环境工程学院

基金项目: 安徽省重大科技项目(08010302114)

详细信息

作者简介:
熊鸿斌（1963—），男，教授级高工，博士生导师，主要从事水污染防治技术、环境影响评价理论与方法研究，xhb6324@sina.com

中图分类号: X820
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出版历程
- 收稿日期: 2023-08-01
- 录用日期: 2023-11-03
- 修回日期: 2023-09-25

Application of equilibrium partitioning approach to derive sediment quality guideline (SQG) values for heavy metals in the Dianbu River

School of Resources and Environmental Engineering, Hefei University of Technology

摘要

摘要:
以店埠河为研究对象，采用校正后的相平衡分配法推导了店埠河沉积物中5种重金属（Cr、Cu、Zn、Cd、Pb）的沉积物质量基准（SQG）值，并分析了各金属结合相对不同重金属沉积物质量基准的贡献。结果表明：店埠河沉积物中Cr、Cu、Zn、Cd和Pb的沉积物质量基准值分别为318.80、122.24、1 326.99、7.88和31.43 mg/kg；各金属结合相对不同重金属的沉积物质量基准值的贡献存在差异，细颗粒物（粒径<63 μm）对店埠河5种重金属沉积物质量基准值的贡献率为24.49%~48.93%，其中对Cr、Zn和Cu的沉积物质量基准值的贡献最大。酸可挥发性硫化物对Cu、Zn、Cd和Pb的沉积物质量基准值的贡献率分别为2.11%、0.22%、50.13%和21.67%，主要决定着Cd的SQG。总有机碳和残渣态对这5种重金属SQG的贡献率较低，均不足3%。
- 店埠河 /
- 相平衡分配法 /
- 沉积物质量基准 /
- 重金属
Abstract:
The Dianbu River was taken as the study object, the normalized equilibrium partitioning approach was used to derive the sediment quality guideline (SQG) values of five heavy metals (Cr, Cu, Zn, Cd, Pb) in the sediments of the river, and the contribution of each metal binding phase to the SQG value for five different heavy metals was analyzed. The results showed that the SQG values of Cr, Cu, Zn, Cd, and Pb in the sediments of the Dianbu River were 318.80, 122.24, 1 326.99, 7.88 and 31.43 mg/kg, respectively. There were differences in the contribution of each metal binding phase to the SQG values of five heavy metals. The contribution rate of fine particulate material (particle size < 63 μm) to the SQG values of five heavy metals in the sediments of the Dianbu River was 24.49%-48.93%, and the contribution rate to the SQG values of Cr, Zn and Cu sediments were the largest. The contribution rate of acid volatile sulfide to the SQG values of Cu, Zn, Cd and Pb was 2.11%, 0.22%, 50.13% and 21.67%, respectively, which mainly determined the SQG value of Cd. Total organic carbon and residual state contributed less than 3% to the SQG values of these five heavy metals.
- Dianbu River /
- equilibrium partitioning approach /
- sediment quality guideline /
- heavy metal

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图 1 店埠河采样点分布

Figure 1. Sampling point map of the Dianbu River

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图 2 不同金属结合相对重金属沉积物质量基准值的贡献

Figure 2. The contribution of each metal binding phase to the SQG of five heavy metals

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表 1 店埠河重金属沉积物质量基准推导模型

Table 1. Derivation models of heavy metal SQG values in the Dianbu River

重金属	推导模型
Pb,Cu	S_QG=Kp×W_QC×(1+A%+B%)+$ \dfrac{1}{n} $×A_VS×lgKp/ΣlgKp×M+M_R(1−A%)
Zn,Cd	S_QG=Kp×W_QC×(1+A%)+$ \dfrac{1}{n} $×A_VS×lgKp/ΣlgKp×M+M_R(1−A%)
Cr	S_QG =Kp×W_QC×(1+A%)+M_R(1−A%)

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表 2 店埠河重金属相平衡分配系数

Table 2. Kp of heavy metals in the Dianbu River

重金属	M_R/（mg/kg）		C_S/（mg/kg）		C_IW/（μg/L）		K_p/(L/kg)	logK_p
重金属	取值范围	平均值	取值范围	平均值	取值范围	平均值	平均值	logK_p
Cr	32.08~64.95	54.01	2.40~27.18	10.48	0.10~0.88	0.65	16123.1	4.21
Cu	10.75~35.55	20.95	11.38~48.27	25.31	2.70~5.68	4.24	5969.3	3.78
Zn	21.84~175.45	77.61	14.25~2090.80	437.62	9.19~55.49	32.55	13444.6	4.13
Cd	0.01~0.08	0.03	0.29~2.10	0.78	0.04~0.65	0.39	2000	3.30
Pb	14.30~36.39	20.90	10.30~38.05	21.59	16.79~19.47	17.99	1200.1	3.08

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表 3 店埠河沉积物中各金属结合相的浓度

Table 3. Contents of metal binding phases in sediments of the Dianbu River

采样点	细颗粒物/%	TOC/%	AVS/(μmol/g)	M_R/(mg/kg)
采样点	细颗粒物/%	TOC/%	AVS/(μmol/g)	Cr	Cu	Zn	Cr	Pb
S1	95.89	2.23	0.58	32.08	10.75	21.84	0.0055	14.30
S2	96.67	2.69	0.46	44.84	14.62	142.13	0.0115	18.16
S3	92.56	3.67	0.23	62.59	21.93	175.45	0.0285	18.55
S4	97.87	2.98	0.16	40.35	14.58	82.00	0.0130	17.38
S5	98.12	4.12	0.78	57.36	17.51	54.01	0.0180	23.27
S6	97.33	1.97	0.89	64.95	24.49	72.56	0.0330	22.06
S7	97.34	2.67	1.47	64.70	25.74	63.43	0.0250	18.10
S8	96.23	2.55	0.67	54.32	35.55	101.02	0.0775	36.39
S9	96.76	2.19	0.55	58.22	20.42	67.74	0.0165	20.87
S10	94.67	1.78	0.49	50.04	18.08	47.82	0.0310	19.29
S11	97.38	2.78	0.82	58.33	20.37	53.99	0.0245	16.21
S12	98.11	2.54	0.24	60.34	27.30	49.38	0.0265	26.25
平均值	96.58	2.68	0.61	54.01	20.95	77.61	0.0259	20.90

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表 4 店埠河重金属的沉积物质量基准推导和标准化结果

Table 4. Derivation and standardization results of SQG values for heavy metals in the Dianbu River mg/kg　

校正项	Cr	Cu	Zn	Cd	Pb
K_p×W_QC值	161.23	59.69	672.23	2.00	12.00
细颗粒物校正值	155.72	57.65	649.24	1.93	11.59
TOC校正值	—	1.60	—	—	0.32
AVS校正值	—	2.58	2.87	3.95	6.81
残渣态校正值	1.85	0.72	2.65	—	0.71
SQG	318.80	122.24	1 326.99	7.88	31.43

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表 5 不同水体重金属的沉积物质量基准

Table 5. SQG values for heavy metals in different water bodies mg/kg　

水体	Cr	Cu	Pb	Zn	Cd	数据来源
店埠河	318.80	122.24	31.43	1 326.99	7.88	本研究
巢湖	78.53	56.95	362.93	74.68	23.90	文献[14]
太湖	—	55.3	20.6	201.5	6.42	文献[12]
辽河	—	52.8	18.9	177.7	5.42	文献[12]
鄱阳湖	—	59.93	76.13	109.32	3.50	文献[13]
湘江衡阳段（基于地表水Ⅰ类标准）	—	64.62	55.57	1 360.40	2.34	文献[11]
LEL	26	16	31	120	0.6	文献[22]
SEL	110	110	250	820	10	文献[22]
ERL	81	34	46.7	150	1.2	文献[22]
ERM	370	270	218	410	9.6	文献[22]
注：LEL表示最低效应水平；SEL表示严重效应水平；ERL表示效应范围低值；ERM表示效应范围中值。

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