Characterization and Analysis of Dissolved Organic Matter in Different Types of Natural Water in Wuhan by Three-Dimensional Fluorescence Spectra

Lu BAI; Xiong XU; Quan-zhen LIU; Yan-jun DU; Dong-hong WANG

doi:10.3964/j.issn.1000-0593(2022)05-1642-06

Journals >Spectroscopy and Spectral Analysis >Volume 42 >Issue 5 >Page 1642 > Article

Spectroscopy and Spectral Analysis
Vol. 42, Issue 5, 1642 (2022)

Characterization and Analysis of Dissolved Organic Matter in Different Types of Natural Water in Wuhan by Three-Dimensional Fluorescence Spectra

Lu BAI^{1; 2;}, Xiong XU^1;, Quan-zhen LIU^{1; 2;}, Yan-jun DU^{1; 2; 3;}, and Dong-hong WANG^{1; 2; *;}

Author Affiliations

1. Key Laboratory of Drinking Water Science and Technology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China

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DOI: 10.3964/j.issn.1000-0593(2022)05-1642-06 Cite this Article

Lu BAI, Xiong XU, Quan-zhen LIU, Yan-jun DU, Dong-hong WANG. Characterization and Analysis of Dissolved Organic Matter in Different Types of Natural Water in Wuhan by Three-Dimensional Fluorescence Spectra[J]. Spectroscopy and Spectral Analysis, 2022, 42(5): 1642 Copy Citation Text

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Fig. 1. 3-DEEM characteristic spectra of water samples in Wuhan

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Fig. 2. Nomalized fluorescence in tegral volume(a)and the proportion of each fluorescence region integral of water samples(b)

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编号	地点	水体类型	经度	纬度	pH	温度/ ℃	电导率/ (μs·cm^-1)	氧化还原电位/mV	TOC/ (mg·L^-1)	NP/ (mg·L^-1)
WH1	罗家路	河流	114.358 457	30.627 075	8.33	26.4	344	107.8	2.22
WH2	楚河	河流	114.342 496	30.565 726	8.34	28.1	451	135.6	4.67
WH3	东湖泵桥	河流	114.220 993	30.476 527	8.25	28.4	395	132.5	3.92	0.90
WH4	青菱河	河流	114.278 507	30.471 810	7.71	27.6	554	133.2	4.26	1.20
WH5	巡司河	河流	114.317 393	30.493 007	7.60	27.9	550	146.0	3.99
WH6	东湖	湖泊	114.378 548	30.549 925	8.78	29.5	421	129.5	3.91	1.16
WH7	南湖1	湖泊	114.352 346	30.499 002	9.41	32.4	441	109.7	6.53	1.23
WH8	南湖2	湖泊	114.384 141	30.479 411	9.75	32.2	428	96.3	6.45	1.23
WH9	琴断口1	水源水	114.196 299	30.585 394	8.64	28.9	348	120.4	2.53
WH10	琴断口2	雨水	114.198 814	30.582 627	8.65	32.4	538	132.2	5.22
WH11	自来水	自来水	114.138 364	30.628 182	7.60	24.5	567	146.0	2.54

Table 1. Basic water quality parameters of samples in Wuhan

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荧光参数	计算方法	指示参数
FI	Ex=370 nm时, Em在470 nm处和520 nm处的荧光强度的比值	FI<1.4时, DOM以陆源输入为主; FI>1.9时, DOM以内源输入为主^[12]
BIX	Ex=310 nm时, Em在380与430 nm处荧光强度的比值	BIX在0.6~0.8范围表示水体DOM生产力较低, 主要为陆源输入, BIX>1时表示DOM主要为藻类或细菌等自生来源(内源)且有机质为新近产生^[11]
HIX	Ex=254 nm时, Em在435~480和300~345 nm区间荧光峰值面积之比	HIX<3表示腐殖质化程度弱且有新近自身源, 数值越高表明腐殖化程度越高^[13]
β:α	Ex=310 nm时, Em在380与420~435 nm区间最大荧光强度的比值	β代表新近生成的DOM, α代表降解程度较高的DOM, β:α可反应新生DOM在整体DOM中的占比^[11]

Table 2. Description of fluorescence analysis methods and spectrum parameters

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采样点	WH1	WH2	WH3	WH4	WH5	WH6	WH7	WH8	WH9	WH10	WH11
荧光指数(FI)	1.50	1.73	1.66	1.84	2.17	1.41	1.63	1.76	1.57	1.56	1.03
腐殖化指标(HIX)	1.11	1.37	1.59	1.95	0.27	1.13	1.29	1.42	1.03	1.28	1.11
自生源指标(BIX)	0.93	0.86	0.91	0.94	0.88	0.94	0.92	0.88	0.99	0.86	0.96
新鲜度指数(β:α)	0.93	0.83	0.87	0.89	0.82	0.9	0.89	0.84	0.89	0.83	0.79

Table 3. Fluorescence index, Autochthonous index, the humification index and Freshness indexof DOM in water samples

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	TP	TOC	C1	C2	C3	C4	C5
TP	1	0.742	-0.153	-0.053	-0.102	0.740	0.739
TOC		1	0.210	0.305	0.262	0.992	0.988
C1			1	0.986	0.994	0.075	-0.090
C2				1	0.991	0.221	0.042
C3					1	0.164	-0.003
C4						1	0.950
C5							1

Table 4. Correlation analysis of water environmental quality, water quality parameters and fluorescence components

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采样时间	DOM的组成及占比/%						参考文献
采样时间	类酪氨酸	类色氨酸	陆源腐殖质	类腐殖酸	类富里酸	微生物代谢物类	参考文献
2007.09	22.1	37.2	31.2	9.5			[16]
2012.08	32.1~33.5	46.9~49.1	18.8~19.6				[19]
2011—2014	47.9	38.9			13.3		*
2020.06	20.8	22.2		26.3	21.4	9.3	本研究

Table 5. Temporal variation of DOM composition and proportion in East Lake

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