Journal of Textile Research ›› 2021, Vol. 42 ›› Issue (06): 26-34.doi: 10.13475/j.fzxb.20210205109

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• Academic Salon Column for New Insight of Textile Science and Technology: Mitigation Strategies and Sustainable Development of Fibrous Microplastics • Previous Articles     Next Articles

Occurrence and release of fibrous microplastic from dyeing and printing wastewater

XU Chenye1, GU Chunjie1, NI Yifan1, SHEN Chensi1, WANG Huaping2, WU Jing2, LI Fang1()   

  1. 1. School of Environmental Science and Engineering, Donghua University, Shanghai 201620, China
    2. School of Materials Science and Engineering, Donghua University, Shanghai 201620, China
  • Received:2021-02-22 Revised:2021-03-14 Online:2021-06-15 Published:2021-06-25
  • Contact: LI Fang E-mail:lifang@dhu.edu.cn

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Abstract:

Fibrous microplastic (MP)derived from textile printing and dyeing industry are considered to be an important source of MPs in the aquatic environment. In order to understand the pollution emission characteristics and environmental behaviors of fibrous MP from the industry in the Yangtze River Delta, the regulation influent and end effluent samples from 22 textile printing and dyeing enterprises were collected to analyze the abundance, morphology, polymer types and removal efficiencies of fibrous MP. It was found that fibrous MP were occurred in all samples with average abundance of (7 504.8±5 685.9) and (1 272.7±782.2) n/L in influent and effluent samples, respectively. PET was the major polymer type, but no significant association was observed between raw materials and polymer compositions in wastewater. fibrous MP of sizes with 100-300 μm and with transparent color dominated the influent, but small-sized (<100 μm) and colored fibrous MP increased across the treatment systems, which was attributable to the fibers characterization and treatment pathways. Overall, the removal rates of fibrous MP were (78.3±10.2)%, removal efficiencies were positively correlated with sizes. Ecological risks assessment indicated that (3.88±5.75)×109 n/d fibrous MP from effluent were still released due to the huge daily capacity, which posed potential and lasting pressure on the aquatic environment. This findings from this research provide technical understanding on fibrous MP in wastewater effluents channel and their composition, and help optimize advanced treatment processes.

Key words: fibrous microplastics, textile and dyeing, effluent release, removal rate, risk assessment, dyeing and printing wastewater

CLC Number: 

  • TS102

Fig.1

Distribution of sampling sites"

Fig.2

Microfiber concentrations of influent (a) and effluent(b) in dyeing and printing wastewater at sampling points"

Tab.1

Microfiber/microplastics abundance of influent and effluent from dyeing and printing plants and wastewater treatment plants in different regions"

调查对象 目标污染物 丰度/(个·L-1) 去除率/% 参考文献
进水中 出水中
中国柯桥工业区
纺织印染企业 		纤维微塑料 A厂:12 300
B厂:54 100
C厂:2 100 		1 880
1 350
10 		84.7
97.5
99.5 		[13]
中国某纺织印染企业1 纤维微塑料 256.7 25 90.3 [20]
中国某纺织印染企业2 纤维微塑料 334.1 16.3 95.1 [21]
土耳其某城市污水处理厂 微塑料 Seyhan: 26.5±3.17 6.99±0.764 73 [22]
Yuregir: 23.4±4.10 4.11±0.318 79
加拿大温哥华城市污水处理厂 微塑料 31.1±6.7 0.5±0.2 99 [23]
英国格拉斯哥市镇污水处理厂 微塑料 15.7±5.23 0.25±0.04 98.41
初级:78.34;次级:20.1 		[14]
韩国市镇污水厂 微塑料 A2O: 29 850 0.435 > 98 [24]
SBR: 16 450 0.140
Media: 13 865 0.280
芬兰市镇污水厂 微塑料 MBR: 6.9 0.005 99.9 [25]
砂滤:0.7 0.02 97
气浮:2.0 0.1 95
芬兰Kenkaveronniemi
市镇污水厂 		纤维微塑料 52.6±11.3 0.3±0.1 99.4 [26]
微塑料 57.6±12.4 0.6±0.2 98.9

Tab.2

Kruskal-Wallis analysis on effects of residual amount of raw materials on polymer composition"

原材料 PET PP PE PA
化学纤维 78.1±33.9 12.5±26.7 3.12±8.84 6.25±11.6
棉 76.3±37.1 0.00±0.00 19.1±37.8 4.76±12.6
其他材料 77.1±37.3 8.57±15.7 7.14±18.9 7.14±18.9
Chi-square, p 0.005,0.995 0.880, 0.431 0.845,0.445 0.048,0.953

Fig.3

Polymer composition for microfibers (a) and fibrous MPs (b) in dyeing and printing wastewater at sampling points"

Fig.4

Size distribution of fibrous MPs fibers of influent(a), effluent(b) and combined results of 22 enterprises(c) in dyeing and primting wastewater"

Fig.5

Color composition of fibrous MPs of influent (a) and effluent (b) in dyeing and printing wastewater"

Fig.6

Different size distributions of transparent and colored fibers in influent"

Fig.7

Relations between fibrous MPs removal efficiencies and size distributions"

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