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Temporal variation of heavy metals in sewage sludge in typical cities in Gansu Province, northwest China

文献类型： 外文期刊

作者： Yuan, Jinhua 1 ; E, Shengzhe 1 ; Che, Zongxian 1 ; Cao, Kun 3 ;

作者机构： 1.Gansu Acad Agr Sci, Inst Soil Fertilizer & Water Saving Agr, Lanzhou 730070, Peoples R China

2.Minist Agr, Gansu Sci Observing & Expt Stn Agroenvironm & Arab, Lanzhou 730070, Peoples R China

3.Qingyang Wozhong Agr Technol Corp Ltd, Qingyang 74500, Peoples R China

关键词： Monthly variation; Street dust; Municipal sludge; City type; Wastewater; Rainfall

期刊名称：ENVIRONMENTAL MONITORING AND ASSESSMENT （ 影响因子：3.0； 五年影响因子：3.1 ）

ISSN： 0167-6369

年卷期： 2023 年 195 卷 4 期

页码：

收录情况： SCI

摘要： To investigate the temporal behaviors of heavy metals in sewage sludge in typical cities of industrial, industrial-agricultural, agricultural, or energy focused. Samples were collected every 10 days for a period of 1 year in four types of cities of Lanzhou, Tianshui, Qingyang, and Zhangye. The average annual values for all four cities were Cd (1.59-3.16 mg/kg), Pb (41.9-55.1 mg/kg), Cr (63.8-92.0 mg/kg), Cu (75.7-92.6 mg/kg), Zn (498-612 mg/kg), and Ni (3.66-4.25 mg/kg). The highest values were observed in June for Cd, Cr, and Zn, at Lanzhou and Tianshui. At Qingyang and Zhangye, the Cd, Cr, and Zn contents were stable throughout the year. There was a similar monthly change among the four cities regarding the levels of Ni content, and it was far below the background value. The monthly fluctuations in Cd, Pb, Cr, and Zn are mainly due to street dust effect. For cities with a developed industry, the impact of street dust during the first rains of the year on sewage sludge's heavy metal content must be highlighted as being of particular importance.

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