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Mitigation of phosphorus contamination from livestock farms with La-containing hydrochar adsorbent

文献类型： 外文期刊

作者： Wang, Jiarui 1 ; Wei, Xiaocheng 2 ; Shen, Yujun 3 ; Kong, Hao 4 ; Wang, Weihan 2 ; Smith Jr, Richard Lee 5 ; Guo, Haixin 2 ;

作者机构： 1.Chinese Acad Agr Sci, Inst Environm & Sustainable Dev Agr, Beijing 100081, Peoples R China

2.Minist Agr & Rural Affairs, Agroenvironm Protect Inst, 31 Fukang Rd, Tianjin 300191, Peoples R China

3.Acad Agr Planning & Engn, 41 Maizidian St, Beijing 100125, Peoples R China

4.Hong Kong Polytech Univ, Sichuan Univ, Inst Disaster Management & Reconstruct, 24 South Sect 1,1st Ring Rd, Chengdu 610065, Peoples R China

5.Tohoku Univ, Grad Sch Environm Studies, Aramaki Aza Aoba 468-1,Aoba Ku, Sendai 9808572, Japan

关键词： Farm waste recycle; Greenhouse gas abatement; Phosphate release; Wastewater treatment

期刊名称：SEPARATION AND PURIFICATION TECHNOLOGY （ 影响因子：9.0； 五年影响因子：8.5 ）

ISSN： 1383-5866

年卷期： 2025 年 359 卷

页码：

收录情况： SCI

摘要： Phosphorus releases from livestock and poultry farms cause environmental contamination that must be mitigated through robust and effective recycle technologies. Lanthanum-modified hydrochars (La-HCN) prepared via mechanochemical modification had 96.8 mg g- 1 phosphorus adsorption capacities and unprecedented fast uptake rates (half-maximum absorption capacity in 1.5 min). Presence of nitrogen in the hydrochars enhanced ion electrostatic interactions between lanthanum and carbon and accelerated phosphorus adsorption, which was confirmed theoretically with density functional theory calculations. Life cycle assessment (LCA) on a one-animal one-year basis revealed that production of La-containing hydrochar required fewer resources, had lower greenhouse gas emissions (171 kg CO2) and lower environmental impact than comparable adsorbent materials. Phosphorus removal levels achieved using the La-HCN adsorbent on actual wastewater from livestock and poultry breeding farms reached an adsorption rate of 93.6 %, exceeded sewage effluent standards of China, US EPA and EU, thus, demonstrate the practicality and scope of the developed technology.

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