The Potential of Biochar as N Carrier to Recover N from Wastewater for Reuse in Planting Soil: Adsorption Capacity and Bioavailability Analysis
文献类型： 外文期刊
作者： Yu, Yingliang 1 ; Yang, Bei 1 ; Petropoulos, Evangelos 2 ; Duan, Jingjing 1 ; Yang, Linzhang 1 ; Xue, Lihong 1 ;
作者机构： 1.Jiangsu Acad Agr Sci, Inst Agr Resources & Environm, Key Lab Agr Environm Lower Reaches Yangtze River, Nanjing 210014, Peoples R China
2.Newcastle Univ, Sch Engn, Newcastle Upon Tyne NE1 7RU, England
关键词： biochar; nitrogen carrier; adsorption; bioavailability; agricultural wastewater
期刊名称：SEPARATIONS （ 影响因子：2.6； 五年影响因子：2.7 ）
ISSN：
年卷期： 2022 年 9 卷 11 期
页码：
收录情况： SCI
摘要： Recovering nitrogen (N) from agricultural wastewater for reuse in planting fields is a more sustainable and economical strategy to limit N pollution than using conventional treatments. Hereby, regular biochar produced by wheat straw pyrolysis and Mg-modified biochar were used as the N carriers to assess inorganic-N adsorption from simulated agricultural wastewater and the potential for reuse of the carried N in a planting system. The results showed that biochar materials have different affinities towards inorganic-N types. The amount of biochar carried-N increased with the increase in inorganic-N concentration and reached 4.44 mg/g as the maximum. The biochar carried similar to 4 mg/g of inorganic N substituting nearly 40% of N fertilizer following a 1% w/w addition rate for vegetable planting. After a trial season, 34.7-42.7% of the carried N from biochar was assimilated by the plant, 45.9-53.7% was retained by the soil, and only about 10% was lost. In comparison to the condition with all N inputs from chemical fertilizer, the addition of part of N by the N-biochar matrix significantly reduced the N loss by improving the plant N uptake or increasing the N content in the soil. This study demonstrates that biochar materials could be used as N carriers to recover N from wastewater for reuse in soil, carrier stability, and bioavailability preservation.
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