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Sewage sludge-derived hydrochar that inhibits ammonia volatilization, improves soil nitrogen retention and rice nitrogen utilization

文献类型： 外文期刊

作者： Chu, Qingnan 1 ; Xue, Lihong 1 ; Singh, Bhupinder Pal 6 ; Yu, Shan 1 ; Mueller, Karin 8 ; Wang, Hailong 9 ; Feng, Yanf 1 ;

作者机构： 1.Jiangsu Acad Agr Sci, Inst Agr Resources & Environm, Minist Agr & Rural Affairs, Key Lab Agroenvironm Downstream Yangtze Plain, Nanjing 210014, Peoples R China

2.Nottingham Trent Univ, Sch Anim Rural & Environm Sci, Ctr Integrated Water Energy Food Studies, Brackenhurst Campus, Southwell NG25 0QF, Notts, England

3.Chinese Acad Agr Sci, Tobacco Res Inst, Minist Agr, Key Lab Tobacco Biol & Proc, Qingdao 266101, Peoples R China

4.Univ Massachusetts, Stockbridge Sch Agr, Amherst, MA 01003 USA

5.Jiangsu Univ, Sch Environm & Safety Engn, Zhenjiang 212001, Jiangsu, Peoples R China

6.NSW Dept Primary Ind, Elizabeth Macarthur Agr Inst, Menangle, NSW 2568, Australia

7.Univ Newcastle, Sch Environm & Life Sci, Fac Sci, Callaghan, NSW 2308, Australia

8.New Zealand Inst Plant & Food Res Ltd, Ruakura Res Ctr, Private Bag 3123, Hamilton, New Zealand

9.Foshan Univ, Sch Environm & Chem Engn, Biochar Engn Technol Res Ctr Guangdong Prov, Foshan 528000, Guangdong, Peoples R China

10.Zhejiang A&F Univ, Key Lab Soil Contaminat Bioremediat Zhejiang Prov, Hangzhou 311300, Zhejiang, Peoples R China

关键词： Ammonia volatilization; Soil column experiment; Functional group; Hydrothermal carbonization; Nitrogen use efficiency; Paddy soil

期刊名称：CHEMOSPHERE （ 影响因子：7.086； 五年影响因子：6.956 ）

ISSN： 0045-6535

年卷期： 2020 年 245 卷

页码：

收录情况： SCI

摘要： Hydrothermal carbonization (HTC) is a promising technique for treating sewage sludge. In this study, three sewage sludge-derived hydrochars produced with water (SSHW), 1 wt% magnesium citrate (SSHM) solution, and 1 wt% magnesium citrate mixed with 1 wt% sulfuric acid (SSHMS) solution were applied to columns of packed paddy soil. We evaluated the effects of these differently modified sewage sludge-hydrochars on ammonia volatilization, soil nitrogen (N) retention and rice growth. Results showed that compared to the control, SSHMS reduced the cumulative ammonia volatilization determined after three split application of N-fertilizer. SSHM and SSHMS both reduced the yield-scale ammonia volatilization by 20.3% and 41.2% respectively. Moreover, the addition of three sewage sludge-derived hydrochars increased soil ammonium-N retention after the first supplementary fertilization; however, after the second supplementary fertilization, only SSHMS addition significantly increased soil ammonium-N retention. Of the three hydrochars tested, SSHMS has the strongest effects on soil ammonium-N retention and inhibition of ammonium-N loss in floodwater. This was attributed to increased ammonium sorption driven by SSHMS's lower surface pH and porous diameter, larger adsorption porous volume and higher abundance of carboxyl functional groups. Additionally, the increased soil N retention increased grain N content and yield. Our results provide a novel method to valorize sewage sludge into a valuable fertilizer that if applied to paddy soil it can inhibit ammonia volatilization, N loss in floodwater, and promote N use efficiency by rice, with positive implications for sustainable rice production. (C) 2019 Elsevier Ltd. All rights reserved.

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