Hydrothermal treatment of pig manure for the catalytic production of nitrogen-phosphorus-potassium (NPK)-rich artificial humic acid and full utilisation of residue adsorption

被引：1

作者：

Qi, Jiamin ^{[1
,2
,5
]}

Yin, Shunyu ^{[2
,5
]}

Bian, Haohao ^{[2
,5
]}

Fan, Xing ^{[5
,7
]}

Huang, Junhao ^{[2
,5
]}

Yang, Bo ^{[2
,5
]}

Zhu, Hengxi ^{[1
]}

Kong, Dehui ^{[2
,5
]}

Zhang, Yi ^{[3
]}

Yang, Chao ^{[3
]}

Li, Yizhao ^{[4
]}

Zhou, Zhenxing ^{[3
,5
]}

Liu, Zewei ^{[1
]}

Zhang, Jin ^{[1
]}

Su, Xintai ^{[2
,5
]}

Li, Bin ^{[1
,6
]}

机构：

[1] Kunming Univ Sci & Technol, Fac Environm Sci & Engn, Kunming 650500, Peoples R China

[2] South China Univ Technol, Sch Environm & Energy, Key Lab Pollut Control & Ecosyst Restorat Ind Clus, Minist Educ, Guangzhou 510006, Guangdong, Peoples R China

[3] Xinjiang Univ, Coll Chem Engn, Urumqi 830000, Xinjiang, Peoples R China

[4] Univ Elect Sci & Technol China, Yangtze Delta Reg Inst Huzhou, Huzhou 313001, Peoples R China

[5] Guangdong Prov Key Lab Solid Wastes Pollut Control, Solid Wastes Pollut Control & Recycling, Guangzhou 510006, Guangdong, Peoples R China

[6] Kunming Univ Sci & Technol, Low Carbon Technol Res Ctr, Kunming 650500, Peoples R China

[7] Yunnan Normal Univ, Fac Energy & Environm Sci, Kunming 650500, Peoples R China

来源：

JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING | 2024年 / 12卷 / 06期

基金：

中国国家自然科学基金;

关键词：

Pig manure; Potassium humate; Hydrothermal process; Adsorbtion; Congo red; CONGO RED-DYE; HEXAVALENT CHROMIUM; ENHANCED ADSORPTION; EFFICIENT REMOVAL; EXTRACTION; GRAPHENE; SOIL; LIVESTOCK; WASTE; TRANSFORMATIONS;

D O I：

10.1016/j.jece.2024.114793

中图分类号：

X [环境科学、安全科学];

学科分类号：

08 ; 0830 ;

摘要：

Pig manure (PM) poses notable environmental and economic challenges as a significant agricultural waste. This study explores the catalytic oxidation of PM to produce potassium humate (HAK) using copper oxide (CuO) as a catalyst under hydrothermal conditions. Optimal parameters were identified as 10 % KOH addition, 0.01 g CuO catalyst, a hydrothermal temperature of 150 degrees C, and a reaction time of 3 hours, achieving an HAK yield of 82.54 %. Characterization techniques confirmed PM's effectiveness as a precursor and clarified CuO's role in enhancing conversion by increasing oxygen-containing functional groups. Nutrient recovery experiments showed that the combined addition of CuO and KOH led to recovery rates for nitrogen (N), phosphorus (P), and potassium (K) exceeding 98 %. The CuO catalyst increased P content by converting it into stable forms suitable for slow-release fertilizers, while enhancing N functionality through processes like the Maillard reaction and transforming K into beneficial forms for soil fertility. Additionally, the residues from the HAK production process were modified for use as an adsorbent (400-PMR-10) in dye wastewater treatment, demonstrating over 90 % removal efficiency for Congo red dye, even after multiple cycles. In summary, this research offers a sustainable approach to valorizing PM, yielding high quantities of HAK while utilizing residues for environmental remediation, contributing to improved soil fertility and effective wastewater treatment, and providing significant environmental and agricultural benefits.

引用

页数：20