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中国农学通报

中国农学通报 ›› 2024, Vol. 40 ›› Issue (31): 78-82.doi: 10.11924/j.issn.1000-6850.casb2024-0005

• 资源·环境·生态·土壤·气象 • 上一篇    下一篇

不同地区辣椒秸秆生物炭中磷溶出性能研究

张莉1(), 张坤2, 车迅1, 孙蕊1, 熊斌强1, 杨兴奎1, 王耀锋1()   

  1. 1 新疆农业大学资源与环境学院/新疆土壤与植物生态过程重点实验室，乌鲁木齐 830052
    2 新疆大学生态与环境学院，乌鲁木齐 830017
  • 收稿日期:2023-12-26 修回日期:2024-07-10 出版日期:2024-11-05 发布日期:2024-11-04
  • 通讯作者:
    王耀锋，男，1987年出生，陕西扶风人，讲师，博士，研究方向：主要从事农业废弃物资源化、生物炭中元素的生物地球化学循环、土壤污染调查与阻控技术研究。通信地址：830000 新疆维吾尔自治区乌鲁木齐市沙依巴克区八一街道 新疆农业大学农大东路311号，E-mail：。
  • 作者简介:

    张莉，女，2001年出生，河南周口人，本科在读，研究方向：主要从事废弃物生物炭的应用研究。通信地址：830000 新疆维吾尔自治区乌鲁木齐市沙依巴克区八一街道 新疆农业大学农大东路311号，E-mail：。

  • 基金资助:
    新疆维吾尔自治区自然科学基金青年基金项目“有机肥配施生物炭对土壤磷素有效性的影响机制研究”(2022D01B93); 新疆维吾尔自治区自然科学基金面上项目“酸性生物炭的分子模型构建及其对盐渍土的改良研究”(2021D01C048); 新疆农业大学大学生创新项目“不同地区辣椒秸秆制备生物炭对磷酸盐吸附性能的研究”(s202310758010)

Study on Phosphorus Dissolution Performance of Pepper Straw Biochar in Different Regions

ZHANG Li1(), ZHANG Kun2, CHE Xun1, SUN Rui1, XIONG Binqiang1, YANG Xingkui1, WANG Yaofeng1()   

  1. 1 College of Resources and Environment, Xinjiang Agricultural University/Key Laboratory of Soil and Plant Ecological Process, Urumqi 830052
    2 College of Ecology and Environment, Xinjiang University, Urumqi 830017
  • Received:2023-12-26 Revised:2024-07-10 Published:2024-11-05 Online:2024-11-04

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摘要：

为探究不同地区辣椒秸秆生物炭中磷的溶出能力，收集了江西省南昌市新建区、贵州省毕节市赫章县、河南省周口市太康县、甘肃省定西市安定区等不同地区的辣椒秸秆，分别制备400、700℃的辣椒秸秆生物炭，关注生物炭中不同形态磷含量（蒸馏水提取的H2O-P、0.5 mol/L碳酸氢钠提取的NaHCO3-P、0.1 mol/L氢氧化钠提取的NaOH-P和1 mol/L盐酸提取的HCl-P），研究生物炭中磷的动力学溶出和初始pH对磷溶出影响。结果表明，4种形态磷中H2O-P含量最多，NaHCO3-P含量最少。贵州地区400℃生物炭中H2O-P含量最高，达7.89 mg/g；河南地区700℃生物炭中NaHCO3-P含量最低，仅为0.13 mg/g。炭化温度越高，生物炭中磷的溶出量越低，400℃下制备的贵州地区生物炭磷溶出能力最强，在10 min时溶出量最大，达1.58 mg/g。溶液初始pH越高，生物炭中磷的溶出量越低，400℃下制备的贵州地区生物炭磷溶出能力最强，在pH 2.0时，磷的溶出量最大，达3.21 mg/g。研究发现，不同形态生物炭的磷含量不同，水溶性磷(H2O-P)含量最高，且随着炭化温度的降低，其含量增加；炭化温度越高，pH越低，越有利于生物炭对磷的吸附，生物炭表面的局部酸性环境有利于磷养分的释放。

关键词: 辣椒秸秆生物炭, 磷形态, 磷溶出, 初始pH

Abstract:

To investigate the phosphorus leaching capacity of pepper straw biochar in different regions, biochar were prepared from pepper straw in different regions (Taikang County of Henan Province, Xinjian District of Nanchang City, Dingxi City of Gansu Province and Bijie City of Guizhou Province) using two pyrolysis temperatures (400℃ and 700℃). The concentrations of four phosphorus fractions (H2O-P, NaHCO3-P, NaOH-P and HCl-P) in the biochars were extracted by distilled water, 0.5 mol/L sodium bicarbonate, 0.1 mol/L sodium hydroxide and 1 mol/L hydrochloric acid, respectively. Additionally, the kinetic dissolution experiments of phosphorus from biochars and the effect of pH on phosphorous leaching were carried out in the study. The results indicated that the content of H2O-P was the highest among the four fractions of phosphorus in biochars and NaHCO3-P was the lowest. The content of H2O-P in the biochar prepared at 400℃ in Guizhou was the highest, reaching 7.89 mg/g. The content of NaHCO3-P in the biochar prepared at 700℃ in Henan was the lowest, which was only 0.13 mg/g. The higher the temperature of carbonization, the lower the concentration of phosphorus dissolution in biochar. The biochar prepared at 400℃ in Guizhou had the strongest phosphorus dissolution ability, and the maximum dissolution amount was 1.58 mg/g at 10 min. The higher the initial pH of the solution, the lower the leaching of phosphorus from the biochar. When the initial pH 2.0, the maximum phosphorus leaching rate was achieved, the dissolved concentration of the biochar prepared at 400℃ in Guizhou was 3.21 mg/g. Our finding would provide a reference for the use of biochar to improve soil nutrients by enhancing phosphorus availability.

Key words: pepper straw biochar, phosphorus fractions, phosphorus dissolution, initial pH