摘要
为提高矿源水溶性腐植酸的提取率及产品品质,以云南褐煤及辣椒为试材,研究纳米氧化锌催化H_(2)O_(2)氧解褐煤生产水溶性腐植酸有机肥的影响因素及氧解产物水溶性腐植酸有机肥的生化活性。结果表明:纳米氧化锌催化氧解褐煤能显著提高水溶性腐植酸的提取率,对水溶性腐植酸提取率影响最大的因素是煤与氧化剂用量比,其次是氧化降解温度,氧化剂浓度影响最小;优化工艺为:氧化剂(H_(2)O_(2))与煤用量比0.55,催化剂用量为0.8%,降解温度45℃,降解时间180 min,H_(2)O_(2)浓度为20%,在此条件下水溶性腐植酸提取率达39.42%。理化性质研究显示:催化氧解产物中元素碳、元素氢含量降低,氧化钾含量增加,活性基团含量增加;生物活性研究显示催化氧解产物能够显著提高辣椒幼苗的株高及叶绿素含量。
In order to improve the extraction rate and product quality of mineral water-soluble humic acid,Yunnan brown coal is used as experimental materials to study the experimental conditions for the production of water-soluble humic acid organic fertilizer from brown coal by using nano zinc oxide to catalyze brown coal by H_(2)O_(2)oxygenation.And the pepper is used as experimental materials to the biochemical activity of oxylysis products.The results show that:the extraction rate of watersoluble humic acid can be significantly increased by nano zinc oxide catalytic oxidation of brown coal;the most influential factor on the extraction rate of water-soluble humic acid is the ratio of coal to oxidant amount,followed by the oxidation degradation temperature,and the oxidant concentration has the least influence.The optimized condition is:ratio of oxidant(H_(2)O_(2))to coal is 0.55,catalyst dosage is 0.8%,degradation temperature is 45℃,degradation time is 180 min and H_(2)O_(2)concentration is 20%.Under this condition,the yield is up to 39.42%.The physical and chemical properties show that the content of carbon and hydrogen will decrease,the content of potassium oxide and active group will increase.The biological activity research show that degradation product could significantly improve the height and SPAD content of peppers.
作者
张水花
李本鸿
段琼琼
ZHANG Shui-hua;LI Ben-hong;DUAN Qiong-qiong(Faculty of Chemistry and Environmental Science,Qujing Normal College,Qujing Yunnan 655011;Library,Qujing Normal College,Qujing Yunnan 655011)
出处
《中国土壤与肥料》
CAS
CSCD
北大核心
2021年第5期291-295,共5页
Soil and Fertilizer Sciences in China
基金
云南省科技厅研究基金项目(2017FD143)
2020年国家级大学生创业训练资助项目(202010684053)。
