Results 11 to 20 of about 26,601 (120)
, 2019 氮气是储量丰富且廉价易得的氮源,但无法被人类或动植物直接吸收利用,只有通过化学或生物方法将空气中游离的氮气转化为含氮化合物才能被人类应用于食品或其他工业生产中,因此氮气的固定及转化已经逐渐成为新的研究热点。而氨是一种非常重要的无机化工产品,其在农业、医药、储能等行业中有着重要的作用,且需求量随着社会日益发展和人口的不断增加而不断增加。首先简单介绍了现有的氮气固定合成氨方法及其作用机理,随后重点综述了氮气电化学合成氨催化剂的研究现状 ...
袁浩然, 邓丽芳, 钱鑫, 王鲁丰
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, 2007 生物质煤气废水是一种新出现的高浓度氨氮有机废水。作者采用化学沉淀法去除该废水中的氨氮，研究了不同沉淀剂、pH、温度和搅拌时间对氨氮去除效果的影响。结果表明，MgCl2＋Na3PO4·12H2O明显优于其他沉淀剂组合。当n（Mg^2＋）：n（NH4^＋）：n（PO4^3-）=1：1：1、pH10．0、温度30℃、搅拌时间30min时，废水中的氨氮质量浓度从处理前的222mg/L降到17mg／L，去除率为92.3％
吴创之 +4 more
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Rare Metals, Volume 45, Issue 1, January 2026.ABSTRACT The electrocatalytic reduction of nitrate (NO3ER) has emerged as a promising strategy for mitigating NO3− ${{\text{NO}}_{3}}^{-}$ pollution in wastewater while concurrently producing value‐added ammonia; however, its process is significantly hindered by the lack of highly efficient and low‐cost electrocatalysts. Herein, we proposed several non‐
Xue‐Shi Song +5 more
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Lithology modulates soil priming effect via resource limitations and bacterial community structure
Functional Ecology, Volume 40, Issue 1, Page 176-190, January 2026.Read the free Plain Language Summary for this article on the Journal blog. Abstract The soil priming effect (PE), triggered by root exudate inputs that stimulates microbial activity and drives significant soil carbon (C) losses in terrestrial ecosystems.
Xinyu Hou +4 more
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Functional Ecology, Volume 39, Issue 5, Page 1274-1287, May 2025.Read the free Plain Language Summary for this article on the Journal blog. Abstract Interactions between plants and soil microorganisms in the rhizosphere are vital for maintaining the nutrient cycle and stability of terrestrial ecosystems. Nitrogen, closely related to carbon (C) cycling and ecosystem productivity, undergoes transformation by soil ...
Ru Wang +9 more
wiley +1 more source
Shuitu Baochi Xuebao, 2007 对轮作及大豆、玉米、小麦长期连作白浆土中氮含量及有机态氮组分变化进行研究。结果表明，在不施肥情况下，小麦连作区土壤由全氮、碱解氮降幅最大，酸解总氮、氨基酸态氮和氨基糖态氮降幅最小。在施有机肥情况下，土壤全氮、碱解氮及酸解总氮则以小麦连作区增幅最小，玉米连作区增幅最大；氨基酸态氮和氨基糖态氮在轮作区增幅最大。其他组分氮在轮作与连作小区间变化无规律。
田秀平, 薛菁芳, 韩晓日
doaj +2 more sources
Pharmacology of drugs used in autoimmune dermatopathies in cats and dogs: A narrative review
Veterinary Dermatology, Volume 35, Issue 4, Page 453-476, August 2024.Immunosuppressive drugs are the mainstay of treatment for many feline and canine autoimmune skin diseases, either as monotherapy or in combination with other drugs. Treatment with these drugs is often lifelong and may have long‐term consequences on the affected animal's overall quality of life.
Heng L. Tham, Jennifer L. Davis
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, 2008 本发明涉及一种用于处理高浓度氨氮废水的氨氮脱除剂及处理方法，属污水处理技术领域。氨氮脱除剂为在设定水量的氨氮废水中按Mg2+∶NH4+∶PO43-＝1.4～1.6∶1∶1.4～1.6加入镁盐和磷酸盐反应生成的沉淀物然后在MAP分解室分解，最后分解产物经盐酸溶解，搅拌混匀成稀泥状制备而成。使用氨氮脱除剂的处理方法其特征在于：设定水量的氨氮废水先进入pH预调节沉淀池，然后进入MAP沉淀池，加入氨氮脱除剂搅拌反应后根据上清液氨氮浓度选择是否进入MAP再次沉淀池，废水最后进入除磷池除磷 ...
波, 肖贤明, 黄海明, 晏
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Gongye shui chuli, 2014 概括了氨氮废水的生物法、吹脱法、化学沉淀法、折点氯化法、膜分离法、离子交换法、氧化法等常用处理方法,并分析了其影响因素,介绍了氨氮废水处理技术的研究现状,根据实际工程要求,系统分析了各种氨氮废水处理方法存在的问题和发展趋势,为氨氮废水处理技术的应用提供参考.研究表明,在氨氮废水的预处理和深度处理阶段联合使用多种氨氮处理方法,能够得到较好的脱除效果.
刘莉峰 +5 more
doaj +2 more sources
, 2008 通过小型静态实验,研究了成熟复合垂直流人工湿地的基质在不同影响因素正交组合条件下氨氮的释放速率和变化。在控制温度T、pH值、溶氧(DO)及有机质(COD)的情况下,监测氨氮的释放速率。结果表明,氨氮的释放速率和变化受温度影响最大,一定范围内(15～35℃)温度越高,释放速率越大;溶氧对氨氮的释放无显著影响;基质本身含有丰富的有机质,因而较低COD浓度不构成氨氮释放的限制因素;湿地基质对pH值有很强的缓冲能力 ...
贺锋, 成水平, 廖晓数, 吴振斌
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