Results 1 to 10 of about 2,917 (119)
Gongye shui chuli, 2023 作为低碳节能的生物脱氮工艺，厌氧氨氧化引进国内已有十余年的历史，已有多家食品加工龙头企业从国外引进了十多套厌氧氨氧化脱氮系统。这些系统大部分运行良好，但也有少数脱氮效果不稳定，未能达到预期效果。以典型食品加工废水厌氧氨氧化处理系统为例，分析确定了该脱氮系统失效原因在于进水氨氮低于系统设计要求，难以形成稳定的亚硝氮积累，破坏了一体式部分亚硝化-厌氧氨氧化（PN-A）系统的稳定高效脱氮，导致系统出水总氮去除率下降，同时出水硝氮明显升高。为解决此难题，采用高效亚硝化反应器促进食品加工废水快速稳定亚硝化 ...
汪敏泉 +3 more
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Gongye shui chuli, 2020 在21~25℃的条件下，接种稳定的亚硝化污泥至2个完全相同的膜生物反应器（MBR）中，考察纳米氧化铜对自养脱氮工艺脱氮性能的促进作用。结果表明，纳米氧化铜可有效提升自养脱氮性能，并可将亚硝化污泥诱导转变为全程自养脱氮污泥，使得好氧氨氧化菌、厌氧氨氧化菌及内源反硝化菌在该系统中共存。5 mg/L的纳米氧化铜可进一步提升总氮去除率至90%以上，停止添加后仍保持稳定运行。纳米氧化铜的加入一方面释放铜离子促进了酶的合成；另一方面阻碍氧传递形成厌氧微环境、并相互聚集提供载体，进而诱导并促进厌氧氨氧化菌的生长。
张肖静 +6 more
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Gongye shui chuli, 2022 厌氧氨氧化是近20 a来逐步发展起来的一种高效、节能新型生物脱氮工艺，其无需消耗碳源且污泥产量低，是处理低碳氮比氨氮废水的较佳选择。对厌氧氨氧化工艺的基本原理、影响厌氧氨氧化细菌活性的常见因素作了简要介绍，阐述了厌氧氨氧化工艺用于污水处理的发展历程，引用部分案例对厌氧氨氧化工艺在低碳氮比废水处理中的应用状况进行了说明，指出其对于低碳氮比高浓度氨氮废水处理效果较好，但对于低碳氮比的中低浓度氨氮废水的处理存在技术瓶颈，即中低浓度氨氮废水难以实现稳定的亚硝化 ...
汪晓军, 陈永兴, 陈振国
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Functional Ecology, Volume 40, Issue 7, Page 2128-2142, July 2026.Read the free Plain Language Summary for this article on the Journal blog. Abstract Soil organic nitrogen (SON) transformation is critical for global nutrient cycling and ecosystem productivity, yet how its responsiveness to climate change differs across diverse land use types remains poorly resolved.
Xinyi Yang +10 more
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Gongye shui chuli, 2023 污废水的高效节能脱氮技术一直以来都是研究和应用的焦点。短程反硝化-厌氧氨氧化耦合工艺因具有能耗低、产泥少、温室气体减排和脱氮效果好等优点，已成为废水脱氮领域研究和应用的热点。其中，短程反硝化被认为是厌氧氨氧化菌获取底物（NO2--N）的重要途径之一，对其进行研究具有重要的科学和工程意义。基于此，综述了短程反硝化的工艺原理，总结了硫自养短程反硝化和异养短程反硝化微生物的富集方法，并探讨了短程反硝化-厌氧氨氧化耦合工艺处理城市污水、高浓度氨氮废水和硝酸盐废水的工程应用 ...
李芸, 熊星星, 崔楠, 黄志远
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Atomically Thin Sn:GaN‐GaN Homojunction for High‐Sensitivity β‐Ray Detection
Rare Metals, Volume 45, Issue 6, June 2026.ABSTRACT Gallium nitride (GaN), a third‐generation wide‐bandgap semiconductor renowned for its superior radiation tolerance, holds promise for advanced β‐ray detection. Herein, a scalable liquid metal‐assisted in situ synthesis method is presented to fabricate Sn‐doped GaN homojunctions via gallium oxide printing followed by ammonolysis, enabling ...
Weiqing Liu +8 more
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Emerging MBenes for Energy Technologies
Rare Metals, Volume 45, Issue 6, June 2026.ABSTRACT The escalating global demand for sustainable energy is driving the search for transformative materials that transcend the limitations of conventional systems. Two‐dimensional (2D) transition metal borides (MBenes) have recently emerged as a compelling class, distinguished by unique electronic structures, tunable surface chemistry, and ...
Yingrui Ding +5 more
wiley +1 more source
Rare Metals, Volume 45, Issue 5, May 2026.ABSTRACT Composite materials hold significant potential for abrasive sealing, yet composite materials used for abrasive sealing fall short in service durability under extreme environments. Here, a controllable strategy for adjusting pore structure is proposed, aiming to design a YSZ(ESP)/BN@ZrO2‐polyester coating with hybrid micron/nanometer ...
Shuang Yu +8 more
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Rare Metals, Volume 45, Issue 5, May 2026.ABSTRACT Atomically dispersed iron–nitrogen–carbon (Fe‐N‐C) catalysts have emerged as promising alternatives for oxygen reduction reaction (ORR) owing to their highly atomic utilization. However, maintaining both Fe atomic dispersion and dense Fe‐Nx sites (typically below 2 wt%) in Fe‐N‐C catalysts is still a key challenge.
Lijuan Wang +6 more
wiley +1 more source
Zhongguo shiyan zhenduanxue, 2000 目的 通过８７例鼻咽癌患者血清一氧化氮浓度的观察，研究内源性一氧化氮水平的变化与鼻咽癌病理过程的关 系及其临床意义，探讨一氧化氮在肿瘤免疫方面的作用。方法 采用硝酸还酶法，通过检测血清中ＮＯ－３与ＮＯ－２浓度的总和反 映体内一氧化氮水平。结果鼻咽癌病人血清一氧化氮含量显著高于健康人，前者ｘ±ｓ为１０２．３±７．５，后者仅为７１４± １８．２μ ｍｏｌ／Ｌ（Ｐ＜０．０１）。对４０例鼻咽癌患者同时检测血清一氧化氮和ＥＢ病毒ＶＣＡ—ＩｇＡ抗体结果发现，一氧化氮浓度与 ＶＣＡ抗体的阳性滴度呈正相关 ...
蔡桦 +5 more
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