Results 1 to 10 of about 1,550 (105)
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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Gongye shui chuli, 2020 以市政污水为研究对象，应用曝气膜生物反应器（MABR）技术探讨同步硝化反硝化（SND）过程的构建及其在不同低碳氮比下运行的特点，为今后应用MABR处理低碳氮比废水提供有益参考。结果表明：曝气压力为0.049 MPa，HRT为12 h，碳氮比为6.3~8.0时，经过45 d的连续运行，成功实现了稳定的SND工艺，SND率达87.48%，且不存在亚硝酸型硝化；当碳氮比由4.4降至2.3时，平均SND率由87.34%降至84.53%；碳氮比降低对生物膜与主料液菌群多样性影响较小，对优势属种类影响较大。
张燕伟 +5 more
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Shuitu Baochi Xuebao, 2020 选择黄土高原森林带自东向西8个地区优势植物的土壤作为研究对象，探究不同经度下土壤养分和土壤微生物生物量生态化学计量特征。结果表明：土壤碳、氮和微生物生物量碳、氮、磷含量随经度整体呈现出先减少后增加的变化趋势，土壤微生物生物量碳氮磷与土壤碳氮之间存在耦合关系，对环境因子的响应具有-致性。土壤磷含量空间分布比较稳定。土壤碳氮比为8左右，土壤有机碳与全氮的空间分布具有-致性。土壤微生物生物量碳氮比为9左右，微生物生物量氮磷比为5左右，反映了土壤微生物生物量碳氮、氮磷的比值较稳定 ...
贾培龙 +5 more
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Gongye shui chuli, 2015 结合低碳氮比污水特点, 评述了以内源提供有机碳源实现反硝化, 以及利用自养菌脱氮的厌氧氨氧化和氢自养型反硝化等新型生物脱氮技术, 介绍了它们在低碳氮比废水处理中的反应机理、应用进展、优势以及需要解决的问题。该项研究为经济高效地处理低碳氮比污水提供了理论依据。
邓玮玮, 王晓昌
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Gongye shui chuli, 2014 在不同条件下对3种湿地植物枯落物进行水解，以获得相应的植物碳源。利用提取的植物碳源，研究了进水碳氮比对水平潜流人工湿地脱氮效果的影响。结果表明，对以硝态氮为氮源的反硝化过程，补充碳源对硝态氮和总氮的去除有明显的促进作用；对以氨氮和硝态氮为氮源的脱氮过程，随碳氮比的升高，硝态氮和总氮去除率增大，而氨氮由于受到溶解氧的制约，其去除率下降，并最终制约了总氮去除率的增大程度。
丁怡, 王玮, 王宇晖, 宋新山
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Rare Metals, Volume 45, Issue 8, August 2026.ABSTRACT The commercialization of lithium–sulfur batteries (Li–S batteries) has been hindered by the shuttle effect of lithium polysulfides (LiPSs) and sluggish redox kinetics. In this study, we constructed a three‐dimensional hollow conductive network host material for sulfur with synergistic enhancement effects.
Jie Yang +6 more
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Organ‐specific ozone and nitrogen legacies strengthen substrate control over litter decomposition
Functional Ecology, Volume 40, Issue 8, Page 2548-2559, August 2026.Read the free Plain Language Summary for this article on the Journal blog. Abstract Elevated tropospheric ozone (O3) and nitrogen (N) deposition are concurrent atmospheric changes that strongly influence terrestrial carbon cycling, yet their combined effects on below‐ground decomposition remain poorly understood.
Xiaofan Hou +8 more
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Functional Ecology, Volume 40, Issue 8, Page 2590-2601, August 2026.Read the free Plain Language Summary for this article on the Journal blog. Abstract Permafrost thaw is reshaping nutrient dynamics in boreal forests, but its impacts on tree nutrient limitation and functional strategies remain poorly understood. Clarifying these responses is crucial for predicting the response of boreal forests to climate change.
Qiyue Fu +9 more
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Wafer‐Scale Amorphous g‐C3N4 With Broadly Tunable Dielectric Properties for 2D Electronics
Rare Metals, Volume 45, Issue 7, July 2026.ABSTRACT Two‐dimensional (2D) semiconductors are regarded as promising candidates for next‐generation electronics due to their superior electrostatic control; however, their performance is severely constrained by the lack of suitable dielectric materials.
Binyin Gao +13 more
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Shuitu Baochi Xuebao, 2021 为探究西辽河平原浅埋滴灌条件下优化施氮对春玉米农田生态系统碳氮足迹的影响，于2019—2020年在内蒙古通辽市科尔沁区农业高新科技示范园区连续2年进行定位试验，以传统漫灌常规常量追氮为对照（CK），设置浅埋滴灌下常量追氮（T1）和优化追氮（T2：70%常量追氮）2个处理，研究不同灌溉方式和氮肥管理对春玉米产量、农田经济效益和农田碳氮足迹的影响。结果表明，相比于传统漫灌，浅埋滴灌下T1和T2处理在增加玉米产量的同时提高农田经济效益 ...
邰继承 +4 more
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