Results 31 to 40 of about 590 (141)

生物除铁除锰在钢铁废水回用处理中的应用

open access: yesGongye shui chuli, 2007
研究了锰砂过滤工艺在钢铁废水回用处理中除铁除锰的应用。在滤速5.0m/h、工作周期4d、反冲洗强度21 L/(m2.h)和反冲洗时间6 min的操作条件下, 经过自然生物培养成熟的锰砂滤层对钢铁回用废水中的总铁、锰的去除率达80%以上, 出水总铁和锰都达到再生水用作循环冷却用水的水质要求。同时成熟的锰砂滤料还具有一定的COD和氨氮去除能力。
徐竟成   +5 more
doaj   +2 more sources

锰尾渣改良对4种植物吸收锰的影响

open access: yesShuitu Baochi Xuebao, 2007
采用盆栽法研究锰尾渣改良对商陆(Phytolacca acinosa)、美洲商陆(Phytolacca americana)、繁穗苋(Amaranthus paniculatus)和酸模叶蓼(Polygonum lapathif olium)4种植物吸收锰的影响。将锰尾渣与土壤混合进行基质改良,有利于植物生长。基质含80%锰尾渣时,商陆、美洲商陆和繁穗苋3种植物生长正常,吸收锰多。商陆和美洲商陆2种植物对锰尾渣耐受性强,生物量大,植物提取锰多;繁穗苋对锰尾渣耐受性较强。在锰尾渣污染区进行植物修复时 ...
向言词   +5 more
doaj  

Etnografia é, etnografia não é

open access: yesIlha Revista de Antropologia, 2017
Usando uma noção de "digital" como uma de suas metáforas principais, uma versão do termo que se apoia na discussão de Kara Keeling sobre o "humanismo digital", este texto argumenta que há algo sobre as não-linearidades que definem a diferença da digitalidade que pode nos ajudar a pensar sobre recalibragens no próprio projeto etnográfico.
Araujo, F. N., Jackson, John L.
openaire   +2 more sources

A pobreza é coercitiva?

open access: yesNovos Estudos - CEBRAP, 2021
O objetivo deste artigo é argumentar que situações de privação material são inerentemente coercitivas. Para isso, avaliam-se teorias da justiça para as quais a pobreza não representaria uma forma de intervenção coercitiva em contextos de livre-mercado. Argumenta-se aqui que a pobreza precisa ser concebida como uma posição social subordinada e, portanto,
openaire   +3 more sources

Defect‐Regulated Electronic and Lattice Evolution in Na4VMn(PO4)3 Toward High‐Performance Sodium Storage

open access: yesRare Metals, Volume 45, Issue 5, May 2026.
ABSTRACT NASICON‐type Na4VMn(PO4)3 (NVMP) is a promising high‐capacity cathode for sodium‐ion batteries, yet its practical deployment is hindered by Mn3+‐driven lattice distortion, persistent oxygen vacancy defects, and sluggish Na+ transport, collectively resulting in accelerated performance degradation.
Deyi Zhang   +10 more
wiley   +1 more source

Pyrolysis‐Engineered Fe/Mn‐ZIF Catalysts: Balancing Activity, Selectivity, and Stability for the Oxygen Reduction Reaction

open access: yesRare Metals, Volume 45, Issue 4, April 2026.
ABSTRACT Metal oxide‐based catalysts for oxygen reduction reaction (ORR) have drawn great attention in recent years. However, it remains technically challenging for the precise regulation of the overall performance due to the trade‐off effect among the activity, selectivity, and stability of electrocatalysts. Herein, a balancing strategy to control the
Haoran Ma   +7 more
wiley   +1 more source

Colorimetric and Photothermal Hollow Nanocomposite Based on Silver‐Seeded Prussian Blue Analog for Dopamine Monitoring and Photothermal Sterilization

open access: yesRare Metals, Volume 45, Issue 3, March 2026.
ABSTRACT Multi‐element Prussian blue analog (PBA) nanocomposites have attracted wide attention for their superior characteristics to single‐functional nanomaterials in extensive applications of diagnosis and therapy. In this study, a novel hollow nanocomposite was designed and fabricated by embedding S2− and Ag nanoparticles into a NiCuMnFe (PBA).
Tao Ji   +7 more
wiley   +1 more source

氯接触氧化过滤去除原水中锰的试验研究

open access: yesGongye shui chuli, 2013
采用氯接触氧化过滤去除原水中的锰,通过试验研究了除锰滤料的成熟期、投氯量及原水pH对氯接触氧化过滤除锰效果的影响。结果表明,在过滤初期,当投氯量为进水锰浓度的3倍,且原水pH达到8.7时,该方法能迅速而有效地去除原水中的锰;当滤料成熟后,只需将原水pH保持在7.3以上,并按理论投氯量投氯(进水锰浓度的1.3倍),即可获得良好的除锰效果。滤料成熟期的长短与投氯量和原水pH有关,原水pH越高,投氯量越大,滤料成熟越快。当进水锰质量浓度为1 mg/L时,成熟期一般为1~15 d。
郦丹, 余健, 张浩江
doaj   +2 more sources

"É peixe ou não é?"

open access: yesRURIS (Campinas, Online), 2015
Este ensaio tem o objetivo de apresentar um fragmento da etnografia sobre o conhecimento naturalístico dos pescadores artesanais da Carrasqueira – pequeno povoado localizado na costa central portuguesa. O material etnográfico, produzido entre os anos de 2010 e 2011, expõe como os pescadores carrasqueiros denominam alguns dos seres que constituem a ...
openaire   +1 more source

Hybrid Probiotic Hydrogel With Curcumin‐Loaded MnO2 Nanoparticles Enhances Diabetic Wound Healing Through Multimodal Microenvironmental Regulation

open access: yesRare Metals, Volume 45, Issue 3, March 2026.
ABSTRACT Skin wound injuries are often accompanied by bacterial infections and severe inflammation. Especially, M1‐type macrophages at the wound site can trigger a cascade of inflammatory responses, mediating a vicious cycle of inflammation. Meanwhile, hypoxia further exacerbates vascular damage and constriction in the wound microenvironment, thereby ...
Xianfeng Wang   +6 more
wiley   +1 more source

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