Results 101 to 110 of about 455,453 (240)

离子交换-还原沉淀耦合工艺处理含Cr(Ⅵ)废水试验研究

open access: yesGongye shui chuli, 2012
为了高效、低成本地处理含Cr(Ⅵ)废水,提出采用离子交换-还原沉淀耦合工艺处理该废水。结果表明,将质量浓度为100 mg/L的含Cr(Ⅵ)废水以20 mL/min连续10.5 h流经离子交换柱,Cr(Ⅵ)的吸附率高达99.9%;用5%NaOH溶液洗脱饱和的离子交换树脂,洗脱液含Cr(Ⅵ)高达6 918.7 mg/L。FeSO4.7H2O还原处理浓缩后的高浓度含Cr(Ⅵ)废水的最佳反应条件为pH≥7,反应时间30 min,搅拌速度100 r/min,FeSO4.7H2O投加量为理论投加量的1.2倍 ...
曾君丽, 邵友元, 易筱筠
doaj  

Magnetic proximity-enhanced Curie temperature of Cr-doped Bi2Se3 thin films

open access: yes, 2015
Beam time awarded on ID32 at the ESRF (Proposal No. HC-1282) and on I10 at the Diamond Light Source (Proposal No. SI-10207) are acknowledged. T.H. acknowledges the John Fell Oxford University Press (OUP) Research Fund. A.A.B.
van der Laan, G   +15 more
core   +1 more source

Diagnostic Use of Testing for Novel Murine Autoantibodies for Sjögren Disease in the Rheumatology Outpatient Setting

open access: yesArthritis Care &Research, EarlyView.
Objective The goal was to assess the diagnostic performance of three novel autoantibodies (NA) for Sjögren disease (SjD) by comparing NA prevalence in patients with SjD, other autoimmune rheumatic diseases (ARDs), nonspecific chronic sialadenitis (CS), and controls.
Chadwick R. Johr   +5 more
wiley   +1 more source

不同种类活性炭对mZVI/活性炭吸附还原Cr(Ⅵ)的影响

open access: yesGongye shui chuli
基于活性炭(AC)的良好吸附性能和其可与微米零价铁(mZVI)结合形成微电解体系的特性,采用球磨法(BM)合成多种mZVI/ACs复合材料,并探讨该类材料对Cr(Ⅵ)的去除效能,对最佳复合材料去除Cr(Ⅵ)的机理进行解析。研究结果表明,BM可使AC与mZVI有效结合,短时球磨条件下mZVI/AC(木质)对Cr(Ⅵ)的去除效果较优。溶液中的Cr(Ⅵ)主要由次生Fe2+还原,而AC不仅可加强mZVI/AC对Cr(Ⅵ)的吸附,而且还促进了mZVI的腐蚀,进而强化了对Cr(Ⅵ)的去除。通过监测Cr(Ⅵ ...
王文豪   +5 more
doaj  

低温低浊水中聚硫氯化铝应急处置Cr(Ⅵ)的实验

open access: yesGongye shui chuli, 2018
近年来,我国频发水环境突发污染事件,给生产生活造成巨大影响。在低温低浊条件下探究了不同混凝剂对Cr(Ⅵ)的去除效果,并以聚硫氯化铝(PACS)为混凝剂,考察pH、PACS投加量、PAM投加量、静置时间、Cr(Ⅵ)初始质量浓度对Cr(Ⅵ)去除效果的影响。结果显示,PACS的去除效果优于其他混凝剂,在pH为8、PACS投加量为200 mg/L、PAM投加量为6 mg/L、静置时间为30 min条件下,Cr(Ⅵ)去除率可达91.7%,PACS的混凝效果随Cr(Ⅵ)质量浓度的增大而下降。投加PACS可实现对Cr(
陈齐玮   +9 more
doaj  

赤泥/煤基铁炭材料的制备及其脱除废水Cr(Ⅵ)的性能

open access: yes, 2018
以脱钠赤泥、粉状褐煤为原料,羧甲基纤维素钠为黏结剂,采用碳热还原法制备了可替代商业铁炭微电解填料的廉价铁炭材料,用于去除废水中的Cr(Ⅵ)。考察了不同的制备参数(炭化温度、炭化时间、赤泥/煤质量比)和吸附条件(溶液pH、浓度),以提升Cr(Ⅵ)去除效果。结果表明质量比(赤泥/煤)为1/3、800℃炭化1h的赤泥/煤基铁炭材料,可达到最大Cr(Ⅵ)吸附量(4.03 mg·g~(-1))、最低铁溶出量(
许光文   +6 more
core  

Clinical Significance of Therapeutic Drug Level Monitoring for Mycophenolate in Patients With Extrarenal Systemic Lupus Erythematosus—A Systematic Review and Meta‐Analysis

open access: yesArthritis Care &Research, EarlyView.
Objective Clinical response to mycophenolic acid (MPA) is highly heterogeneous; thus, therapeutic drug level monitoring (TDM) may help improve treatment efficacy. This systematic review and meta‐analysis examined therapeutic ranges for MPA levels associated with better outcomes and safety in patients with systemic lupus erythematosus (SLE ...
Zahraa Qamhieh   +5 more
wiley   +1 more source

Adsorption Characteristics of Cr(Ⅵ) and Cu2+ by Polyaniline-Modified Active Boron Nitride

open access: yes能源环境保护
Heavy metal pollution in wastewater poses a significant threat to the ecological environment of surface water and represents a major environmental challenge.
Bo LIU   +4 more
doaj   +1 more source

Cumulative Social Disadvantage and Disease Activity in Juvenile Idiopathic Arthritis: A Childhood Arthritis and Rheumatology Research Alliance Registry Study

open access: yesArthritis Care &Research, EarlyView.
Objective Social determinants of health (SDOH) contribute to juvenile idiopathic arthritis (JIA) disparities, but most studies have assessed SDOH independently rather than cumulatively across individual, family, and neighborhood levels. Using a socioecological framework, we investigated the relationship among cumulative social disadvantage ...
William Daniel Soulsby   +448 more
wiley   +1 more source

Fluorescence Quenching Method for the Determination of Trace Chromium(Ⅵ)

open access: yes, 1999
[中文文摘]本文研究了用荧光猝灭法测定痕量六价铬。本方法是基于六价铬与碘化钾反应生成了单质碘,碘可以使2’,7’-二氯荧光素(DCF)发生荧光猝灭,从而间接测定六价铬。六价铬浓度在0.20-2.50μAg/25ml范围内,荧光强度差值与六价铬浓度呈线性关系,线性回归方程△F=12.12C+0.19,相关系数γ=0.9993,检测限为0.1μg/25mL。本法简便、灵敏度高,已用于合成样中六价铬的测定,回收率在100~103%,结果令人满意。[英文文摘]A simple and sensitive ...
林清赞   +3 more
core  

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