Results 1 to 10 of about 1,627,540 (134)
Gongye shui chuli, 2022 饮用水氟化物超标对牙齿、骨骼、内脏等人体器官健康有重要影响，因此，除氟是饮用水处理技术的重要研究方向之一。目前常用的吸附、离子交换、化学沉淀、电絮凝、反渗透和纳滤等方法各自存在成本高、操作复杂等问题。电渗析除氟具有电流效率高（97%以上）的技术特性，是当前研究的热点之一。综述了电渗析除氟的基本概念、技术原理，系统阐明了初始氟化物浓度、电压和电流密度、进水流速、pH、温度、原水性质和浓度、电极溶液的成分和浓度，以及离子交换膜等因素对电渗析除氟效果的影响规律，并提出电流密度 ...
罗胜 +3 more
doaj +2 more sources
Gongye shui chuli, 2022 为解决含氟废水中氟离子浓度超标的问题，采用均匀沉淀法制备多孔球状活性氧化镁（PSAM），考察了影响PSAM除氟性能的制备因素，得到其最佳制备条件。通过静态吸附实验和除氟前后PSAM的SEM、BET、EDS、XRD等表征分析，探讨了PSAM的除氟机理和再生效果，分析了PSAM对实际含氟废水的处理效果。结果表明：在n〔CO（NH2）2〕∶n（MgCl2·6H2O）=4.5∶1，V（PEG400）∶V（溶剂）=3∶20，110 ℃反应2 h，450 ℃煅烧2 h的条件下制备的PSAM除氟性能最佳 ...
康宁 +7 more
doaj +2 more sources
Gongye shui chuli, 1996 研究了铝离子对阴离子交换树脂的脱氟影响?结果表明,在含氟水样中适量引入铝离子(氟摩尔数的1/6),阴离子交换树脂的脱氟容量因铝离子的引入成倍提高,如果适当调节水样的PH,脱氟效果更佳?在模拟天然含氟水样中,氟浓度15×10-6,2g阴离子交换树脂采用此法脱氟,出合格饮用水235mL?自来水厂可用此法脱氟,只需在含氟水样流过阴离子交换树脂前加入适量硫酸铝,不增设备,方法简单易行,具有一定应用价值?
杨铸, 傅文燕
doaj +2 more sources
Gongye shui chuli, 2016 选用高温焙烧、硫酸、硫酸镁改性天然沸石和膨润土,考察了3种改性方法对沸石和膨润土吸附氟离子性能的影响。实验结果表明,高温焙烧、硫酸改性和硫酸镁改性均提高了沸石和膨润土对氟离子的吸附能力。改性沸石对氟离子的吸附符合Langmuir等温吸附模型;硫酸改性、硫酸镁改性膨润土对氟离子的吸附可用Langmuir模型和Freundlich模型描述,高温焙烧改性膨润土对氟离子的吸附则符合Freundlich模型。
赵文生, 孙彦红, 赵万明
doaj +2 more sources
Gongye shui chuli, 2022 半导体生产过程中会产生大量含氟废水，传统双钙法除氟工艺对氟的去除程度有限，不能满足日益严格的废水排放标准。为满足出水低于1.5 mg/L的深度除氟要求，对化学沉淀-纳米材料吸附组合工艺深度处理半导体企业含氟废水进行了系统性研究。通过控制变量实验考察了不同初始pH、药剂量、氟浓度、上柱液pH、共存离子对除氟效果的影响，并进行中试扩大实验研究了吸附材料的再生条件以及稳定性能。结果表明，综合考虑出水氟离子浓度与药剂成本等因素，在调节反应初始pH为8.5，并投加自制铝盐为主的沉淀剂160 mg/L条件下 ...
卢永 +7 more
doaj +2 more sources
Rare Metals, Volume 45, Issue 7, July 2026.ABSTRACT This study developed a metal–modified fluoroethylene vinyl ether (FEVE) organic coating on 6061 aluminum alloy, supported by a micro‐arc oxidation (MAO) pretreatment layer, to enhance corrosion resistance and antifouling performance in marine environments.
Chang Liu +5 more
wiley +1 more source
Rare Metals, Volume 45, Issue 7, July 2026.ABSTRACT With the development of industry, fluoride pollution has become increasingly severe. Transition metal phosphides, featuring excellent electrical conductivity and electrochemical stability, are promising electrode materials for capacitive deionization (CDI).
Pengwen Xiao +9 more
wiley +1 more source
Rare Metals, Volume 45, Issue 5, May 2026.ABSTRACT Lithium‐selenium (Li‐Se) batteries have attracted considerable attention due to their high theoretical specific capacity and the intrinsically good electronic conductivity of selenium. Nevertheless, low active‐material utilization, parasitic side reactions, and sluggish reaction kinetics hinder their practical application.
Yanan Fu +8 more
wiley +1 more source
Rare Metals, Volume 45, Issue 4, April 2026.ABSTRACT Photocatalytic hydrogen evolution technology is a crucial approach to achieve efficient solar energy conversion and green hydrogen production. However, traditional semiconductor photocatalysts often face issues such as weak visible‐light response, high photogenerated charge carrier recombination, and poor structural stability, severely ...
Longtao Guo +8 more
wiley +1 more source
Rare Metals, Volume 45, Issue 4, April 2026.ABSTRACT The utilization of carbonaceous anodes in electrochemical systems, particularly potassium‐ion batteries (PIBs), remains hindered by sluggish kinetics and modest capacities, which are caused by the intrinsic ion storage mechanisms and constrained interlayer spacings.
HaiSong Chen +7 more
wiley +1 more source