Results 1 to 10 of about 2,412 (92)
Gongye shui chuli, 2021 采用Fe3O4与PAC制备磁性-化学沉淀复合试剂MPACl，将其用于处理磷化工企业高含磷模拟生产废水。利用响应曲面法进行分析优化，得到对TP去除率影响大小顺序：MPACl投加量> PAC质量分数> pH。最佳运行条件为：MPACl中PAC占比74.75%，MPACl投加量16.07 g/L，pH=9，TP去除率为97.38%。MPACl除磷机理主要为：MPACl中聚合氯化铝水解并与磷酸根发生化学沉淀作用；磁性絮体对磷酸盐的化学吸附和沉淀网捕作用。
梁宏 +4 more
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Zhejiang Daxue xuebao. Lixue ban, 2004 以四氯化钛(TiCl4)为原料,采用3种不同的沉淀剂制备了纳米二氧化钛粉体.用TG-DTA和FT-IR对前驱体进行了分析.结果表明,不同沉淀剂导致粉体表面状态不同.以乙酸和尿素为沉淀剂的粉体表面不仅沉淀剂可以形成化学吸附,水分子也参与反应并在粉体表面形成-OH基团,而以EDTA为沉淀剂的粉体表面只吸附沉淀剂.煅烧后,用TEM对颗粒形貌进行了表征.实验发现,以EDTA为沉淀剂制备的粉体分散性优于其他沉淀剂制备的二氧化钛颗粒.这些差异主要是由于沉淀剂的性质及其在粉体表面的吸附状态不同.
LIUBo(刘波) +5 more
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Gongye shui chuli, 2011 化学沉淀法是一种传统的水处理方法,具有技术成熟、投资少、处理成本低、自动化程度高等诸多优点,在国内外已广泛应用。主要介绍了化学沉淀法处理重金属废水的研究进展,阐述了3种化学沉淀法的优缺点、重金属去除率的影响因素及今后的研究方向。
郭燕妮 +5 more
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Gongye shui chuli, 1986 当今水处理技术发展很快,种类繁多,如混凝沉淀、化学沉淀、过滤、吸附、膜法、离子交换、生物降解、化学氧化等等。但作为基本的、常用的水处理技术,深度处理的前处理技术,仍是混凝沉淀。正因为如此,它吸引了不少专家和学者,最近二十年来,它获得了很快的发展。本文仅就混凝沉淀中的混凝反应部分的理论作些粗浅的介绍。
刘荣光
doaj +2 more sources
Gongye shui chuli, 2008 在同步沉淀工艺的基础上，综述了同步沉淀在不同的污水生物处理工艺中的除磷效果、化学试剂用量的控制、除磷过程模拟的研究进展，并重点讨论了同步沉淀中的化学试剂对生物处理系统性能的影响。最后，展望了同步沉淀在污水生物处理中的应用前景和研究方向。
左艳兵 +4 more
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Rare Metals, Volume 45, Issue 9, September 2026.ABSTRACT The performance optimization of ultrahigh‐strength Cu‐15Ni‐8Sn alloy relies on controlling recrystallization and aging precipitation, which are two thermally activated processes constrained by high activation barriers. Conventional heat treatment requires elevated temperatures and prolonged holding time, inevitably leading to grain coarsening ...
Fei Tan +10 more
wiley +1 more source
Gongye shui chuli, 2015 以总磷为去除对象, 采用臭氧氧化—化学沉淀法联合工艺进行电镀含磷废水的处理。考察了臭氧投加量、臭氧反应时间、废水中总磷初始浓度、废水初始pH对非正磷酸盐氧化率的影响以及沉淀剂种类和浓度对沉淀效率的影响。实验结果表明, 经过臭氧氧化—化学沉淀法联合工艺的处理, 电镀废水总磷指标可以稳定达到《电镀污染物综合排放标准》(GB 21900—2008)表3中水污染物特别排放限值。
陈良 +8 more
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Uncovering Cu Involved Nanophase Structures and Transformation in a Novel 7075B Aluminum Alloy
Rare Metals, Volume 45, Issue 9, September 2026.ABSTRACT In this study, aberration‐corrected transmission electron microscopy combined with first‐principles calculations was employed to systematically investigate the Cu‐involved crystal structures and evolution mechanisms of nanoprecipitates in a novel 7075B Al alloy. Firstly, an atomic model of the early‐stage GP‐ηp structure together with specific
Deyu Zhang +13 more
wiley +1 more source
Rare Metals, Volume 45, Issue 8, August 2026.ABSTRACT A facile coprecipitation‐pyrolysis strategy was employed to fabricate Cu/Co nanoparticles (NPs) embedded in nitrogen‐doped carbon matrices (Cu/Co@N‐C) through the carbonization of CuCo‐MOF precursors. Moreover, monometallic counterparts of Cu@N‐C and Co@N‐C were also prepared via carbonization of bimetallic CuZn‐MOF and CoZn‐MOF, respectively.
Weinan Yao +7 more
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Microstructure Tailoring of Laser Powder Bed Fused Nb521 Alloy Toward Strength‐Ductility Synergy
Rare Metals, Volume 45, Issue 8, August 2026.ABSTRACT Niobium‐based refractory alloys are promising candidates for high‐temperature aerospace structures, yet their limited ambient‐temperature ductility and poor processability remain major barriers to broader implementation. Here, Nb521 alloy was fabricated by laser powder bed fusion (LPBF), and the effects of processing conditions and subsequent ...
Lele Qin +7 more
wiley +1 more source