Results 31 to 40 of about 1,257,909 (166)
Rare Metals, Volume 45, Issue 3, March 2026.ABSTRACT Recently, cobalt/nitrogen co‐doped materials have emerged as heterogeneous catalysts to activate peroxymonosulfate (PMS) and have been applied to advanced oxidation processes for environmental remediation. However, their recyclability and reusability remain major barriers to practical application.
Wen‐Kai Zhu +11 more
wiley +1 more source
, 2018 以聚丙烯酰胺(PAM)为助凝剂,比较了4种絮凝剂对印染整理废水中的COD和浊度的去除效果,通过正交实验确定了优化混凝条件;并进一步采用纳滤膜NF270对混凝上清液进行处理,纳滤浓缩液再经混凝-纳滤在处理。结果表明,混凝优化条件,pH为7,聚合氯化铝(PAC)、PAM投加量分别为400、1.6 mg/L,在此条件下,废水中COD去除效果最好,去除率达88%以上。混凝后的上清液经纳滤膜处理,出水COD为33 mg/L;纳滤浓缩液再经混凝-纳滤再处理后,出水COD可降至30 mg/L,出水水质均满足GB/T ...
刘威, 杭晓风, 万印华
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Gongye shui chuli, 2015 秦皇岛某污水处理厂采用A2/O工艺进行污水处理, 设计出水满足《城镇污水处理厂污染物排放标准》(GB 18918-2002)的二级标准限值要求。由于对污水排放要求的提高, 该厂出水不能外排, 需进入中水厂进行深度处理。基于污水处理厂现状, 在分析工艺能耗构成的基础上, 通过合理确定污水处理程度, 调节风机风量分配, 对污水提升泵进行变频改造与优化运行, 达到了降低污水处理厂能耗的目的。
雷兆武, 冀玉山, 金波
doaj
Ultrasound in Obstetrics &Gynecology, Volume 67, Issue 3, Page 272-282, March 2026.ABSTRACT Objective Complete hydatidiform mole and coexisting normal fetus (CHMCF) is a rare condition for which there is significant heterogeneity in diagnosis, counseling and management of complications. The objective of this study was to summarize the prevalence of clinical outcomes in reported cases of CHMCF.
N. Salmeri +8 more
wiley +1 more source
Gongye shui chuli, 2016 以某眼药厂污水处理工程为实例，介绍了有机废水预处理及综合废水处理的工艺、构筑物参数及效果。针对眼药厂小牛血提取物清洗废水污染物浓度高，有机成分较多的问题，采用厌氧法进行预处理，以降低后续单元的处理负荷，再利用水解酸化、气浮、生物接触氧化对综合废水进行处理，另外利用改良的MBR法及二氧化氯消毒工艺对综合废水进行深度处理。该工艺易于管理，污染物去除率高，处理效果稳定，实现了污水无害化处理。
刘娜, 张计涛, 张霞, 许海军
doaj
Wildlife Letters, Volume 4, Issue 1, Page 32-41, March 2026.Effective wildlife law enforcement is important in the drive for biodiversity conservation. This study examined the challenges of wildlife law enforcement in Oyo and Lagos States of Nigeria across four security outfits (Nigerian Police Force [NPF], Nigerian Customs Service [NCS], National Environmental Standards and Regulations Enforcement Agency ...
Oluwatosin Mercy Dada +2 more
wiley +1 more source
, 2019 针对煤气化过程形成的废水量大、成分复杂、污染物含量较高,且因煤种、气化工艺不同而成分变化,处理难度很大的特点,研究采用冷冻浓缩技术对Texaco和Lurgi法气化废水进行处理。结果表明,采用冷冻浓缩技术可以将气化废水中的有机物和无机物基本脱除,产水的COD不超过10mg/L,COD和电导率符合HG/T3923-2007循环冷却水用再生水水质标准,不易受进水中钙离子含量的影响。处理Texaco和Lurgi气化废水的产水率分别超过90%和95%,可显著提高废水回用率,并降低废水处理量 ...
吴二飞 +5 more
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Gongye shui chuli, 2017 河南某焦化厂污水处理站采用预处理—生化—混凝沉淀常规处理工艺，出水水质差，影响后续回用单元处理效果。在原有废水处理设施基础上，工程改造在预处理单元增加污泥吸附，并在曝气池投加活性焦粉吸附剂，形成活性焦吸附与生化处理耦合工艺，提高生化处理效果。增加活性焦吸附深度处理单元，对混凝沉淀池出水进行进一步吸附处理，确保最终出水COD达到《炼焦化学工业污染物排放标准》（GB 16171—2012）。
张萌 +4 more
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Rare Metals, Volume 45, Issue 2, February 2026.ABSTRACT Porous NiTi alloys are widely used in biomedical and engineering fields. Using the PBF‐LB technique, the TPMS and Voronoi porous parts with a porosity of ∼67% and a minimum feature size of 0.15 ± 0.02 mm were fabricated. Although the bulk sample fabricated with the same parameters is defect‐free, μ‐CT reconstruction on the porous sample ...
Wen‐Hao Zeng +7 more
wiley +1 more source
Gongye shui chuli, 2019 河南某煤化工企业采用分质预处理和多种工艺组合方式深度处理煤化工废水，即采用水解酸化+UASB预处理乙二醇废水，两级破氰技术预处理煤气化废水，经预处理的废水与其他生产废水、生活污水混合后采用A/O生化处理；对生化出水、循环排污水和除盐排污水的混合水采用臭氧氧化+曝气生物滤池（BAF）组合工艺深度处理。结果表明，最终出水水质满足《污水综合排放标准》（GB 8978-1996）的一级标准和《城镇污水处理厂污染物排放标准》（GB 18918-2002）的一级A标准。
王文豪, 高健磊, 高镜清
doaj