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Analysis on influencing factors of detecting chemical oxygen demand in water by three-dimensional spectroscopy

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Optoelectronics Letters 2024年第1期20卷 42-47页

作者： ZHOU Kunpeng LIU Zhiyang CONG Menglong MAN Shanxin Inner Mongolia Autonomous Region Joint Laboratory of Nuclear and Radiation Detection College of Physics and Electronic InformationInner Mongolia Minzu UniversityTongliao 028000China College of Information Engineering Jingzhou UniversityJingzhou 434000China Alxa League Meteorological Bureau Alxa 750300China

This paper focuses on the standard chemical oxygen demand(COD)liquid and studies the impact of pH,nitrite nitrogen,nitrate nitrogen,heavy metals,salinity,and other factors on fluorescence intensity and fluorescence peak positions during the detection of COD in water using fluorescence *** influence mechanisms of different environmental factors on fluorescence spectra are also *** indicate that pH value affects the fluorescence emission wavelength(Em),resulting in a red shift from 1.5 to 7.2,and a blue shift from 7.2 to *** nitrogen can react with organic matter in water to form nitro compounds,leading to a decrease in fluorescence *** has a negligible effect on T1 peak but a relatively large effect on T2 *** metal ion concentration has a significant impact on T2 peak,while T1 peak position shifts with an increase in heavy metal *** study aims to explore the factors that can impact the detection of COD in water using three-dimensional fluorescence spectrometry,providing references to improve accuracy and practicability for COD detection based on three-dimensional fluorescence spectrometry.

关键词： chemical negligible nitrate

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China's Foreign Trade 2009年第1期 11-11页

Under the host of Spanish Ambassador to China,Carlos Blasco Villa,a cooperation agreement between China Nationa chemical Information Center (CNCIC) and Chinaconsultants company from Spain,was signed on December 4,Beij... 详细信息

关键词： USS chemical 110 La

Exploration of Operation and Maintenance Management Mode and Innovation Mechanism of Pilot Base of chemical Park

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Asian Agricultural Research 2024年第9期16卷 16-18,22页

作者： Shenggan ZHU Tengfei SHANG Zhejiang Titan Design&Engineering Co. Ltd.Hangzhou 310012China Zhejiang Academy of Emergency Management Science and Technology Hangzhou 310012China

Based on the current situation of the operation and maintenance management of the pilot base in many chemical parks in China,this paper conducts an in-depth exploration of the operation and maintenance management and innovation mode of the pilot base from the aspects of the evaluation of the pilot project entering the park,safety and environmental protection supervision,pilot mode,and industrialization mode of the pilot test results,so as to provide solutions for accelerating the process and industrialization of the pilot project and realizing the innovation value of the pilot base.

关键词： chemical parks Pilot base Operation and maintenance Mode Industrialization Exploration

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China's Foreign Trade 2009年第14期 11-11页

Sinopec reports 1.82%rise in refining in H1 China Petrochemical Corporation(Sinopec),the nation’s largest oil refiner, said on July 21 that it processed 86.9 million tonnes of crude oil in the first half of 2009,up 1... 详细信息

关键词： chemical down

Erratum to: Electronic tattoos based on large-area Mo2C grown by chemical vapor deposition for electrophysiology

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Nano Research 2024年第4期17卷 3427-3427页

作者： Shiyu Wang Xin Wang Weifeng Zhang Xiaohu Shi Dekui Song Yan Zhang Yan Zhao Zihan Zhao Nan Liu Beijing Key Laboratory of Energy Conversion and Storage Materials College of ChemistryBeijing Normal UniversityBeijing 100875China Beijing Graphene Institute Beijing 100094China

Erratum to Nano Research 2023,16(3):4100−4106 https://***/10.1007/s12274-023-5423-y In the first pages of the maintext and the ESM of the original version of this paper,the order of affiliations of the authors was in a wrong sequence.“Beijing Key Laboratory of Energy Conversion and Storage Materials,College of Chemistry,Beijing Normal University,Beijing 100875,China”should be the first affiliation and“Beijing Graphene Institute,Beijing 100094,China”should be the second affiliation.

关键词： Conversion wrong chemical

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China's Foreign Trade 2009年第8期 14-14页

China’s chemical industrial output up 2.4%,contracting trendeased The industrial production of China’s chemical sector increased 2.4 percent year on year in the first two months,and the falling trend for major prod... 详细信息

关键词： down chemical

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China's Foreign Trade 2009年第11期 11-11页

April profits of Chinese petrochemical firms rise nearly 45%on lower crude prices China’s five leading petrochemical firms posted combined profits of RMB 27.1 billion(US$3.99 billion) last month,an increase of 44.8 p... 详细信息

关键词： SPC US chemical

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China's Foreign Trade 2009年第15期 11-11页

CNOOC drills new oil,gas discovery in East China’s Bohai Bay The China National Offshore Oil Company Ltd.(CNOOC Ltd.) said on July 28 it has successfully drilled a new oil and gas field in East China’s Bohai Bay. Th... 详细信息

关键词： Bay than chemical

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China's Foreign Trade 2008年第17期 15-15页

China begins 150% special export tariff on fertilizers China on September I launched a 150% special export tar- iff on nitrogenous fertilizer and synthetic ammonia, a move to satisfy domestic demand, according to the customs tariff com- mission (CTC) of the State Council. The commission said the special tariff on the two products would last through the end of this year. The previous tariff for the two fertilizers was 100%. It is also said the 100% special export tariff on other fertilizers has been extended to the end of this year.

关键词： USS LPG chemical Pro