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Chinese Chemical Letters 2024年第1期35卷 406-411页

作者： Mengzhou Wang Mingyan Fu Junfeng Li Yihui Niu Qingrui Zhang qina sun Hebei Key Laboratory of Heavy Metal Deep-Remediation in Water and Resource Reuse School of Environmental and Chemical EngineeringYanshan UniversityQinhuangdao 066004China Laboratory of Environmental Technology INETTsinghua UniversityBeijing 100084China

Polystyrene resins(PS)have been practical ion exchangers for radionuclides removal from ***,nonspecific effects of ion exchange groups continue to be a major obstacle for emergency treatment with coexisting ions of high *** selectivity for Cs+enables zirconium phosphate(ZrP)to be the most promising inorganic sorbent for radioactive cesium extraction,despite being difficult to synthesize and causing excessive pressure loss in fixed-bed reactors due to fine ***,through facile confined crystallization in host macropores,we prepared PS confinedα-ZrP nanocrystalline(ZrP-PS).Size-screen sorption of layeredα-ZrP and sulfonic acid group preconcentration of PS synergistically enable a considerably higher Cs+affinity of ZrP-PS than PS,as confirmed by X-ray photoelectron spectroscopy(XPS)***-PS demonstrated remarkable cesium sequestration performance in both batch and continuous experiments,with a high adsorption capacity of 269.58 mg/g,a rapid equilibrium within 80 min,and a continuous effluent volume of 2300 L/kg *** the excellent selectivity for Cs+and flexibility to separate from treated water,ZrP-PS holds great promise as purification packages for the emergency treatment of radioactively contaminated water.

关键词： Zirconium phosphate Nanocrystalline Polystyrene resin Cesium Removal

DNDC模型在稻田水肥管理中的应用研究进展

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生态学杂志 2024年第7期43卷 2198-2207页

作者：万佳静景元书吉梦宇孙琪娜南京信息工程大学应用气象学院/气象灾害预报预警与评估协同创新中心南京210044 江苏省农业气象重点实验室南京210044

稻田生态系统是重要的碳库,它具有碳源和碳汇双重功能。充分发挥稻田碳汇功能对推进低碳绿色农业生产方式和保障农业可持续发展具有重要意义。稻田水肥管理模式很大程度上影响了温室气体的排放和稻田碳固存能力。本文综述了近年来DNDC... 详细信息

稻田生态系统是重要的碳库,它具有碳源和碳汇双重功能。充分发挥稻田碳汇功能对推进低碳绿色农业生产方式和保障农业可持续发展具有重要意义。稻田水肥管理模式很大程度上影响了温室气体的排放和稻田碳固存能力。本文综述了近年来DNDC模型在稻田水肥管理中的应用研究进展。从稻田生态系统固碳减排角度出发,总结了稻田水肥管理措施对温室气体CH4和N2 O排放、土壤碳库和作物生产固碳的影响,评价了不同稻田轮作模式的固碳减排效应,并展望了DNDC模型在未来稻田生态系统的应用前景。研究结果将为未来稻作生产固碳减排,实现农业生产可持续发展提供理论参考。

关键词：生物地球化学模型农田固碳减排敏感性分析

Selective adsorption of phosphate in water using lanthanum-based nanomaterials:A critical review

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Chinese Chemical Letters 2021年第9期32卷 2637-2647页

作者： Mamitiana Roger Razanajatovo Wenyan Gao Yaran Song Xuan Zhao qina sun Qingrui Zhang Hebei Key Laboratory of Heavy Metal Deep-Remediation in Water and Resource Reuse and the Laboratory of Applied ChemistryYanshan UniversityQinhuangdao 066004China State Key Laboratory of Metastable Materials Science and Technology Yanshan UniversityQinhuangdao 066004China

In recent years,lanthanum-based nanomaterials(La-NMs)are selected as an efficient nano-adsorbent for phosphate removal because La3+has a strong affinity with oxygen-donor atoms from ***,there are a broad interest and literature base for the effect of different synthesis optimization and environmental parameters on the adsorption performance of La-NMs.A considerable amount of research has also investigated the regeneration and application of La-NMs to real wastewater in a laboratory *** on the literature survey,it was found that La-NMs are often produced via co-precipitation and hydrothermal ***,phosphate’s adsorption process and behavior onto La-NMs are described well with the pseudo-second-order model and Langmuir *** interaction mechanism between phosphate and La-NMs are dominated by ligand exchange,surface complexation and electrostatic ***,phosphate could easily desorb from La-NMs due to the weak H-bonding interaction between phosphate and the H-bond acceptor groups on the surface of *** the wealth of literature available in this area,there is a lack of systematic review to evaluate the gaps in the use of La-NMs to eliminate phosphate in *** this review,we mainly summarize and discuss the role and the effect of the synthesis techniques on the physicochemical properties and the adsorption behavior of *** possible adsorption mechanism,regeneration efficiency,and the application of La-NMs to the real environmental samples are also presented and highlighted.

关键词： Lanthanum-nanomaterials Synthesis Phosphate Adsorption mechanism Regeneration Application

Ferric ion-ascorbic acid complex catalyzed calcium peroxide for organic wastewater treatment:Optimized by response surface method

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Chinese Chemical Letters 2021年第11期32卷 3387-3392页

作者： Deling Yuan Chen Zhang Shoufeng Tang Zetao Wang qina sun Xiaoyu Zhang Tifeng Jiao Qingrui Zhang Hebei Key Laboratory of Heavy Metal Deep-Remediation in Water and Resource Reuse Hebei Key Laboratory of Applied ChemistrySchool of Environmental and Chemical EngineeringYanshan UniversityQinhuangdao 066004China State Key Laboratory of Metastable Materials Science and Technology Yanshan UniversityQinhuangdao 066004China

Hydrogen peroxide(H_(2)O_(2))disproportionation,iron precipitation,and narrow pH range are the drawbacks of traditional Fenton *** surmount these barriers,we proposed a ferric ion(Fe^(3+))-ascorbic acid(AA)complex catalyzed calcium peroxide(CaO_(2))Fenton-like system to remove organic dyes in *** collaborative Fe^(3+)/AA/CaO_(2)system presented an obvious improvement in the methyl orange(MO)decolorization,and also effectively eliminated other *** surface method was employed to optimize the running parameters for this coupling *** the optimized arguments(2.76 mmol/L Fe^(3+),0.68 mmol/L AA,and 4 mmol/L CaO_(2)),the MO removal achieved 98.90%after 15 min at pH 6.50,which was close to the computed outcome of 99.30%.Furthermore,this Fenton-like system could perform well in a wide range of pH(3-11),and enhance the H_(2)O_(2)decomposition and Fe ions *** scavenger experiment result indicated that hydroxyl radical,superoxide anion free radical,and singlet oxygen were acted on the dye ***,electron spin resonance analysis corroborated that the existences of these active species in the Fe^(3+)/AA/CaO_(2)*** study could advance the development of Fenton-like technique in organic effluent disposal.

关键词： Ferric ion Ascorbic acid Calcium peroxide Response surface method Dye removal

Adsorption of Co(Ⅱ) from aqueous solution by synthesized chitosan-g-poly(acrylic acid) hydrogel

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Adsorption of Co(Ⅱ) from aqueous solution by synthesized ch...

2015 2nd International Conference on Machinery,Materials Engineering,Chemical Engineering and Biotechnology(MMECEB 2015)

作者： qina sun Yujia Yang Jiawei Li Yipeng Shen Junfeng Li School of Environmental and Chemical Engineering Yanshan University Institute of Nuclear and New Energy Technology Tsinghua University

Adsorption of Co(Ⅱ) on synthesized chitosan-g-poly(acrylic acid) hydrogel was investigated,using batch adsorption technique under different experimental conditions of equilibrium p H,concentration of common competing ions,contact time and *** Langmuir adsorption model fitted the experimental data reasonably well better than Freundlich *** maximum monolayer adsorption capacity of Co(Ⅱ) was 73.0mg/g at 298 *** experiments indicated that the adsorption of Co(Ⅱ) on synthesized chitosan-g-poly(acrylic acid) hydrogel can be simulated by pseudo-first-order model.

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载钛活性炭电吸附去除Cr(Ⅵ)的研究

环境工程学报 2007年第2期1卷 59-63页

作者：孙奇娜盛义平燕山大学环境与化学工程学院秦皇岛066004

采用sol-gel法制备了载钛活性炭,并用于电吸附处理含铬废水。当Cr(Ⅵ)初始浓度为20 mg/L时,载钛活性炭上施加1.2 V的正向电压,电吸附3 h后的处理水水质满足国家排放标准。研究了载钛活性炭电吸附去除Cr(Ⅵ)的影响因素及TiAC的电脱附再生。

关键词：载钛活性炭电吸附 Cr(Ⅵ) 电脱附再生

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预期收益最大化与“蚁族”现象

西北人口 2012年第1期33卷 37-40,45页

作者：吴克明孙琪娜华中师范大学管理学院武汉430079

蚁族现象的本质是大学毕业生选择在大城市还是中小城镇就业的问题。从理性人假设的角度来看,"蚁族"现象的原因在于"蚁族"们为了获得更多的就业机会、更高的就业质量等经济收益,和更多的教育收益、消费收益、心理收益和健康收益等非经济... 详细信息

蚁族现象的本质是大学毕业生选择在大城市还是中小城镇就业的问题。从理性人假设的角度来看,"蚁族"现象的原因在于"蚁族"们为了获得更多的就业机会、更高的就业质量等经济收益,和更多的教育收益、消费收益、心理收益和健康收益等非经济收益,从而主动选择在大城市就业的结果。减少"蚁族"现象的思路在于提高大学毕业生收入、促进教育公平和均衡发展、重视发展中小城镇、引导大学毕业生到中小城镇就业。

关键词： “蚁族”现象理性人假设经济收益非经济收益

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试样状态对铜合金脱铬腐蚀的影响

稀有金属材料与工程 2007年第A3期36卷 299-303页

作者：刘建华张瑞军杨景茹孙奇娜燕山大学亚稳材料制备技术与科学国家重点实验室河北秦皇岛066004 河北建材职业技术学院河北秦皇岛066004 中国环境干部管理学院河北秦皇岛066004

针对铜合金在HCl溶液中脱铬腐蚀问题,借助金相、X射线衍射(XRD)、扫描电镜(SEM/EDX)及X射线荧光光谱仪测试手段研究了试样状态对铜合金脱铬腐蚀的影响,并对其脱铬机理进行了分析。结果表明:试样变形量越大,表面越粗糙,铜合金脱铬孕育期... 详细信息

针对铜合金在HCl溶液中脱铬腐蚀问题,借助金相、X射线衍射(XRD)、扫描电镜(SEM/EDX)及X射线荧光光谱仪测试手段研究了试样状态对铜合金脱铬腐蚀的影响,并对其脱铬机理进行了分析。结果表明:试样变形量越大,表面越粗糙,铜合金脱铬孕育期越短及脱铬时所需的HCl溶液的浓度和温度越低。同时,变形能增大脱铬速率,降低脱铬层组织的致密度;而表面粗糙度对脱铬速率和脱铬层组织的致密度影响不大。

关键词：铜合金脱铬腐蚀表面粗糙度变形

CuNiCrAl合金在H_2SO_4溶液中的腐蚀行为

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稀有金属材料与工程 2007年第A3期36卷 295-298页

借助金相、X射线衍射(XRD)、扫描电镜(SEM/EDX)及X射线荧光光谱仪研究了CuNiCrAl合金在H_2SO_4溶液中的腐蚀行为。结果表明:CuNiCrAl合金在低温H_2SO_4溶液中,合金中的Cu相较易腐蚀;当H_2SO_4溶液浓度和温度达到一定值时,合金出现脱铬... 详细信息

借助金相、X射线衍射(XRD)、扫描电镜(SEM/EDX)及X射线荧光光谱仪研究了CuNiCrAl合金在H_2SO_4溶液中的腐蚀行为。结果表明:CuNiCrAl合金在低温H_2SO_4溶液中,合金中的Cu相较易腐蚀;当H_2SO_4溶液浓度和温度达到一定值时,合金出现脱铬腐蚀现象,溶液的浓度和温度越高,脱铬倾向越大,且溶液添加NaCl能促进合金的脱铬腐蚀,还对CuNiCrAl合金的脱铬机制进行了探讨。

关键词： CuNiCrAl合金 H2SO4溶液脱铬腐蚀

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试样状态对Cu-Cr合金脱铬腐蚀的影响

中国腐蚀与防护学报 2009年第1期29卷 15-18,23页

作者：范力茹刘玉文王宽李媛孙奇娜燕山大学理学院秦皇岛066004 燕山大学环境与化学工程学院秦皇岛066004 河北科技师范学院秦皇岛066004 中国环境干部管理学院环境工程系秦皇岛066004

针对铜合金在HCl溶液中脱铬腐蚀问题,借助金相显微镜、X射线衍射仪(XRD)、扫描电镜(SEM/EDX)及X射线荧光光谱仪等测试手段研究了试样状态对Cu-Cr合金脱铬腐蚀的影响,并分析了脱铬机理。结果表明:试样变形量越大,表面越粗糙,Cu-Cr合金脱... 详细信息

针对铜合金在HCl溶液中脱铬腐蚀问题,借助金相显微镜、X射线衍射仪(XRD)、扫描电镜(SEM/EDX)及X射线荧光光谱仪等测试手段研究了试样状态对Cu-Cr合金脱铬腐蚀的影响,并分析了脱铬机理。结果表明:试样变形量越大,表面越粗糙,Cu-Cr合金脱铬孕育期越短,HCl溶液的浓度和温度越低,越有助于脱铬。同时,变形可使脱铬速率增大,脱铬层组织的致密度降低;而表面粗糙度对脱铬速率影响不大。

关键词： Cu—Cr合金脱铬腐蚀表面粗糙度变形