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Study of sodium lignosulfonate prepare low-rank coal-water slurry:Experiments and simulations

Chinese Journal of Chemical Engineering 2021年第1期34卷 344-353页

作者： Lin Li Chuandong Ma Mengyu Lin Mingpu Liu Hao Yu QingbiaoWang xiaoqiang cao Xiaofang You School of Chemistry and Biological Engineering Shandong University of Science and TechnologyQingdao 266590China College of Safety and Environment Engineering Shandong University of Science and TechnologyQingdao 266590China National Engineering Laboratory for Coalmine Backfilling Mining Shandong University of Science and TechnologyTai'an 271019China Department of Resource and Civil Engineering Shandong University of Science and TechnologyTai'an 271019China

The effect of sodium lignosulfonate(SL)as additive on the preparation of low-rank coal-water slurry(LCWS)was studied by experiments and molecular dynamics(MD)simulation *** experimental results show that the appropriate amount of additives is beneficial to reduce the viscosity of LCWS and increase the slurry *** isotherm studies showed that SL conforms to single-layer adsorption on the coal surface,andΔG_(ads)^(0) was negative,proving that the reaction was *** potential measurements showed that SL increased the negative charge on *** scanning and XPS wide-range scanning were performed on the coal before and after adsorption,and it was found that the content of oxygen functional groups on coal increased after *** results show that when a large number of SL molecules exist in the solution,some SL molecules will bind to hydrophobic hydrocarbon groups on *** rest of the SL molecule s,their hydrophobic alkyl tails,come into contact with each other and aggregate in *** agglomeration of SL molecules and the surface of coal with static electricity will also produce electrostatic interaction,which is conducive to the even dispersion of coal *** results of mean square displacement(MSD)and self-diffusion coefficient(D)show that the addition of SL reduces the diffusion rate of water *** results correspond to experimental results,indicating that MD simulation is accurate and feasible.

关键词： LCWS Low-rank coal Sodium lignosulfonate MD simulation

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Effect of the benzene ring of the dispersant on the rheological characteristics of coal-water slurry:Experiments and theoretical calculations

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International Journal of Mining Science and Technology 2021年第3期31卷 515-521页

作者： Lin Li Chuandong Ma Shanpei Hu Meng He Hao Yu Qingbiao Wang xiaoqiang cao Xiaofang You College of Chemical and Biological Engineering Shandong University of Science and TechnologyQingdao 266590China College of Safety and Environment Engineering Shandong University of Science and TechnologyQingdao 266590China National Engineering Laboratory for Coalmine Backfilling Mining Shandong University of Science and TechnologyTai’an 271019China Department of Resource and Civil Engineering Shandong University of Science and TechnologyTai’an 271019China

In this study,low-rank coal-water slurry(LCWS)was prepared using polyoxyethylene dodecylphenol ether(PDPE)and polyoxyethylene lauryl ether(PLE),respectively.A combination of experiments and simulations was used to investigate the pulping properties and microscopic mechanism of the LCWS samples prepared using the two agents,so as to explore the influence of benzene ring on the performance of *** results of the LCWS preparation experiments revealed that the pulp-forming performance of PDPE exceeded that of *** LCWS concentration is 62%,64%,and 66%,the apparent viscosity corresponding to PDPE is 247.80,504.17,and 653.10 mPa·s,and the apparent viscosity corresponding to PLE is 548.10,1470.61,and 1549.98 mPa·s,*** C_(1000)(When the apparent viscosity is 1000 mPa·s,the corresponding concentration of LCWS is defined as C_(1000))values of PDPE and PLE are 67.60%and 62.95%,*** addition to the van der Waals forces and hydrogen bonds between the PDPE and/or PLE molecules and coal,the benzene rings of PDPE presentπ-πstacking effect with the aromatic rings of *** could facilitate and strengthen the adsorption of PDPE on coal,which would be conducive to further improving the dispersion of coal *** two dispersants have no significant difference in effect on the pyrolysis of *** simulation results indicated that the times for PDPE and PLE molecules to reach flat adsorption state on coal are approximately 290 and 565 ps,*** self-diffusion coefficient(D)of the PDPE and PLE on coal is 3.16 x 10^(-6)and6.57×10^(-6)m~2/s,respectively,and their interaction energies with coal are 785.71 and 648.60 kcal/mol,*** results of the simulation calculations demonstrated that PDPE adsorbed on coal easier than PLE,and its binding is more stable than that of PLE owing to theπ-πstacking effect,which is conducive to uniform dispersion of coal in *** simulation results confirmed the experimental results.

关键词： Low rank coal Low-rank coal-water slurry Benzene ring Molecular dynamics simulation

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ESCRT-I Component VPS23A Is Targeted by E3 Ubiquitin Ligase XBAT35 for Proteasome-Mediated Degradation in Modulating ABA Signaling

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Molecular Plant 2020年第11期13卷 1556-1569页

作者： Feifei Yu xiaoqiang cao Guangchao Liu Qian Wang Ran Xia Xiangyun Zhang Qi Xie State Key Laboratory of Plant Genomics Institute of Genetics and Developmental BiologyThe Innovative Academy of Seed DesignChinese Academy of SciencesBeijing 100101P.R.China University of the Chinese Academy of Sciences Beijing 100049P.R.China

A myriad of abiotic stress responses in plants are controlled by abscisic acid(ABA)*** receptors can be degraded by both the 26S proteasome pathway and vacuolar degradation pathway after processing via the endosomal sorting complex required for transport(ESCRT)*** being essential for ABA signaling,the upstream regulators of ESCRTs remain ***,we report that the ESCRT-I component VPS23A is an unstable protein that is degraded via the ubiquitin-proteasome system(UPS).The UEV domain of VPS23A physically interacts with the two PSAP motifs of XBAT35,an E3 ubiquitin ligase,and this interaction results in the deposition of K48 polyubiquitin chains on VPS23A,marking it for degradation by 26S *** showed that XBAT35 in plants is a positive regulator of ABA responses that acts via the VPS23A/PYL4 complex,specifically by accelerating VPS23A turnover and thereby increasing accumulation of the ABA receptor *** work deciphers how an ESCRT component is regulated in plants and deepens our understanding of plant stress responses by illustrating a mechanism whereby crosstalk between the UPS and endosome-vacuole-mediated degradation pathways controls ABA signaling.

关键词： ABA ubiquitination E3 ubiquitin ligase drought

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Effects of Solution Chemistry Conditions and Adsorbent Surface Properties on Adsorption of Ni(Ⅱ) on Laiyang Bentonite

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China Petroleum Processing & Petrochemical Technology 2016年第3期18卷 66-75页

作者： cao xiaoqiang Yan Bingqi Xue Jianliang Wang Qian Wang Yaping Huang Yongqing Zhang Yan Lyu Xianjun College of Chemical and Environmental Engineering Shandong University of Science and Technology Qingdao 266590

The effects of solution chemistry conditions and adsorbent surface properties on the adsorption of Ni(II) on Laiyang bentonite were investigated via the batch technique. Potentiometric and mass titration techniques were employed in the batch experimental methods, and the results showed that the point of zero net proton charge(PZNPC) of bentonite at different ionic strength denoted p HPZNPC to be 8.2±0.1. The removal of Ni(II) from the solution increased with an increasing bentonite dosage, with the maximum removal efficiency equating up to 99%. The adsorption of Ni(II) on bentonite increased with an increasing p H value at a p H value of 99% at a p H value of >10.2. The Ni(II) adsorption performance exhibited different responses to cations(K+, Na+) but was not influenced by the background anions(NO3-, Cl-, and Cl O4-). The adsorption of Ni(II) was dominated by the outer-sphere surface complexation and ion exchange with Na+/H+ on bentonite surface at low p H value, whereas the inner-sphere surface complexation and surface precipitation were the main adsorption mechanisms at high p H value. The adsorption isotherms of Ni(II) on bentonite can be described well by the Langmuir model. The thermodynamic parameters of adsorption, including the Gibbs free energy, the enthalpy change, and the entropy change, at different temperatures indicated that the adsorption of Ni(II) on bentonite was endothermic and spontaneous.

关键词： nickel surface properties adsorption waste catalyst bentonite

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ESCRT-I Component VPS23A Affects ABA Signaling by Recognizing ABA Receptors for Endosomal Degradation

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Molecular Plant 2016年第12期9卷 1570-1582页

作者： Feifei Yu Lijuan Lou Miaomiao Tian Qingliang Li Yanglin Ding xiaoqiang cao Yaorong Wu Borja Belda-Palazon Pedro L. Rodriguez Shuhua Yang Qi Xie State Key Laboratory of Plant Genomics National Center for Plant Gene Research Institute of Genetics and Developmental Biology Chinese Academy of Sciences Chaoyang District Beijing 100101 P. R. China College of Life Science University of Chinese Academy of Sciences Beijing 100049 P. R. China State Key Laboratory of Plant Physiology and Biochemistry College of Biological Sciences China Agricultural University Beijing 100193 China Instituto de Biologia Molecular y Celular de Plantas Consejo Superior de Investigaciones Cientificas-Universidad Politecnica de Valencia 46022 Valencia Spain

Recent discovery of PYR/PYL/RCAR-type abscisic acid （ABA） receptors has become one of most significant advances in plant science in the past decade. In mammals, endosomal sorting acts as an important pathway to downregulate different types of receptors, but its role in plant hormone signaling is poorly understood. Here, we report that an ubiquitin E2-1ike protein, VPS23A, which is a key component of ESCRT-I, negatively regulates ABA signaling. VPS23A has epistatic relationship with PYR/PYL/RCAR-type ABA receptors and disruption of VPS23A enhanced the activity of key kinase OST1 in the ABA signaling pathway under ABA treatment. Moreover, VPS23A interacts with PYR1/PYLs and K63-1inked diubiquitin, and PYL4 possesses K63-1inked ubiquitinated modification in vivo. Further analysis revealed that VPS23A affects the subcellular localization of PYR 1 and the stability of PYL4. Taken together, our results suggest that VPS23A affects PYR1/ PYL4 via vacuole-mediated degradation, providing an advanced understanding of both the turnover of ABA receptors and ESCRTs in plant hormone signaling.

关键词： ABA receptors ESCRTs ubiquitin endosomal trafficking

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交通荷载作用下承插式综合管廊的动力响应分析

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低温建筑技术 2021年第9期43卷 97-102页

作者：曹晓强中国冶金地质总局青岛地质勘查院山东青岛266019

为了解综合管廊在交通荷载下的力学响应特征,文中基于ABAQUS建立了承插式三维综合管廊模型。结果表明交通荷载对作用范围内两节管廊长度的上部结构响应较大,管廊埋深对插口影响较大而对承口影响较小,此外,承插口总体以受压为主,但倒角... 详细信息

为了解综合管廊在交通荷载下的力学响应特征,文中基于ABAQUS建立了承插式三维综合管廊模型。结果表明交通荷载对作用范围内两节管廊长度的上部结构响应较大,管廊埋深对插口影响较大而对承口影响较小,此外,承插口总体以受压为主,但倒角处拉应力幅值不可忽略。文中结果可为进一步研究交通荷载下管廊响应机理提供参考。

关键词：综合管廊承插口交通荷载动力响应

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有机膨润土对阴离子和非离子染料的吸附研究

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水处理技术 2016年第8期42卷 74-78页

作者：陈平曹晓强张燕山东科技大学化学与环境工程学院山东青岛266590

研究了有机改性膨润土对阴离子染料和非离子染料的吸附特性。结果表明,在一定的改性剂用量范围内,染料吸附量随改性剂用量的增加而增加,适当剂量改性的膨润土对染料吸附效果良好;酸性蓝的吸附量及吸附速率明显高于其它3种染料。吸附动... 详细信息

研究了有机改性膨润土对阴离子染料和非离子染料的吸附特性。结果表明,在一定的改性剂用量范围内,染料吸附量随改性剂用量的增加而增加,适当剂量改性的膨润土对染料吸附效果良好;酸性蓝的吸附量及吸附速率明显高于其它3种染料。吸附动力学行为适合于准2级反应动力学方程;染料在有机膨润土上的吸附量随温度变化而不同,酸性蓝、中性蓝、分散黄及分散红的吸附量变化分别是55℃>40℃>25℃、25℃>40℃>55℃、55℃>40℃>25℃和55℃>25℃>40℃。酸性蓝染料的吸附量受p H影响较小,中性蓝、分散黄及分散红染料的吸附则均是随p H升高而降低。实际应用中要充分考虑不同染料吸附性质的差异。

关键词：有机膨润土吸附特性阴离子染料非离子染料

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纤维种类对纤维束过滤器除尘性能的影响

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环境工程学报 2019年第3期13卷 701-707页

作者：付群飞房杰时杰曹晓强吕宪俊山东科技大学化学与环境工程学院青岛266590 山东泰山钢铁集团有限公司莱芜271199

为了探究聚丙烯腈纤维、玻璃纤维和聚丙烯纤维3种纤维对纤维束过滤器除尘性能的影响,以路面扬尘为研究对象,在入口颗粒物浓度0.58 g·m^(-3)、风速1.0 m·s^(-1)、流量63.62 m^3·h^(-1)、纤维填充率0.67%的条件下,研究不同过滤单元材质... 详细信息

为了探究聚丙烯腈纤维、玻璃纤维和聚丙烯纤维3种纤维对纤维束过滤器除尘性能的影响,以路面扬尘为研究对象,在入口颗粒物浓度0.58 g·m^(-3)、风速1.0 m·s^(-1)、流量63.62 m^3·h^(-1)、纤维填充率0.67%的条件下,研究不同过滤单元材质(聚丙烯腈纤维、玻璃纤维和聚丙烯纤维)除尘效率和压降的变化情况。结果表明,3种材质中聚丙烯腈纤维束除尘性能最好,除尘效率为70%～80%,其除尘效率比聚丙烯纤维束整体高20%。通过过滤介质表面电荷密度测定发现,在实验过程中,3种纤维表面都存在电荷,且聚丙烯腈纤维电荷密度>玻璃纤维电荷密度>聚丙烯纤维电荷密度。通过SEM检测发现,粉尘颗粒以静电吸附和纤维间填充2种方式赋存于过滤器内部,这表明纤维束过滤器除尘机理为静电作用和机械拦截作用的联合。

关键词：路面扬尘纤维束过滤器扬尘静电吸附扬尘机械拦截

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黑土区坡耕地土壤侵蚀及水分利用效率对不同覆盖耕作模式的响应

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排灌机械工程学报 2024年第8期42卷 826-834页

作者：刘继龙王志卓曹晓强董泽刘倩倩曹冉东北农业大学水利与土木工程学院黑龙江哈尔滨150030 东北农业大学农业农村部农业水资源高效利用重点实验室黑龙江哈尔滨150030

为揭示不同覆盖耕作模式对黑土区坡耕地土壤侵蚀防治及水分利用效率的影响机制,设置顺坡免耕碎秆均匀覆盖(SM)、顺坡免耕覆盖作物(SC)、横坡免耕碎秆均匀覆盖(CM)和传统耕作(CK)4种覆盖耕作模式,研究分析黑土区坡耕地土壤水分动态变化规... 详细信息

为揭示不同覆盖耕作模式对黑土区坡耕地土壤侵蚀防治及水分利用效率的影响机制,设置顺坡免耕碎秆均匀覆盖(SM)、顺坡免耕覆盖作物(SC)、横坡免耕碎秆均匀覆盖(CM)和传统耕作(CK)4种覆盖耕作模式,研究分析黑土区坡耕地土壤水分动态变化规律,明确不同覆盖耕作模式的土壤侵蚀特征,分析不同覆盖耕作模式对水分利用效率的影响.结果表明:顺坡免耕碎秆均匀覆盖(SM)、顺坡免耕覆盖作物(SC)和横坡免耕碎秆均匀覆盖(CM)均能不同程度地增加土壤水分含量,防治土壤侵蚀和提高水分利用效率.SM处理、SC处理与CM处理较CK处理0~80 cm不同土层土壤含水率分别提高9.34%~18.20%,5.30%~11.54%和9.12%~19.84%;径流量、侵蚀量、降雨量和最大30 min雨强(I_(30))均与水分利用效率呈显著负相关性;SM处理、SC处理和CM处理的水分利用效率较CK处理均有提高,其增幅介于1.18%~10.76%.通过对比分析减流减蚀效果和水分利用效率,发现在防治土壤侵蚀,蓄水保墒及提高水分利用效率方面,横坡免耕碎秆均匀覆盖模式效果更好.

关键词：土壤侵蚀水分利用效率覆盖措施耕作方式坡耕地

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不同覆盖及耕作措施对黑土区坡耕地土壤养分时空变化特征及作物产量的影响

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干旱地区农业研究 2024年第4期42卷 189-198页

作者：刘继龙董泽曹晓强王志卓刘倩倩曹冉东北农业大学水利与土木工程学院黑龙江哈尔滨150030 农业农村部农业水资源高效利用重点实验室黑龙江哈尔滨150030

为探究不同覆盖及耕作措施对黑土区坡耕地米-豆轮作农田土壤养分时空变化特征及作物产量的影响机制,于2022—2023年进行田间试验,设置顺坡碎秆均匀覆盖(SM),横坡碎秆均匀覆盖(CM)、顺坡覆盖作物(SC)和传统耕作(CK)4个处理,分析不同覆盖... 详细信息

为探究不同覆盖及耕作措施对黑土区坡耕地米-豆轮作农田土壤养分时空变化特征及作物产量的影响机制,于2022—2023年进行田间试验,设置顺坡碎秆均匀覆盖(SM),横坡碎秆均匀覆盖(CM)、顺坡覆盖作物(SC)和传统耕作(CK)4个处理,分析不同覆盖及耕作措施下土壤养分含量随生育时期和土层深度的变化趋势以及作物产量表现,明确不同覆盖及耕作措施下土壤硝态氮(NO_(3)^(-)-N)、铵态氮(NH_(4)^(+)-N)、速效磷(AP)、速效钾(AK)含量与作物产量之间的相关关系。结果表明:随作物生育时期的推进,各处理土壤AP含量呈先增加后降低的变化趋势,土壤AK含量呈逐渐减小的变化趋势;各处理土壤NH_(4)^(+)-N、NO_(3)^(-)-N、AP和AK含量随土层加深整体上呈逐渐减小的趋势。各处理的作物干物质量和产量较CK分别显著提升3.29%~11.96%和4.29%~14.77%;除2022年0~20 cm和20~40 cm土层土壤NH_(4)^(+)-N含量外,其余各土层土壤养分含量与作物产量均呈显著正相关关系(P<0.05),土壤AK含量对作物产量的影响程度更高。

关键词：坡耕地米-豆轮作覆盖土壤养分作物产量

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