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Chinese Journal of Chemical Engineering 2018年第7期26卷 1528-1535页

作者： Yongbing Xie Yingying Chen Jin Yang Chenming Liu he zhao Hongbin Cao Beijing Engineering Research Center of Process Pollution Control Division of Environment Technology and Engineering Institute of Process Engineering Chinese Academy of Sciences

In this work. phenol and oxalic acid （OA） degradation in an ozone and photocatalysis integrated process was intensively conducted with Fe3 ＋/TiO2 catalyst. The ferrioxalate complex formed between Fe3＋ and oxalate accelerated the removal of OA in the ozonation, photolysis and photocatalytic ozonation process, for its high reactivity with ozone and UV. Phenol was degraded in ozonation and photolysis with limited TOC removal rates, but much higher TOC removal was achieved in photocatalytic ozonation due to the generation of-OH. The sequence of UV light and ozone in the sequential process also influences the TOC removal, and ozone is very powerful to oxidize intermediates catechol and hydroquinone to maleic acid. Fenton or photo-Fenton reactions only played a small part in Fe3＋/TiO2 catalyzed processes, because Fe＋ was greatly reduced but not regenerated in many cases. The synergetic effect was found to be highly related with the property of the target pollutants. Fe3 ＋/TiO2 catalyzed system showed the highest ability to destroy organics, but the TiO2 catalyzed system showed little higher synergy.

关键词： Catalysis Environment Waste water Fe3 +/TiO2 Synergistic effect Photocatalytic ozonation

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添加板栗壳色素对纤维素液态地膜性能的影响

塑料科技 2024年第2期52卷 78-83页

作者：孙左玲姚先富何照云周志超姚增玉西南林业大学西南山地森林资源保育与利用教育部重点实验室云南昆明650224 西南林业大学西南地区生物多样保育国家林业与草原局重点实验室云南昆明650224

光老化影响可降解液态地膜的性能和使用寿命。黑色素是生物进化留下的高效光保护剂。文章将黑色素用于液态地膜,探讨板栗壳色素对羧甲基纤维素液态地膜性能的影响。结果表明:板栗壳色素的添加显著提高了地膜的拉伸强度,降低了地膜的断... 详细信息

光老化影响可降解液态地膜的性能和使用寿命。黑色素是生物进化留下的高效光保护剂。文章将黑色素用于液态地膜,探讨板栗壳色素对羧甲基纤维素液态地膜性能的影响。结果表明:板栗壳色素的添加显著提高了地膜的拉伸强度,降低了地膜的断裂伸长率,使膜变得疏松,孔隙增加,水蒸气透过率增大。板栗壳色素的添加还显著提高了地膜的抗氧化能力和抗紫外老化能力。板栗壳色素与羧甲基纤维素的质量比为5∶3时,液态地膜可有效减缓土壤水分蒸发,具有良好的土壤保水性能。板栗壳色素可作为一种廉价环保的可降解液态地膜光保护剂。

关键词：板栗壳色素羧甲基纤维素液态地膜抗老化紫外光保护剂

Biooxidation-thiosulfate leaching of refractory gold concentrate

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International Journal of Minerals,Metallurgy and Materials 2020年第8期27卷 1075-1082页

作者： he-fei zhao Hong-ying Yang Lin-lin Tong Qin Zhang Ye Kong Key Laboratory for Ecological Metallurgy of Multimetallic Mineral(Ministry of Education) Northeastern UniversityShenyang 110819China School of Metallurgy Northeastern UniversityShenyang 110819China

A process of biooxidation followed by thiosulfate leaching of gold from refractory gold concentrate was *** studies on the concentrate showed that very fine gold grains(<10μm)were encapsulated in pyrite and arsenopyr... 详细信息

A process of biooxidation followed by thiosulfate leaching of gold from refractory gold concentrate was *** studies on the concentrate showed that very fine gold grains(he proportion of monomer gold was only 21%.The gold-bearing sample was identified as a high-sulfur fine-sized wrapped-type refractory gold *** gold leaching efficiency obtained by direct cyanidation was only 59.86%.After biooxidation pretreatment,the sulfide minerals were almost completely decomposed,92 wt%of the mineral particles of the biooxidation residue were decreased tohe proportion of monomer gold in the biooxidation residue was over 86%.Meanwhile,the gold content in the biooxidation residue was enriched to 55.60 g/t,and the S,Fe,and As contents were reduced to approximately 19.8 wt%,6.97 wt%,and 0.13 wt%,*** thiosulfate was used for gold extraction from the biooxidation residue of the refractory gold *** results showed that the optimal reagent conditions were 0.18 M thiosulfate,0.02 M copper(II),1.0 M ammonia,and 0.24 M *** these conditions,a maximum gold leaching efficiency of 85.05%was obtained.

关键词： thiosulfate leaching gold biooxidation refractory gold concentrate process mineralogy

Sorption of ammonium and phosphate from aqueous solution by biochar derived from phytoremediation plants

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Journal of Zhejiang University-Science B(Biomedicine & Biotechnology) 2013年第12期14卷 1152-1161页

作者： Zheng ZENG Song-da ZHANG Ting-qiang LI Feng-liang zhao Zhen-li he he-ping zhao Xiao-e YANG Hai-long WANG Jing zhao Muhammad Tariq RAFIQ Ministry of Education Key Laboratory of Environmental Remediation and Ecological health College of Environmental and Resource Sciences Zhejiang University Ningbo Raw Water Group Co. Ltd. Indian River Research and Education Center Institute of Food and Agricultural Sciences University of Florida School of Environmental and Resource Sciences Zhejiang A&F University

The study on biochar derived from plant biomass for environmental applications is attracting more and more attention. Twelve sets of biochar were obtained by treating four phytoremediation plants, Salix rosthornii Seemen, Thalia dealbata, Vetiveria zizanioides, and Phragmites sp., sequentially through pyrolysis at 500 °C in a N2 environment, and under different temperatures(500, 600, and 700 °C) in a CO2 environment. The cation exchange capacity and specific surface area of biochar varied with both plant species and pyrolysis temperature. The magnesium(Mg) content of biochar derived from T. dealbata(TC) was obviously higher than that of the other plant biochars. This biochar also had the highest sorption capacity for phosphate and ammonium. In terms of biomass yields, adsorption capacity, and energy cost, T. dealbata biochar produced at 600 °C(TC600) is the most promising sorbent for removing contaminants(N and P) from aqueous solution. Therefore, T. dealbata appears to be the best candidate for phytoremediation application as its biomass can make a good biochar for environmental cleaning.

关键词： Biochar Nutrient removal Plant species Pyrolysis temperature Water quality

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两种造礁石珊瑚固碳能力初步研究

热带海洋学报 2024年第3期43卷 146-154页

作者：赵贺张峻菱王浩柯景召朱铭王爱民李秀保南海海洋资源利用国家重点实验室(海南大学) 海南海口570228 海南大学生态与环境学院海南海口570228 海南大学海洋生物与水产学院海南海口570228

珊瑚礁是海洋中生产力水平最高的生态系统之一,其碳循环受珊瑚光合作用、呼吸作用和钙化作用三大代谢过程的共同调节,过程十分复杂。为探明珊瑚固碳能力,明确其在光照和黑暗下固碳能力的变化过程,本研究以取自三亚蜈支洲岛健康风信子鹿... 详细信息

珊瑚礁是海洋中生产力水平最高的生态系统之一,其碳循环受珊瑚光合作用、呼吸作用和钙化作用三大代谢过程的共同调节,过程十分复杂。为探明珊瑚固碳能力,明确其在光照和黑暗下固碳能力的变化过程,本研究以取自三亚蜈支洲岛健康风信子鹿角珊瑚(Acropora hyacinthus)和丛生盔形珊瑚(Galaxea fascicularis)为研究对象,基于碳酸盐体系分析方法,通过设置光照、黑暗两种处理方式,测定试验前后水体理化因子变化,并根据CO_(2)体系计算软件得出水体溶解无机碳(dissolved inorganic carbon,DIC)和二氧化碳分压(partial pressure of carbon dioxide,pCO_(2))含量。结果显示:在光照条件下,两种珊瑚所处水体总碱度(total alkalinity,TA)和酸碱度(pH)下降,水温和溶解氧(dissolved oxygen,DO)上升,DIC和CO_(2)被持续消耗,产生碳汇效应;黑暗条件下,水体TA、pH和温度上升,DO下降,DIC和CO_(2)持续释放,产生碳源效应;比较光暗处理结果后,计算得出风信子鹿角珊瑚固碳率为0.00576mol··m^(-2)·h^(-1);丛生盔形珊瑚固碳率为0.00022mol··m^(-2)·h^(-1),风信子鹿角珊瑚固碳效率显著高于丛生盔形珊瑚(P<0.05);两种珊瑚光合作用吸收CO_(2)的量大于自身所产生的,属于CO_(2)的汇。综上所述,两种珊瑚最终降低了水体TA、DIC和pCO_(2),能够促进大气CO_(2)向海水转移,形成碱度汇和碳汇效应。

关键词：风信子鹿角珊瑚丛生盔形珊瑚溶解无机碳固碳能力

新一代人工晶状体计算公式对高度近视行前后段联合手术的准确性分析

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陆军军医大学学报 2024年第13期46卷 1545-1552页

作者：陶亮陈旭万超赵赫吴龙旺陶醉吴楠刘玺刘勇陆军军医大学(第三军医大学)第一附属医院眼科重庆400038

目的探究新一代人工晶状体(intraocular lens,IOL)计算公式及Wang-Koch(WK)眼轴校正公式在接受前后段联合手术的高度近视患者中的准确性。方法收集2015年6月至2021年6月于陆军军医大学第一附属医院眼科接受前后段联合手术且眼轴(axial l... 详细信息

目的探究新一代人工晶状体(intraocular lens,IOL)计算公式及Wang-Koch(WK)眼轴校正公式在接受前后段联合手术的高度近视患者中的准确性。方法收集2015年6月至2021年6月于陆军军医大学第一附属医院眼科接受前后段联合手术且眼轴(axial length AL)>26 mm的患者100例(100眼)。分别采用Barrett UniversalⅡ(BUⅡ)、Emmetropia Verifying Optical(EVO)、Kane、Haigis、Hoffer Q、Holladay 1、SRK/T、第一代线性WK眼轴优化公式(Haigis-WK1,SRK/T-WK1,Hoffer Q-WK1,Holladay 1-WK1)及第二代线性WK眼轴优化公式(SRK/T-WK2,Holladay 1-WK2)等13种公式计算IOL屈光度。获得各IOL屈光度公式的平均预测误差(mean prediction error,ME)、平均绝对误差(mean absolute error,MAE)、中位绝对误差(median absolute error,MedAE)及预测误差在不同屈光阈的百分比,以评价各公式的准确性。将所有患者根据眼轴长度分组:26.00 mm30.00 mm者为C组(34眼),以探究眼轴长度对IOL屈光度计算的影响。根据术前眼内填充物,将患者分为硅油眼组(63眼)和非硅油眼组(37眼),比较术前眼内填充物对IOL屈光度计算的影响。结果新一代IOL公式(BUⅡ、EVO及Kane)的MedAE(0.34D、0.31D、0.35D)显著低于传统公式(P<0.05),而且预测误差在±0.25 D、±0.50 D、±0.75 D及±1.00 D范围内的百分比显著高于传统公式(P<0.05)。传统公式均出现远视偏移(0.35~0.65 D),WK眼轴调整法可以矫正传统公式的远视偏移。WK2可以提高SRK/T和Holladay 1公式的计算准确性,且SRK/T-WK2和Holladay 1-WK2公式的MedAE与新一代IOL公式差异无统计学意义。比较各公式在不同眼轴分组的MedAE,发现新一代IOL公式(BUⅡ、Kane和EVO)及WK校正眼轴公式(Haigis-WK1、SRK/T-WK1、SRK/T-WK2、Hoffer Q-WK1、Holladay 1-WK1和Holladay 1-WK2)在眼轴分组间均差异无统计学意义;传统公式的MedAE在眼轴分组间均存在显著差异(P<0.01),其中C组的MedAE均最大(Haigis:0.84 D,SRK/T:1.10 D,Hoffer Q:1.23 D,Holladay 1:1.20 D)。比较各公式在不同术前眼内填充物分组的MedAE,结果发现,新一代IOL公式(BUⅡ、Kane和EVO)、Haigis及SRK/T公式在硅油眼组的MedAE均显著高于非硅油眼组(P<0.05)。结论在接受前后段联合手术的高度近视患者中,新一代IOL公式和第二代线性WK眼轴校正公式的准确性和稳定性显著优于传统公式。

关键词：高度近视前后段联合手术人工晶状体屈光预测误差计算公式

Study on a semi-resolved CFD-DEM method for rod-like particles in a gas-solid fluidized bed

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Particuology 2024年第4期87卷 20-36页

作者： Liping he Zhengxian Liu Yongzhi zhao Department of Mechanics School of Mechanical EngineeringTianjin UniversityTianjin300350China Insttute of Process quipment College of Energy EngineeringZhejiang UniversityHangzhou30027China

Based on a semi-resolved CFD-DEM coupling method,this study proposed a method that uses the minimum distance between the fluid grid and the particle boundary as a reference value to determine the degree of influence of the target fluid grid on the particle's drag force.A fluidized bed of rod-like particles was chosen as a typical case to investigate the effect of different fluid grid scales on various fluidized bed characteristic *** calculation performance of the semi-resolved and unre-solved CFD-DEM coupling algorithm on key fluidized bed characteristic parameters such as average pressure drop,particle frequency distribution with bed height,and particle orientation distribution were *** was found that the semi-resolved CFD-DEM coupling algorithm gradually obtained results with higher consistency with decreasing fluid grid scale for key parameters such as particle frequency distribution with bed height,particle orientation distribution,and time-history mixing index,exhibiting a phenomenon similar to grid independence in fluid *** comparing with experimental results,it was verified that the semi-resolved CFD-DEM coupling algorithm can be applied to simulate multi-granular gas-solid systems with fluid grid scales equivalent to particle *** algorithm solves the limitation of fluid grid scale in the unresolved CFD-DEM coupling framework and improves the grid adaptability of the CFD-DEM coupling simulation algorithm.

关键词： CFD-DEM Semi-resolved method Fluid-solid flow Non-spherical particle Fluidized bed

Investigations into the coiled tubing partial underbalanced drilling (CT-PUBD)technique for drilling hard formations

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Petroleum Science 2018年第4期15卷 830-840页

作者： Huai-Zhong Shi zhao-Sheng Ji he-Qian zhao heng-Yu Song Zhen-Liang Chen State Key Laboratory of Petroleum Resources and Prospecting Beijing 102249China College of Petroleum Engineering China University of Petroleum (Beijing)Beijing 102249China

To improve the rate of penetration(ROP) in drilling deep and hard formations, this paper proposes a new drilling method called coiled tubing partial underbalanced drilling(CT-PUBD). As a preliminary investigation into the new drilling method, this paper presents predictions of hole cleaning efficiency, drilling speed, cuttings migration and pressure loss in the drilling process with CT-PUBD. Based on numerical simulation and full-scale experimental studies, we conclude that using CT-PUBD, an underbalanced drilling condition can be achieved near the bit while maintaining wellbore safety at the same time. This condition can be achieved using a cuttings discharge device, a rotary packer and a backflow *** to the numerical simulations performed in this study, CT-PUBD can achieve high efficiency of hole *** the cuttings migration process, the fluid velocities can reach the maximum values in the backflow holes. A full-scale laboratory experimental system was used to test the hydraulic characteristics and obtain the drilling performance of the new technology. The result shows that CT-PUBD significantly improves the ROP compared to the conventional drilling method.

关键词： Partial underbalanced drilling Coiled tubing Flow fields Cuttings removal Rate of penetration(ROP)

Edible insects in China： Utilization and prospects

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Insect Science 2018年第2期25卷 184-198页

作者： Ying Feng Xiao-Ming Chen Min zhao zhao he Long Sun Cheng-Ye Wang Wei-Feng Ding Research Institute of Resource Insects Chinese Academy of Forestry Kunming China

The use of edible insects has a long history in China, where they have been consumed for more than 2000 years. In general, the level of acceptance is high for the consumption of insects in China. Many studies on edible insects have been conducted in the last 20 years, and the scope of the research includes the culture ofentomophagy and the identification, nutritional value, farming and breeding of edible insects, in addition to food production and safety. Currently, 324 species of insects from 11 orders are documented that are either edible or associated with entomophagy in China, which include the common edible species, some less commonly consumed species and some medicinal insects. How- ever, only approximately 10 to 20 types of insects are regularly consumed. The nutritional values for 174 species are available in China, including edible, feed and medicinal species. Although the nutritional values vary among species, all the insects examined contain pro- tein, fat, vitamins and minerals at levels that meet human nutritional requirements. Edible insects were, and continue to be, consumed by different ethnic groups in many parts of China. People directly consume insects or food products made from insects. The processing of products from insect protein powder, oil and chitin, and the development of healthcare foods has been studied in China. People also consume insects indirectly by eating livestock that were fed insects, which may be a more acceptable pathway to use insects in human diets. Although limited, the data on the food safety of insects indicate that insects are safe for food or feed. Incidences of allergic reactions after consuming silkworm pupae, cicadas and crickets have been reported in China. Insect farming is a unique breeding industry in rural China and is a source of income for local people. Insects are reared and bred for human food, medicine and animal feed using two approaches in China： the insects are either fully domesticated and reared comple

关键词： edible insects entomophagy nutritive value insect food safety insectfarming

The chlorine evolution reaction promoted by organocatalysts with amide functional groups

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Science China Chemistry 2024年第3期67卷 749-750页

作者： Lan zhao Liang-Nian he State Key Laboratory and Institute of Elemento-Organic Chemistry College of ChemistryNankai UniversityTianjin 300071China

Since the nineteenth century, the chlor-alkali process entails the electrochemical oxidation of sodium chloride solutions to Cl_(2) by the chlorine evolution reaction(CER) and the simultaneous production of sodium hyd... 详细信息

关键词： chlorine hydroxide promoted