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Potential Benefits of Biochar in Agricultural Soils:A Review

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Pedosphere 2017年第4期27卷 645-661页

作者： DING Yang LIU Yunguo LIU Shaobo HUANG Xixian LI Zhongwu TAN Xiaofei zeng guangming ZHOU Lu College of Environmental Science and Engineering Hunan UniversityChangsha 410082China Key Laboratory of Environmental Biology and Pollution Control(Hunan University) Ministry of EducationChangsha 410082China School of Architecture and Art Central South UniversityChangsha 410082China School of Metallurgy and Environment Central South UniversityChangsha 410083China School of Hydraulic Engineering Changsha University of Science and TechnologyChangsha 410004China

Soil degradation,characterized by declines in nutrient status and simultaneous accumulation of pesticide residues,is a major problem affecting agricultural *** studies indicate that biochar application to soil has promise as a practical method to alleviate these pressures:increasing crop yield and enhancing pesticide ***,we review the roles of biochar in both chemical and biological promotion of pesticide degradation and the potential benefits of biochar relating to the efficiency of fertilizer use,availability of nutrients,and nutrient *** typically has a high surface area featuring many functional groups,a high cation exchange capacity,and high *** factors that impact on the nutrient retention characteristics of biochar(e.g.,feedstock,pyrolysis temperature,and application rate) are also discussed ***,more studies of the long-term impacts on soil properties from biochar addition are still required before it can be possible to accurately quantify the sustainability of this approach to sequester carbon and restore soil function.

关键词： biodegradation, chemical degradation, crop yield, feedstock, nutrient, pesticide, pollution, pyrolysis temperature

Numerical simulation for volatile organic compound removal in rotating drum biofilter

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Chinese Science Bulletin 2007年第16期52卷 2184-2189页

作者： CHEN Hong YANG ChunPingt zeng guangming YU KongLiang QU Wei YU GuanLong MENG Lei College of Environmental Science and Engineering Hunan University Changsha 410082 China

Rotating drum biofilters (RDBs) could effectively remove volatile organic compounds (VOCs) from waste gas streams. A mathematical model was developed on the basis of mass transport and mass balance equations in an RDB,the two-film theory,and the Monod kinetics. This model took account of mass transfer and biodegradation of VOC in the gas-water-biofilm three-phase system in the biofilter,and could simulate variations of VOC removal efficiency with a changing specific surface area and porosity of the media due to the increasing of biofilm thickness in the biofilter. Toluene was used as a model VOC. This model was further simplified by introducing a coefficient of the gas velocity and ne-glecting the water phase due to the complexity of operating conditions. The equations for the biofilm phase,gas phase,and biofilm accumulation in this model were solved using collocation method,ana-lytic method,and the Runge-Kutta method separately. A computer program was written down as MATLAB to solve this model. Results of numerical solutions showed that toluene removal efficiency in the RDB increased and reached the maximum values of 97% on day 4 after the startup,and then de-creased and remained at 90% after 5 more days of operation. Toluene concentration was high at the outermost layer where more than 70% toluene was removed,and was low at the innermost layer where less than 10% toluene was removed. The dynamic removal efficiencies from this model correlated reasonably well with experimental results for toluene removal in a multi-layered RDB.

关键词：生物降解生物薄膜数值模拟易挥发有机化合物生物过滤器废气处理

Adsorption of 17β-estradiol from aqueous solution by raw and direct/pre/post-KOH treated lotus seedpod biochar

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Journal of Environmental Sciences 2020年第1期32卷 10-23页

作者： Ni Liu Yunguo Liu guangming zeng Jilai Gong Xiaofei Tan Jun Wen Shaobo Liu Luhua Jiang Meifang Li Zhihong Yin College of Environmental Science and Engineering Hunan UniversityChangsha 410082P.R.China Key Laboratory of Environmental Biology and Pollution Control Hunan UniversityMinistry of EducationChangsha 410082China College of Agriculture Guangxi UniversityNanning 530005China School of Architecture and Art Central South UniversityChangsha 410082China School of Metallurgy and Environment Central South UniversityChangsha 410083China

Five biochars derived from lotus seedpod(LSP)were applied to examine and compare the adsorption capacity of 17β-estradiol(E2)from aqueous *** effect of KOH activation and the order of activation steps on material properties were *** effect of contact time,initial concentration,p H,ionic strength and humic acid on E2 adsorption were investigated in a batch adsorption *** results demonstrated that the pseudo second-order model fitted the experimental data best and that adsorption equilibrium was reached within 20 *** efficiency of E2 removal increased with increasing E2 concentration and decreased with the increase of ionic strength.E2 adsorption on LSP-derived biochar(BCs)was influenced little by humic acid,and slightly affected by the solution p H when its value ranged from 4.0 to 9.0,but considerably affected at p H *** environmental temperature is favorable for E2 ***,π–πinteractions,monolayer adsorption and electrostatic interaction are the possible adsorption *** studies indicated that KOH activation and the order of activation steps had significant impacts on the ***-treated biochar exhibited better adsorption capacity for E2 than direct treated,pretreated,and raw LSP *** biochar at higher temperature improved E2 *** excellent performance of BCs in removing E2 suggested that BCs have potential in E2 treatment and that the biochar directly treated by KOH would be a good choice for the treatment of E2 in aqueous solution,with its advantages of good efficiency and simple technology.

关键词： 17β-estradiol Lotus seedpod derived biochar Activation order Pre-or post-treatment Adsorption

Growth inhibition and oxidative damage of Microcystis aeruginosa induced by crude extract of Sagittaria trifolia tubers

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Journal of Environmental Sciences 2016年第5期28卷 40-47页

作者： Jiang Li Yunguo Liu Pingyang Zhang guangming zeng Xiaoxi Cai Shaobo Liu Yicheng Yin Xinjiang Hu Xi Hu Xiaofei Tan College of Environmental Science and Engineering Hunan University Changsha 410082 China. Key Laboratory of Environmental Biology and Pollution Control (Hunan University) Ministry of Education Changsha 410082 China School of Architecture and Art Central South University Changsha 410082 China School of Metallurgy and Environment Central South University Changsha 410083 China College of Environmental Science and Engineering Research Central South University of Forestry and Technology Changsha 410004 China Hunan East Dongting Lake National Nature Reserve Administration Yueyang 414000 China

Aquatic macrophytes are considered to be promising in controlling harmful cyanobacterial blooms. In this research, an aqueous extract of Sagittaria trifolia tubers was prepared to study its inhibitory effect on Microcystis aeruginosa in the laboratory. Several physiological indices of M. aeruginosa, in response to the environmental stress, were analyzed. Results showed that S. trifolia tuber aqueous extract significantly inhibited the growth of M. aeruginosa in a concentration-dependent way. The highest inhibition rate reached 90% after 6 day treatment. The Chlorophyll-a concentration of M. aeruginosa cells decreased from 343.1 to314.2 μg/L in the treatment group. The activities of superoxide dismutase and peroxidase and the content of reduced glutathione in M. aeruginosa cells initially increased as a response to the oxidative stress posed by S. trifolia tuber aqueous extract, but then decreased as time prolonged. The lipid peroxidation damage of the cyanobacterial cell membranes was reflected by the malondialdehyde level, which was notably higher in the treatment group compared with the controls. It was concluded that the oxidative damage of M. aeruginosa induced by *** tuber aqueous extract might be one of the mechanisms for the inhibitory effects.

关键词： Microcystis aeruginosa Sagittaria trifolia Cyanobacterial inhibition Oxidative damage Antioxidant response

神经内镜锁孔开颅清除急性外伤性硬膜下血肿的疗效分析

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中华神经外科杂志 2023年第11期39卷 1110-1114页

作者：郑鹏锋曾广明陈昱福建医科大学省立临床医学院福州350001 福建省立医院南院神经外科福州350028 福建省立医院南院骨科福州350028

目的探讨神经内镜锁孔开颅治疗急性外伤性硬膜下血肿的有效性和安全性。方法回顾性分析2016年1月至2022年1月福建省立医院南院神经外科手术治疗的40例急性外伤性硬膜下血肿患者的临床资料。其中20例采用神经内镜锁孔开颅血肿清除术(微创... 详细信息

目的探讨神经内镜锁孔开颅治疗急性外伤性硬膜下血肿的有效性和安全性。方法回顾性分析2016年1月至2022年1月福建省立医院南院神经外科手术治疗的40例急性外伤性硬膜下血肿患者的临床资料。其中20例采用神经内镜锁孔开颅血肿清除术(微创组),20例采用传统大骨瓣开颅手术治疗(传统组)。两组患者性别、年龄、术前硬膜下血肿量等基线资料的差异均无统计学意义(均P>0.05),具有可比性。分析比较两组患者的手术情况(包括手术时长及术中出血量等)、术后1 d格拉斯哥昏迷评分(GCS)、术后并发症及术后6个月格拉斯哥预后分级(GOS)。结果两组患者均顺利完成手术,微创组术中无一例扩大手术。与传统组比较,微创组的手术时长较短[分别为(73.8±6.7)min、(138.3±16.8)min,t=15.92]、术中出血量较少[分别为(26.7±4.7)ml、(96.5±13.1)ml,t=22.46]、术后血肿残余量较少[分别为(3.5±1.3)ml、(7.6±2.6)ml,t=6.24]、住院时长较短[分别为(10.3±2.9)d、(13.8±3.2)d,t=3.71],差异均具有统计学意义(均P0.05)。术后6个月,所有患者的GOS均为Ⅴ级,两组比较差异无统计学意义(P=1.000)。结论与传统大骨瓣开颅手术比较,采用神经内镜锁孔开颅手术治疗急性外伤性硬膜下血肿可缩短手术和住院时长,减少术中出血和血肿残留,而并发症发生比例和预后情况相近,是一种安全、有效、微创的方法。

关键词：血肿,硬膜下,急性创伤和损伤神经内窥镜最小侵入性外科手术

Periodic disorder of the world will not impede its major trend of development

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Voice of Friendship 2021年第2期 13-16页

作者： zeng guangming 不详

On March 26,CPAFFC President Lin Songtian delivered a keynote speech at the China-Japan Business Cooperation Conference—China(Wuxi)-Japan business cooperation in the context of the RCEP held in Wuxi,Jiangsu *** roughly 70 participants at the event included President Bai Suning of the Jiangsu Provincial People’s Association for Friendship with Foreign Countries.

关键词： RCEP trend Jiangsu

Leaders of people-to-people friendship organizations from China and Japan meet online, and issue a joint declaration on solidarity and cooperation, opposing politicizing of novel coronavirus

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Voice of Friendship 2021年第3期 44-46页

作者： zeng guangming 不详

On the afternoon of July 19, Lin Songtian, president of the Chinese People’s Association for Friendship with Foreign Countries;Cheng Yonghua, executive vice president of the China-Japan Friendship Association.

关键词： Japan cooperation president

Old friend from Japan visits China amid fragrance of acacia flower

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Voice of Friendship 2018年第3期 23-24页

作者： zeng guangming 不详

He is a rigorous,pragmatic,wiseand rational Japanese *** is both a veteran politician in Japan and'an old friend of Chinese people',as Chinese President Xi Jinping called him,who has been committed to China-Japan friendly exchanges and cooperation for *** is Toshihiro Nikai,the current secretary-general of the Liberal Democratic Party of Japan.

关键词： Old friend Japan China

Cherry Blossom Yet to Bloom——Notes on 2013 Chinese University Student Delegation’s Visit to Japan

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Voice of Friendship 2013年第2期 40-42页

作者： zeng guangming Japanese Department of Beijing Foreign Studies University

Words such as soft, gentle and elegant are used to describe Japanese cherry blossoms. When tens of thousands of flowers are in full bloom and their pedals shower down, it not only shows the flourishing of Spring but also the vanishing of a momentary beauty. China and Japan have experienced ups and downs in their relationship since the two countries

关键词： Bloom Student Notes Japanese disaster experienced