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Synergistic effects of chemical additives and mature compost on reducing H_2S emission during kitchen waste composting

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Journal of Environmental sciences 2024年第5期139卷 84-92页

作者： Yongdi Liu Haihou Wang Hao Zhang Yueyue Tao Rui Chen Sheng Hang Xiaoyan Ding Meidi Cheng Guochun Ding Yuquan Wei Ting Xu Ji Li College of Resources and Environmental science Beijing Key Laboratory of Biodiversity and Organic FarmingChina Agricultural UniversityBeijing 100193China Organic Recycling Institute(Suzhou)of China agricultural University Wuzhong DistrictSuzhou 215128China Suzhou Academy of agricultural sciences Institute of Agricultural Sciences in Taihu Lake DistrictSuzhou 215155China Technical Centre for soil Agriculture and Rural Ecology and EnvironmentMinistry of Ecology and EnvironmentBeijing 100012China College of chemistry and Chemical Engineering Yantai UniversityYantai 264005China

Additives could improve composting performance and reduce gaseous emission,but few studies have explored the synergistic of additives on H_(2)S emission and compost *** research aims to make an investigation about the effects of chemical additives and mature compost on H_(2)S emission and compost maturity of kitchen waste *** results showed that additives increased the germination index value and H_(2)S emission reduction over 15 days and the treatment with both chemical additives and mature compost achieved highest germination index value and H_(2)S emission reduction(85%).Except for the treatment with only chemical additives,the total sulfur content increased during the kitchen waste *** proportion of effective sulfur was higher with the addition of chemical additives,compared with other *** relative abundance of H_(2)S-formation bacterial(Desulfovibrio)was reduced and the relative abundance of bacterial(Pseudomonas and Paracoccus),which could convert sulfur-containing substances and H_(2)S to sulfate was improved with *** the composting process with both chemical additives and mature compost,the relative abundance of Desulfovibrio was lowest,while the relative abundance of Pseudomonas and Paracoccus was *** together,the chemical additives and mature compost achieved H_(2)S emission reduction by regulating the dynamics of microbial community.

关键词： Kitchen waste composting Sulfur conversion Chemical additives Mature compost Microbial community

One-dimensional (1D) europium coordination polymer wires:Synthesis,characterization and photoluminescence properties

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Journal of Rare Earths 2010年第S1期28卷 106-110页

作者：罗龙飞徐蓉赵东钟声亮 College of chemistry and Chemical Engineering Jiangxi Normal University division of Nanomaterials and chemistry Hefei National Laboratory for Physical Sciences at MicroscaleUniversity of Science and Technology of China

1D europium coordination polymer wires were successfully prepared by reacting europium chloride with tributyl phosphate(TBP) at 160 oC for 12 h. The products were characterized by XRD,IR,TG,DTA,SEM,and EDS. SEM results showed that the wires were with diameters ranging from several hundreds of nanometers to ～5 μm and lengths going up to several hundreds of micrometers. Influencing factors such as the dosage of reactants and reaction time on the preparation were systematically investigated. Strong emission centering at 590 nm was realized in the coordination polymer wires on excitation at 395 nm.

关键词： one dimensional solvothermal synthesis europium coordination polymer rare earths

Characterization of solid particles sampled from condensates in boiling water reactor

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Nuclear science and Techniques 2016年第2期27卷 141-148页

作者： Yu-Hung Shih Tung-Jen Wen Liang-Cheng Chen Tsuey-Lin Tsai chemistry division Institute of Nuclear Energy Research

The growth, activation and deposition of corrosion products are the primary sources of radiation buildup on the surface of out-of-core piping in nuclear power plants. The buildup of radiation can have negative effects on the performance of the facility and cause harm to staff during maintenance outages for refueling. This paper reports on the crystalline and amorphous structures of corrosion products sampled in the boiling water reactors in nuclear power plants of Kuo-Sheng and identified using an acid dissolving technique. X-ray diffraction, scanning electron microprobe and inductively coupled plasmaatomic emission spectroscopy were used to analyze the samples. The results indicate that the quantity of amorphous iron oxide at inlet of the condensate demineralizer in Unit 2 is higher than that in Unit 1. The proportion of crystalline to amorphous corrosion products can affect the efficiency of removal. Thus, these results can be used to explain the difference in removal efficiency of condensate demineralizers in different units. Moreover, the iron oxide structures with various properties were observed in different operational periods. It is probable that the higher proportion of amorphous structures with a smaller particle size would reduce efficiency in the removal of condensate demineralization in Unit 2.

关键词：沸水反应堆电感耦合等离子体原子发射光谱法固体颗粒采样无定形结构表征凝聚腐蚀产物

N-heterocyclic carbene-catalyzed arene formation reactions

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science China chemistry 2022年第2期65卷 210-223页

作者： Tingting Li Zhichao Jin Yonggui Robin Chi State Key Laboratory Breeding Base of Green Pesticide and agricultural Bioengineering Key Laboratory of Green Pesticide and Agricultural BioengineeringMinistry of EducationGuizhou UniversityGuiyang 550025China division of chemistry&Biological chemistry School of Physical&Mathematical SciencesNanyang Technological UniversitySingapore 637371Singapore

N-heterocyclic carbene-catalyzed reactions for the formation of aromatic compounds are *** reactions are subdivided into 4 types based on their activation modes.A brief summary on the achievements and the challenges remaining in Nheterocyclic carbene(NHC)-catalyzed arene construction processes is provided at the end of this *** outlook into the future research direction within this field is also given based on our own opinion and knowledge on the trends of the development of NHC organocatalysis.

关键词： N-heterocyclic carbene arene construction cycloaddition organocatalysis

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Characteristics of La-modified Ni-Al_2O_3 and Ni-SiO_2 catalysts for CO_x-free hydrogen production by catalytic decomposition of methane

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Journal of Energy chemistry 2013年第6期22卷 853-860页

作者： Chatla Anjaneyulu Velisoju Vijay Kumar Suresh K.Bhargava Akula Venugopal Inorganic & Physical chemistry division CSIR-Indian Institute of Chemical Technology College of science Engineering and Health Advanced Materials & Industrial Chemistry School of Applied Sciences RMIT University

Hydrotalcite precursors of La modified Ni-Al2O3 and Ni-SiO2 catalysts prepared by co-precipitation method and the catalytic activities were examined for the production of COx-free H2 by CH4 decomposition. Physico-chemical characteristics of fresh, reduced and used catalysts were evaluated by XRD, TPR and O2 pulse chemisorptions, TEM and BET-SA techniques. XRD studies showed phases due to hydrotalcite-like precursors in oven dried form produced dispersed NiO species upon calcination in static air above 450 C. Raman spectra of deactivated samples revealed the presence of both ordered and disordered forms of carbon. Ni-La-Al2O3catalyst with a mole ratio of Ni : La : Al = 2 : 0.1 : 0.9 exhibited tremendously high longevity with a hydrogen production rate of 1300 molH2 mol 1 Ni. A direct relationship between Ni metal surface area and hydrogen yields was established.

关键词： CH4 decomposition Ni-La-Al hydrotalcite Ni metal surface area COx-free H2

Recent progress in structural modulation of metal nanomaterials for electrocatalytic CO_(2) reduction

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Rare Metals 2021年第6期40卷 1412-1430页

作者： Chen-Huai Yang Farhat Nosheen Zhi-Cheng Zhang Tianjin Key Laboratory of Molecular Optoelectronic sciences Department of ChemistrySchool of ScienceTianjin University&Collaborative Innovation Center of Chemical Science and EngineeringTianjin 300072China Department of chemistry Division of Science and TechnologyUniversity of EducationLahore 54660Pakistan

The electrochemical CO_(2) reduction(ECR)into value-added products presents an appealing approach to mitigate CO_(2) emission caused by excess consumption of fossil *** obtain high catalytic activity and selectivity toward target product in ECR,designing and developing a stable and efficient electrocatalyst is of significant *** date,metal nanomaterials have been widely applied as electrocatalysts for ECR due to their unique physicochemical *** structural modulation of metal nanomaterials is an attractive strategy to improve the catalytic *** this review,the recent progress of structural modulation,including size,facet,grain boundary,composition,interface,ligand modification,and crystal phase,is systematically summarized from both theoretical and experimental ***,the opportunities and perspectives of structural modulation of metal nanomaterials for ECR are proposed.

关键词： CO_(2)reduction Structural modulation Electrocatalysis Metal nanomaterial Crystal phase

Biogeochemical reductive release of soil embedded arsenate around a crater area (Guandu) in northern Taiwan using X-ray absorption near-edge spectroscopy

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Journal of Environmental sciences 2013年第3期25卷 626-636页

作者： Kai-Ying Chiang Tsan-Yao Chen Chih-Hao Lee Tsang-Lang Lin Ming-Kuang Wang Ling-Yun Jang Jyh-Fu Lee Department of agricultural chemistry "National" Taiwan University Department of Engineering and System science "National" Tsing Hua University "National" Synchrotron Radiation Research Center

This study investigates biogeochemical reductive release of arsenate from beudantite into solution in a crater area in northern Taiwan,using a combination of X-ray absorption near-edge structure （XANES） and atomic absorption *** arsenic （As） concentrations in the soil were more than 200 mg/*** four months of laboratory experiments,less than 0.8% As was released into solution after reduction *** 71% to 83% As was chemically reduced into arsenite （As（III）） and partially weathering into the soluble *** kinetic dissolution and re-precipitation of As,Fe,Pb and sulfate in this area of paddy soils merits further study.

关键词： agricultural rice soils arsenic arsenate reduction release

Selective oxidation mediated synthesis of unique SexTey nanotubes, their assembled thin films and photoconductivity

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Nano Research 2018年第2期11卷 665-675页

作者： Yuan Yang Guo-Qiang Liu Min-Rui Gao Yu Xia Shu-Hong Yu division of Nanomaterials and chemistry Hefei National Laboratory for Physical Sciences at the Microscale Collaborative Innovation Centre of Suzhou Nano Science and Technology CAS Centre for Excellence in Nanoscience Department of Chemistry Hefei Science Centre of CAS University of Science and Technology of China Hefei China

One-dimensional hollow nanostructures have potential applications in many fields and can be fabricated using various methods. Herein, a selective-oxidation route for the synthesis of unique SexTey nanotubes （STNTs） with a controlled morphology using TexSey@Se core-shell nanowires （TSSNWs） as a template is reported. Because of the lower redox potential of TeO2/Te compared to that of H2SeO3/Se, the Te in TSSNWs can be preferentially oxidized by an appropriate oxidant of HNO2 to form STNTs. The inner diameters and wall thicknesses of the STNTs can be tuned by modulating the core diameters and shell thicknesses of the TSSNWs, respectively. The STNTs can be assembled into a monolayer composed of well-arranged nanotubes using the Langmuir-Blodgett technique. A device based on films stacked with 10 STNT monolayers was fabricated to investigate the photocoductivity of the STNTs. The STNTs exhibited a good photoresponse over the whole ultraviolet-visible spectrum, revealing their votential for application in ovtoelectronic devices.

关键词： selective oxidation core-shell nanowires nanotubes assembled thin films photoconductivity

COMPARATIVE STUDY ON RESIDUAL EFFECTS OF ORGANIC AND INORGANIC FERTILIZER NITROGEN IN WATERLOGGED soil AND DRYLAND soil

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science China chemistry 1983年第2期26卷 167-173页

作者：黄东迈朱培立高家骅 Jiangsu Academy of agricultural sciences Nanjing Institute of soil and Fertilizer

The balance of residual fertilizer nitrogen was studied with the application of crotalariaand ammonium sulfate in two opposite cropping sequences —rice-wheat-rice-wheat and wheatrice-wheat-rice. Air-dried plant of crotalaria tagged with(NH)SOand containing 6.5% ofN in total nitrogen was used as the sources ofN labelled organic manure. Ammonium sulfate tagged with 10.6%N was applied as inorganic *** recovery rate of residual fertilizer N was very low, averaging only 2.5%+2% on the basis of applied fertilizer N, in the case of rice as well as wheat in each successive cropping season. After the harvest of the first crop, more fertilizer nitrogen was immobilized as residual form in dryland soil than in waterlogged soil. The percentage of cumulative uptake of fertilizer N in rice-wheat-rice-wheat cropping sequence was much greater than that in the wheat-rice-wheat-rice sequence. It might be more economical to apply this kind of manure as basal dressing first to rice.

关键词： COMPARATIVE STUDY ON RESIDUAL EFFECTS OF ORGANIC AND INORGANIC FERTILIZER NITROGEN IN WATERLOGGED soil AND DRYLAND soil