Advances in Applied Chemistry and Industrial Catalysis: Proceedings of the 3rd International Conference on Applied Chemistry and Industrial Catalysis (ACIC 2021), Qingdao, China, 24-26 December 2021

Description

Presenting a collection of papers resulting from the conference on "Applied Chemistry and Industrial Catalysis (ACIC 2021), Qingdao, China, 24-26 December 2021". The theme of the conference was: "Clean Production and High Value Utilization", discussing how to reduce the environmental footprint at the source and produce high value-added end products in chemical manufacturing. The conference brought together scholars from the Chinese government, top universities, business associations, research centers and high-tech enterprises, and was committed to building and enabling a platform for the cooperation among the Chinese government, Chemical industry, and scholars. The goal was to build a bridge between R&D results and the Chemical industry. The conference conducted in-depth exchanges and discussions on relevant topics such as applied chemistry and industrial catalysis aiming to provide an academic and technical communication platform for scholars and engineers engaged in scientific research and engineering practice in the field of chemistry, catalysis and function material. By sharing the research status of scientific research achievements and cutting-edge technologies, it helps scholars and engineers all over the world comprehend the academic development trend and broaden research ideas. So as to strengthen international academic research, academic topics exchange and discussion, and promote the industrialization cooperation of academic achievements. Cover Table of contents Preface Committee member Applied chemistry and chemical analysis techniques Optimal analysis of C4 olefin preparation by ethanol coupling under the influence of multiple factors 1 INTRODUCTION 2 BACKGROUND AND REACTION MECHANISM 4 SOLUTION OF OPTIMAL COUPLING REACTION CONDITIONS 5 CONCLUSION ACKNOWLEDGEMENT REFERENCES Study on the extraction of grape seed oil by supercritical carbon dioxide 1 INTRODUCTION 2 METHODOLOGY 3 RESULTS AND DISCUSSION 4 CONCLUSION REFERENCES Research progress of preservatives in cosmetics and their detection techniques 1 INTRODUCTION 2 NECESSITY FOR PRESERVATIVE DETECTION IN COSMETICS 3 CONVENTIONAL DETECTION METHODS FOR PRESERVATIVES IN COSMETICS 4 INSTRUMENT COMBINED DETECTION METHOD FOR PRESERVATIVES INCOSMETICS 5 CONCLUSION REFERENCES Determination of four acrylates in food packaging paper via high performance liquid chromatography 1 INSTRUCTIONS 2 EXPERIMENTAL AND METHODS 3 RESULTS AND DISCUSSION 4 CONCLUSION FUNDING REFERENCES Influence of pH on efficient removal of naproxen from water 1 INTRODUCTION 2 REMOVAL TECHNOLOGY OF NAPROXEN 3 INFLUENCE OF PH 4 CONCLUSION ACKNOWLEDGMENTS REFERENCES Evaluation of biodiesel carbon soot particles as lubricant additives in soybean oil 1 INTRODUCTION 2 EXPERIMENT 3 RESULTS AND DISCUSSION 4 CONCLUSIONS ACKNOWLEDGMENTS REFERENCES A compound bactericide for industrial circulating water 1 INTRODUCTION 2 EXPERIMENTAL SECTION 3 RESULTS AND DISCUSSION 4 CONCLUSIONS ACKNOWLEDGEMENTS REFERENCES Simulation and application of eutrophication in Hongze Lake 1 INTRODUCTION 2 DATA AND METHODS 3 APPLICATION OF EFDC MODEL IN STUDY AREA3.1 4 CONCLUSION ACKNOWLEDGMENTS REFERENCES Comparison of geochemical characteristics of different crude oils from the Huizhou Sag 1 INTRODUCTION 2 MATERIALS AND METHODS 3 THE DISTRIBUTION AND COMPOSITION OF CHAIN ALKANES 4 TERPANE SERIES 5 STERANES 6 CONCLUSION REFERENCES Exploration of the factors affecting the determination of lead content in laboratory ceramic tiles 1 INTRODUCTION 2 EXPERIMENT 3 EXPERIMENTAL ANALYSIS 4 CONCLUSION ACKNOWLEDGMENTS REFERENCES The problems with the chemical oxygen demand process and analytical studies 1 INTRODUCTION 2 ANALYSIS MODEL OF HIGH CHLORINEWASTEWATER 3 THE RATIONALITY OF THE CRITICAL CONCENTRATION OF HIGH AND LOWCONCENTRATION 4 PRECISION CONTROL INDEX 5 FERROUS AMMONIUM SULFATE (ANHYDROUS) CONCENTRATION PROBLEMIN HJ/T70-2001 METHOD 6 CONCLUSIONS ACKNOWLEDGMENTS REFERENCES Review on in-situ chemical oxidation technology in groundwater remediation 1 INTRODUCTION 2 GROUNDWATER REMEDIATION TECHNOLOGY 3 IN-SITU CHEMICAL OXIDATION TECHNOLOGY 4 CONCLUSION REFERENCES Optimization and upgrading of chemical corrosion resistance testing methods for ceramic tiles 1 INTRODUCTION 2 OPTIMIZED AND UPGRADED THE TEST PROCESS 3 CONCLUSION ACKNOWLEDGMENTS REFERENCES Research on evaluation system of business model for recovery and reuse of sulfur hexafluoride 1 INTRODUCTION 2 BUSINESS MODEL OPTIONS 3 BUSINESS MODEL EVALUATION INDEX SYSTEM 4 RESULTS AND ANALYSIS 5 CONCLUSION ACKNOWLEDGMENTS REFERENCES The biochemical effects of rhubarb extract’s six anthraquinone derivatives in treating lung cancer 1 INTRODUCTION 2 MATERIALS AND METHODS 3 POSSIBLE RESULTS 4 DISCUSSION 5 CONCLUSION ACKNOWLEDGMENTS REFERENCES Applications of engineered nanoparticles in biomedicine 1 INTRODUCTION 2 OPTICAL IMAGING 3 LIGHT-TRIGGERED CANCER THERAPY 4 ELECTROCHEMICAL BIOSENSORS 5 OTHER APPLICATIONS 6 CONCLUSION REFERENCES Research on the application of chemical analysis technology in the testing of chemical raw materials 1 INTRODUCTION 2 BASIC CONCEPTS AND TECHNICAL STATUS OF CHEMICAL ANALYSISTECHNOLOGY 3 VALUE AND ROLE OF CHEMICAL ANALYSIS TECHNOLOGY APPLICATION 4 A BRIEF CLASSIFICATION OF CHEMICAL ANALYSIS METHODS 5 PRACTICAL APPLICATION OF CHEMICAL ANALYSIS METHOD IN CHEMICALMATERIAL TESTING 6 APPLICATION PROSPECT OF CHEMICAL ANALYSIS TECHNOLOGY IN THETESTING OF CHEMICAL RAW MATERIALS 7 CONCLUSION REFERENCES LEAP-based scenario analysis in carbon emission of Jiangsu Province 1 INTRODUCTION 2 STRUCTURE OF SCENARIO ANALYSIS BASED ON LEAP MODEL 4 SCENARIO SETTING AND KEY IMPACT FACTORS OUTLOOK 5 DATA COLLECTION AND CLEANING 6 CASE STUDIES 7 CONCLUSION ACKNOWLEDGMENTS REFERENCES Profit analysis of virtual power plant in the ancillary service market 1 INTRODUCTION 2 PROFIT ANALYSIS MODEL OF THE VIRTUAL POWER PLANT 3 NUMERICAL CASES 4 CONCLUSION ACKNOWLEDGEMENTS REFERENCES Research on the planning and allocation method of smart grid technological transformation investment scale considering operational uncertain factors 1 INTRODUCTION 2 THE BASIC PRINCIPLES OF INVESTMENT ALLOCATION METHODS FORTECHNOLOGICAL TRANSFORMATION IN DIFFERENT REGIONS 3 RESEARCH ON INVESTMENT ALLOCATION METHODS 4 EMPIRICAL ANALYSIS 5 CONCLUSION ACKNOWLEDGMENTS REFERENCES Analysis of treating solid waste by pyrolysis and gasification based on building green airports 1 INTRODUCTION 2 DEMAND OF SOLIDWASTE TREATMENT AT AIRPORT 3 SELECTION OF PYROLYSIS AND GASIFICATION FOR MANAGING AIRPORT SOLIDWASTE 4 TECHNICAL SOLUTIONS AND BASIC PROCESS OF MANAGING AIRPORT SOLIDWASTE VIA PYROLYSIS AND GASIFICATION 5 OVERALL BENEFITS 6 CONCLUSION REFERENCES Application of biochar in amelioration of saline-alkali soil 1 INSTRUCTION 2 EFFECTS OF BIOCHAR IN IMPROVING SALINE-ALKALI SOIL 3 EFFECTS OF MODIFIED BIOCHAR AND BIOCHAR COMBINED WITH OTHERMATERIALS ON SALINE-ALKALI SOIL 4 POTENTIAL ENVIRONMENTAL RISKS OF USING BIOCHAR 5 RESEARCH PROSPECT ACKNOWLEDGMENTS REFERENCES Indoor VOC removal method: An analysis for TiO2-coated activated carbon in air purification process 1 INTRODUCTION 2 METHODOLOGY 3 CONCLUSION ACKNOWLEDGMENTS REFERENCES Application of ultrafiltration-reverse osmosis system double membrane method in advanced treatment of fluoride in raw water 1 INTRODUCTION 2 METHODS AND MATERIALS 3 RESULTS AND DISCUSSION 4 CONCLUSION REFERENCES Industrial catalysis and chemical properties research Comparison of flocculation performance of inorganic ion modified polyferric sulfate 1 INTRODUCTION 2 EXPERIMENTAL 3 RESULTS AND DISCUSSION 4 CONCLUSION REFERENCES Effect of Pb2+ in pulp on the separation of lead-zinc sulfide minerals 1 INTRODUCTION 2 MATERIALS AND METHODS 3 TEST RESULTS AND ANALYSIS 4 CONCLUSION ACKNOWLEDGMENTS REFERENCES Effect of storage time on the change of physicochemical properties of stored sludge from a sewage plant 1 INTRODUCTION 2 MATERIALS AND METHODS 3 TEST RESULTS AND DISCUSSIONS 4 CONCLUSION ACKNOWLEDGMENTS REFERENCES Study on nitrogen removal of surface water by MBBR process coupled with sulfur autotrophic denitrification 1 INTRODUCTION 2 MATERIAL AND METHODS 3 RESULTS AND DISCUSSION 4 CONCLUSIONS ACKNOWLEDGMENT REFERENCES Hydrogenolysis of 2, 4, 6, 8, 10, 12-hexabenzyl-2, 4, 6, 8, 10, 12-hexaazaisowurtzitane (HBIW) with PdX (X=Fe, Ni, Co, Ag, Pt)/m 1 INTRODUCTION 2 EXPERIMENT 3 RESULTS AND DISCUSSION 4 CONCLUSIONS REFERENCES Determination of 13 bisphenol compounds in plastic food contact materials by gas chromatography-mass spectrometry 1 INSTRUCTIONS 2 EXPERIMENTAL AND METHODS 3 RESULTS AND DISCUSSION 4 CONCLUSION FUNDING REFERENCES Supercritical water oxidation of tributyl phosphate 1 INTRODUCTION 2 APPARATUSES AND PROCEDURES 3 RESULTS AND DISCUSSIONS 4 CONCLUSION ACKNOWLEDGEMENT REFERENCES Response of cadmium enrichment and free amino acids content in seedlings of two castor varieties to cadmium stress 1 INTRODUCTION 2 MATERIALS AND METHODS 3 RESULTS AND ANALYSIS 4 CONCLUSION ACKNOWLEDGEMENTS REFERENCES Study on preparation of C4 alkenes by ethanol coupling 1 INTRODUCTION 2 EXPLORING THE INFLUENCE OF AN INDEX ON TWO DEPENDENT VARIABLESBASED ON A MULTIVARIABLE LINEAR REGRESSION MODEL 3 CONCLUSION REFERENCES Experimental research of mercury thermal desorption in high-mercury gold separation residue 1 INTRODUCTION 2 EXPERIMENTAL MATERIALS AND METHODS 3 RESULTS AND DISCUSSIONS ACKNOWLEDGMENTS REFERENCES Migration and transformation of heavy metals during pyrolysis of printing and dyeing sludge 1 INTRODUCTION 2 EXPERIMENTAL RAW MATERIALS AND PYROLYSIS EXPERIMENTS 3 RESULTS AND DISCUSSION 4 CONCLUSION REFERENCES Electrokinetic motion of a particle at PEG-dextran interface in a microchannel 1 INTRODUCTION 2 MATERIAL AND METHOD 3 RESULT AND DISCUSSION 4 CONCLUSION ACKNOWLEDGMENTS REFERENCES Determination of the composition of imported recycled polyamide/polyethylene blends by differential scanning calorimetry 1 INTRODUCTION 2 EXPERIMENT 3 RESULTS AND DISCUSSION 4 CONCLUSION ACKNOWLEDGEMENTS REFERENCES Microporous aeration induced performance enhancement of electrochemical softening for circulating cooling water 1 GENERAL INSTRUCTIONS 2 EXPERIMENTAL DESIGN 3 RESULT 4 CONCLUSION REFERENCES Retrosynthesis of undescribed sesquiterpene lactone 1 INTRODUCTION 2 RETROSYNTHESIS ANALYSIS 3 RETROSYNTHETIC ROUTE 1 4 RETROSYNTHETIC ROUTE 2 5 RETROSYNTHETIC ROUTE 3 6 COMPARISON 7 CONCLUSION REFERENCES Occurrence and transformation of arsenic from coal to ash fly via combustion 1 INTRODUCTION 2 EXPERIMENT AND METHODS 3 RESULTS AND DISCUSSIONS 4 CONCLUSIONS REFERENCES Preparation and properties of straw-based water absorbent materials 1 INTRODUCTION 2 SYNTHESIS OF STRAW-BASEDWATER-ABSORBENT RESIN 3 RESULT AND ANALYSIS 4 CONCLUSION REFERENCES Collaboration between C-H activation and pericyclic reactions for constructing fused eightand four-membered carbocycles 1 INTRODUCTION 2 USING PERICYCLIC REACTIONS TO PREPARE FUSED EIGHT- ANDFOUR-MEMBERED CARBOCYCLES 3 THE ROLE OF C-H ACTIVATION 4 INTEGRATED APPROACH 5 CONCLUSION AND FUTURE PERSPECTIVES REFERENCES A proposed synthesis routine of akuammicine, one of the akuamma alkaloids from the seeds of the akuamma tree 1 INTRODUCTION 2 SPECIFIC CONTENT AND DISCUSSION 3 CONCLUSION ACKNOWLEDGMENT AUTHOR CONTRIBUTION REFERENCES Experimental study on coalescing and separation to remove trace water from jet fuel 1 INTRODUCTION 2 TEST PART 3 RESULTS AND DISCUSSION 4 CONCLUSION REFERENCES Catalytic activity for hydrogen evolution reaction in phosphene nanoribbons: A first-principles study 1 INTRODUCTION 2 MODEL AND CALCULATION METHOD 3 RESULTS AND DISCUSSION 4 CONCLUSION REFERENCES Ni-based catalyst for phenol and its derivative selective hydrodeoxygenation 1 INTRODUCTION 2 EFFECTS 3 COMPARISON 4 CONCLUSION ACKNOWLEDGEMENT REFERENCES How effective is feather degradation solution as a fertilizer in soilless lettuce cultivation 1 INTRODUCTION 2 RELEVANT CONCEPTS 3 MATERIALS AND METHODS 4 MEASURING DATA 5 RESULTS 6 DISCUSSION 7 CONCLUSION REFERENCES Research on low temperature NO conversion over Mn-TiO2 catalysts 1 INTRODUCTION 2 EXPERIMENTAL 3 RESULTS AND DISCUSSION ACKNOWLEDGMENTS REFERENCES Graphited mesoporous carbon as polysulfide host by chemical vapor deposition for high-rate Li-S batteries 1 INTRODUCTION 2 EXPERIMENTS 3 RESULTS AND DISCUSSIONS 4 CONCLUSION REFERENCES Experiments and thermodynamic models for ternary liquid-liquid equilibrium systems of water + furfuryl alcohol-ethyl acetate at different temperatures 1 INTRODUCTION 2 EXPERIMENTAL PART 3 RESULT AND DISCUSSION 4 CONCLUSION ACKNOWLEDGMENTS REFERENCES Study on synthesis of polycarbonate by melt transesterification 1 INTRODUCTION 2 EXPERIMENT 3 RESULTS AND DISCUSSIONS 4 CONCLUSION REFERENCES Determination and correlation of liquid-liquid equilibrium of water + furfuryl alcohol + extractant 1 INTRODUCTION 2 MATERIALS AND METHODS 3 RESULTS AND DISCUSSION 4 CONCLUSION ACKNOWLEDGMENTS REFERENCES Study on a structure of C8H20O20Tb2 1 INTRODUCTION 2 EXPERIMENTAL 3 RESULTS AND DISCUSSIONS 4 CONCLUSIONS ACKNOWLEDGMENTS REFERENCES Effects of crop straw on manganese, boron, and iron uptake of Amygdalus davidiana seedlings 1 INTRODUCTION 2 MATERIALS AND METHODS 3 RESULTS 4 DISCUSSION 5 CONCLUSION ACKNOWLEDGMENTS REFERENCES Experimental study on electrochemical corrosion of tubing wall in flowing liquids 1 INTRODUCTION 2 EXPERIMENTAL MATERIALS AND METHODS 3 EXPERIMENTAL RESULTS 4 DISCUSSION 5 CONCLUSION ACKNOWLEDGMENTS REFERENCES Electrochemical corrosion behavior of steel in acid solution with some tetrazole derivative 1 INTRODUCTION 2 MATERIALS AND PREPARATION AND ELECTROCHEMICAL EXPERIMENTS 3 RESULTS AND DISCUSSION 4 CONCLUSION ACKNOWLEDGMENTS AUTHORS’ BIOGRAPHY REFERENCES Adsorption of different plant straws on congo red 1 INTRODUCTION 2 EXPERIMENTAL METHODS 3 RESULTS AND DISCUSSION 4 CONCLUSION REFERENCES Chemical devices and environmental chemistry research Constructed wetland systems vegetated with different plants applied to the treatment of nitrobenzene wastewater 1 INTRODUCTION 2 MATERIALS AND METHODS 3 TEST RESULTS AND DISCUSSIONS 4 CONCLUSION ACKNOWLEDGMENTS REFERENCES Research on pretreatment of organic sulfur compounds in garlic wastewater by coagulation 1 INTRODUCTION 2 MATERIALS AND METHODS 3 RESULTS AND DISCUSSION 4 CONCLUSIONS REFERENCES Spatial distribution characteristics of five heavy metals elements in rice: A case study for different basins in Heilongjiang Province 1 INTRODUCTION 2 MATERIALS AND METHODS 3 RESULTS AND ANALYSIS 4 CONCLUSIONS AND DISCUSSION ACKNOWLEDGMENT REFERENCES Expanded application study on the treatment of dye wastewater by ozone advanced oxidation 1 INTRODUCTION 2 MATERIALS AND METHODS 3 RESULTS AND DISCUSSION 4 CONCLUSIONS ACKNOWLEDGMENT REFERENCES Preliminary study on purification of wastewater from liquor production 1 INTRODUCTION 2 EXPERIMENTAL METHOD 3 RESULTS AND DISCUSSION 4 CONCLUSION FOUNDATION REFERENCES Treatment of amoxicillin wastewater by Fe/Cu micro-electrolysis and the COD removal kinetics: Effects of Fe filler particle size and shape 1 INTRODUCTION 2 MATERIALS AND METHODS 3 RESULTS AND DISCUSSIONS 4 CONCLUSION ACKNOWLEDGMENTS REFERENCES Application of staged flocculation sedimentation process in treatment of wastewater from copper concentrator 1 INTRODUCTION 2 RELATEDWORK 3 MATERIALS AND METHODS 4 RESULTS AND DISCUSSION 5 CONCLUSIONS ACKNOWLEDGMENTS REFERENCES Fenton-neutralization-coagulation process for the treatment of SDBS wastewater 1 INTRODUCTION 2 TEST 3 TEST PART 4 CONCLUSION REFERENCES Research on disinfection technology of medical wastewater based on chlorine dioxide 1 INTRODUCTION 2 RELATEDWORK 3 MATERIALS AND METHODS 4 RESULTS AND DISCUSSION 5 CONCLUSIONS REFERENCES Optimization of low temperature plasma system for the degradation of UDMH wastewater through response surface methodology 1 GENERAL INSTRUCTIONS 2 CONSTRUCTION OF LOWTEMPERATURE PLASMA SYSTEM FOR UDMHWASTEWATER TREATMENT 3 EXPERIMENT DESIGN FOR RESPONSE SURFACE METHODOLOGY 4 ESTABLISHMENT OF QUADRATIC RESPONSE SURFACE REGRESSION MODELAND RESPONSE SURFACE ANALYSIS 5 SYSTEM OPTIMIZATION ANALYSIS 6 CONCLUSION REFERENCES High-alkali lime method combined with flue gas neutralization for the removal of low-concentration chloride ions in dye wastewater 1 INTRODUCTION 2 EXPERIMENTAL 3 RESULTS AND DISCUSSION 4 CONCLUSIONS ACKNOWLEDGMENTS REFERENCES A summary of the sources, pathways, environmental impacts, and implications of ZnO and TiO2 nanoparticles 1 INTRODUCTION 2 MAIN BODY 3 DISCUSSION 4 CONCLUSION REFERENCES Methodological verification of determination of TVOC in indoor air 1 INTRODUCTION 3 RESULTS 4 CONCLUSION REFERENCES Research progress of nitrogen removal in low C/N wastewater by constructed wetlands: Mechanism and influencing factors 1 INTRODUCTION 2 THE REMOVAL MECHANISMS OF NITROGEN IN CONSTRUCTED WETLAND 3 THE MAIN INFLUENCING FACTORS OF NITROGEN REMOVAL PERFORMANCE 4 CONCLUSION ACKNOWLEDGEMENTS REFERENCES Screening of nitrogen removal bacteria and its application in aquaculture wastewater treatment 1 INTRODUCTION 2 METHODS 3 RESULITS 4 CONCLUSIONS ACKNOWLEDGEMENTS REFERENCES Pilot scale experimental study on fluoride removal by chemical precipitation combined with high efficiency solid-liquid separator 1 INTRODUCTION 2 MATERIALS AND METHODS 4 CONCLUSION REFERENCES Inter-monthly change and climatic zoning of sea surface temperature in the South China Sea and the adjacent Northwest Pacific Ocean 1 INTRODUCTION 3 THE SST CHARACTERISTICS 4 DISCUSSION: THE CLIMATE ZONING (AREA) AT THE STUDY AREA 5 CONCLUSION ACKNOWLEDGMENT REFERENCES Research progress on the mechanisms of tropical cyclone intensity changes 1 INTRODUCTION 2 EXTERNAL FACTORS 3 INTERNAL DYNAMIC PROCESSES 4 CONCLUSION ACKNOWLEDGMENTS REFERENCES Research on scenario construction and dynamic deduction model of major hazardous chemicals disaster based on stochastic petri net 1 INTRODUCTION 2 MAJOR HAZARDOUS CHEMICAL ACCIDENT SCENARIO CONSTRUCTION 4 SCENARIO DYNAMIC INFERENCE SIMULATION ANALYSIS 5 CONCLUSION ACKNOWLEDGMENTS REFERENCES Research and application of instrument and equipment health evaluation method considering state evolution process 1 INTRODUCTION 2 FRAMEWORK OF INSTRUMENT AND EQUIPMENT HEALTH MANAGEMENTSYSTEM 3 STUDY ON THE EVOLUTION PROCESS OF HEALTH STATUS OF INSTRUMENTSAND EQUIPMENT 4 EXPERIMENTAL RESEARCH AND APPLICATION EXAMPLES 5 CONCLUSION FUND PROJECT REFERENCES Design of solid-liquid fertilizer mixing device for petroleum-contaminated soil organic fertilizer remediation machine 1 INSTRUCTION 2 DESIGN OF SOLID-LIQUID FERTILIZER MIXER 3 FLOW FIELD TEST AND RESULT ANALYSIS OF FERTILIZER MIXER 4 RESULTS VALIDATION AND ANALYSIS ACKNOWLEDGMENTS 5 CONCLUSION REFERENCES Adsorption of nitrogen and phosphorus in wastewater by modified biochar 1 INTRODUCTION 2 REMOVAL METHODS OF NITROGEN AND PHOSPHORUS 3 THE PREPARATION OF BIOCHAR 4 MODIFIED BIOCHAR 5 CONCLUSION ACKNOWLEDGEMENTS REFERENCES Study on characteristics of membrane fouling in MBR for liquor-making wastewater treatment and its cleaning 1 INTRODUCTION 2 RELATEDWORK 3 MATERIALS AND METHODS 4 RESULTS AND DISCUSSION REFERENCES Influence of application frequency and amount of biogas slurry on infiltration liquid 1 INTRODUCTION 2 MATERIALS AND METHODS 3 THE RESULT AND DISCUSSION 4 CONCLUSION ACKNOWLEDGMENTS REFERENCES Explore the purification effect of constructed wetlands on total phosphorus in water, taking Taihu Sanshan IslandWetland Park as an example 1 INTRODUCTION 2 METHODOLOGY 3 DISCUSSION 4 CONCLUSION REFERENCES Author index