李莲芳,博士,中共党员,毕业于中国农业大学资源环境学院,现任中国农业科学院农业环境与可持续发展研究所研究员,博士生导师,BIOCHAR期刊青年编委,湖南农业大学兼职导师。国家自然基金委及全国硕博士论文评审专家。长期从事农业面源污染防控、风险评估与污染修复原理、技术及产品研发。先后主持相关领域的国家重点研发计划、国家自然科学基金、国家科技支撑计划及部委地方合作项目二十余项。针对流域生态环境污染物累积与防控问题,创建了典型流域水环境-沉积物生态风险评估新方法,系统阐明了集约化农区耕地典型污染物的来源及质量演化规律,揭示了污染物累积过程与控制原理,研发了流域水土污染防控与修复的系列新材料、新技术和新产品,并应用推广,取得了显著的经济、社会和生态环境效益。先后获省级科技进步奖一等奖1项,获国家发明专利授权7项,软件著作权2项,在Chemical Engineering Journal、Journal of Hazardous Materials、Bioresource Technology、Journal of Cleaner Production等国际国内权威刊物发表论文100余篇,以第一完成人的论文曾被授予“领跑者5000-中国精品科技期刊顶尖学术论文”荣誉,培养硕博士研究生十余名,出版专著5部。
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Adsorption characteristics of LDH-based magnetic biochar for phosphate and its application in the remediation of real contaminated water bodies
Institute of Environment and Sustainable Development in Agriculture/Key Laboratory of Agricultural and Rural Eco-Environment of Ministry of Agriculture and Rural Affairs,Chinese Academy of Agricultural Sciences,Beijing 100081,China
To address the challenge of excessive phosphorus (P) contamination in China’s surface water bodies and the associated difficulties in its remediation, a novel LDH-based magnetic biochar composite FLBC was synthesized via a hydrothermal method. The composite was prepared using bamboo sawdust, a typical agricultural and forestry waste, as the carbon precursor, ferric oxide as the magnetic core, and LDH as the co-loaded functional phase. Batch equilibrium adsorption experiments, along with SEM-EDS and XPS characterizations, were conducted to investigate the phosphate removal performance and underlying mechanisms. The results demonstrated that FLBC reached adsorption equilibrium within 240 minutes and exhibited a maximum adsorption capacity of 93.92 mg/g, which was 3.7 times higher than that of unmodified biochar. The adsorption process conformed to the Langmuir isotherm and pseudo-second-order kinetic models, indicating a monolayer chemisorption mechanism. After three consecutive adsorption-desorption cycles, FLBC retained 56.8% of its original capacity, confirming its structural stability and regeneration potential. XPS analysis further revealed that phosphate removal involved multiple mechanisms, including metal-ligand coordination, surface complexation-precipitation, electrostatic interaction, and ion exchange. Moreover, when applied to actual phosphorus-contaminated water samples from the Guanting Reservoir, a representative surface water body in Beijing, FLBC achieved a removal efficiency of up to 85.7%, significantly improving water quality and demonstrating promising application potential in practical phosphorus pollution control.
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李莲芳,博士,中共党员,毕业于中国农业大学资源环境学院,现任中国农业科学院农业环境与可持续发展研究所研究员,博士生导师,BIOCHAR期刊青年编委,湖南农业大学兼职导师。国家自然基金委及全国硕博士论文评审专家。长期从事农业面源污染防控、风险评估与污染修复原理、技术及产品研发。先后主持相关领域的国家重点研发计划、国家自然科学基金、国家科技支撑计划及部委地方合作项目二十余项。针对流域生态环境污染物累积与防控问题,创建了典型流域水环境-沉积物生态风险评估新方法,系统阐明了集约化农区耕地典型污染物的来源及质量演化规律,揭示了污染物累积过程与控制原理,研发了流域水土污染防控与修复的系列新材料、新技术和新产品,并应用推广,取得了显著的经济、社会和生态环境效益。先后获省级科技进步奖一等奖1项,获国家发明专利授权7项,软件著作权2项,在Chemical Engineering Journal、Journal of Hazardous Materials、Bioresource Technology、Journal of Cleaner Production等国际国内权威刊物发表论文100余篇,以第一完成人的论文曾被授予“领跑者5000-中国精品科技期刊顶尖学术论文”荣誉,培养硕博士研究生十余名,出版专著5部。
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李莲芳,博士,中共党员,毕业于中国农业大学资源环境学院,现任中国农业科学院农业环境与可持续发展研究所研究员,博士生导师,BIOCHAR期刊青年编委,湖南农业大学兼职导师。国家自然基金委及全国硕博士论文评审专家。长期从事农业面源污染防控、风险评估与污染修复原理、技术及产品研发。先后主持相关领域的国家重点研发计划、国家自然科学基金、国家科技支撑计划及部委地方合作项目二十余项。针对流域生态环境污染物累积与防控问题,创建了典型流域水环境-沉积物生态风险评估新方法,系统阐明了集约化农区耕地典型污染物的来源及质量演化规律,揭示了污染物累积过程与控制原理,研发了流域水土污染防控与修复的系列新材料、新技术和新产品,并应用推广,取得了显著的经济、社会和生态环境效益。先后获省级科技进步奖一等奖1项,获国家发明专利授权7项,软件著作权2项,在Chemical Engineering Journal、Journal of Hazardous Materials、Bioresource Technology、Journal of Cleaner Production等国际国内权威刊物发表论文100余篇,以第一完成人的论文曾被授予“领跑者5000-中国精品科技期刊顶尖学术论文”荣誉,培养硕博士研究生十余名,出版专著5部。
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