提高灌水质量高效地用地衍生吸收剂:重金属排毒和营养增强营养
Yi Lin1, Xuehong Zhang1, Yuexin Fu1
1The Guangxi Key Laboratory of Theory and Technology for Environmental Pollution Control, Guilin University of Technology, Guilin 541006, China; Collaborative Innovation Center for Water Pollution Control and Water Safety in Karst Area, Guilin University of Technology, Guilin 541006, China; Modern Industry College of Ecology and Environmental Protection, Guilin University of Technology, Guilin 541006, China.
Ecotoxicology and environmental safety
|July 4, 2024
概括
一种新的田衍生吸附剂 (PFDA) 有效地从灌水中去除有毒的Pb2+和Cd2+. 这种具有成本效益的材料还增强了必需的矿物营养素,为农业水处理提供了可持续的解决方案.
科学领域:
- 环境化学环境化学
- 材料科学 材料科学 材料科学
- 农业科学 农业科学
背景情况:
- 重金属污染 (Pb2+,Cd2+) 和灌水中的营养缺乏威胁到农产品的安全和质量.
- 现有的治疗方法往往是昂贵的和不太可持续的.
研究的目的:
- 开发一种经济有效的吸附剂,用于从灌水中去除Pb2+和Cd2+.
- 研究吸附剂的吸附机制,容量和可回收性.
- 评估吸附剂对处理过水中的必需矿物营养水平的影响.
主要方法:
- 通过球磨热激活合成田衍生吸附剂 (PFDA).
- 批量吸附实验以评估Pb2+和Cd2+的去除效率和动力学.
- 兰木尔模型,准二阶动力学和粒子内部扩散分析.
- 在不同的pH值下进行溶解和可回收性测试.
- 对灌水后处理过程中矿物营养变化的分析.
主要成果:
- 在室温下,PFDA表现出高的去除能力:Pb2+的417 mg·g-1和Cd2+的56.3 mg·g-1
- 吸附后进行单层化学吸附,在共存的溶液中优先去除Pb2+.
- 在pH≤0.5下,PFDA表现出极好的可回收性,在10分钟内有效地去除了96.0%的Pb2+和70.3%的Cd2+.
- 在经过处理的灌水中观察到K+,Si4+,Ca2+和Mg2+度显著增加.
结论:
- 地衍生吸附剂 (PFDA) 是一种具有成本效益和高效的材料,用于从灌水中去除Pb2+和Cd2+.
- 对于传统的重金属处理方法,PFDA提供了一个可持续的替代方案.
- 吸附剂同时解决重金属污染和矿物营养素缺乏问题,改善农业灌水质量.
相关概念视频
Precipitation and Co-precipitation
1.7K
Precipitation and coprecipitation methods can be used to separate a mixture of ions in a solution. In qualitative inorganic analysis, ions that form sparingly soluble precipitates with the same reagent are separated based on the differences in solubility products. For example, consider the separation of Cu(II) and Fe(II) ions by precipitation as insoluble sulfides. First, copper(II) sulfide is precipitated by the addition of acidic H2S, where the dissociation of H2S is suppressed. Adding H2S...
1.7K
Responses to Salt Stress
13.1K
Salt stress—which can be triggered by high salt concentrations in a plant’s environment—can significantly affect plant growth and crop production by influencing photosynthesis and the absorption of water and nutrients.
13.1K
Coagulation
280
Colloidal solids are solid particles suspended in solution. They are usually negatively charged, attracting a compact primary layer of positively charged ions, which attract more counterions to form an electrical double layer. Electrostatic repulsion between the charged double layers prevents the particles from colliding, stabilizing the colloids. These solids are often undesirable because they can contain toxins that are difficult to remove. Coagulation is a technique that helps aggregate and...
280
Extraction: Advanced Methods
444
Metal ions can be separated from one another by complexation with organic ligands–the chelating agent– to form uncharged chelates. Here, the chelating agent must contain hydrophobic groups and behave as a weak acid, losing a proton to bind with the metal. Since most organic ligands used in this process are insoluble or undergo oxidation in the aqueous phase, the chelating agent is initially added to the organic phase and extracted into the aqueous phase. The metal-ligand complex is...
444
Bioremediation
18.2K
Bioremediation is the use of prokaryotes, fungi, or plants to remove pollutants from the environment. This process has been used to remove harmful toxins in groundwater as a byproduct of agricultural run-off and also to clean up oil spills.
18.2K


