相关实验视频

Updated: Jun 6, 2025

Detection and Recovery of Palladium, Gold and Cobalt Metals from the Urban Mine Using Novel Sensors/Adsorbents Designated with Nanoscale Wagon-wheel-shaped Pores

Detection and Recovery of Palladium, Gold and Cobalt Metals from the Urban Mine Using Novel Sensors/Adsorbents Designated with Nanoscale Wagon-wheel-shaped Pores

Published on: December 6, 2015

由于吸附和还原机制,通过Co和PPy共同修改的Ca-Al层双氧化物进行增强的Cr(vi) 去除

Wenyan He^1,2, Kaijie Ye¹, Mi Zhang¹

¹College of Geology and Environment, Xi'an University of Science and Technology Xi'an 710054 China wenyanhe001@xust.edu.cn (+8629) 8558-3188.

|November 29, 2024

概括

通过协同效应,Co和多聚烯共同修改的CaAl-LDH微球有效地去除Cr (VI),实现高吸附能力和去除效率. 这种材料在废水处理应用中表现有前途.

科学领域:

材料科学材料科学材料科学
环境化学环境化学
纳米技术纳米技术

背景情况:

(VI) 是一种有毒的污染物,需要有效地从水中去除.
层次层次的双氧化物 (LDH) 提供了污染物修复的潜力.
协同修改LDH可以增强它们的吸附性质.

研究的目的:

为了合成和描述Co和多聚烯共修饰的CaAl-LDH微球 (CCALP).
调查CCALP的Cr (VI) 去除效率和机制.
评估Co和多聚烯在吸附性能上的协同效应.

主要方法:

水热合成和现场聚合用于CCALP制造.
批量吸附试验用于Cr (VI) 的去除.
兰木尔等热量,阿弗拉米分数动力学和热力学分析.
密度函数理论 (DFT) 和静电电位 (ESP) 的计算.

主要成果:

与单独修改的LDH相比,CCALP表现出更大的表面积和更多的还原点.
最大吸附能力为845.25毫克g-1和98.83%的Cr6去除效率.
吸附遵循兰格穆尔等温和和Avrami分数动力学,表明自发的外热单层吸附.
DFT/ESP计算证实了Cr (VI) 亲和点和由于联合兴奋剂而改善的吸附能量.

结论:

和聚烯的共同修饰显著增强了CaAl-LDH微球的Cr(VI) 移除.
移除机制涉及静电相互作用,离子交换,复杂化和减少.
CCALP展示了出色的可回收性和实际废水处理的潜力.

更多相关视频

Preparation of Biomass-based Mesoporous Carbon with Higher Nitrogen-/Oxygen-chelating Adsorption for CuII Through Microwave Pre-Pyrolysis

Preparation of Biomass-based Mesoporous Carbon with Higher Nitrogen-/Oxygen-chelating Adsorption for CuII Through Microwave Pre-Pyrolysis

Published on: February 12, 2019

Removal of Arsenic Using a Cationic Polymer Gel Impregnated with Iron Hydroxide

Removal of Arsenic Using a Cationic Polymer Gel Impregnated with Iron Hydroxide

Published on: June 28, 2019

相关概念视频

Coagulation

Coagulation

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...

Colloidal precipitates

Colloidal precipitates

The high insolubility of some precipitates can result in an unfavorable relative supersaturation. This can lead to colloidal particles with a large surface-to-mass ratio, where adsorption is promoted. For instance, in the precipitation of silver chloride, silver ions are adsorbed on the surface of the colloidal particles, forming a primary layer. This layer attracts ions of opposite charge (such as nitrate ions), forming a diffuse secondary layer of adsorbed ions. This electric double layer...

Precipitation and Co-precipitation

Precipitation and Co-precipitation

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...

Extraction: Advanced Methods

Extraction: Advanced Methods

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...