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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...

Overview of Advanced Functional Groups

Overview of Advanced Functional Groups

Functional groups are groups of atoms with specific chemical properties that occur within organic molecules and are sometimes denoted as “R”. Functional groups can “functionalize” a compound by enabling it to adopt different physical and chemical properties.
Types of Advanced Functional Groups
The table below summarizes some of the major functional groups in organic chemistry.

Directing Effect of Substituents: meta-Directing Groups

Directing Effect of Substituents: meta-Directing Groups

Substituents on the benzene ring that direct an incoming electrophile to undergo substitution at the meta position are called meta directors. All meta directors either have a positive charge on the atom directly bonded to the ring or a partial positive charge. These groups function by withdrawing electrons from the ring through inductive and resonance effects. Consider the carbocation intermediates formed upon the addition of an electrophile on nitrobenzene at the...

Directing Effect of Substituents: ortho–para-Directing Groups

Directing Effect of Substituents: ortho–para-Directing Groups

Ortho–para directors are substituent groups attached to the benzene ring and direct the addition of an electrophile to the positions ortho or para to the substituent. All electron-donating groups are considered ortho–para directors. They donate electrons to the ring and make the ring more electron-rich. The ring is therefore susceptible to the addition of electrophiles. Substituents such as amino, hydroxy, or alkoxy, containing lone pairs on the atom adjacent to the ring, donate...

Sample Preparation for Analysis: Advanced Techniques

Sample Preparation for Analysis: Advanced Techniques

Accurate analysis of complex samples often requires advanced preparation techniques to achieve reliable and reproducible results. Samples containing inorganic or organic materials can be challenging to dissolve or decompose effectively. Standard sample preparation methods include acid digestion, fusion, dry ashing, and wet digestion.
Acid digestion with strong acids is commonly used to dissolve inorganic materials that are insoluble (do not dissolve) in water. This method can be useful for...

Directional Relays

Directional Relays

Directional relays, essential for managing unidirectional fault currents, enhance the safety and efficiency of power systems. On power lines equipped with directional relays, faults downstream (to the right) of the current transformer typically cause the fault current to lag the bus voltage by approximately 90 degrees, known as the forward direction. In contrast, upstream (left-side) faults may result in the fault current leading the bus voltage by nearly 90 degrees, termed the reverse...

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Related Experiment Video

Updated: Jan 28, 2026

Separation and Identification of Conventional Microplastics from Farmland Soils

Separation and Identification of Conventional Microplastics from Farmland Soils

Published on: March 21, 2025

Microplastic Pollution: Advancements in Mitigation, Policy Challenges, and Future Directions.

Prachi Gaur¹, Pallavi Gupta¹, Vivek Gaur²

¹Amity Institute of Biotechnology, Amity University Uttar Pradesh Lucknow Campus, Lucknow, Uttar Pradesh, India.

Current Microbiology

|January 26, 2026

Summary

Microplastic pollution requires integrated solutions. While filtration is ready, it has limits; advanced oxidation is costly; and biological methods are slow, highlighting the need for interdisciplinary research and novel technologies.

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Last Updated: Jan 28, 2026

Separation and Identification of Conventional Microplastics from Farmland Soils

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Sampling and Identification of Microplastics in Groundwater

Sampling and Identification of Microplastics in Groundwater

Published on: November 7, 2025

Area of Science:

Environmental Science
Ecotoxicology
Environmental Engineering

Background:

Microplastic (MP) pollution is a pervasive global environmental issue.
Existing reviews address mitigation strategies in isolation, lacking comparative synthesis.
There is a need for an integrated evaluation of MP mitigation interventions.

Purpose of the Study:

To provide a decision-oriented synthesis of biological, technological, and policy interventions for microplastic mitigation.
To comparatively assess the efficacy, limitations, scalability, and deployment readiness of various MP removal strategies.
To identify research gaps and guide future mitigation efforts.

Main Methods:

Comprehensive literature review of biological, engineering, and policy-based microplastic mitigation strategies.
Comparative analysis of intervention effectiveness, cost, scalability, and readiness for deployment.
Synthesis of findings to inform integrated mitigation approaches.

Main Results:

Filtration is the most deployment-ready technology but faces challenges with fouling and capturing small microplastics.
Advanced oxidation processes show potential but are energy- and cost-intensive.
Biological and enzymatic methods are promising but currently limited by speed and scalability; engineered strains pose biosafety risks.

Conclusions:

No single intervention is sufficient; integrated strategies combining different approaches are necessary.
Further interdisciplinary research and novel technological solutions are crucial for effective microplastic pollution control.
Urgent, coordinated action across sectors is required to develop and implement comprehensive mitigation plans.