Investigation of competitive adsorption and desorption of heavy metals from aqueous solution using raw rock: Characterization kinetic, isotherm, and thermodynamic

Bassam, Rajaa; Alouani, Marouane El; Maissara, Jabrane; Jarmouni, Nabila; Belhabra, Mustafa; Chbihi, Mohammed El Mahi; Belaaouad, Saïd

doi:10.1016/j.matpr.2021.11.450

Cited by 13 publications

(4 citation statements)

References 23 publications

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“…The Efficiency of Chamomile in Crystal Violet Dye Removal Processes surface [73]. The negative ΔG 0 explains the spontaneity of the processes [74].…”

Section: Effect Of the Temperature And Adsorption Thermodynamicsmentioning

confidence: 99%

The Efficiency of Chamomile in Crystal Violet Dye Removal Processes

DANDIL

2023

Erzincan Üniversitesi Fen Bilimleri Enstitüsü Dergisi

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Bu çalışmada papatyanın adsorplama özellikleri incelenmiştir. Crystal Violet (CV) boya adsorpsiyon proseslerinde adsorban olarak, işlenmemiş papatya (Ch) ve fosforik asit (H3PO4) (Ch-H3PO4) kullanılarak hazırlanan aktif karbon formu kullanılmıştır. Adsorbanların yüzey yapılarını gözlemlemek için Taramalı Elektron Mikroskobu (SEM) analizleri kullanılmıştır. Adsorpsiyon etkinlikleri pH (1-7), zaman (0-300 dk), başlangıç boya konsantrasyonu (10-50 ppm), adsorban miktarı (0,5-2 g/L) ve sıcaklığa (25-45 °C) bağlı olarak her bir adsorban için incelenmiş ve birbiriyle karşılaştırılmıştır. Adsorpsiyon proseslerinin 300 dk’ da dengeye ulaştığı belirlenmiştir. Her iki proseste de en yüksek giderimler pH 7' de elde edilmiştir. Tüm değişen konsantrasyonlarda, her iki adsorban da yüksek giderim yüzdelerine ulaşmıştır. Ayrıca değişen adsorban dozajının, her iki adsorbanın kapasite değerlerini büyük ölçüde etkilediği gözlenmiştir. Kinetik çalışmalarda proseslerin yalancı ikinci dereceden kinetik model ile açıklandığı ve izoterm çalışmalarının Freundlich izotermi ile uyumlu olduğu görülmüştür. Termodinamik çalışmalarında ΔH0 değerleri Ch ve Ch-H3PO4 için sırasıyla 20,69 ve -34,87 kJ mol-1 olarak hesaplanmıştır. Negatif ve pozitif ΔH0 değerleri sırasıyla ekzotermik ve endotermik doğayı gösterir. Ch ve Ch-H3PO4 için ΔS0 değerleri sırasıyla 76,52 ve -95,55 J mol-1K-1 olarak bulunmuştur. Negatif ΔG0 değerleri proseslerin kendiliğindenliğini açıklamaktadır. Sonuç olarak, işlenmemiş papatyanın CV boya gideriminde etkili olduğu, H3PO4 kullanılarak aktif karbon hazırlanması ile etkinliğinin arttığı belirlenmiştir.

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“…The Efficiency of Chamomile in Crystal Violet Dye Removal Processes surface [73]. The negative ΔG 0 explains the spontaneity of the processes [74].…”

Section: Effect Of the Temperature And Adsorption Thermodynamicsmentioning

confidence: 99%

The Efficiency of Chamomile in Crystal Violet Dye Removal Processes

DANDIL

2023

Erzincan Üniversitesi Fen Bilimleri Enstitüsü Dergisi

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“…Electrostatic interaction, common in the environment, plays a key role in attracting heavy metals to adsorbents. The initial step involves the attraction of metal cations to the functional groups on the adsorbent surface through electrostatic forces, followed by further binding through other driving forces [78]. The efficacy of electrostatic interactions is highly influenced by the acidity of the reaction medium, primarily because the charge properties of metal species and the adsorbent surface vary at different pH values [79].…”

Section: Electrostatic Interactionmentioning

confidence: 99%

Exploring Humic Acid as an Efficient and Selective Adsorbent for Lead Removal in Multi-Metal Coexistence Systems: A Review

Xue,

Hu,

Wan

et al. 2024

Separations

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Water pollution poses a global threat to human health, particularly in terms of ensuring a safe supply of drinking water. The accumulation of heavy metals from various water sources is increasing, driving the search for effective and environmentally friendly approaches and materials for metal removal. This review investigates the selective adsorption of Pb2+ by humic acid (HA) in a multi-metal coexistence solution. The focus is on discussing approaches to the structural identification of HA, highlighting that separation techniques are an effective method to reduce its heterogeneity. Starting from the key structural units of HA, the study reveals the interaction between HA and heavy metals. Approaches to enhance Pb2+ selective adsorption are explored, proposing that introducing activating groups, Ca ion exchange, and optimizing pore structures are effective approaches for improving lead ion selective adsorption. Ca2+ activation is suggested as a future research direction for lead-selective adsorption. Additionally, attaining lead selective adsorption through pH regulation’s significance is emphasized. This research contributes to a fundamental understanding of HA’s role as a selective lead adsorbent while offering practical implications for developing environmentally friendly adsorbent materials. The results aim to advance knowledge in environmental science and water treatment.

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“…Bassam et al 93 carried out a study to establish the ease of removing Cd(II), As(III), and Cr(VI) ions competitively from aqueous media using raw rock. The impact of adsorbent dose, agitation time, reaction temperature, pH, and initial concentration on Cd(II), Cr(VI), and As(III) ions removal in the batch mode was undertaken.…”

Section: Natural or Unmodied (Pristine) Adsorbentsmentioning

confidence: 99%