Efficacy of Electrokinetics in Remediating Soft Clay Slurries Contaminated with Cadmium and Copper

Hassan, Ikrema; Mohamedelhassan, Eltayeb

doi:10.1007/s11270-021-05250-9

Cited by 8 publications

(4 citation statements)

References 31 publications

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“…In previous studies electrokinetic treatment application, the variations in the supplied power by executing predetermined on and off periods, during the process was found to be beneficial to effectiveness of the treatment [5] [10]. A recent study concluded that in Chain the cost of electorkinetic remediation with solar cell panel was 40% of that carried by electric power from the grid [6] [11].…”

Section: Related Workmentioning

confidence: 99%

Restoration of Heterogeneous Soils Contaminated with Copper Using Electrokinetic Remediation

Hassan¹,

Mohamedelhassan²

2023

IJEPR

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In this study, heterogeneous soils contaminated with copper were remediated using solar powered electrokinetic treatment. The heterogeneous soils were composed of clay and sand with ratio 2:1. In one soil, a sand layer was sandwiched between two layers of clay while in another sand pockets made 1/3 of the soil mass. The third heterogeneous soil was a claysand mixture. An additional test was carried out with homogeneous clay to provide data for contrast. The soil samples were artificially contaminated with 150 mg of copper per kg of dry soil at water content 41% and placed inside four identical electrokinetic cells. Each cell was connected to a solar cell panel with peak voltage gradient 205 V/m. Encouraging results were obtained. Eighty-seven percent of copper was removed from specimen near the anode in the test of the clay-sand mixture compared to 86% in the homogeneous clay.

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Section: Related Workmentioning

confidence: 99%

Restoration of Heterogeneous Soils Contaminated with Copper Using Electrokinetic Remediation

Hassan¹,

Mohamedelhassan²

2023

IJEPR

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“…Hal tersebut disebakan oleh lebih kuatnya kontaminan yang terserap dalam mineral dan fraksi organik tanah alami yang terkontaminasi maupun tanah yang telah lama terkontaminasi 13 . Kaolin memiliki kapasitas penyangga 15 dan kapasitas tukar kation yang lebih rendah dari mineral lainnya 17,15,21,23,24 . Kapasitas tukar kationnya yang rendah memfasilitasi karakterisasi remediasi elektrokinetik pada konsentrasi kontaminan dengan laju pertukaran ion yang cepat 19 .…”

Section: Diskusi Publikasi Remediasi Elektrokinetik Logam Berat Denga...unclassified

Sistematik Review: Perbandingan Penggunaan Kaolin dan Bentonit dalam Penelitian Remediasi Elektrokinetik untuk Penyisihan Logam Berat

Safitri

Budihardjo

Samadikun

2022

Jurnal Kesehatan Lingkungan Indonesia

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Latar belakang: Perbedaan mekanisme remediasi elektrokinetik salah satunya disebabkan oleh distribusi gugus ≡SOH yang berbeda beda pada jenis lempung yang dapat mengontrol muatan permukaan lempung. Bentonit dan kaolin merupakan jenis lempung yang seringkali digunakan dalam penelitian remediasi elektrokinetik tanah terkontaminasi logam berat. Oleh karenanya, tujuan dari review jurnal ini adalah mengkaji perbandingan penggunaan kaolin dan bentonit dalam remediasi elektrokinetik tanah terkontaminasi logam berat, baik dalam publikasi penelitiannya, karakteristiknya dan pengaruhnya terhadap mekanisme remediasi elektrokinetik.Metode: Metode yang digunakan dalam review jurnal ini adalah systematic literature review, yang terdiri dari tahap identifikasi kata kunci, screening dokumen terpublikasi dan pemilihan jurnal berdasarkan kriteria-kriteria tertentu. Data base yang digunakan berasal dari Scopus, Science Direct dan Springer. Dokumen yang telah terpilih selanjutnya dianalisis dan dibandingkan. Hasil: Sebanyak 92% dari dokumen terpilih menggunakan kaolin dalam peneltian EKR, sedangkan 8% lainnya menggunakan bentonit. Berdasarkan karakteristiknya, bentonit memiliki daya adsorbsi yang lebih tinggi dari kaolin, namun, memiliki efisiensi penyisihan yang lebih rendah dari kaolin. Dalam pengaruhnya terhadap mekanisme remediasi elektrokinetik, arah aliran EOF kaolin maupun bentonit pada umumnya menuju katoda, namun bentonit dapat menyerap elektrolit lebih banyak dari kaolin, sehingga memiliki kadar air yang lebih tinggi. Sedangkan untuk konsumsi energi, remediasi elektrokinetik pada kaolin memerlukan energi yang lebih rendah dari bentonit.Simpulan: Bentonit dan kaolin memiliki perbedaan karakteristik pada kapasitas adsorbsi, efisiensi penyisihan logam berat, dan konsumsi energi. Meskipun arah aliran EOF pada bentonit dan kaolin sama, namun kapasitas penyerapan elektrolit pada bentonit lebih besar dari kaolin. ABSTRACTTitle: Research Study on the Use of Kaolin and Bentonite in Electrokinetic Remediation for Heavy Metal RemovalBackground: One of the differences in the electrokinetic remediation mechanism is caused by the distribution of different ≡SOH groups on the type of clay that can control the surface charge of the clay. Bentonite and kaolin are types of clay that are often used in the study of electrokinetic remediation of heavy metal contaminated soils. Therefore, the purpose of this journal review is to compare the use of kaolin and bentonite in the electrokinetic remediation of heavy metal contaminated soils, both in their research publications, their characteristics and their effect on the electrokinetic remediation mechanism. Method: The method used in this journal review is a systematic literature review consisting of keyword identification, screening published documents and selecting journals based on certain criteria. The database used comes from Scopus, Science Direct and Springer. The selected documents are then analyzed and compared.Result: As many as 92% of the selected documents used kaolin in the EKR study, while 8% used bentonite. Based on its characteristics, bentonite has a higher adsorption capacity than kaolin. However, it has a lower removal efficiency than kaolin. In its influence on the electrokinetic remediation mechanism, the flow direction of kaolin and bentonite EOF is generally towards the cathode, but bentonite can absorb more electrolytes than kaolin, so it has higher water content. As for energy consumption, electrokinetic remediation on kaolin requires lower energy than bentonite.Conclusion: Bentonite and kaolin have different characteristics in adsorption capacity, heavy metal removal efficiency, and energy consumption. Although the direction of EOF flow in bentonite and kaolin is the same, the electrolyte absorption capacity of bentonite is greater than that of kaolin.

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“…Therefore, there is a need to render EMR non-hazardous and resourceful. The harmless treatment of electrolytic manganese slag mainly includes water washing [ 4 ], acid leaching [ 5 ], electrokinetic restoration [ 6 ], solidification/stabilization (solidification/stabilization, S/S) technology [ 7 ], and other routes. The first three methods have high processing costs and complex technical routes, with scholars now favoring efficient, energy-saving, easy-to-operate S/S technology; compared with other S/S technologies, geopolymers have the advantages of fast setting and early strengthening, good durability, inexpensive costs, and low carbon emissions, which have attracted the attention of researchers [ 8 , 9 , 10 ].…”

Section: Introductionmentioning

confidence: 99%

Synthesis of Electrolytic Manganese Slag–Solid Waste-Based Geopolymers: Compressive Strength and Mn Immobilization

Mi,

Zhao,

et al. 2024

Materials

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The massive stockpiling of electrolytic manganese residue (EMR) has caused serious environmental pollution. In this study, EMR, coal gangue (CG), and fly ash (FA) were used as raw materials to obtain the optimal mix ratio based on Design-Expert mixture design. The effects of activator modulus, liquid–solid (L/S) ratio, and curing temperature on the mechanical properties of geopolymers were investigated. The results showed that the compressive strength of the prepared geopolymer was 12.0 MPa, and the 28d leaching of Mn was 0.123 mg/L under the conditions of EMR:CG:FA = 0.43:0.34:0.23, L/S = 0.9, a curing temperature of 60 °C, and a curing time of 24 h. This indicates that the geopolymer is an environmentally friendly material with high compressive strength. The mineral composition of the geopolymer is mainly hydrated calcium silicate and geopolymer gel. In addition, a more stable new mineral phase, MnSiO3, was generated. The Fourier transform infrared (FTIR) spectrogram showed that the peak at 1100 m−1 was shifted to 1112 cm−1, which indicated that a geopolymerization reaction had occurred. Through scanning electron microscopy (SEM) and energy dispersive spectrum (EDS) analysis, it was identified that the geopolymerization produced a large amount of amorphous gelatinous substances with a relatively dense structure, the major elements being oxygen, silicon, aluminum, calcium, and sodium.

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Efficacy of Electrokinetics in Remediating Soft Clay Slurries Contaminated with Cadmium and Copper

Cited by 8 publications

References 31 publications

Restoration of Heterogeneous Soils Contaminated with Copper Using Electrokinetic Remediation

Restoration of Heterogeneous Soils Contaminated with Copper Using Electrokinetic Remediation

Sistematik Review: Perbandingan Penggunaan Kaolin dan Bentonit dalam Penelitian Remediasi Elektrokinetik untuk Penyisihan Logam Berat

Synthesis of Electrolytic Manganese Slag–Solid Waste-Based Geopolymers: Compressive Strength and Mn Immobilization

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