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Specific adsorption of cadmium on surface-engineered biocompatible organoclay under metal-phenanthrene mixed-contamination

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Specific adsorption of cadmium on surface-engineered biocompatible organoclay under metal-phenanthrene mixed-contamination. / Biswas, Bhabananda; Sarkar, Binoy; Mandal, Asit et al.
In: Water Research, Vol. 104, 01.11.2016, p. 119-127.

Research output: Contribution to Journal/Magazine › Journal article › peer-review

Harvard

Biswas, B, Sarkar, B, Mandal, A & Naidu, R 2016, 'Specific adsorption of cadmium on surface-engineered biocompatible organoclay under metal-phenanthrene mixed-contamination', Water Research, vol. 104, pp. 119-127. https://doi.org/10.1016/j.watres.2016.08.009

APA

Biswas, B., Sarkar, B., Mandal, A., & Naidu, R. (2016). Specific adsorption of cadmium on surface-engineered biocompatible organoclay under metal-phenanthrene mixed-contamination. Water Research, 104, 119-127. https://doi.org/10.1016/j.watres.2016.08.009

Vancouver

Biswas B, Sarkar B, Mandal A, Naidu R. Specific adsorption of cadmium on surface-engineered biocompatible organoclay under metal-phenanthrene mixed-contamination. Water Research. 2016 Nov 1;104:119-127. doi: 10.1016/j.watres.2016.08.009

Author

Biswas, Bhabananda ; Sarkar, Binoy ; Mandal, Asit et al. / Specific adsorption of cadmium on surface-engineered biocompatible organoclay under metal-phenanthrene mixed-contamination. In: Water Research. 2016 ; Vol. 104. pp. 119-127.

Bibtex

@article{06ca9d33397e446fb3e69cf161a9d973,
title = "Specific adsorption of cadmium on surface-engineered biocompatible organoclay under metal-phenanthrene mixed-contamination",
abstract = " Bioremediation of polycyclic aromatic hydrocarbons (PAHs) is extremely challenging when they coexist with heavy metals. This constrain has led to adsorption-based techniques that help immobilize the metals and reduce toxicity. However, the adsorbents can also non-selectively bind the organic compounds, which reduces their bioavailability. In this study we developed a surface-engineered organoclay (Arquad {\textregistered} 2HT-75-bentonite-palmitic acid) which enhanced bacterial proliferation and adsorbed cadmium, but elevated phenanthrene bioavailability. Adsorption models of single and binary solutes revealed that the raw bentonite adsorbed cadmium and phenanthrene non-selectively at the same binding sites and sequestrated phenanthrene. In contrast, cadmium selectively bound to the deprotonated state of carboxyl groups in the organoclay and phenanthrene on the outer surface of the adsorbent led to a microbially congenial microenvironment with a higher phenanthrene bioavailability. This study provided valuable information which would be highly important for developing a novel clay-modulated bioremediation technology for cleaning up PAHs under mixed-contaminated situations. ",
keywords = "Bioavailability, Bioremediation, Mixed contamination, Polycyclic aromatic hydrocarbon, Specific adsorption, Surface-engineered organoclay",
author = "Bhabananda Biswas and Binoy Sarkar and Asit Mandal and Ravi Naidu",
year = "2016",
month = nov,
day = "1",
doi = "10.1016/j.watres.2016.08.009",
language = "English",
volume = "104",
pages = "119--127",
journal = "Water Research",
issn = "0043-1354",
publisher = "Elsevier Ltd",

}

RIS

TY - JOUR

T1 - Specific adsorption of cadmium on surface-engineered biocompatible organoclay under metal-phenanthrene mixed-contamination

AU - Biswas, Bhabananda

AU - Sarkar, Binoy

AU - Mandal, Asit

AU - Naidu, Ravi

PY - 2016/11/1

Y1 - 2016/11/1

N2 - Bioremediation of polycyclic aromatic hydrocarbons (PAHs) is extremely challenging when they coexist with heavy metals. This constrain has led to adsorption-based techniques that help immobilize the metals and reduce toxicity. However, the adsorbents can also non-selectively bind the organic compounds, which reduces their bioavailability. In this study we developed a surface-engineered organoclay (Arquad ® 2HT-75-bentonite-palmitic acid) which enhanced bacterial proliferation and adsorbed cadmium, but elevated phenanthrene bioavailability. Adsorption models of single and binary solutes revealed that the raw bentonite adsorbed cadmium and phenanthrene non-selectively at the same binding sites and sequestrated phenanthrene. In contrast, cadmium selectively bound to the deprotonated state of carboxyl groups in the organoclay and phenanthrene on the outer surface of the adsorbent led to a microbially congenial microenvironment with a higher phenanthrene bioavailability. This study provided valuable information which would be highly important for developing a novel clay-modulated bioremediation technology for cleaning up PAHs under mixed-contaminated situations.

AB - Bioremediation of polycyclic aromatic hydrocarbons (PAHs) is extremely challenging when they coexist with heavy metals. This constrain has led to adsorption-based techniques that help immobilize the metals and reduce toxicity. However, the adsorbents can also non-selectively bind the organic compounds, which reduces their bioavailability. In this study we developed a surface-engineered organoclay (Arquad ® 2HT-75-bentonite-palmitic acid) which enhanced bacterial proliferation and adsorbed cadmium, but elevated phenanthrene bioavailability. Adsorption models of single and binary solutes revealed that the raw bentonite adsorbed cadmium and phenanthrene non-selectively at the same binding sites and sequestrated phenanthrene. In contrast, cadmium selectively bound to the deprotonated state of carboxyl groups in the organoclay and phenanthrene on the outer surface of the adsorbent led to a microbially congenial microenvironment with a higher phenanthrene bioavailability. This study provided valuable information which would be highly important for developing a novel clay-modulated bioremediation technology for cleaning up PAHs under mixed-contaminated situations.

KW - Bioavailability

KW - Bioremediation

KW - Mixed contamination

KW - Polycyclic aromatic hydrocarbon

KW - Specific adsorption

KW - Surface-engineered organoclay

U2 - 10.1016/j.watres.2016.08.009

DO - 10.1016/j.watres.2016.08.009

M3 - Journal article

C2 - 27522022

AN - SCOPUS:84981212611

VL - 104

SP - 119

EP - 127

JO - Water Research

JF - Water Research

SN - 0043-1354

ER -