scholarly journals Remediation and Biological Activity of Nano Zero-valent Iron Supported by Biomass Carbon on Soil Contaminated With Polybrominated Diphenyl Ethers

2021 ◽  
Author(s):  
Zhen Xu ◽  
Chao Song ◽  
Yue Zhu ◽  
Chi Zhang ◽  
Xiaoyue Huang
Keyword(s):  
Biological Activity ◽  
Removal Efficiency ◽  
Contaminated Soil ◽  
Polybrominated Diphenyl Ethers ◽  
Basal Respiration ◽  
Zero Valent Iron ◽  
Biomass Carbon ◽  
Soil Systems ◽  
Diphenyl Ethers ◽  
Bde 209

Abstract Polybrominated diphenyl ethers (PBDEs) are toxic to humans and can easily accumulate in the environment. Nanoscale zero-valent iron (NZVI) and modified NZVI have been developed to remediate PBDE contamination. However, their degradation in soil systems and their microbial toxicity have not been widely explored. In this study, NZVI supported on biomass carbon was applied to remove decabromodiphenyl ether (BDE-209) from contaminated soil. A removal efficiency of 100% was achieved within 384 h as BDE-209 reacted with 0.10 g/g soil biomass carbon NZVI particles (BC–NZVI) at pH 7.00. The reaction followed pseudo-first-order kinetics, and the BDE-209 removal efficiency increased with increasing BC–NZVI dosage and decreasing initial BDE-209 concentration, pH, and moisture content. Biological activity assays (dehydrogenase activity and soil basal respiration) were conducted to provide a preliminary risk assessment of the BC–NZVI application in BDE-209 contaminated soil. The results demonstrate that BC–NZVI has a strong potential for in situ remediation of organic-contaminated soil.

Profiles and removal efficiency of polybrominated diphenyl ethers by two different types of sewage treatment work in Hong Kong

2015 ◽  
Vol 505 ◽  
pp. 261-268 ◽  
Author(s):  
Yu Bon Man ◽  
Ka Lai Chow ◽  
Ming Man ◽  
James Chung Wah Lam ◽  
Frankie Tat Kwong Lau ◽  
...  
Keyword(s):  
Hong Kong ◽  
Removal Efficiency ◽  
Polybrominated Diphenyl Ethers ◽  
Sewage Treatment ◽  
Diphenyl Ethers ◽  
Different Types

Synergy Remediation of PBDEs Contaminated Soil by Electric-Magnetic Method

2013 ◽  
Vol 726-731 ◽  
pp. 2338-2341 ◽  
Author(s):  
Chun Du Wu ◽  
Yi Fan Yao ◽  
Qing Jie Xie
Keyword(s):  
Magnetic Field ◽  
Contaminated Soil ◽  
Polybrominated Diphenyl Ethers ◽  
Uniform Magnetic Field ◽  
Uniform Electric Field ◽  
Magnetic Method ◽  
Acid Base ◽  
Ph Values ◽  
Diphenyl Ethers ◽  
Soil Area

An electrokinetic and magnetic remediation system of polybrominated diphenyl ethers (PBDEs) contaminated soil was built in the laboratory. The characteristics of BDE15 migration under non-uniform electric field and uniform magnetic field were investigated. The results indicated that current and temperature in the soil reached the maximum values 100mA and 14°C respectively in 6h; the moisture content of soil near the cathode and anode was higher than in the middle position; pH values of soil increased gradually from the anode to the cathode and acid-base interface was in the soil area between 3cm from anode and 5 cm from anode; BDE15 mainly enriched in the area 5cm from the anode and reached 22.69μg·g-1.

scholarly journals A Fluorescence-Based Method for Rapid and Direct Determination of Polybrominated Diphenyl Ethers in Water

2015 ◽  
Vol 2015 ◽  
pp. 1-10 ◽  
Author(s):  
Huimei Shan ◽  
Chongxuan Liu ◽  
Zheming Wang ◽  
Teng Ma ◽  
Jianying Shang ◽  
...  
Keyword(s):  
Fluorescence Spectroscopy ◽  
Polybrominated Diphenyl Ethers ◽  
Environmental Variables ◽  
Fluorescence Spectra ◽  
Direct Determination ◽  
Spectral Signal ◽  
Diphenyl Ethers ◽  
Spectral Profiles ◽  
Bde 209

A new method was developed for rapid and direct measurement of polybrominated diphenyl ethers (PBDEs) in aqueous samples using fluorescence spectroscopy. The fluorescence spectra of tri- to deca-BDE (BDE 28, 47, 99, 153, 190, and 209) commonly found in environment were measured at variable emission and excitation wavelengths. The results revealed that the PBDEs have distinct fluorescence spectral profiles and peak positions that can be exploited to identify these species and determine their concentrations in aqueous solutions. The detection limits as determined in deionized water spiked with PBDEs are 1.71–5.82 ng/L for BDE 28, BDE 47, BDE 190, and BDE 209 and 45.55–69.95 ng/L for BDE 99 and BDE 153. The effects of environmental variables including pH, humic substance, and groundwater chemical composition on PBDEs measurements were also investigated. These environmental variables affected fluorescence intensity, but their effect can be corrected through linear additivity and separation of spectral signal contribution. Compared with conventional GC-based analytical methods, the fluorescence spectroscopy method is more efficient as it only uses a small amount of samples (2–4 mL), avoids lengthy complicated concentration and extraction steps, and has a low detection limit of a few ng/L.

scholarly journals Simultaneous Determination and Preliminary Source Estimation of Polychlorinated Biphenyls and Polybrominated Diphenyl Ethers in Road Dust from Northern Vietnam

2021 ◽  
Vol 37 (1) ◽  
Author(s):  
Hoang Quoc Anh ◽  
Shin Takahashi ◽  
Pham Thi Ngoc Mai ◽  
Thai Thu Thuy ◽  
Nguyen Thi Thanh Huong
Keyword(s):  
Polychlorinated Biphenyls ◽  
Polybrominated Diphenyl Ethers ◽  
Road Dust ◽  
Northern Vietnam ◽  
Industrial Dust ◽  
Source Estimation ◽  
Diphenyl Ethers ◽  
Outdoor Dust ◽  
Bde 209

Concentrations of seven indicator polychlorinated biphenyls (Ʃ7PCBs) and eight predominant polybrominated diphenyl ethers (Ʃ8PBDEs) were examined in outdoor dust samples collected from some representative areas in northern Vietnam, including a core urban area of Hanoi City, an industrial park in Thai Nguyen Province, and a rural area in Bac Giang Province. Levels (median and range) of Ʃ7PCBs and Ʃ8PBDEs in our dust samples were 2.8 (0.028–22) and 11 (0.55–52) ng/g, respectively. Concentrations of PCBs and PBDEs in the urban and industrial dust samples were significantly higher than those measured in the rural ones, suggesting the role of urbanization-industrialization processes on the emission of these pollutants. PCBs exhibited specific profiles in the industrial dusts with significant proportions of low-chlorinated congeners such as CB-28 and CB-52, while the remaining samples were more contaminated by heavier compounds such as CB-118, CB-138, and CB-153. For PBDEs, BDE-209 was the most predominant congener in all the samples. Emission souces of PCBs and PBDEs in our dust samples were estimated to be household, traffic, and industrial activities. Human exposure to PCBs and PBDEs in outdoor dusts was estimated, implying relatively low health risk.

Effect of Pb2+, Cd2+, Cu2+ and dissolved organic carbon (DOC) on the distribution and partition of decabromodiphenyl ether (BDE-209) in a water–sediment system

RSC Advances ◽  
2015 ◽  
Vol 5 (127) ◽  
pp. 105259-105265
Author(s):  
Donggao Yin ◽  
Hui Peng ◽  
Hua Yin ◽  
Su Zhou ◽  
Shichang Xiong ◽  
...  
Keyword(s):  
Heavy Metals ◽  
Organic Carbon ◽  
Dissolved Organic Carbon ◽  
Polybrominated Diphenyl Ethers ◽  
Electronic Waste ◽  
Combined Pollution ◽  
Decabromodiphenyl Ether ◽  
System P ◽  
Diphenyl Ethers ◽  
Bde 209

The combined pollution of polybrominated diphenyl ethers (PBDEs) and heavy metals in electronic waste dismantling areas has received increasing concern in recent years.

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