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Chen, Hsin-Yu; Chen, Zueng‐Sang; Tsai, Chen-Chi; Tsui, Chun-Chih; Cheng, Shuang-Fu; Liu, Chyan-Lan; Lin, Haw-Tarn

doi:10.1023/a:1021302405128

Cited by 132 publications

(33 citation statements)

References 10 publications

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“…Next, the residues was dissolved with hydrochloric acid, filtered and diluted with deionized water. Finally, the concentrations of the metals (Cu, Zn, Pb, Cr, Cd, and Ni) of diluted solution were determined by flame atomic absorption spectrometry (AAS, Solaar-MK II-M6, Thermo Elemental, Fisher Scientific Inc. Toronto, ON, USA) [25,26]. Each soil sample was measured in triplicate and every step of measurements was optimized to meet the quality control standards.…”

Section: Methodsmentioning

confidence: 99%

Influence of Heavy Metals and PCBs Pollution on the Enzyme Activity and Microbial Community of Paddy Soils around an E-Waste Recycling Workshop

Tang

Hashmi

Long

et al. 2014

IJERPH

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Due to the emerging environmental issues related to e-waste there is concern about the quality of paddy soils near e-waste workshops. The levels of heavy metals and PCBs and their influence on the enzyme activity and microbial community of paddy soils obtained from the immediate vicinity of an e-waste workshop were investigated in the present study. The results indicated that the heavy metal and PCB pollution did not differ significantly with an increase of the sampling point distances (5 to 30 m). The concentration of Cd (2.16 mg·kg−1) and Cu (69.2 mg·kg−1) were higher, and the PCB pollution was also serious, ranging from 4.9 to 21.6 μg·kg−1. The highest enzyme activity was found for urease compared to phosphatase and catalase, and a fluctuating trend in soil enzyme activity was observed in soils from different sampling sites. The microbial analysis revealed that there was no apparent correlation between the microbial community and the pollutants. However, a slight influence for soil microbial communities could be found based on DGGE, the Shannon index and PCA analysis. The present study suggests that the contamination stress of heavy metals and PCBs might have a slight influence on microbial activity in paddy soils. This study provides the baseline data for enzyme activities and microbial communities in paddy soil under the influence of mixed contamination.

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Section: Methodsmentioning

confidence: 99%

Influence of Heavy Metals and PCBs Pollution on the Enzyme Activity and Microbial Community of Paddy Soils around an E-Waste Recycling Workshop

Tang

Hashmi

Long

et al. 2014

IJERPH

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“…19 Os extratos obtidos pela digestão nítrico-perclórica (DNP) apresentaram coloração transparente, sem sinais visíveis de material residual, para todos os resíduos estudados. Em alguns casos, como na digestão do material húmico, substrato orgânico e composto orgâni-co, foi necessário adicionar mais 4 mL de ácido nítrico, além dos 6 mL iniciais, para uma digestão completa da matriz orgânica.…”

Section: Resultsunclassified

“…10 Entretanto, pouco se conhece sobre a recuperação relativa de elementos a partir de compostos orgânicos por vários méto-dos de digestão. 3 Daí, a importância de se testar diferentes metodologias em sistemas fechados e abertos, para uma grande variedade de matrizes orgânicas, no sentido de se caracterizar com mais eficiência esses materiais que são largamente empregados na adubação das lavouras.…”

Section: Introductionunclassified

Influência de métodos de digestão e massa de amostra na recuperação de nutrientes em resíduos orgânicos

Melo¹,

Silva²

2008

Quím. Nova

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“…Contents of carbon, hydrogen, oxygen, nitrogen, and sulfur were obtained in a PerkinElmer 2400 Series II Elemental Analyzer. Metallic content (Al, As, B, Ba, Ca, Cd, Co, Cu, Fe, K, Mg, Mn, Mo, Ni, P, Pb, and Zn) was determined with an ICPE-9000 Multitype ICP Emission Spectrometer (Shi-madzu®, Tokyo, Japan) following the methods of Hseu et al [34]. Proximate analysis for moisture, volatile solids, ashes, and fixed carbon was carried out in a TGA7 Thermogravimetric Analyzer (PerkinElmer, Massachusetts, USA).…”

Section: Chemical Propertiesmentioning

confidence: 99%

Evaluating adsorbent properties of drinking water treatment plant sludge-based carbons activated by K2CO3/CH3COOH: a low-cost material for metal ion remediation

et al. 2019

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Sludge reclaimed from drinking water treatment plant was carbonized and chemically activated by K 2 CO 3 and CH 3 COOH. The proposal was to evaluate its adsorbent properties as a low-cost alternative material for metal ion remediation. Morphological, physicochemical, and chemical characteristics have been presented and comprehensively discussed. Main findings revealed a surface area rich in mesopores and loaded with weakly acidic functional groups, also presenting an eroded aspect. Carbonization of the sludge's organic content increased the concentration of nitrogenic and oxygenated functional surface groups. Chemical activation by K 2 CO 3 and CH 3 COOH increased adsorption and desorption capacity, pore volume, and pore size by two, three, and over tenfolds, respectively. Uptake of cations increased by 51% and, for anions, around 27%. Association of carbonization with sequenced activation processes converted drinking water treatment plant sludge into an excellent and promising alternative adsorbent material. and activation is available on the literature. Considering the lack of studies regarding the production of activated carbons from DWTP sludge, this study reports the conversion of this widely available feedstock through carbonization and chemical activation.Activated carbons (AC) are scientifically known for having high sorption capacity for different types of chemical species [28], a characteristic of an adsorbent material with large surface area, porous structure, and chemically active surface [29]. Additionally, the high concentration of metals in raw water treatment sludge and, consequently, in its char, may also improve ion-solution interaction. Activated carbons usually have their surface functional groups bonded to complex aromatic rings, behaving similarly to aromatic hydrocarbons [30]. As so, a thermochemical modification would then improve these characteristics in the AC's surface chemistry, as a function of the usage purpose. Overall, the chemical activation of carbonized materials'

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Cited by 132 publications

References 10 publications

Influence of Heavy Metals and PCBs Pollution on the Enzyme Activity and Microbial Community of Paddy Soils around an E-Waste Recycling Workshop

Influence of Heavy Metals and PCBs Pollution on the Enzyme Activity and Microbial Community of Paddy Soils around an E-Waste Recycling Workshop

Influência de métodos de digestão e massa de amostra na recuperação de nutrientes em resíduos orgânicos

Evaluating adsorbent properties of drinking water treatment plant sludge-based carbons activated by K2CO3/CH3COOH: a low-cost material for metal ion remediation

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