東華大學圖書館 |

語系: 繁體中文

說明(常見問題)

回圖書館首頁

手機版館藏查詢

登入

回首頁

切換: 標籤 | MARC模式 | ISBD

Fate and Reactivity of Lignin in Mun...

De la Cruz, Florentino B.

FindBook

Google Book

Amazon

博客來

Fate and Reactivity of Lignin in Municipal Solid Waste (MSW) Landfill.

紀錄類型:	書目-電子資源 : Monograph/item
正題名/作者:	Fate and Reactivity of Lignin in Municipal Solid Waste (MSW) Landfill./
作者:	De la Cruz, Florentino B.
面頁冊數:	192 p.
附註:	Source: Dissertation Abstracts International, Volume: 75-06(E), Section: B.
Contained By:	Dissertation Abstracts International75-06B(E).
標題:	Environmental engineering. -
電子資源:	http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=3586097
ISBN:	9781303798597

Fate and Reactivity of Lignin in Municipal Solid Waste (MSW) Landfill.
De la Cruz, Florentino B.

Fate and Reactivity of Lignin in Municipal Solid Waste (MSW) Landfill. - 192 p.

Source: Dissertation Abstracts International, Volume: 75-06(E), Section: B.

Thesis (Ph.D.)--North Carolina State University, 2014.

This item must not be sold to any third party vendors.

More than 50% of the 149 million metric tons of municipal solid waste (MSW) landfilled in the U.S. annually are derived from lignocellulosic materials (e.g. food and yard waste, wood, and pulp and paper products). As lignin is approximately 15% of residential solid waste, understanding its behavior during anaerobic decomposition in landfills is important for a complete description of carbon decomposition and storage in landfills. The overall objective of this dissertation was to use lignin in characterizing the decomposition of lignocellulose during anaerobic decomposition. This document is divided in three major sections to address (1) work to explore CuO oxidation as an alternative analytical method to improve quantification of lignin; (2) use of CuO lignin monomers as molecular markers to quantitatively estimate the amount of lignocellulose in mixed samples and; (3) to evaluate the chemical transformations of lignin during mesophilic and thermophilic anaerobic decomposition.

ISBN: 9781303798597Subjects--Topical Terms:

548583
Environmental engineering.

Fate and Reactivity of Lignin in Municipal Solid Waste (MSW) Landfill.
LDR:05097nmm a2200349 4500 001 2060737
005 20150924074407.5
008 170521s2014 ||||||||||||||||| ||eng d
020 $a 9781303798597
035 $a (MiAaPQ)AAI3586097
035 $a AAI3586097
040 $a MiAaPQ $c MiAaPQ
100 1 $a De la Cruz, Florentino B. $3 3174920
245 1 0 $a Fate and Reactivity of Lignin in Municipal Solid Waste (MSW) Landfill.
300 $a 192 p.
500 $a Source: Dissertation Abstracts International, Volume: 75-06(E), Section: B.
500 $a Adviser: Morton A. Barlaz.
502 $a Thesis (Ph.D.)--North Carolina State University, 2014.
506 $a This item must not be sold to any third party vendors.
506 $a This item must not be added to any third party search indexes.
520 $a More than 50% of the 149 million metric tons of municipal solid waste (MSW) landfilled in the U.S. annually are derived from lignocellulosic materials (e.g. food and yard waste, wood, and pulp and paper products). As lignin is approximately 15% of residential solid waste, understanding its behavior during anaerobic decomposition in landfills is important for a complete description of carbon decomposition and storage in landfills. The overall objective of this dissertation was to use lignin in characterizing the decomposition of lignocellulose during anaerobic decomposition. This document is divided in three major sections to address (1) work to explore CuO oxidation as an alternative analytical method to improve quantification of lignin; (2) use of CuO lignin monomers as molecular markers to quantitatively estimate the amount of lignocellulose in mixed samples and; (3) to evaluate the chemical transformations of lignin during mesophilic and thermophilic anaerobic decomposition.
520 $a To evaluate the feasibility of CuO oxidation as an alternate method to quantify lignin, experiments were conducted to evaluate potential for some common components of MSW to interfere with the CuO oxidation. Results showed the analysis of lignin phenols can be simplified by omission of the liquid -- liquid extraction step traditionally employed as a purification step for subsequent GC/MS analysis. The study also showed that plastics, metals and lipophilic extractives do not affect CuO lignin in mixed MSW. It was also demonstrated the CuO lignin of ball-milled samples were not significantly different when compared to the CuO lignin of samples ground to pass a 60 mesh screen in a Wiley mill. Application of CuO oxidation of lignin on excavated landfill samples showed that similar conclusions can be obtained by using the traditional indicator of decomposition (Cellulose [Cel] + Hemicellulose[H])/Klason Lignin [KL]) and a new ratio based on sum of eight phenolic monomers (Lambda 8) from CuO oxidation (Cel+H)/Lambda8. (Cel+H)/Lambda 8 in theory is more robust parameter in samples that may contain interferences as it is based on lignin specific measure. However, further study is necessary to explore the sensitivity and efficacy of (Cel+H)/E8 as a metric for the extent of MSW decomposition.
520 $a To evaluate the applicability of CuO oxidation to estimate lignocellulose composition, end member mixing model was developed and calibrated using data from 93 different species of hardwood (HW), softwood (SW), leaves and grasses (LG) and needles (GN). Relatively accurate predictions were demonstrated in pure tissues. Poor predictions of GN in synthetic mixtures could be attributed to the deviation of CuO lignin of the selected end-members used formulating the synthetic mixtures from the mean value which was used in model development. Application of the model to estimate composition of landfill samples showed that majority of samples are comprised of HW and SW or pulp derived from these materials.
520 $a To look for evidence of chemical transformations of lignin under mesophilic and thermophilic anaerobic conditions, Hardwood (HW), softwood (SW), grass and old newsprint (ONP) were decomposed in the laboratory and were analyzed both by chemical degradation and spectroscopic techniques. Significant carbon losses were observed in all materials with highest in grass (40% and 47% for mesophilic and thermophilic decomposition, respectively). For HW, grass and ONP, the carbon losses could be attributed primarily to cellulose and hemicellulose and some fraction of lignin. In SW, the carbon loss could be attributed to the uncharacterized carbon fractions (e.g. extractives etc.). 2D nuclear magnetic resonance (NMR) spectra showed slight reduction of beta-O-4 linkage in HW, grass and ONP. Klason and acid soluble lignin as well as CuO lignin data indicate no substantial de-polymerization suggesting that reactivity of lignin were limited to side chain with no destruction of the aromatic structure.
590 $a School code: 0155.
650 4 $a Environmental engineering. $3 548583
650 4 $a Forestry. $3 895157
650 4 $a Biochemistry. $3 518028
690 $a 0775
690 $a 0478
690 $a 0487
710 2 $a North Carolina State University. $3 1018772
773 0 $t Dissertation Abstracts International $g 75-06B(E).
790 $a 0155
791 $a Ph.D.
792 $a 2014
793 $a English
856 4 0 $u http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=3586097