Results 71 to 80 of about 700 (208)
Trace Elements Content of Mangium Pulp Throughout ECF Bleaching Stages as Measured by ICP [PDF]
, 2015 The fate of metals in pulp of the five years old mangium wood (Acacia mangium Wild) during bleaching process was investigated. The wood was divided into tree division, i.e. bottom, middle and upper divisions.
Wistara, N. (Nyoman), Nurmala, D. (Devi)
core
Impact of kaolin filler on physical and mechanical paper properties formed by ECF pulp [PDF]
, 2014 The paper industry is the main global consumer of kaolin. It is mostly used as paper filler, due to its lower cost as compared to pulp cost. Color removal process from pulp - chemical bleaching - determines final pulp's characteristics.
Favaro, Jaqueline Silveira Comelato [UNESP] +15 more
core +1 more source
Environmental DNA, Volume 6, Issue 6, November–December 2024.We compared eDNA metabarcoding and underwater visual census (UVC) to monitor biodiversity across habitat transitions in the complex, low‐visibility coastal waters of urban Hong Kong. While eDNA detected broader species richness and unique taxa, UVC focused on reef species with high site fidelity.
Arthur Chung +3 more
wiley +1 more source
Branqueamento de polpa de eucalipto com sequências curtas
Ciência Florestal, 2011 Eucalyptus spp kraft pulp, due to its high content of hexenuronic acids, is quite easy to bleach. Therefore, investigations have been made attempting to decrease the number of stages in the bleaching process in order to minimize capital costs. This study
Flaviana Reis Milagres +3 more
doaj
Evaluation of Eucalyptus KRAFT-AQ ECF and TCF pulps [PDF]
, 1998 Devido à descoberta de componentes tóxicos nos efluentes de indústria de celulose provenientes do cloro, utilizado na etapa de branqueamento de polpa química, grande pressão ambiental começou a atuar sobre o setor.
Gomes, Isabel Menezes de Bulhões
core
BioResources, 2023 Effects of pre-treating pine kraft pulp kappa number 31.5 with peracetic acid (Paa) (0.33% and 0.66% as active oxygen based on oven-dried pulp) before O2-delignification were studied relative to the consumption of chlorine dioxide in a subsequent ...
Dariusz Danielewicz
doaj +2 more sources
ECF bleaching of eucalyptus kraft pulp : simulation of a mill with a high degree of closure [PDF]
, 2017 The composition of non-process elements (NPEs) in wood significantly affects the level of metals in the pulp in the bleach plant and contributes to the risk of forming precipitates.
Lindgren, Karin, +2 more
core
BioResources, 2010 Investigation of last stage bleaching with peracetic acid is the main subject of this paper. Proper conditions were established to apply peracetic acid as the last bleaching stage of the D(Ep)D/Paa, DHT(Ep)D/Paa, A/D(Ep)D/Paa, DHT/Q(PO)Paa and Z/ED/Paa ...
Denise P. Barros +3 more
doaj
ECF Bleaching of Softwood and Eucalyptus Pulps- a Comparative Study
JAPAN TAPPI JOURNAL, 2003 This paper deals with a comparison in ECF bleaching and effluent characterisation of kraft pulps based on softwood and eucalyptus. The study is made for both conventional and oxygen delignified pulps.There are similarities in the bleaching of softwood and eucalyptus looking at the bleaching parameters.
Mealier, Lennart +3 more
openaire +2 more sources
Ultrafast Spectroelectrochemistry of the Catechol/o‐Quinone Redox Couple in Aqueous Buffer Solution
ChemPhotoChem, Volume 8, Issue 9, September 2024.The transient absorption spectroelectrochemistry of the catechol/o‐quinone redox couple was studied in aqueous buffer solution. This method offers an accessible approach to electrochemically generate and analyse unstable redox species, here o‐quinone.
Sofia Goia +9 more
wiley +1 more source