scholarly journals Influence of indigenous mixotrophic bacteria on pyrite surface chemistry: Implications for bioflotation

2020 ◽  
Vol 14 (1) ◽  
pp. 1
Author(s):  
Edy Sanwani ◽  
Nuslia Bayangkara Lamandhi ◽  
Halimatul Husni ◽  
Siti Khodijah Chaerun ◽  
Widi Astuti ◽  
...  
Keyword(s):  
Surface Properties ◽  
Low Cost ◽  
Chemical Processes ◽  
Pyrite Surface ◽  
Bacterial Strains ◽  
Chemical Reagents ◽  
Experimental Systems ◽  
Index Value ◽  
Physical And Chemical ◽  
Potential Use

Given the low-cost and eco-friendly method, biotechnology has been widely utilized in industries as an alternative for physical and chemical processes, including in the biomining process (e.g., bioflotation and biobeneficiation). However, the use of biochemical reagent, which is selective for certain minerals, has not been well studied. This research was aimed to investigate the potential use of biosurfactant-producing mixotrophic bacteria as an alternative to chemical reagents during bioflotation and biobeneficiation process. Thirteen bacterial strains were investigated for their ability to produce biosurfactants and their effects on the surface properties of pyrite minerals. Bacteria-pyrite interaction experimental results showed that pyrite surface properties became more hydrophilic in the experimental systems inoculated with bacteria adapted with pyrite for 48 h than that without bacterial adaptation to pyrite, which was evidenced by the decrease in the contact angle of pyrite minerals by up to 50%. This evidence was also confirmed by the highest emulsifying index value (51.6%) attained during the bacteria-pyrite interaction. Hence, these bacteria can potentially be applied to selective flotation as pyrite depressants.

Status of the utilization of jack pine (Pinusbanksiana) in the pulp and paper industry

1994 ◽  
Vol 24 (10) ◽  
pp. 2078-2084 ◽  
Author(s):  
Kwei-Nam Law ◽  
Jacques L. Valade
Keyword(s):  
Paper Industry ◽  
Chemical Properties ◽  
Pulp And Paper Industry ◽  
Jack Pine ◽  
Chemical Processes ◽  
Future Research ◽  
Physical And Chemical Properties ◽  
Physical And Chemical ◽  
Potential Use ◽  
And Chemical Properties

Although jack pine (Pinusbanksiana Lamb.), which represents 20% of the total softwood volume, is one of the most abundant commercial softwood species in Canada, its rate of utilization in pulping is surprisingly low. This paper reviews the literature concerning the physical and chemical properties as well as the pulping characteristics of this species by mechanical, thermomechanical, chemithermomechanical, chemimechanical, and chemical processes to better understand its potential use in papermaking. The objective is to identify the problems related to the use of jack pine so that solutions might be sought to promote its usage. Some recommendations are put forth concerning future research.

scholarly journals Isolation and identification of proteolytic, amylolytic, lipolytic, and chitinolytic bacteria from shrimp waste

2021 ◽  
Vol 28 (1) ◽  
pp. e18353
Author(s):  
Susana Sirvas Cornejo ◽  
Vanesa Buleje ◽  
Licia Salvatierra ◽  
Michael L. Jaramillo
Keyword(s):  
Waste Treatment ◽  
Industrial Applications ◽  
Chemical Processes ◽  
Shrimp Waste ◽  
Bacterial Strains ◽  
Isolation And Identification ◽  
Microbial Enzymes ◽  
Chitinolytic Bacteria ◽  
By Products ◽  
Potential Use

Bacteria and microbial enzymes are biocatalysts and can be used as an alternative to industrial chemical processes. The present study focused on isolating and identifying bacterial strains from shrimp waste, that produce amylases, lipases, proteases and chitinases with potential use on shrimp waste treatment. Thirty-two bacterial strains were isolated, phenotypically characterized, and identified by the API system and the molecular analysis of the 16S rDNA. It was found that 28.13% of the isolated bacterial strains had amylolytic capacity, 87.50% lipolytic, 96.88% proteolytic and 28.13% chitinolytic capacity on agar plates with specific substrates. The genera Bacillus, Burkholderia, Ochrobactrum, Vibrio, Pseudomonas and Shewanella were identified. Bacteria with enzymatic capacities isolated in the present study, could be used to obtain by-products from shrimp waste as well as other industrial applications.

scholarly journals Biological decolourization of textile industry wastewater by a developed bacterial consortium

2019 ◽  
Vol 80 (10) ◽  
pp. 1910-1918
Author(s):  
Hewayalage Gimhani Madhushika ◽  
Thilini U. Ariyadasa ◽  
Sanja H. P. Gunawardena
Keyword(s):  
Textile Industry ◽  
Solid Phase ◽  
Bacterial Consortium ◽  
Chemical Processes ◽  
Biological Processes ◽  
Bacterial Strains ◽  
Morganella Morganii ◽  
Treatment Processes ◽  
Physical And Chemical ◽  
Industry Effluent

Abstract Most currently employed textile effluent decolourization methods use physical and chemical processes where dyes do not get degraded instead concentrated or transferred into a solid phase. Therefore, further treatment processes are required to destroy dyes from the environment. In contrast, biological decolourization may result in degradation of the dye structure due to microbial activities and hence biological processes can be considered environmentally friendly. In the present study, bacterial strains with dye decolourization potential were isolated from the natural environment and their ability to decolourize four different reactive textile dyes was studied individually and in a bacterial consortium. The developed bacterial consortium composed with Proteus mirabilis, Morganella morganii and Enterobacter cloacae indicated more than 90% color removals for all four dyes and optimum decolourization of the dye mixture was observed at 40 °C and pH 7. The developed bacterial consortium decolourized 60% of dyes in textile industry effluent at 35 °C and pH 7 showing their ability to endure in highly complex and toxic environments and application in textile industry wastewaters.

Nucleophilicity and its parametrization

1989 ◽  
Vol 54 (1) ◽  
pp. 117-135
Author(s):  
Oldřich Pytela ◽  
Vítězslav Zima
Keyword(s):  
Regression Analysis ◽  
Linear Correlation ◽  
Correlation Equation ◽  
Chemical Processes ◽  
General Tendency ◽  
Orbital Interaction ◽  
Physico Chemical ◽  
Physical And Chemical ◽  
Two Parameter ◽  
Better Than

The method of conjugate deviations based on the regression analysis has been suggested for construction of a new nucleophilicity scale. This method has been applied to a set of 28 nucleophiles participating in 47 physical and chemical processes described in literature. The two-parameter nucleophilicity scale obtained represents-in the parameter denoted as ND-the general tendency to form a bond to an electrophile predominantly on the basis of the orbital interaction and-in the parameter denoted as PD-the ability to interact with a centre similar to the proton (basicity). The linear correlation equation involving the ND, PD parameters and the charge appears to be distinctly better than the most significant relations used. The correlation dependences have the physico-chemical meaning. From the position of individual nucleophiles in the space of the ND and PD parameters, some general conclusions have been derived about the factors governing the reactivity of nucleophiles.

The Tree

2018 ◽  
Author(s):  
Andrew Steane
Keyword(s):  
Carbon Capture ◽  
Chemical Processes ◽  
Physical And Chemical

The life of an ordinary tree is described, in terms of the main physical and chemical processes: carbon capture by photosynthesis; entropy and energy; moisture. The information expressed in the tree comes partly from the DNA and partly from the sunlight. The tree does not push upwards from the ground, but solidifies the air.

scholarly journals Control of Physical and Chemical Processes with Nonlocal Metal–Dielectric Environments

ACS Photonics ◽  
2019 ◽  
Vol 6 (12) ◽  
pp. 3039-3056 ◽  
Author(s):  
Vanessa N. Peters ◽  
Srujana Prayakarao ◽  
Samantha R. Koutsares ◽  
Carl E. Bonner ◽  
Mikhail A. Noginov
Keyword(s):  
Chemical Processes ◽  
Physical And Chemical

scholarly journals A review of biomass materials for advanced lithium–sulfur batteries

2019 ◽  
Vol 10 (32) ◽  
pp. 7484-7495 ◽  
Author(s):  
Huadong Yuan ◽  
Tiefeng Liu ◽  
Yujing Liu ◽  
Jianwei Nai ◽  
Yao Wang ◽  
...  
Keyword(s):  
Recent Progress ◽  
Low Cost ◽  
High Abundance ◽  
Chemical Adsorption ◽  
Environmental Friendliness ◽  
Lithium Sulfur Batteries ◽  
Biomass Materials ◽  
Physical And Chemical ◽  
Lithium Sulfur

This review summarizes recent progress of biomass-derived materials in Li–S batteries. These materials are promising due to their advantages including strong physical and chemical adsorption, high abundance, low cost, and environmental friendliness.

scholarly journals Magnetic iron oxide/clay nanocomposites for adsorption and catalytic oxidation in water treatment applications

2020 ◽  
Vol 18 (1) ◽  
pp. 1148-1166
Author(s):  
Ganjar Fadillah ◽  
Septian Perwira Yudha ◽  
Suresh Sagadevan ◽  
Is Fatimah ◽  
Oki Muraza
Keyword(s):  
Iron Oxide ◽  
Water Treatment ◽  
Photocatalytic Oxidation ◽  
Low Cost ◽  
Synthesis Method ◽  
Chemical Oxidation ◽  
Magnetic Iron Oxide ◽  
Oxidation Processes ◽  
Recent Developments ◽  
Physical And Chemical

AbstractPhysical and chemical methods have been developed for water and wastewater treatments. Adsorption is an attractive method due to its simplicity and low cost, and it has been widely employed in industrial treatment. In advanced schemes, chemical oxidation and photocatalytic oxidation have been recognized as effective methods for wastewater-containing organic compounds. The use of magnetic iron oxide in these methods has received much attention. Magnetic iron oxide nanocomposite adsorbents have been recognized as favorable materials due to their stability, high adsorption capacities, and recoverability, compared to conventional sorbents. Magnetic iron oxide nanocomposites have also been reported to be effective in photocatalytic and chemical oxidation processes. The current review has presented recent developments in techniques using magnetic iron oxide nanocomposites for water treatment applications. The review highlights the synthesis method and compares modifications for adsorbent, photocatalytic oxidation, and chemical oxidation processes. Future prospects for the use of nanocomposites have been presented.

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