Preparation and characterization of an environmentally friendly compound chemical agent for road dust suppression in a copper mine

2020 ◽  
Author(s):  
Zhian Huang ◽  
Wei Zhao ◽  
Zhijun Yang ◽  
Jun Zhang ◽  
Yukun Gao ◽  
...  
Keyword(s):  
Environmentally Friendly ◽  
Road Dust ◽  
Chemical Agent ◽  
Dust Suppression ◽  
Copper Mine

scholarly journals Formulation Development and Performance Characterization of Ecological Dust Suppressant for Road Surfaces in Cities

2021 ◽  
Vol 11 (21) ◽  
pp. 10466
Author(s):  
Yuan Wang ◽  
Cuifeng Du ◽  
Mengmeng Cui
Keyword(s):  
Moisture Absorption ◽  
Environmentally Friendly ◽  
Road Dust ◽  
Raw Material ◽  
Retention Performance ◽  
Formulation Development ◽  
Performance Characterization ◽  
Material Sources ◽  
Road Surfaces

In order to solve the problem of road dust pollution, an ecological dust suppressant for road surfaces has been developed using monomer, orthogonal, and optimization experiments and based on the dust raising mechanism. A humectant, hygroscopic agent, coagulant and surfactant and their concentration ranges have been determined through monomer experiment. The preliminary formula of the dust suppressant has been obtained through orthogonal experiment, with the water loss rate, moisture content rate, viscosity value, and surface tension value serving as experimental indexes. The optimal formula for the dust suppressor has been calculated through an optimization experiment, with the toxicity, moisture absorption and retention performance of plants, and the relative damage rate of plant seeds serving as experimental indexes. Based on the performance characterization of ecological road dust suppressant, the ecologically and environmentally friendly dust suppressant demonstrates fine moisture absorption and retention performance, good wind and rain erosion resistance, and no toxicity. The ecological road dust suppressant developed herein covers extensive raw material sources. It is ecologically and environmentally friendly, fit for most urban roads, and has a fine dust suppression effect. Meanwhile, it also can bring in good economic and social benefits, demonstrating its broad application prospects.

scholarly journals Manufacturing and Characterization of Composite Fibreboards with Posidonia oceanica Wastes with an Environmentally-Friendly Binder from Epoxy Resin

Materials ◽  
2017 ◽  
Vol 11 (1) ◽  
pp. 35 ◽  
Author(s):  
Daniel Garcia-Garcia ◽  
Luis Quiles-Carrillo ◽  
Nestor Montanes ◽  
Vicent Fombuena ◽  
Rafael Balart
Keyword(s):  
Epoxy Resin ◽  
Environmentally Friendly ◽  
Posidonia Oceanica

Characterization of road dust collected in Traforo del San Bernardo highway tunnel: Fe and Mn speciation

2011 ◽  
Vol 45 (35) ◽  
pp. 6459-6468 ◽  
Author(s):  
Fabrizio Bardelli ◽  
Elti Cattaruzza ◽  
Francesco Gonella ◽  
Giancarlo Rampazzo ◽  
Gabrio Valotto
Keyword(s):  
Road Dust ◽  
Highway Tunnel ◽  
Fe And Mn

scholarly journals Assessing high-throughput environmental DNA extraction methods for meta-barcode characterization of aquatic microbial communities

2018 ◽  
Vol 17 (1) ◽  
pp. 37-49 ◽  
Author(s):  
Abdolrazagh Hashemi Shahraki ◽  
Subba Rao Chaganti ◽  
Daniel Heath
Keyword(s):  
Microbial Community ◽  
Microbial Communities ◽  
High Throughput ◽  
Environmentally Friendly ◽  
Environmental Dna ◽  
Magnetic Bead ◽  
Extraction Methods ◽  
Environmental Research ◽  
Rrna Gene

Abstract The characterization of microbial community dynamics using genomic methods is rapidly expanding, impacting many fields including medical, ecological, and environmental research and applications. One of the biggest challenges for such studies is the isolation of environmental DNA (eDNA) from a variety of samples, diverse microbes, and widely variable community compositions. The current study developed environmentally friendly, user safe, economical, and high throughput eDNA extraction methods for mixed aquatic microbial communities and tested them using 16 s rRNA gene meta-barcoding. Five different lysis buffers including (1) cetyltrimethylammonium bromide (CTAB), (2) digestion buffer (DB), (3) guanidinium isothiocyanate (GITC), (4) sucrose lysis (SL), and (5) SL-CTAB, coupled with four different purification methods: (1) phenol-chloroform-isoamyl alcohol (PCI), (2) magnetic Bead-Robotic, (3) magnetic Bead-Manual, and (4) membrane-filtration were tested for their efficacy in extracting eDNA from recreational freshwater samples. Results indicated that the CTAB-PCI and SL-Bead-Robotic methods yielded the highest genomic eDNA concentrations and succeeded in detecting the core microbial community including the rare microbes. However, our study recommends the SL-Bead-Robotic eDNA extraction protocol because this method is safe, environmentally friendly, rapid, high-throughput and inexpensive.

Research on Dust Suppression of a Copper Mine Underground Middle Level Crushing Station

2013 ◽  
Vol 726-731 ◽  
pp. 907-912
Author(s):  
Zong Yin Duan
Keyword(s):  
High Pressure ◽  
Middle Level ◽  
Dust Concentration ◽  
Dust Suppression ◽  
Copper Mine ◽  
Safety And Health

With long-term mining and new orebodies proved to be in the deep, the dust concentration of each mine underground operation site increased sharply, which is a serious threat to safety and health of workers in workspace. In this paper, a high pressure spray technology was put forward for dedusting on a mine underground middle crushing station[, and achieved the desired dedusting effect.

scholarly journals HEAVY METAL-RESISTANT RHIZOBACTERIA FROM GOLD MINE IN PONGKOR INDONESIA AND COPPER MINE IN MARINDUQUE PHILIPPINES

Agric ◽  
2019 ◽  
Vol 31 (1) ◽  
pp. 75-88 ◽  
Author(s):  
Erny Yuniarti ◽  
Ida F Dalmacio ◽  
Erlinda S Paterno
Keyword(s):  
Resistance Mechanism ◽  
Morphological Characterization ◽  
Gold Mine ◽  
Isolation Medium ◽  
Mine Site ◽  
Copper Mine ◽  
Gram Staining ◽  
16S Rna ◽  
Agar Media

The purposes of the study was to isolate, to characterize, and to identify rhizobacteria from plant rhizosphere growing in gold and copper mine. The isolation of rhizobacteria used N-free semisolid agar media, TSA, and SLP plus heavy metals (HMs), namely Pb, Cd, and or Cu. Isolated rhizobacteria were subsequently characterized for resistance to higher level of Pb, Cd, Cu in SLP media. Cultural and morphological characterization of rhizobacteria were conducted for cell morphology, motility, Gram staining, and biofilm formation. The rhizobacteria identification used sequence analysis of the 16S RNA gene fragments. The results showed that the majority of rhizobacterial from Cu mine site (66.7% of 21 isolates) were resistant to Cu (72150 ppm) while the majority of rhizobacteria from gold mine site (77.8% of 18 isolates) were sensitive to 72 ppm Cu. Majority of Cu in the soil was insoluble as granules attaching to gravel so that rhizobacteria of Cu mine site have been exposed and adapted to available Cu. This fact, explaining that the rhizobacteria’s MIC value was lower than the total Cu level in the soil. Three HMs-resistant rhizobacter (PbSM 2.1, MGR 334, and CuNFbM 4.1) formed biofilms, which was as one of the resistance mechanism to HMs. This research informed that HM contaminated-soil is better source for obtaining HM resistant rhizobacteria than HM uncontaminated-soil. The use four isolation media produce rhizobacteria which was more diverse than rhizobacteria from each isolation medium. Further characterization needs to be done to obtain HM resistant-rhizobacteria which can be used as biofertilizers and phytoremediation agent.

scholarly journals Production and characterization of sophorolipids produced by Candida bombicola from coconut oil

2016 ◽  
Vol 19 (4) ◽  
pp. 15-25
Author(s):  
Loan Quynh Le ◽  
Huy Duc Ngo ◽  
Khanh Quoc Hoang ◽  
Dung Hoang Nguyen ◽  
Dung Hoang Nguyen ◽  
...  
Keyword(s):  
Surface Tension ◽  
Coconut Oil ◽  
Environmentally Friendly ◽  
Candida Bombicola ◽  
Lower Toxicity ◽  
E Coli ◽  
Microbial Origin

The biosurfactants from microbial origin increasingly gained interests because of their application in many field and excellent properties compared to surfactants from chemical origin, such as the higher biodegradability, lower toxicity and environmentally friendly. Sophorolipids, biosurfactants of glycolipid groups are produced through the fermentation by nonpathogenic yeasts such as Candida bombicola. In this study, we investigated the production, surveyed properties of sophorolipids through fermentation by C. bombicola from coconut oil. The results showed that the yield of sophorolipid obtained after 7 days of culture was 14.6 g/L, the surface tension was 40 mN/m. The obtained sophorolipid showed ability to be resistant to some bacteria such as E. coli, B. subtilis, P. aeruginosa, and S. aureus. Through DPPH experiment, sophorolipids showed the scavenging acitivity with IC50 = 1.4063 mg/mL. These results showed that sophorolipids could be applied in cosmetics.

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