Consecutively Preparing D-Xylose, Organosolv Lignin, and Amorphous Ultrafine Silica from Rice Husk

Rice husk is an abundant agricultural by-product reaching the output of 80 million tons annually in the world. The most common treatment method of rice husk is burning or burying, which caused serious air pollution and resource waste. In order to solve this problem, a new method is proposed to comprehensively utilize the rice husk in this paper. Firstly, the D-xylose was prepared from the semicellulose via dilute acid hydrolysis. Secondly, the lignin was separated via organic solvent pulping from the residue. Finally, the amorphous ultrafine silica was prepared via pyrolysis of the residue produced in the second process. In this way, the three main contents of rice husk (semicellulose, lignin, and silica) are consecutively converted to three fine chemicals, without solid waste produced. The yields of D-xylose and organosolv lignin reach 58.2% and 58.5%, respectively. The purity and specific surface of amorphous ultrafine silica reach 99.92% and 225.20 m2/g.

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Statistical Optimization of Dilute Acid Hydrolysis of Wood Sawdust for Lactic Acid Production

Journal of Applied Biotechnology & Bioengineering ◽

10.15406/jabb.2017.04.00093 ◽

2017 ◽

Vol 4 (1) ◽

Cited By ~ 1

Author(s):

Aicha Nancib

Keyword(s):

Lactic Acid ◽

Acid Hydrolysis ◽

Acid Production ◽

Lactic Acid Production ◽

Statistical Optimization ◽

Dilute Acid ◽

Dilute Acid Hydrolysis ◽

Wood Sawdust ◽

Hydrolysis Of

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Positive Aspects of COVID 19 Pandemic: A Blessing in Disguis

International Journal of Research in Pharmaceutical Sciences ◽

10.26452/ijrps.v11ispl1.2371 ◽

2020 ◽

Vol 11 (SPL1) ◽

pp. 187-191

Author(s):

Anjankar Ashish P ◽

Anjankar Vaibhav P ◽

Anjankar Anil J ◽

Kanyal Lata

Keyword(s):

Air Pollution ◽

Heart Attack ◽

Traffic Accidents ◽

Road Traffic ◽

Community Action ◽

Crime Rates ◽

Road Traffic Accidents ◽

Positive Effects ◽

Positive Side ◽

The World

COVID 19 is undeniably one of the deadliest diseases that humanity has ever seen. It continues to affect the lives and livelihood of people appallingly across the world. Maximum discussions focus towards the apprehension of catching the infection, dwelling in homes, overpopulated nursing homes and shut down of all kinds. But, here let’s discuss the positive side of COVID 19 pandemic.As COVID 19 has spread its influence all over the world, affected countries have either announced lockdown or have implemented severe restrictions in their respective countries. Because of this, everyone dwells in their homes. Thus, exercising social distancing and functioning from home. All of the above is directed at restricting the transmission of coronavirus and expectantly ostracising the fatality from COVID 19. These transformations have also brought about some unanticipated emanations; some good things have come out of the pandemic as well. Positive effects of COVID 19 are seen on reduced road traffic, and road traffic accidents lowered levels of air pollution which has to lead to lowered heart attack rates and rejuvenating environment. Crime rates have fallen, and expenses are reduced in most places. Community action, communication amongst families, behaviour, sanitation, hygiene, online and distance education has positively impacted by COVID 19 pandemic. COVID 19 despite a bane for humans, can be thought of a boon for living beings. The habitats and elements have been purified with the stringent use of petrochemical products. To breathe fresh air and to consume purified water is a boon by itself. Now, it is time for humans to lead a caring life to every bounty bestowed on them by Nature. This thoughtful and considerate life will give hope for a healthy, stress-free life.

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Air pollution and happiness: Evidence from the coldest capital in the world

Ecological Economics ◽

10.1016/j.ecolecon.2021.107085 ◽

2021 ◽

Vol 187 ◽

pp. 107085

Author(s):

Chimedregzen Sanduijav ◽

Susana Ferreira ◽

Mateusz Filipski ◽

Yukiko Hashida

Keyword(s):

Air Pollution ◽

The World

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The Vyredox and Nitredox Methods of in situ Treatment of Groundwater

Water Science & Technology ◽

10.2166/wst.1988.0093 ◽

1988 ◽

Vol 20 (3) ◽

pp. 149-163 ◽

Cited By ~ 30

Author(s):

Carol Braester ◽

Rudolf Martinell

Keyword(s):

Water Treatment ◽

Surface Water ◽

Traditional Method ◽

Treatment Method ◽

Nitrate Treatment ◽

The Past ◽

The World ◽

Nitrate And Nitrite ◽

Iron And Manganese

Nearly one fifth of all water used in the world is obtained from groundwater. The protection of water has become a high priority goal. During the last decades pollution of water has become more and more severe. Today groundwater is more and more used in comparison with surface water. Recently we have seen accidents, which can pollute nearly all surface water very quickly. Generally the groundwater is easier to protect, as well as cheaper to purify, and above all it is of better quality than the surface water. During the past two decades, alternatives to the traditional method of treating the water in filters have been developed, that is in situ water treatment i.e. the VYREDOX and NITREDOX methods. The most common problem regarding groundwater is too high content of iron and manganese, which can be reduced with the VYREDOX method. In some areas today there are severe problems with pollution by hydrocarbons and nitrate as well, and with modification of the VYREDOX treatment method it is used for hydrocarbon and nitrate treatment as well. The method to reduce the nitrate and nitrite is known as the NITREDOX method.

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Highlighting the compound risk of COVID-19 and environmental pollutants using geospatial technology

Scientific Reports ◽

10.1038/s41598-021-87877-6 ◽

2021 ◽

Vol 11 (1) ◽

Author(s):

Ram Kumar Singh ◽

Martin Drews ◽

Manuel De la Sen ◽

Prashant Kumar Srivastava ◽

Bambang H. Trisasongko ◽

...

Keyword(s):

Air Pollution ◽

Air Quality ◽

Global Economy ◽

Respiratory Diseases ◽

Environmental Pollutants ◽

Atmospheric Pollutants ◽

Geospatial Technology ◽

The World ◽

Community Transmission ◽

Global Threat

AbstractThe new COVID-19 coronavirus disease has emerged as a global threat and not just to human health but also the global economy. Due to the pandemic, most countries affected have therefore imposed periods of full or partial lockdowns to restrict community transmission. This has had the welcome but unexpected side effect that existing levels of atmospheric pollutants, particularly in cities, have temporarily declined. As found by several authors, air quality can inherently exacerbate the risks linked to respiratory diseases, including COVID-19. In this study, we explore patterns of air pollution for ten of the most affected countries in the world, in the context of the 2020 development of the COVID-19 pandemic. We find that the concentrations of some of the principal atmospheric pollutants were temporarily reduced during the extensive lockdowns in the spring. Secondly, we show that the seasonality of the atmospheric pollutants is not significantly affected by these temporary changes, indicating that observed variations in COVID-19 conditions are likely to be linked to air quality. On this background, we confirm that air pollution may be a good predictor for the local and national severity of COVID-19 infections.

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