| Global NEST Journal

Activated Biochar from Gracilaria Edulis Seaweeds: A Novel Biosorbent for Efficient Uranium Ion Removal in Wastewater Treatment

by Titus S. Karthick L. Kiruba S. Srithar A. Kumar Harish Karuna M.S.

Issue 8

Water and wastewater treatment and reuse

The biosorption of uranium ions was explored through batch studies employing activated biochar derived from Gracilaria Edulis seaweeds. A chemical synthesis approach utilizing concentrated sulfuric acid created and activated the adsorbent material. SEM and FTIR measurements were used to characterize...

Adsorption Gracilaria Edulis +4 more

Physicochemical Variation of Water, Diversity, and Bacterial Community Structure in Post-coal Mining Ponds of Different Ages in Samarinda, East Kalimantan, Indonesia

by

Eko Kusumawati et al. View all

Issue 5

Air pollution and health

This study aims to determine physicochemical variation of water, diversity, and community structure of bacteria at post-coal mining ponds of various ages located in Samarinda, East Kalimantan, Indonesia. Bacteria species were identified using a metagenomic approach on the Next-Generation Sequencing...

open-cut coal mining coal mine +3 more

Sustainable bio-oil from banana peel waste biomass: Optimization study and effect of thermal drying

by Chua Huang Shen Shabuddin Muhammad Faris Shah Bin Lee Kiat Moon Tat Tan Kok Bashir Mohammed JK

Issue 7

Solid Waste Management

Banana waste has a high level of volatile matter, making it a promising feedstock for pyrolysis in bio-oil generation. Thus, an oven drying method optimization study was conducted to find the drying process of Saba banana peel on flap opening and fan speed. Based on the ANOVA results, it was found...

banana peel CCD Optimization +3 more

Screening, Identification, and Optimization of Sulfur-Oxidizing Bacteria from Post-coal Mining Ponds of Different Ages in Samarinda, East Kalimantan, Indonesia

by

Eko Kusumawati et al. View all

Issue 3

Air pollution and health

This research was conducted to isolation, screening, identification, and culture conditions optimization (pH, temperature, thiosulfate concentration, and incubation period) of potential sulfur-oxidizing bacterial (SOB) to reduce sulfur concentrations in post-coal mining ponds water of various ages...

bioremediation coal mining +2 more

Conversion of the styrofoam waste into a high-capacity and recoverable adsorbent in the removing the toxic Pb(II) from water media

by

Wahyuni et al. View all

Issue 2

Water and wastewater treatment and reuse

The sequential nitration and magnetization of waste styrofoam to form a novel adsorbent has been investigated. The novelty of this study assigned approach lies in the introduction of an anionic surface on the styrofoam, enabling it to adsorb cationic Pb2+ ion, combined with its magnetic property...

Styrofoam magnetic +5 more

Anaerobic Digestion of Corn Stover Pretreated with Sulfuric Acid in Different Soaking Durations

by

Lukhi Mulia Shitophyta et al. View all

Issue 1

Solid Waste Management

The biogas production of pretreated corn stover has been determined in different soaking durations. Batch anaerobic digestion applies three different soaking durations in sulfuric acid pretreatment under room temperature. The study aimed to probe the effect of soaking durations during sulfuric acid...

acid pretreatment Biogas +3 more

Biosorption of crystal violet and methylene blue dyes using coconut shell powder

by

Sudhakar S et al. View all

Issue 1

Water and wastewater treatment and reuse

In this study, coconut shell biosorbent was synthesized through chemical processes and activated using concentrated sulfuric acid to serve as an organic adsorbent for the effective removal of dye molecules, particularly Crystal Violet (CV) and Methylene Blue (MB), from wastewater. The biosorbent's...

Biosorption Coconut shells +3 more

A deep learning model and optimization algorithm to forecasting Environment Monitoring of the Air pollution

by

R.Jayamala et al. View all

Issue 10

Air pollution and health

Air pollution monitoring is becoming increasingly important, with an emphasis on the effects on human health. Because nitrogen dioxide (NO2) and sulphur dioxide (SO2) are the principal pollutants, many models for forecasting their potential harm have been created. Nonetheless, making precise...

Artificial Neural Network sulfur dioxide +2 more

Biosorption potential of neem leave powder for the sequestration of arsenic and chromium metal ions

by

Kousalyadevi G et al. View all

Issue 10

Water and wastewater treatment and reuse

In this study, neem leaf biosorbent, prepared through chemical synthesis and activated with concentrated sulfuric acid, was utilized as an organic adsorbent for the removal of heavy metal ions, specifically arsenic (As) and chromium (Cr), from wastewater. The characteristics of the biosorbent were...

Biosorption Neem laves +3 more

Implementation a combination of bio-desulfusization and trickling filtration technologies with a variety of coconut shell charcoal filter media in reducing the content of H2S and TSS in the leather-based clothing industry

by

Elanda Fikri et al. View all

Issue 3

Water and wastewater treatment and reuse

Waste generated as a result of the leather processing industry can be in the form of solid, liquid and gas waste. Waste generated from the textile industry made from clothing H2S and TSS which if not treated properly, will be very dangerous for health and the environment. One of the efforts to...

Bio-Desulfurization Trickling Filter +2 more

Batch and Packed Bed Column Studies of Azo Dyes Adsorption from the Aqueous Solutions Using Activated Sugarcane Bagasse Charcoal Adsorbent: Isotherm and Kinetic Studies

by

D. Zunaithur Rahman et al. View all

Issue 1

Water and wastewater treatment and reuse

Biosorption of azo dyes (RO-16, RB-120 & RB-19) from the aqueous solutions was investigated using the activated sugarcane bagasse charcoal adsorbent. The characteristics of the prepared adsorbent were analyzed by SEM, EDX, FTIR, XRD, TG & DT analysis, and the BET surface area of the sugarcane...

Azo dyes Batch and column studies +3 more

Biosorption of heavy metal ions from the aqueous solutions using groundnut shell activated carbon: batch adsorption, kinetic and thermodynamic studies

by

D. Zunaithur Rahman et al. View all

Issue 4

Water and wastewater treatment and reuse

Batch adsorption studies of heavy metals were carried out using activated charcoal groundnut shell powder as an adsorbent material. The groundnut shell was collected and synthesized by chemical synthesis to convert it into charcoal form. The prepared adsorbent’s pore size & surface area was analyzed...

Industrial effluent Heavy metals +4 more

The Conversion of SO2 by Hydrogen Oxidation Branching Vhain Reaction

by

Arutyunyan A. et al. View all

Issue 4

Air pollution and health

The Conversion of SO2 by Hydrogen Oxidation Branching Chain Reaction A.A. Arutyunyan Institute of Chemical Physics after A.B. Nalbandyan NAS of The Republic of Armenia, 5/2 Paruyr Sevak St., Yerevan 0014, Republic of Armenia E-mail: harhasmik@mail.ru The process of SО2 conversion in the hydrogen...

Key words: sulfur sulfur dioxide +3 more

Nano Sensor for Near Zero Emission Monitoring of Sulfur Hexafluoride

by

Lijun Zhang et al. View all

Issue 2

CLEANWAS

Aiming at the problems of long monitoring time, low sensitivity and low precision of traditional methods, a nano sensor for near zero emission monitoring of sulfur hexafluoride (SF6) was proposed. The characteristics of SF6 gas were analyzed. The infrared spectrum of SF6 gas was obtained by spectral...

Nanosensor Sulfur Hexafluoride +3 more

Enhanced photocatalytic degradation of Remazol Black under visible light illumination through S doped TiO2 (S-TiO2) nanoparticles: Operational factors and kinetic study

by

Endang Tri Wahyuni et al. View all

Issue 2

Water and wastewater treatment and reuse

The degradation of Remazol Black (RBB) by S-TiO2 photocatalyst was investigated. X-ray diffraction, fourier-transform infrared spectroscopy, scanning electron microscopy, transmission electron microscopy, and UV-vis specular reflectance spectroscopy has been used to characterize S-TiO2. The results...

Kinetic photocatalyst +3 more

Modification of Corn stalk for high-performance adsorption of Coomassie Brilliant blue dye in simulated polluted water: Kinetic study

by

Nahla. A. Taha, Ahmed. Zattot, Eman Mohamed

Issue 2

Water and wastewater treatment and reuse

In the present work, corn stalk was used as a low cost adsorbent for removal of anionic dye (" CBB"). Corn stalk was treated with two methods to inform Modified corn stalk with magnetic particles (MMCS) and Modified corn stalk with sulfuric acid (SMCS). Comparison between raw and treated corn stalk...

Coomassie Brilliant blue anionic dye +3 more

Analysis of Spatial-temporal and Ion Characteristics Change of Precipitation in the Southwest of China, from Policy Perspective

by

Renjiang He et al. View all

Issue 2

Air pollution and health

According to the data from Luzhou environmental monitoring center from 2015 to 2018, the tendency of spatial-temporal and ion characteristics in precipitation have been analyzed in order to demonstrate the precipitation pollution status. Traditionally, the environment may become worse as the...

pH Precipitation +2 more

Isolation of Sulfur Oxidizing Bacteria from Polluted Water and Screening for Their Efficiency of Sulfide Oxidase Production

by

Yousef, N. et al. View all

Issue 3

Multidisciplinary research in environmental science

Presence of sulfide in the environment represents huge concerns to biological life. The high costs and low safety of chemical and physical removal strategies lead to finding alternative strategies. Sulfur-oxidizing bacteria (SOB) are consider a promising alternative strategy, where they play a...

sulfur-oxidizing bacteria polluted water +3 more

Review on Treatment of Acid Mine Drainage with Waste Materials: A Novel Approach

by

Alok Sinha et al. View all

Issue 3

Water and wastewater treatment and reuse

The present study systematically and comprehensively reviewed different aspects of treating Acid Mine Drainage (AMD) with active treatment and waste materials. The work also critically reviews the status and the factors associated with the treatment process. Although, conventional active methods are...

Acid Mine Drainage Active Treatment +4 more

Simulation and economic analysis of a hydrometallurgical approach developed for the treatment of waste printed circuit boards (WPCB)

by

Ionela Birloaga et al. View all

Issue 4

Solid Waste Management

This paper presents the main achievements of a hydrometallurgical process to recover base and precious metals from waste printed circuit boards (WPCB). The technology comprises a first leaching process performed in a two-step counter current way with sulfuric acid and hydrogen peroxide for base...

Waste Printed Circuit Board Hydrometallurgical Process +2 more

Effects of soil pH, Total Organic Carbon and texture on fate of Polycyclic Aromatic Hydrocarbons (PAHs) in soils

by

Emoyan, Onoriode Onos et al. View all

Issue 2

Hazardous Substances and Risk Analysis

Polycyclic aromatic hydrocarbons (PAHs) are a group of quotidian organic compounds having between two and six condensed aromatic rings braced in angular, cluster or linear forms possessing hydrogen and carbon atoms only. This work aims to evaluate the physicochemical characteristics of soil as...

Soil TOC pH and Texture +2 more

Effect of flow and module configuration on SO2 absorption by using membrane contactors

by

Zhien Zhang et al. View all

Issue 4

Air pollution and health

Sulfur dioxide (SO2) emissions lead to negative environmental impacts and it is considered as an indicator for the larger group of gaseous sulfur oxides (SOx) in the air. In this paper, the dimethylamine (DMA) solution was used as the absorbent in a α-Al2O3 hollow fiber membrane contactor that is...

SO2 Absorption Hollow fiber membrane +3 more

Modeling the dispersion of NOx and SO2 emissions from a proposed biogas producing facility

by

Prof. Dr. Sabah Ahmed Abdul-Wahab et al. View all

Issue 4

Air pollution and health

This study aims to model the dispersion of two pollutants: nitrogen oxides (NO x) and sulfur dioxide (SO 2) from an onsite biogas fueled generator by using CALPUFF modeling system. CALPUFF is a non-steady state puff simulating software that takes into account, meteorological data, terrain data and...

Biogas CALPUFF +4 more

Chemical kinetics of hydrogen sulfide selective oxidation in aqueous iron chelates solutions

by

Tsapekis O.G., Salmas C.E. and Androutsopoulos G.P.

Issue 3

General

The present work concerns the investigation of the chemical kinetics of H2S selective oxidation into elemental sulfur, by gas absorption and chemical reaction in Fe3+·(ΝΤΑ) aqueous solutions. By using initial reactivity data, priority is given to the study of intrinsic kinetics i.e. to avoid...

hydrogen sulfide selective oxidation +4 more

DOAS measurements above an urban street canyon in a medium sized city

by

Triantafyllou A.G., Zoras S., Evagelopoulos V., Garas S. and Diamantopoulos C.

Issue 2

General

The concentrations of ozone, NO2 and SO2 measured by a Differential Optical Absorption Spectroscopy (DOAS) system in the city of Kozani in Northwestern Greece are presented and compared against data from a conventional ground station. This was made in order to assess DOAS performance in a...

differential optical absorption spectroscopy DOAS +10 more