scholarly journals Low Cost and Eco-Friendly Removal of Toxic Heavy Metal from Industrial Wastewater

2021 ◽  
Vol 0 (0) ◽  
pp. 0-0
Author(s):  
Hala Elbltagy ◽  
Heba Elbasiouny ◽  
Abdulsalam Almuhamady ◽  
Hala Gamal El-Dein
Keyword(s):  
Heavy Metal ◽  
Industrial Wastewater ◽  
Low Cost ◽  
Toxic Heavy Metal

Highly sensitive detection of Cr(vi) in groundwater by bimetallic NiFe nanoparticles

2017 ◽  
Vol 9 (6) ◽  
pp. 1031-1037 ◽  
Author(s):  
Jingtao Liu ◽  
Yu Ding ◽  
Lifei Ji ◽  
Xin Zhang ◽  
Fengchun Yang ◽  
...  
Keyword(s):  
Heavy Metal ◽  
Hexavalent Chromium ◽  
Low Cost ◽  
High Sensitivity ◽  
Sensitive Detection ◽  
Toxic Heavy Metal ◽  
Metal Pollutants ◽  
Highly Sensitive ◽  
Highly Sensitive Detection ◽  
Heavy Metal Pollutants

Hexavalent chromium (Cr(vi)) is one of the most toxic heavy metal pollutants in groundwater, and thus the detection of Cr(vi) with high sensitivity, accuracy, and simplicity and low cost is of great importance.

scholarly journals Heavy Metal Ion Detection Platforms Based on a Glutathione Probe: A Mini Review

2019 ◽  
Vol 9 (3) ◽  
pp. 489 ◽  
Author(s):  
Jian Zhang ◽  
Xuan Sun ◽  
Jayne Wu
Keyword(s):  
Heavy Metal ◽  
Metal Ion ◽  
Water Solubility ◽  
Limit Of Detection ◽  
Research Effort ◽  
Low Cost ◽  
Simultaneous Detection ◽  
Molecular Probe ◽  
Heavy Metal Ion ◽  
Toxic Heavy Metal

Globally, heavy metal ion (HMI) contamination is on the rise, posing an ever-increasing risk to ecological and human health. In recent years, great research effort has been devoted to the sensitive detection and quantitative analysis of HMIs. Low cost, sensitive, selective, and rapid methods for HMI detection are of growing demand, and HMI biosensors have great potential in meeting this need due to their timeliness, cost-effectiveness and convenience in operation. Glutathione is known for its strong ability to bind with toxic heavy metal ions, in addition to its water solubility, stable activity and ready availability. As a result, glutathione is becoming a molecular probe of choice in the preparation of sensors for sensitive, affordable, and accessible HMI detection. This review summarizes the results from various glutathione-based HMI detection strategies reported in recent years, which are categorized according to their signal transduction methods. Their operation and implementation, along with figures of merit such as limit of detection, selectivity, and response time, are discussed and compared. Based on the review, both individual HMI detection and simultaneous detection of multiple HMIs can be realized under specific reaction conditions, showing the great potential of glutathione-based detection to realize various types of practical HMI detection.

Adsorption of heavy metal from industrial wastewater onto low-cost Malaysian kaolin clay–based adsorbent

2020 ◽  
Vol 27 (12) ◽  
pp. 13949-13962 ◽  
Author(s):  
Jia-Boon Chai ◽  
Pek-Ing Au ◽  
Nabisab Mujawar Mubarak ◽  
Mohammad Khalid ◽  
Wendy Pei-Qin Ng ◽  
...  
Keyword(s):  
Heavy Metal ◽  
Industrial Wastewater ◽  
Low Cost ◽  
Kaolin Clay

Flax processing waste – A low-cost, potential biosorbent for treatment of heavy metal, dye and organic matter contaminated industrial wastewater

2021 ◽  
Vol 174 ◽  
pp. 114195
Author(s):  
Prithwiraj Dey ◽  
B.S. Mahapatra ◽  
V.K. Juyal ◽  
Biswajit Pramanick ◽  
M.S. Negi ◽  
...  
Keyword(s):  
Heavy Metal ◽  
Organic Matter ◽  
Industrial Wastewater ◽  
Low Cost ◽  
Processing Waste

scholarly journals A Selective Bioreduction of Toxic Heavy Metal Ions from Aquatic Environment bySaccharomyces cerevisiae

2008 ◽  
Vol 5 (4) ◽  
pp. 918-923 ◽  
Author(s):  
A. M. Rahatgaonkar ◽  
N. R. Mahore
Keyword(s):  
Aqueous Solution ◽  
Heavy Metal ◽  
Metal Ions ◽  
Metal Toxicity ◽  
Industrial Wastewater ◽  
Heavy Metal Ions ◽  
Solution Concentration ◽  
Reaction Conditions ◽  
Toxic Heavy Metal ◽  
Maximum Reduction

The need to remove or recover metal ions from industrial wastewater has been established in financial as well as environmental terms. This need has been proved financially in terms of cost saving through metal reuse or sale and environmentally as heavy metal toxicity can affect organisms throughout the food chain, including humans. Bioremediation of heavy metal pollution remains a major challenge in environmental biotechnology. Current removal strategies are mainly based on bioreduction of Co++, Ni++, Cu++and Cd++to their metallic forms bySaccharomyces cerevisiaein buffered aqueous solution. The rate of biotransformation was significantly influenced by pH of aqueous solution, concentration of biomass and hardness of water. All reaction conditions were optimized and maximum reduction of Co++, Cd++, Ni++and Cu++were observed as 80%, 63%, 50%, and 44% respectively. Unreacted Co++, Cd++, Ni++metal ions were extracted by 8-hydroxyquinoline and Cu++by diethylthio carbamate in CHCl3at different pH. Furthermore, the concentrations of unreacted metal ions were established spectrophotometrically.

scholarly journals A Combined Spectroscopic and Theoretical Analysis of Plasmonic Silver Nanoparticles Sensor Towards Detailed Microscopic Understanding of Heavy Metal Detection

2021 ◽  
Author(s):  
Nivedita Pan ◽  
Tuhin Kumar Maji ◽  
Sayantika Banarjee ◽  
Pritam Biswas ◽  
Arka Chatterjee ◽  
...  
Keyword(s):  
Heavy Metal ◽  
Silver Nanoparticles ◽  
Environmental Protection Agency ◽  
Low Cost ◽  
Linear Chain ◽  
Pollution Monitoring ◽  
Localized Surface Plasmon ◽  
Lead Ion ◽  
Toxic Heavy Metal ◽  
Static Approximation

Abstract Plasmonic nanoparticles are of great importance owing to their highly responsive ‘Localized Surface Plasmon Resonance’ (LSPR) behaviour to self-agglomeration/ aggregation leading to the development of various nanosensors. Herein we demonstrated the definite self-assembly of citrate functionalized silver nanoparticles (AgNPs) into a one-dimensional linear chain in presence of charged lead ions (Pb 2+ ), one of the most toxic heavy metal pollutants. We have explored detail mechanism using a variety of spectroscopic tools and electron microscopy. The self-aggregation of AgNPs leads to the generation of new LSPR modes due to coupling of nearby existing modes. The conclusion of our experimental findings is duly supported by our developed numerical modelling based on the quasi-static approximation that the generated new LSPR modes are solely due to formation of chain-like aggregation of AgNPs. We have also monitored the LSPR spectra in presence of other metal ions, however, only Pb 2+ found to give such unique self-assembled geometry may due to its high interaction affinity with citrate. These findings play a key role for citrate functionalised AgNPs to be used as a low cost highly selective and sensitive lead ion sensor for potential application in industrial lead pollution monitoring. We have further varied several sensor parameters such as AgNPs size, concentration and the allowed reaction time for it to be practically implemented as an efficient lead sensor meeting the Environmental Protection Agency recommendations.

ASSESSMENT OF HEAVY METAL CONCENTRATION IN COCONUT WATER

1970 ◽  
pp. 07-10
Author(s):  
MdDidarul Islam, Ashiqur Rahaman, Aboni Afrose
Keyword(s):  
Heavy Metals ◽  
Heavy Metal ◽  
Heavy Metal Concentration ◽  
Coconut Water ◽  
Toxic Heavy Metals ◽  
High Concentration ◽  
Toxic Heavy Metal ◽  
Low Concentration ◽  
Wet Ashing ◽  
Aas Method

This study was based on determining concentration of essential and toxic heavy metal in coconut water available at a local Hazaribagh area in Dhaka, Bangladesh. All essential minerals, if present in the drinking water at high concentration or very low concentration, it has negative actions. In this study, fifteen samples and eight heavy metals were analyzed by Atomic Absorption Spectroscopy (AAS) method which was followed by wet ashing digestion method. The concentration obtained in mg/l were in the range of 0.3 to 1.5, 7.77 to 21.2, 0 to 0.71, 0 to 0.9, 0 to 0.2, 0.9 to 17.3, 0.1 to 0.9, 0 to 0.9 and 0 to 0.7 for Fe, Ni, Cu, Cd, Cr, Zn, Pb and Se respectively. From this data it was concluded that any toxic heavy metals like Cd, Cr, Pb and Ni exceed their toxicity level and some essential nutrients were in low concentration in those samples. 

scholarly journals Application of nanoscale zero-valent iron in hexavalent chromium-contaminated soil: A review

2020 ◽  
Vol 9 (1) ◽  
pp. 736-750
Author(s):  
Xilu Chen ◽  
Xiaomin Li ◽  
Dandan Xu ◽  
Weichun Yang ◽  
Shaoyuan Bai
Keyword(s):  
Heavy Metal ◽  
Hexavalent Chromium ◽  
Contaminated Soil ◽  
Zero Valent Iron ◽  
Toxic Heavy Metal ◽  
Factors Affecting ◽  
Metal Pollutants ◽  
Nanoscale Zero Valent Iron ◽  
Low Toxicity ◽  
Heavy Metal Pollutants

AbstractChromium (Cr) is a common toxic heavy metal that is widely used in all kinds of industries, causing a series of environmental problems. Nanoscale zero- valent iron (nZVI) is considered to be an ideal remediation material for contaminated soil, especially for heavy metal pollutants. As a material of low toxicity and good activity, nZVI has been widely applied in the in situ remediation of soil hexavalent chromium (Cr(vi)) with mobility and toxicity in recent years. In this paper, some current technologies for the preparation of nZVI are summarized and the remediation mechanism of Cr(vi)-contaminated soil is proposed. Five classified modified nZVI materials are introduced and their remediation processes in Cr(vi)-contaminated soil are summarized. Key factors affecting the remediation of Cr(vi)-contaminated soil by nZVI are studied. Interaction mechanisms between nZVI-based materials and Cr(vi) are explored. This study provides a comprehensive review of the nZVI materials for the remediation of Cr(vi)-contaminated soil, which is conducive to reducing soil pollution.

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