Removal of Surfactants in Greywater using Low-Cost Natural Adsorbents: A Review

2021 ◽  
pp. 101532
Author(s):  
Shreya ◽  
Akshaya Kumar Verma ◽  
Aditya Kishore Dash ◽  
Puspendu Bhunia ◽  
Rajesh Roshan Dash
Keyword(s):  
Low Cost ◽  
Natural Adsorbents

Removal of Ni(II) from aqueous solution using Moringa oleifera seeds as a bioadsorbent

2012 ◽  
Vol 65 (8) ◽  
pp. 1435-1440 ◽  
Author(s):  
Thiago L. Marques ◽  
Vanessa N. Alves ◽  
Luciana M. Coelho ◽  
Nívia M. M. Coelho
Keyword(s):  
Moringa Oleifera ◽  
Low Cost ◽  
Ease Of Use ◽  
Toxic Waste ◽  
Adsorption Model ◽  
New Techniques ◽  
Sorption Data ◽  
Natural Adsorbents ◽  
Ph Range

Metal contaminants are generally removed from effluents by chemical and physical processes which are often associated with disadvantages such as the use of toxic reagents, generation of toxic waste and high costs. Hence, new techniques have been developed, among them the study of natural adsorbents, for instance, the use of Moringa oleifera seeds. The potential of M. oleifera seeds for nickel removal in aqueous systems was investigated. The seeds utilized were obtained from plants grown in Uberlândia/Brazil. After being dried and pulverized, the seeds were treated with 0.1 mol/L NaOH. Fourier transform infrared spectroscopy, scanning electron microscopy and thermogravimetric analyses were used for the characterization of the material. Using the optimized methodology (50 mL of 4.0 mg/L Ni(II), pH range of 4.0–6.0, agitation time of 5 min and adsorption mass of 2.0 g) more than 90% of Ni(II) could be removed from water samples. The sorption data were fitted satisfactorily by the Langmuir adsorption model. Evaluation applying the Langmuir equation gave the monolayer sorption capacity as 29.6 mg/g. The results indicate that this material could be employed in the extraction of nickel, considering its ease of use, low cost and environmental viability, which make it highly attractive for application in developing countries.

Adsorbents for Removal of Hazardous Metals from waste water and natural water samples: A Review

2021 ◽  
pp. 471-478
Author(s):  
Kanhaya Lal ◽  
Garima Prajapat ◽  
Uma Rathore ◽  
Bhojak N.
Keyword(s):  
Metal Removal ◽  
Low Cost ◽  
Agricultural Waste ◽  
Environmental Contaminants ◽  
Heavy Metal Removal ◽  
Potential Solution ◽  
Industrial Wastewaters ◽  
Natural Adsorbents ◽  
Hazardous Metal ◽  
Waste Food

Wide ranges of low cost adsorbents were used to remove hazardous metal in aqueous solution and wastewater. The low cost adsorbents were usually collected from agricultural waste, seafood waste, food waste, industrial by-product and soil. These adsorbents are readily available in a copious amount. Some of the natural adsorbents appeared as good heavy metal removal, while some were not and require further modifications and improvements to enhance the adsorption capacity. Currently, heavy metals exist in most of the industrial wastewaters and water supplies are among the most severe environmental contaminants. Numerous research works have been conducted in this field, this review includes few potential solution containing papers.

scholarly journals Effectiveness of termite hill as an economic adsorbent for the adsorption of alizarin red dye

2018 ◽  
Vol 9 (1) ◽  
pp. 83-93 ◽  
Author(s):  
Olushola S. Ayanda ◽  
Olusola S. Amodu ◽  
Habibat Adubiaro ◽  
Godwin O. Olutona ◽  
Oluwapese T. Ebenezer ◽  
...  
Keyword(s):  
Low Cost ◽  
Adsorption Model ◽  
Order Model ◽  
Alizarin Red ◽  
Langmuir Adsorption ◽  
Equilibrium Study ◽  
Natural Adsorbents ◽  
Pseudo Second Order ◽  
Red Dye ◽  
Modern Analytical

Abstract The adsorption of alizarin red (AR) dye onto termite hill sample (THs) was investigated. Prior to the adsorption studies, the elemental, morphological, surface and structural properties of THs were examined by modern analytical methods. Instrumental analysis showed that the homogenous micro-structured THs are comprised of iron oxide, silica oxide, and alumina as major components. Experiments showed that the adsorption capacity of AR decreases with increasing pH and initial AR concentrations, and increases with increasing contact time, stirring speed and temperature. The equilibrium study obeyed the Langmuir adsorption model and the kinetics followed the pseudo-second-order model. About 95.0% AR reduction (1.425 mg/g) was achieved when 0.8 g of THs was mixed with 30 mL of 40 mg/L AR solution for 120 min at 400 rpm and a pH of 2. Thermodynamic study suggested that AR adsorption onto THs is spontaneous at higher temperatures of 323 K and above (ΔGo values are negative). However, ΔGo are positive at lower temperatures of 293–313 K, which implies that the adsorption process is not spontaneous at these temperatures. This study showed that THs could be used as alternative, low-cost, natural adsorbents for the removal of dyes from wastewater.

scholarly journals Enhancing the Adsorption of Lead (II) by Bentonite Enriched with pH-Adjusted Meranti Sawdust

Water ◽  
2018 ◽  
Vol 10 (12) ◽  
pp. 1875 ◽  
Author(s):  
P. Mohajeri ◽  
C. Smith ◽  
M. Selamat ◽  
H. Abdul Aziz
Keyword(s):  
Chemical Oxygen Demand ◽  
Groundwater Contamination ◽  
Environmental Protection ◽  
Adsorption Capacity ◽  
Low Cost ◽  
Oxygen Demand ◽  
Buffering Capacity ◽  
Adsorption Efficiency ◽  
Ph Changes ◽  
Natural Adsorbents

In recent years, the need for a safe and modern composite barrier for the prevention of groundwater contamination and the provision of geo-environmental protection has been studied together with the need of designing a low-cost and effective liner for isolating landfill contents from the environment. In this study, various mix designs involving two natural adsorbents, Na-bentonite the pH-adjusted sawdust, were prepared for a series of geo-environmental experiments to be carried out to determine the adsorption capacity, buffering capacity, pH changes, and Chemical Oxygen Demand (COD) changes among others, in the presence of Pb(NO3)2 contaminant concentrations. Generally, the results showed an increase in adsorption capacity in the acidic segment of the treatment. An increase of 58% of the adsorption efficiency of the Na-bentonite in adsorbing the contaminant at the highest concentration was the most important achievement of the system while in the acidic segment.

scholarly journals Sorption of bisphenol A from aqueous solutions using natural adsorbents: isotherm, kinetic and effect of temperature

2021 ◽  
Vol 314 ◽  
pp. 07003
Author(s):  
Nouhaila Hadoudi ◽  
Hassan Amhamdi ◽  
M’hamed Ahari
Keyword(s):  
Bisphenol A ◽  
Negative Impact ◽  
Low Cost ◽  
Environmental Pollutant ◽  
Effect Of Temperature ◽  
Solution Ph ◽  
Natural Adsorbents ◽  
Cost Treatment ◽  
And Performance ◽  
Isothermal Kinetic

Emerging organic micropollutants, such as bisphenol A (BPA), have raised concerns about their negative impact on human health and ecological safety. This review article aims to demonstrate and highlight recent advances in adsorption applications for bisphenol A, a toxic environmental pollutant commonly found in wastewater. There are many reasons to use non-toxic materials and eco-friendly technologies to remove this pollutant from sewage. [1] Several adsorbents previously used have shown significant efficiency and performance for the removal of BPAs, and current research is directed towards the development of low-cost treatment processes using materials such as clays and Chitosan. The properties of the adsorbent can be adjusted by changing their surface for an optimized performance. In addition, the efficiency of the adsorption process depends on various parameters such as solution pH, the pollutant concentration, contact time, temperature, nature and dose of the adsorbent, which are also discussed. In addition, we critically review the isothermal, kinetic and thermodynamic approaches. [2]

Recent Strategies on Adsorptive Removal of Precious Metals and Rare Earths Using Low-Cost Natural Adsorbents

2020 ◽  
pp. 87-109
Author(s):  
Janardhan Reddy Koduru ◽  
Lakshmi Prasanna Lingamdinne ◽  
Suresh Kumar Kailasa ◽  
Thriveni Thenepalli ◽  
Yoon-Young Chang ◽  
...  
Keyword(s):  
Rare Earths ◽  
Low Cost ◽  
Precious Metals ◽  
Adsorptive Removal ◽  
Natural Adsorbents

scholarly journals Natural Nanoporous Filter Material as a New High-Efficiency Natural Adsorbent to Remove Textile Dyes

2020 ◽  
Vol 15 ◽  
pp. 16-23
Author(s):  
Chin-Ya Kuo ◽  
Hsiao-Han Liu
Keyword(s):  
Uniform Distribution ◽  
High Efficiency ◽  
Low Cost ◽  
Mathematic Model ◽  
Filter Material ◽  
Textile Dyes ◽  
Physical Processes ◽  
Natural Adsorbents ◽  
Different Temperatures ◽  
Time Courses

The objective of this paper is to perform the innovation design of removing most textile dyes that are harmful to the environment and might induce cancer. However, many methodologies had been developed for various chemical and physical processes to remove different dyes, such as ozone oxidation, electrochemical methods, chemical coagulation, hypochlorite oxidation, and adsorption to remove dyes from wastewater. A novel nanoporous filter methodology and mathematic simulations for adsorption were established as an effective medium for removing dyes from wastewater which was compared to other expensive treatments. The different concentrations of the dye liquid are used as a tester, and the different concentrations of nanoporous adsorbent were added in a uniform distribution and were tested with different time courses and under different temperatures. The final readings were measured by a spectrophotometer and fit into a mathematic model. The result indicates that this nanoporous and natural adsorbents are very good at cleaning the dyes in this system. The fit-in mathematic models could be applied in these tests which can be used in the industrial conditions for a low cost without secondary dye pollutions.

Lignin and Lignin Based Materials for the Removal of Heavy Metals from Waste Water-An Overview

2019 ◽  
Vol 233 (3) ◽  
pp. 315-345 ◽  
Author(s):  
Ayesha Naseer ◽  
Anum Jamshaid ◽  
Almas Hamid ◽  
Nawshad Muhammad ◽  
Moinuddin Ghauri ◽  
...  
Keyword(s):  
Heavy Metals ◽  
Environmental And Health Effects ◽  
Low Cost ◽  
Black Liquor ◽  
Steel Production ◽  
Toxic Heavy Metals ◽  
Natural Adsorbents ◽  
Wood Residues ◽  
Removal Of Heavy Metals ◽  
By Products

Abstract Water Pollution through heavy metals is the concerned issue as many industries like tanning, steel production and electroplating are the major contributors. Various toxic Heavy metals are a matter of concern as they have severe environmental and health effects. Most commonly, conventional methods are using to remove these heavy metals like precipitation, ion exchange, which are not economical and have disposal issues. Adsorption of heavy metals by different low-cost adsorbents seems to be the best option in wastewater treatment. Many agricultural by-products proved to be suitable as low-cost adsorbents for removing heavy metals efficiently in a minimum time. Lignin residues that involves both agricultural and wood residues and sometimes separated out from black liquor through precipitation have adsorption capacity and affinity comparable to other natural adsorbents. However, lignin as bio adsorbents have the advantage of less cost and gives efficient adsorption results. This study is a review of the recent literature on the use of natural lignin residues for heavy metals adsorption under different experimental scenarios.

scholarly journals Enhancing the Adsorption of Lead (II) by Bentonite Enriched with pH-adjusted Meranti Sawdust

2018 ◽  
Author(s):  
Parsa Mohajeri ◽  
Mohammad Razip Selamat ◽  
Hamidi Abdul Aziz ◽  
Carol Smith
Keyword(s):  
Groundwater Contamination ◽  
Environmental Protection ◽  
Adsorption Capacity ◽  
Low Cost ◽  
Buffering Capacity ◽  
Adsorption Efficiency ◽  
Ph Changes ◽  
Natural Adsorbents

In recent years, the need for safe and modern composite barrier for the prevention of groundwater contamination and the provision of Geo-environmental protection has been studied together with the need of designing low cost and effective liner for isolating landfill contents from the environment. In this study, various mix designs involving two natural adsorbents, the Na-Bentonite and the pH-adjusted sawdust were prepared for a series of Geo-environmental experiments to be carried out to determine the adsorption capacity, buffering capacity, pH changes, and COD changes among others, in the presence of Pb(NO3)2 contaminant concentrations. Generally, the results showed an increase in adsorption capacity in the acidic segment of the treatment. An increase of 58% of the adsorption efficiency of the Na-Bentonite in adsorbing the contaminant at the highest concentration was the most important achievement of the system while in the acidic segment.

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