scholarly journals Facile synthesis of mesoporous carbon nanocomposites from natural biomass for efficient dye adsorption and selective heavy metal removal

RSC Advances ◽  
2016 ◽  
Vol 6 (3) ◽  
pp. 2259-2269 ◽  
Author(s):  
Long Chen ◽  
Tuo Ji ◽  
Liwen Mu ◽  
Yijun Shi ◽  
Logan Brisbin ◽  
...  
Keyword(s):  
Heavy Metal ◽  
Mesoporous Carbon ◽  
Metal Removal ◽  
Heavy Metal Removal ◽  
Dye Adsorption ◽  
Organic Dye ◽  
Polluted Water ◽  
Facile Synthesis ◽  
Carbon Nanocomposites ◽  
Catalytic Graphitization

Mesoporous carbon nanocomposites, processed from natural cottonviacatalytic graphitization, show excellent organic dye adsorption and selective heavy metal removal from polluted water.

Potential of Agricultural Waste Material (Ananas cosmos) as Biosorbent for Heavy Metal Removal in Polluted Water

2020 ◽  
Vol 1010 ◽  
pp. 489-494
Author(s):  
Abdul Hafidz Yusoff ◽  
Rosmawani Mohammad ◽  
Mardawani Mohamad ◽  
Ahmad Ziad Sulaiman ◽  
Nurul Akmar Che Zaudin ◽  
...  
Keyword(s):  
Heavy Metals ◽  
Heavy Metal ◽  
Adsorption Capacity ◽  
Metal Removal ◽  
Low Cost ◽  
Agricultural Waste ◽  
Heavy Metal Removal ◽  
Polluted Water ◽  
Maximum Adsorption Capacity ◽  
Pineapple Peel

Conventional methods to remove heavy metals from polluted water are expensive and not environmentally friendly. Therefore, this study was carried out to investigate the potential of agricultural waste such as pineapple peel (Ananas Cosmos) as low-cost absorbent to remove heavy metals from synthetic polluted water. The results showed that Cd, Cr and Pb were effectively removed by the biosorbent at 12g of pineapple peels in 100 mL solution. The optimum contact time for maximum adsorption was found to be 90 minutes, while the optimum pH for the heavy metal’s adsorption was 9. It was demonstrated that with the increase of adsorbent dosage, the percent of heavy metals removal was also increased due to the increasing adsorption capacity of the adsorbent. In addition, Langmuir model show maximum adsorption capacity of Cd is 1.91 mg/g. As conclusions, our findings show that pineapple peel has potential to remove heavy metal from polluted water.

scholarly journals Aquatic Mosses as Adaptable Bio-Filters for Heavy Metal Removal from Contaminated Water

2020 ◽  
Vol 21 (13) ◽  
pp. 4769
Author(s):  
Paride Papadia ◽  
Fabrizio Barozzi ◽  
Danilo Migoni ◽  
Makarena Rojas ◽  
Francesco P. Fanizzi ◽  
...  
Keyword(s):  
Heavy Metal ◽  
Metal Removal ◽  
Heavy Metal Removal ◽  
Significant Proportion ◽  
Pollutant Removal ◽  
Polluted Water ◽  
Aquatic Moss ◽  
Aquatic Mosses ◽  
High Concentrations ◽  
Short Time

Heavy metals (HMs) are released into the environment by many human activities and persist in water even after remediation. The efficient filtration of solubilized HMs is extremely difficult. Phytoremediation appears a convenient tool to remove HMs from polluted water, but it is limited by the choice of plants able to adapt to filtration of polluted water in terms of space and physiological needs. Biomasses are often preferred. Aquatic moss biomasses, thanks to gametophyte characteristics, can act as live filtering material. The potential for phytoremediation of Hypnales aquatic mosses has been poorly investigated compared to aquatic macrophytes. Their potential is usually indicated as a tool for bioindication and environmental monitoring more than for pollutant removal. When phytoremediation has been considered, insufficient attention has been paid to the adaptability of biomasses to different needs. In this study the heavy metal uptake of moss Taxiphyllum barbieri grown in two different light conditions, was tested with high concentrations of elements such as Pb, Cd, Zn, Cu, As, and Cr. This moss produces dense mats with few culture needs. The experimental design confirmed the capacity of the moss to accumulate HMs accordingly to their physiology and then demonstrated that a significant proportion of HMs was accumulated within a few hours. In addition to the biosorption effect, an evident contribution of the active simplistic mass can be evidenced. These reports of HM accumulation within short time intervals, show how this moss is particularly suitable as an adaptable bio-filter, representing a new opportunity for water eco-sustainable remediation.

scholarly journals A general route to modify diatomite with niobates for versatile applications of heavy metal removal

RSC Advances ◽  
2019 ◽  
Vol 9 (7) ◽  
pp. 3816-3827 ◽  
Author(s):  
Tianning Wang ◽  
Yunfei Yang ◽  
Jinshu Wang ◽  
Junshu Wu ◽  
Lingmin Sun ◽  
...  
Keyword(s):  
Heavy Metal ◽  
Metal Ions ◽  
Heavy Metal Ions ◽  
Metal Removal ◽  
Heavy Metal Removal ◽  
Polluted Water

Nanostructured niobates are crystallized on natural diatomite for cleaning polluted water with heavy metal ions.

scholarly journals Investigation of locust bean husk char adsorbability in heavy metal removal

2017 ◽  
Vol 63 (No. 1) ◽  
pp. 29-35
Author(s):  
Ajayi-Banji Ademola ◽  
Ogunlela Ayo ◽  
Ogunwande Gbolabo
Keyword(s):  
Heavy Metal ◽  
Removal Efficiency ◽  
Retention Time ◽  
Metal Removal ◽  
Heavy Metal Removal ◽  
Freundlich Isotherm ◽  
Polluted Water ◽  
Safe Level ◽  
Column Adsorption ◽  
Locust Bean

he column adsorption study examines irrigation water treatment prior to its application in order to ensure water-crop-consumer heavy metal transfer reduction to the safe level using locust bean husk char (LBHC) as biosorbent. Char structural pattern was investigated with SEM-EDX machine. Contaminated surface water was introduced simultaneously into the bioreactors containing 100 and 200 g of LBHC and collected after 30, 60, 90 120 and 150 min of detention time. Removal efficiency, isotherm and kinetic sorption model were the evaluation tools for the study. Percent of Cr, Cd and As removal at 150 min retention time were 83.33, 100 and 100%, respectively for 100 g biosorbents. A similar trend was observed for Cr and As removal at the same retention time for 200 g of LBHC. Metals sorption conforms to the Freundlich isotherm with correlation coefficient values greater than 0.92. Experimental kinetics had a good fit for pseudo second order (R<sup>2</sup> &gt; 0.94 for most cases). Removal efficiency is a function of contact time, biosorbent dosage and metal concerned. Locust bean husk char has good and effective treatability for some heavy metals in mildly polluted water.

Heavy metal removal from polluted water by Nopal cactus biopolymer-based magnetic nanocomposites

2021 ◽  
Vol 13 (1) ◽  
pp. 42
Author(s):  
Nghia T. Bui ◽  
Loan T.B. Duong ◽  
Thach T.C. Nguyen ◽  
Ngoc T.T. Tran
Keyword(s):  
Heavy Metal ◽  
Metal Removal ◽  
Heavy Metal Removal ◽  
Polluted Water ◽  
Magnetic Nanocomposites
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