scholarly journals Removal of heavy metals from wastewater using agricultural byproducts

2020 ◽  
Vol 69 (2) ◽  
pp. 99-112 ◽  
Author(s):  
Hayder A. Alalwan ◽  
Mohammed A. Kadhom ◽  
Alaa H. Alminshid
Keyword(s):  
Heavy Metals ◽  
Adsorption Capacity ◽  
Low Cost ◽  
Agricultural Waste ◽  
Unit Weight ◽  
Regeneration Ability ◽  
Solid Sorbents ◽  
Lead And Cadmium ◽  
Biological Sludge ◽  
Metals Removal

Abstract The use of agricultural waste to remove heavy metals from wastewater has attracted much attention due to its economic advantages and high removal efficiency which is attributed to different functional groups. The sorption mechanism of biomass can consist of several steps including chemisorption, complexation, adsorption on surface, diffusion through pores, and ion exchange. Heavy metals were removed in different rates depending on the adsorbent and metal itself. For instance, coconut waste showed adsorption capacities of 263 and 285 mg/g in removing lead and cadmium ions, respectively. Also, black oak bark has adsorbed mercury in an adsorption capacity of 400 mg/g, while wheat brans adsorption capacity for chromium was 310 mg/g. The adsorption capacity is commonly calculated by Lagergren's first-order equation, the Redlich Peterson model, and the Brunauer–Emmett–Teller (BET) model. However, Langmuir and Freundlich models were intensively used to calculate the adsorbed amount by a unit weight of solid sorbents. This review article aims to present the recently available information on utilizing the biomass materials for heavy metals removal. Here, we highlight the increasing use of these materials due to their low cost, regeneration ability, high adsorption efficiency, and small chemical or biological sludge with a possibility of metal recovery.

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 Physicochemical Studies, Characterization & Adsorption Capacity of Activated Carbon Derived from Dathura Stronsium Fruit Shell

2021 ◽  
pp. 1-4
Author(s):  
Dr. Kavita Gour ◽  
Keyword(s):  
Heavy Metals ◽  
Activated Carbon ◽  
Adsorption Capacity ◽  
Surface Area ◽  
Carbon Materials ◽  
Low Cost ◽  
Volatile Matter ◽  
High Porosity ◽  
Metals Removal ◽  
Removal Of Heavy Metals

In the Present investigation various activated carbon derived from waste material of plant has been synthesized .These carbon materials have high porosity .This high degree of porosity of adsorbents is associated with large surface area, which makes it an excellent adsorbent for removal of Heavy Metals. The activated carbon has advantages over the other with respect of its adsorption capacity, operating Characteristic &Cost. The activated carbon materials have been characterized by surface area, particle size, bulk density, Volatile matter, Moisture content, Ash content, FTIR &SEM studies. The goal of the present investigation was an attempt to develop low cost, highly effective and simple to use activated carbon materials for removal Cr(VI), Cd(II) and Zn(II) from contaminated water based on adsorption phenomenon. This newly developed adsorbent has been proved to be more promising for heavy metals removal without affecting the quality of treated water.

scholarly journals Cellulose-Based Hydrogels for Wastewater Treatment: A Concise Review

Gels ◽  
2021 ◽  
Vol 7 (1) ◽  
pp. 30
Author(s):  
Maimuna Akter ◽  
Maitry Bhattacharjee ◽  
Avik Kumar Dhar ◽  
Fahim Bin Abdur Rahman ◽  
Siddika Haque ◽  
...  
Keyword(s):  
Heavy Metals ◽  
Wastewater Treatment ◽  
Adsorption Capacity ◽  
Low Cost ◽  
Three Dimensional ◽  
Treatment Method ◽  
Future Research ◽  
Natural Polymers ◽  
Adsorption Mechanisms ◽  
Metals Removal

Finding affordable and environment-friendly options to decontaminate wastewater generated with heavy metals and dyes to prevent the depletion of accessible freshwater resources is one of the indispensable challenges of the 21st century. Adsorption is yet to be the most effective and low-cost wastewater treatment method used for the removal of pollutants from wastewater, while naturally derived adsorbent materials have garnered tremendous attention. One promising example of such adsorbents is hydrogels (HGs), which constitute a three-dimensional polymeric network of hydrophilic groups that is highly capable of adsorbing a large quantity of metal ions and dyes from wastewater. Although HGs can also be prepared from synthetic polymers, natural polymers have improved environmental benignity. Recently, cellulose-based hydrogels (CBHs) have been extensively studied owing to their high abundance, biodegradability, non-toxicity, and excellent adsorption capacity. This review emphasizes different CBH adsorbents in the context of dyes and heavy metals removal from wastewater following diverse synthesis techniques and adsorption mechanisms. This study also summarizes various process parameters necessary to optimize adsorption capacity followed by future research directions.

scholarly journals Physicochemical Studies, Characterization & Adsorption Capacity of Activated Carbon Derived from Dathura Stronsium Fruit Shell

2021 ◽  
Vol 1 (1) ◽  
pp. 1-4
Author(s):  
Kavita Gour
Keyword(s):  
Heavy Metals ◽  
Activated Carbon ◽  
Adsorption Capacity ◽  
Surface Area ◽  
Carbon Materials ◽  
Low Cost ◽  
Volatile Matter ◽  
High Porosity ◽  
Metals Removal ◽  
Removal Of Heavy Metals

In the Present investigation various activated carbon derived from waste material of plant has been synthesized .These carbon materials have high porosity .This high degree of porosity of adsorbents is associated with large surface area, which makes it an excellent adsorbent for removal of Heavy Metals. The activated carbon has advantages over the other with respect of its adsorption capacity, operating Characteristic &Cost. The activated carbon materials have been characterized by surface area, particle size, bulk density, Volatile matter, Moisture content, Ash content,FTIR &SEM studies. The goal of the present investigation was an attempt to develop low cost, highly effective and simple to use activated carbon materials for removal Cr(VI), Cd(II) and Zn(II) from contaminated water based on adsorption phenomenon. This newly developed adsorbent has been proved to be more promising for heavy metals removal without affecting the quality of treated water.

scholarly journals Batch Sorption Experiments: Langmuir and Freundlich Isotherm Studies for the Adsorption of Textile Metal Ions onto Teff Straw (Eragrostis tef) Agricultural Waste

2013 ◽  
Vol 2013 ◽  
pp. 1-6 ◽  
Author(s):  
Mulu Berhe Desta
Keyword(s):  
Heavy Metals ◽  
Metal Ions ◽  
Contact Time ◽  
Metal Ion ◽  
Low Cost ◽  
Agricultural Waste ◽  
Equilibrium Concentration ◽  
Eragrostis Tef ◽  
Batch Adsorption ◽  
Textile Effluents

Adsorption of heavy metals (Cr, Cd, Pb, Ni, and Cu) onto Activated Teff Straw (ATS) has been studied using batch-adsorption techniques. This study was carried out to examine the adsorption capacity of the low-cost adsorbent ATS for the removal of heavy metals from textile effluents. The influence of contact time, pH, Temperature, and adsorbent dose on the adsorption process was also studied. Results revealed that adsorption rate initially increased rapidly, and the optimal removal efficiency was reached within about 1 hour. Further increase in contact time did not show significant change in equilibrium concentration; that is, the adsorption phase reached equilibrium. The adsorption isotherms could be fitted well by the Langmuir model. The value in the present investigation was less than one, indicating that the adsorption of the metal ion onto ATS is favorable. After treatment with ATS the levels of heavy metals were observed to decrease by 88% (Ni), 82.9% (Cd), 81.5% (Cu), 74.5% (Cr), and 68.9% (Pb). Results indicate that the freely abundant, locally available, low-cost adsorbent, Teff straw can be treated as economically viable for the removal of metal ions from textile effluents.

Treatment of metals-contaminated wastewaters by use of natural zeolites

1999 ◽  
Vol 39 (10-11) ◽  
pp. 115-122 ◽  
Author(s):  
S. K. Ouki ◽  
M. Kavannagh
Keyword(s):  
Heavy Metals ◽  
Metal Removal ◽  
Low Cost ◽  
Exchange Capacity ◽  
Natural Zeolites ◽  
Al Substitution ◽  
Metals Removal ◽  
Exchange Material ◽  
Na Ions ◽  
Competing Ions

This paper assesses the potential of natural zeolite utilization as a low-cost in exchange material for heavy metals removal. Two natural zeolites, clinoptilolite and chabazite, have been evaluated with respect to their selectivity and removal performance for the treatment of effluents contaminated with mixed heavy metals (Pb, Cd, Cu, Zn, Cr, Ni and Co). The effects of relevant parameters such as chemical treatment, metals concentration, pH, and presence of competing ions were examined. The results showed that the received zeolites contained exchangeable K, Ca and Na ions, but exposing them to concentrated NaCl solutions converted them to a homoionic state in the Na form which improved their exchange capacity. Clinoptilolite and chabazite exhibited different selectivity profiles for all metals studied except for Pb for which both zeolites performed exceptionally well. The results also showed that chabazite exchange capacity is superior to that of clinoptilolite mainly due to the higher Al substitution of Si which provides chabazite with a negative framework favourable to higher exchange capability. The pH was found to have an effect on metal removal as it can influence both the character of the exchanging ions and the zeolite itself. Overall, the removal mechanism was controlled by ion exchange and precipitation was proven negligible.

scholarly journals Using the Low-Cost Waste Materials for Heavy Metals Removal from the Mine Wastewater

2011 ◽  
Vol 52 (10) ◽  
pp. 1849-1852 ◽  
Author(s):  
Radmila Markovic ◽  
Jasmina Stevanovic ◽  
Zoran Stevanovic ◽  
Mile Bugarin ◽  
Dragutin Nedeljkovic ◽  
...  
Keyword(s):  
Heavy Metals ◽  
Low Cost ◽  
Waste Materials ◽  
Heavy Metals Removal ◽  
Metals Removal ◽  
Mine Wastewater

scholarly journals Removal of Heavy Metals from Wastewater by Adsorption

2021 ◽  
Author(s):  
Athar Hussain ◽  
Sangeeta Madan ◽  
Richa Madan
Keyword(s):  
Heavy Metals ◽  
Metal Removal ◽  
Negative Impact ◽  
Low Cost ◽  
Agricultural Waste ◽  
Heavy Metal Removal ◽  
Raw Material ◽  
Removal Of Heavy Metals ◽  
Cost Effective Technique ◽  
Adsorption Processes

Adsorption processes are extensively used in wastewater treatment for heavy metal removal. The most widely used adsorbent is activated carbon giving the best of results but it’s high cost limits its use. It has a high cost of production and regeneration. As the world today faces a shortage of freshwater resources, it is inevitable to look for alternatives that lessen the burden on existing resources. Also, heavy metals are toxic even in trace concentrations, so an environmentally safe method of their removal necessitated the requirement of low cost adsorbents. Adsorption is a cost-effective technique and gained recognition due to its minimum waste disposal advantage. This chapter focuses on the process of adsorption and the types of adsorbent available today. It also encompasses the low-cost adsorbents ranging from agricultural waste to industrial waste explaining the adsorption reaction condition. The cost-effectiveness, technical applicability and easy availability of raw material with low negative impact on the system are the precursors in selecting the adsorbents. The novelty of the chapter lies in covering a wide range of adsorbents with their efficiency in removal of heavy metals from wastewater.

scholarly journals Chemical Analysis of Rock and Water from dug Wells in a Residential Area in Lagos State, Nigeria

2015 ◽  
Vol 7 (2) ◽  
pp. 122
Author(s):  
Mopelola Omotoso ◽  
Ibrahim Amoo
Keyword(s):  
Heavy Metals ◽  
Underground Water ◽  
Polluted Water ◽  
Contaminated Water ◽  
Adsorbent Dosage ◽  
Lead And Cadmium ◽  
Metals Removal ◽  
Lagos State ◽  
Dug Wells ◽  
Cadmium And Lead

Samples of rock deposit dug out from wells at Alimosho local government in Lagos state, Nigeria were characterized for chemical composition and ultimate utilization. Fourier Transform Infrared Spectroscopy (FTIR), X-Ray diffraction (XRD) and Atomic Absorption Spectroscopy (AAS) were used to identify the rock as a mixed clay rock containing 35.04% Illite, 25.64% Illite plus Quartz, 22.20% Kaolinite and 17.09% Feldspar. This was corroborated by cation determination that showed the rock to be predominantly clayey rock. The mean concentrations of lead and copper in water of the wells in the rock location are 0.004mg/L and 0.05mg/L respectively while cadmium is less than detectable limit. The well water in the area studied is therefore not contaminated by these heavy metals. Heavy metals removal by the mixed clay from polluted underground water was studied using AAS. A general increase of sorption was observed with increase in the adsorbent dosage. 20g of the rock adsorbed a higher percentage of copper (80.23%) than lead and cadmium that were 70.25% and 65.83% respectively. The percentage of heavy metals adsorbed confirms the use of mixed clay minerals as a contaminants removal from the underground polluted water. The rock adsorbed copper readily than cadmium and lead. The maximum amount of lead removed from the contaminated underground water of the defunct battery site across the adsorbent dosage (5g, 10g, 15g and 20g) were 1.20mg/L, 3.19mg/L, 3.69mg/L and 4.09mg/L respectively indicating the effect of increase in adsorbent dosage in remediating the lead contaminated water. This data showed that the rock can be used to remove these heavy metals from contaminated water.

Sign in / Sign up

Export Citation Format

Share Document