scholarly journals Investigation of Heavy Metal (Lead) Removal from Aqueous Solution by Using Advanced Oxidation Process (Fenton)

2019 ◽  
pp. 1-7
Author(s):  
Fahimeh Moghadam ◽  
Asma Ghasemi Pourafshar
Keyword(s):  
Heavy Metals ◽  
Aqueous Solution ◽  
Contact Time ◽  
Advanced Oxidation Process ◽  
Aqueous Media ◽  
Elimination Rate ◽  
Lead Removal ◽  
Chronic Complications ◽  
Food And Beverage ◽  
Lead Metal

Background and Aim: Undoubtedly, controlling the maximum entry of heavy metals into the food is one of the measures which should be taken into account in order to maintain the food consumers' health and achieve the food safety. The sensitivity and importance of this issue are doubled due to the irreparable, acute and chronic complications of heavy metals which are classified according to the effects on the nervous system until the carcinogenesis in the human body. On the other hand, this issue is significantly important since these metals differently enter to crops such as tea, water, and rice and generally the food and beverage that are widely consumed. Therefore, the aim of this study is to remove heavy lead metal from aqueous solution by Fenton method. This study is an experimental study. The samples are synthesized in a collection of laboratories at the Faculty of Health, and the pH parameters, contact time and lead elimination rate and the optimal Fenton ratio are investigated. Results are analyzed using SPSS software and Charts are plotted by excel. The results showed that the best pH for removal of lead 5 and its best concentration is 30 mg/ L, and the optimal Fenton ratio is 1 to 5, as well as the best contact time for removal of lead from aqueous media for 10 minutes. The present study showed that the pH factor, contact time, Fenton concentration and lead in all four were effective in removing lead from aquatic solution.

Utilisation of Biomass and Hybrid Biochar from Elephant Grass and Low Density Polyethylene for the Competitive Adsorption of Pb(II), Cu(II), Fe(II) and Zn(II) from Aqueous Media

2020 ◽  
Vol 13 ◽  
Author(s):  
Joshua O. Ighalo ◽  
Lois T. Arowoyele ◽  
Samuel Ogunniyi ◽  
Comfort A. Adeyanju ◽  
Folasade M. Oladipo-Emmanuel ◽  
...  
Keyword(s):  
Heavy Metals ◽  
Removal Efficiency ◽  
Contact Time ◽  
Competitive Adsorption ◽  
Adsorption Process ◽  
Aqueous Media ◽  
Polluted Water ◽  
Batch Adsorption ◽  
Order Kinetic ◽  
Elephant Grass

Background: The presence of pollutants in polluted water is not singularized hence pollutant species are constantly in competition for active sites during the adsorption process. A key advantage of competitive adsorption studies is that it informs on the adsorbent performance in real water treatment applications. Objective: This study aims to investigate the competitive adsorption of Pb(II), Cu(II), Fe(II) and Zn(II) using elephant grass (Pennisetum purpureum) biochar and hybrid biochar from LDPE. Method: The produced biochar was characterised by Scanning Electron Microscopy (SEM) and Fourier Transform Infrared Spectroscopy (FTIR). The effect of adsorption parameters, equilibrium isotherm modelling and parametric studies were conducted based on data from the batch adsorption experiments. Results: For both adsorbents, the removal efficiency was >99% over the domain of the entire investigation for dosage and contact time suggesting that they are very efficient for removing multiple heavy metals from aqueous media. It was observed that removal efficiency was optimal at 2 g/l dosage and contact time of 20 minutes for both adsorbent types. The Elovich isotherm and the pseudo-second order kinetic models were best-fit for the competitive adsorption process. Conclusion: The study was able to successfully reveal that biomass biochar from elephant grass and hybrid biochar from LDPE can be used as effective adsorbent material for the removal of heavy metals from aqueous media. This study bears a positive implication for environmental protection and solid waste management.

Sorption of Copper and Zinc from Aqueous Solutions by Microwave Incinerated Sugarcane Bagasse Ash (MISCBA)

2016 ◽  
Vol 835 ◽  
pp. 378-385 ◽  
Author(s):  
Ibrahim Umar Salihi ◽  
Shamsul Rahman Mohamed Kutty ◽  
Mohamed Hasnain Isa ◽  
Usman Aminu Umar ◽  
Emmanuel Olisa
Keyword(s):  
Heavy Metals ◽  
Aqueous Solution ◽  
Correlation Coefficient ◽  
Sugarcane Bagasse ◽  
Contact Time ◽  
Industrial Wastewater ◽  
Low Cost ◽  
Isotherm Model ◽  
Copper And Zinc ◽  
Sugarcane Bagasse Ash

Industrial wastewater containing toxic pollutants such as heavy metals tends to contaminate the environment once it is release without proper treatment. Heavy metals are toxic to both human and other living organisms. It is necessary to treat industrial wastewater polluted with heavy metals prior to its discharge into the receiving environment. In this study, low cost adsorbent was generated from sugarcane bagasse through incineration. The prepared adsorbent “microwave incinerated sugarcane bagasse ash” (MISCBA) was used in removing copper and zinc from aqueous solution. Parameters of importance such as pH, contact time and adsorbent dosages are studied to investigate their effects on the adsorption of copper and zinc. Maximum adsorption was observed at pH 6.0, contact time of 180 minutes and adsorbent dosage of 10 g/L. Zinc removal follows Langmuir isotherm model with correlation coefficient of 0.9291. Copper adsorption follows both Langmuir and Freundlich isotherm model with correlation coefficient of 0.9181 and 0.9742, respectively. Removal capacities of 38.4 mg/g and 20.4 mg/g were obtained for copper and zinc, respectively. Application of MISCBA as low - cost adsorbent have shown significant outcome in removal of copper and zinc from aqueous solution.

scholarly journals CRUSTACEAN WASTE SHELLS AS ADSORPTION MATERIALS FOR HEAVY METALS IN AN AQUEOUS SOLUTION

2020 ◽  
Vol 4 (2) ◽  
pp. 33-25
Author(s):  
Queency P. Padida ◽  
Rolando V. Maningas ◽  
Christian Paul P. dela Cruz ◽  
Lustina P. Lapie ◽  
Nilda S. Alforja
Keyword(s):  
Heavy Metals ◽  
Aqueous Solution ◽  
Contact Time ◽  
Metal Removal ◽  
Heavy Metal Removal ◽  
High Capacity ◽  
Adsorption Rate ◽  
Agriculture Industry ◽  
Laguna De Bay ◽  
High Concentrations

Laguna de Bay is one of the country’s major lakes, providing a third of the fish consumed by Metro Manila’s 16 million residents. It also provides support for agriculture, industry, and hydropower generation, as well as providing a welcome respite for many Filipinos. However, because of the lake’s importance, it is threatened by a variety of issues, including pollution. Heavy metals such as mercury and lead are present in high concentrations in the lake. And these heavy metals may persist in fish, water, air and the human body. As a result, an adsorption technique for heavy metal removal in an aqueous solution was investigated. As an adsorbent, the produced chitosan from crustacean waste shells was employed. The study’s parameters were contact time, adsorbent quantity, and pH. Results showed that 0.5 g of chitosan has a higher absorption rate of 99% in 500 mg/L solutions compared to 1.0 g of chitosan with an adsorption rate of 98%. In terms of contact time, 60 minutes showed almost 100% adsorption rate while 120 minutes was 98%. With increasing pH, the amount of metal adsorption rises. This developed chitosan from crustacean waste shells indicates high capacity as adsorbent materials for heavy metals. As a result, it appears to be a viable material for water treatment.

The Elimination of Mineral Micropollutants

1982 ◽  
Vol 14 (12) ◽  
pp. 87-105 ◽  
Author(s):  
B Regnier ◽  
C Goblet ◽  
J Genot ◽  
W J Masschelein
Keyword(s):  
Heavy Metals ◽  
Contact Time ◽  
Ph Value ◽  
Elimination Rate ◽  
Cation Exchange Resin ◽  
Specific Effect ◽  
Waste Waters ◽  
Variable Elimination ◽  
Heavy Metal Salts ◽  
Treatment Facilities

Mineral micropollutants in waste waters and drinking water are essentially composed of heavy metal salts. Their elimination, when present in trace quantities, is discussed in this paper. The techniques, which water treatment facilities can use, necessitate preclarification in open basins (efficiency varying between 20 and 90%), elimination by filtration, with efficiencies depending largely on preoxidation but particularly on coagulation-precipitation and related techniques. Our investigations, as well as certain literature data, demonstrate the predominating importance of contact between water and sludges in decanters-clarificators. Thus, Jar tests often yield only a poorly representative result of the elimination of heavy metals by coagulation-flocculation-decantation. As to the use of aluminium sulphate, for example, the elimination rates mentioned relating to the elimination rate or % removal in laboratory experiments, in pilot tests with sludge beds and in treatment plants respectively are as follows: Fe: 100, 95, 100; Mn: 4, 38, 97; Cu: 91, 83, 85; Cr: 29, 8, 83; Cd: 21, 29, 96; Ni: 0, 20, 50; Co: 0, 16, 51; Pb; -, 52, 61. It should be noted that treatment in plants is much more elaborate (oxidation by chlorine dioxide, application of activated silica and a one hour contact time with the sludge bed) than in pilot experiments (15 minutes contact time and a sludge bed without activated carbon). The oxidation state of metals plays an important role in techniques for their elimination by the usual methods such as coagulation-flocculation-decantation as well as in coprecipitation phenomena of Fe and Mn for example. The method of alkaline precipitation, in which the pH value needed is obtained by addition of lime, results in elimination rates over 80% and generally far over 90%. This method uses at the same time direct precipitation and coprecipitation in a calcium carbonate/magnesium oxide matrix. Ion exchange gives highly variable elimination results according to the ion present and its concentration. In practice, strong cation exchange resin are generally applied. In treatment plants, adsorption on carbon allows an overall yield of 50-100% removal of the metal concerned, provided that preoxidation and sufficient contact times are allowed. The experimental distinction of the specific effect due to adsorption is difficult, but according to our studies, adsorption occurs to a small extent only in the majority of cases. 30-50% of the remaining traces are eliminated by infiltration of purified waters underground, where a levelling of concentrations also occurs. In addition to the investigations presented, studies still being carried out demonstrate a sufficient stabilization of heavy metals immobilized with lime in order to allow them to be dumped in the environment without risk. This method seems confirmed as a method of choice in treatment of waste waters loaded with heavy metals.

Watermelon Rind: A Potential Adsorbent for Zinc Removal

2014 ◽  
Vol 680 ◽  
pp. 146-149 ◽  
Author(s):  
Norzila Othman ◽  
Y.S. Kueh ◽  
F.H. Azizul-Rahman ◽  
R. Hamdan
Keyword(s):  
Heavy Metals ◽  
Aqueous Solution ◽  
Contact Time ◽  
Industrial Revolution ◽  
Zinc Concentration ◽  
Water Bodies ◽  
Zinc Removal ◽  
Watermelon Rind ◽  
Optimum Ph

The industrial revolution has significantly increase the discharge of wastewater into water bodies with heavy metals. In this study, watermelon rind was used as a biosorbent. Wastewater from mosaic industry was characterized by using flame AAS and zinc was found to have concentration range of 350mg/L to 450mg/L. Watermelon rind was characterized by using XRF and SEM. The results from XRF before biosorption shows the presence of Si to enhance biosorption. Zinc present after biosorption. The optimum pH, biosorbent amount, zinc concentration and contact time were found to be pH8, 1.5g, 400mg/L, and 30minutes respectively. The watermelon rind was proven as an effective biosorbent for zinc removal from aqueous solution

scholarly journals Calcareous and Gypsum Soils Lead Removal Using Two-Steps Washing

2021 ◽  
Vol 910 (1) ◽  
pp. 012136
Author(s):  
Hazim Aziz Al-Robai ◽  
Ameer Hazim Azeez Al-Rubay ◽  
Ghaith Salah Al-Mamoori ◽  
Ali Akram Abdulateef
Keyword(s):  
Heavy Metals ◽  
Contact Time ◽  
Soil Washing ◽  
Soil Samples ◽  
Engine Oil ◽  
Lead Removal ◽  
Used Engine Oil ◽  
Solid Ratio

Abstract The soil washing technique is considered one of the quick and effective techniques for treating soil contaminated with heavy metals. In this study, EDTA-Na2 and Oxalic were used as washing solutions to removing Pb from calcareous and gypsum soils contaminated with Pb only and with Pb in addition to the used engine oil. The soil samples were contaminated with different concentrations of Pb only using Pb(NO3)2 to soils sample for each concentration separately then the sample was divided into two equal parts. The first part represents the calcareous and gypsum soil samples contaminated with Pb. The second part was taken after air-dried, and then the used engine oil was added and homogenized well. Five parameters (pH, contact time, Pb concentrations, temperature, and liquid/solid ratio) were applied to test their effect on Pb removal. In general, the results of this study varied based on the effect of the variables.

scholarly journals Adsorptive Removal of Cobalt (II) and Chromium (III) from Aqueous Solution onto Citrus Limon Leaves Powder

2021 ◽  
Vol 10 (3) ◽  
pp. 2446-2458
Keyword(s):  
Heavy Metals ◽  
Aqueous Solution ◽  
Optimum Condition ◽  
Contact Time ◽  
Citrus Limon ◽  
Initial Concentration ◽  
Adsorptive Removal ◽  
Removal Process ◽  
Batch System

The growth of heavy metals in wastewater is a widespread concern that affects thousands of lives and spread diseases worldwide. Its extraction is subject of concert from last few decades. Looking forward in the current study, Citrus Limon leaves were used as an adsorbent for the Biosorption of Co(II) and Cr(III) in a batch system. Citrus Limon leaves were brought from the local garden of Amakhel, Tank, Pakistan. The removal process of Co(II) and Cr(III) was examined under different conditions of pH, contact time, and initial concentration to get the optimum condition. It was found optimum contact time for Co(II) and Cr(II) was 20 and 10 minutes. By the increase of concentration of adsorbate, the value of qe was investigated for Co(II) and Cr(III) at 20oC. The optimum initial concentration for Cr(III) and Co(II) was 60 ppm and 40 ppm, respectively. The optimum shaking power for Cr(III) and Co(II) was found to be 150 rpm and 120 rpm, respectively.

scholarly journals Kinetic studies of adsorption of Cu (II) from aqueous solution by coriander seeds (Coriandrum Sativum)

2018 ◽  
Vol 37 ◽  
pp. 02005
Author(s):  
L. Kadiri ◽  
A. Lebkiri ◽  
E.H. Rifi ◽  
A. Ouass ◽  
Y. Essaadaoui ◽  
...  
Keyword(s):  
Heavy Metals ◽  
Aqueous Solution ◽  
Contact Time ◽  
Copper Ions ◽  
Copper Ion ◽  
Kinetic Studies ◽  
Spectroscopic Technique ◽  
Coriandrum Sativum ◽  
Ion Concentration ◽  
Potential Tool

The adsorption of copper ions Cu2+ by Coriandrum Sativum seeds (CSS) from aqueous solution was studied in order to highlight the importance of coriander seeds as a potential tool in the treatment of wastewaters containing heavy metals. The kinetic studies of adsorption of Cu (II) were discussed using the spectroscopic technique “Inducting Coupled Plasma” (ICP). The effects of initial copper ion concentration and contact time were determined. All results show that coriander seeds have, over their culinary and medicinal benefits, a significant adsorbent power of copper ions.

Zinc removal from aqueous solution using novel adsorbent MISCBA

2016 ◽  
Vol 6 (3) ◽  
pp. 377-388 ◽  
Author(s):  
Ibrahim Umar Salihi ◽  
Shamsul Rahman Muhamed Kutty ◽  
Muhamed Hasnain Isa ◽  
Nasir Aminu
Keyword(s):  
Heavy Metals ◽  
Aqueous Solution ◽  
Metal Ions ◽  
Contact Time ◽  
Adsorption Process ◽  
Negative Impact ◽  
Batch Adsorption ◽  
Maximum Adsorption Capacity ◽  
Adsorbent Dosage ◽  
Zinc Removal

Pollution caused by heavy metals has become a serious problem to the environment nowadays. The treatment of wastewater containing heavy metals continues to receive attention because of their toxicity and negative impact on the environment. Recently, various types of adsorbents have been prepared for the uptake of heavy metals from wastewater through the batch adsorption technique. This study focused on the removal of zinc from aqueous solution using microwave incinerated sugarcane bagasse ash (MISCBA). MISCBA was produced using microwave technology. The influence of some parameters such as pH, contact time, initial metal concentration and adsorbent dosage on the removal of zinc was investigated. The competition between H+ and metal ions has affected zinc removal at a low pH value. Optimum conditions for zinc removal were achieved at pH 6.0, contact time 180 min and adsorbent dosage of 10 g/L, respectively. The maximum adsorption capacity for the removal of zinc was found to be 28.6 mg/g. The adsorption process occurred in a multilayered surface of the MISCBA. Chemical reaction was the potential mechanism that regulates the adsorption process. MISCBA can be used as an effective and cheap adsorbent for treatment of wastewater containing zinc metal ions.

scholarly journals Moringa-functionalized rice husk ash adsorbent for the removal of amoxicillin in aqueous solution

2019 ◽  
Vol 268 ◽  
pp. 01005 ◽  
Author(s):  
Maria Patrichia Oliva ◽  
Clinton Corral ◽  
Michael Jesoro ◽  
John Raymond Barajas
Keyword(s):  
Aqueous Solution ◽  
Rice Husk ◽  
Low Income ◽  
Contact Time ◽  
Rice Husk Ash ◽  
Aqueous Media ◽  
Drug Resistant ◽  
Practical Solution ◽  
Significant Difference ◽  
Treatment Facilities

Lack of stringent policies requiring water treatment facilities to combat occurrence of residual antibiotics in effluents critically impairs the resiliency of low-income communities to drug-resistant pathogens. In an attempt to mitigate the effects of residual drugs in aqueous media, we investigate the extent to which rice husk ash (RHA) functionalized by Moringaoleifera protein (MOP) sequestrates amoxicillin in solution. A semi-factorial design was implemented to evaluate the influence of initial amoxicillin concentration, initial MOP functionalized RHA dosage, and contact time on the removal on amoxicillin in water. Results of our experiments have shown that MOP functionalization enhanced RHA by doubling its rate to sequestrate amoxicillin molecules in solution. This strongly indicated that MOP adhered on the surface of RHA significantly improved its capacity to remove amoxicillin contamination in aqueous solution. Statistical analysis employed further supported our results by implying a significant difference between the performance of MOP-functionalized and bare RHA. In conclusion, our results strongly suggest that MOP functionalization can be a potential practical solution to alleviate the vulnerability of communities to emerging antibiotic pollution.

Sign in / Sign up

Export Citation Format

Share Document