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

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 Adsorption Studies of Chromium by Using Low Cost Adsorbents

Our Nature ◽  
2013 ◽  
Vol 11 (1) ◽  
pp. 11-16 ◽  
Author(s):  
N. Gandhi ◽  
D. Sirisha ◽  
K.B. Chandra Sekhar
Keyword(s):  
Heavy Metals ◽  
Aqueous Solution ◽  
Contact Time ◽  
Low Cost ◽  
Water Bodies ◽  
Batch Adsorption ◽  
Toxic Heavy Metals ◽  
Adsorption Studies ◽  
Chromium Vi ◽  
Aqueous Streams

The presence of toxic heavy metals such as chromium (VI) contaminants in aqueous streams, arising from the discharge of untreated metal containing effluents into water bodies, is one of the most important environmental problems. Adsorption is one of the effective techniques for chromium (VI) removal from wastewater. In the present study, adsorbent was prepared from low cost adsorbents and studies were carried out for chromium (VI) removal. Batch adsorption studies demonstrated that the adsorbents had significant capacity to adsorb the chromium from aqueous solution. It was found that the adsorption increased with increase in contact time and adsorbent dosage. An attempt was made to study mixed algae as an adsorbent for removal of chromium (VI).DOI: http://dx.doi.org/10.3126/on.v11i1.8238 Our Nature Vol.11(1) 2013: 11-16?

scholarly journals Removal of cadmium from aqueous solutions using excised leaves of Quetta pine (Pinus halepensis Mill.)

2015 ◽  
Vol 43 (3) ◽  
pp. 277-281 ◽  
Author(s):  
M Rahman ◽  
S Gul ◽  
M Ajmal ◽  
A Iqbal ◽  
Akk Achakzai
Keyword(s):  
Aqueous Solution ◽  
Contact Time ◽  
Pinus Halepensis ◽  
Freundlich Isotherm ◽  
Batch Adsorption ◽  
Adsorption Efficiency ◽  
Cadmium Removal ◽  
Optimum Ph ◽  
Maximum Contact ◽  
Adsorbent Dose

Removal of cadmium from aqueous solution was studied by using Quetta pine (Pinus halepensis Mill.) leaves. Batch adsorption experiments were performed as a function of appropriate equilibrium time, pH, concentration of adsorbate and amount of adsorbent. The optimum pH required for maximum adsorption was found to be 7.0 and the maximum contact time for the equilibrium was 30 minutes at adsorbent dose of 10 g. The maximum adsorption efficiency of cadmium removal was 98.50%. The results were better fitted by Langmuir than Freundlich isotherm. The separation factor of equilibrium 0.12 and 0.67 showed that Quetta pine leaves are good adsorbent of cadmium from aqueous solution DOI: http://dx.doi.org/10.3329/bjb.v43i3.21598 Bangladesh J. Bot. 43(3): 277-281, 2014 (December)

scholarly journals Biosorption of Zn(II) in High and Low Strength Synthetic Wastewater by Watermelon Rind (Citrullus lanatus)

2015 ◽  
Vol 773-774 ◽  
pp. 1286-1290 ◽  
Author(s):  
M.F.H. Azizul-Rahman ◽  
A.A. Mohd Suhaimi ◽  
Norzila Othman
Keyword(s):  
Heavy Metal ◽  
Contact Time ◽  
Metal Removal ◽  
Citrullus Lanatus ◽  
Heavy Metal Removal ◽  
High Strength ◽  
Synthetic Wastewater ◽  
Watermelon Rind ◽  
Optimum Ph ◽  
Low Strength

The heavy metal contain in the industrial wastewater can cause a pollution towards the environment and human due to its toxicity. Therefore extensive studies were conducted for the heavy metal removal. This study was conducted under several conditions by varying pH, biosorbent dosage, initial wastewater concentration and contact time. The results revealed that optimum pH, for high strength synthetic wastewater was 8.0 meanwhile for low strength synthetic wastewater was 7.0. Both high and low strength synthetic wastewater was optimum at 30 minutes of contact time with 1.5g and 0.02g of bisorbent dosage respectively. Meanwhile, the optimum initial metal concentration for high and low strength synthetic wastewater was 400ppm and 1ppm respectively. The results had proven that watermelon rind is able to treat wastewater with high and low concentration of metal.

Adsorption Behavior of Barley Straw Carbon for Chromium (VI) Ion

2008 ◽  
Vol 569 ◽  
pp. 213-216
Author(s):  
Rumi Chand ◽  
Takanori Watari ◽  
Toshio Torikai ◽  
Mitsunori Yada ◽  
Katsutoshi Inoue
Keyword(s):  
Aqueous Solution ◽  
Porous Carbon ◽  
Contact Time ◽  
Barley Straw ◽  
Loading Capacity ◽  
Reduction Mechanism ◽  
Total Chromium ◽  
Chromium Vi ◽  
Optimum Ph ◽  
Effects Of Ph

Porous carbon having surface area of 792 m2g-1 was prepared from barley straw by carbonization at 800 oC at a heating rate of 5 oCmin-1 to test the chromium (VI) adsorption from aqueous solution. The effects of pH, contact time and equilibrium Cr (VI) concentration on the adsorption were studied in detail. The optimum pH for Cr (VI) removal was found to be 2. The adsorption of Cr (VI) was very rapid and equilibrium was reached within 1 h. It was interpreted in terms of adsorption-coupled reduction mechanism. Accompanied by the decrease of Cr (VI) ion, Cr (III) ion was slightly released in the solution. Maximum loading capacity of total chromium was found to be 2.35 molkg-1 at pH 2.

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.

scholarly journals Polyaniline Modified with Cobalt-Hexacyanoferrate (PmCH) as an Adsorbent for Removal of Heavy Metals from Aqueous Solutions

2018 ◽  
Vol 51 ◽  
pp. 03004
Author(s):  
Nima Moazezi ◽  
Mohammad Ali Moosavian
Keyword(s):  
Heavy Metals ◽  
Ionic Strength ◽  
Aqueous Solutions ◽  
Metal Ions ◽  
Contact Time ◽  
Ion Concentration ◽  
Adsorption Capacities ◽  
Cobalt Hexacyanoferrate ◽  
Optimum Ph ◽  
Removal Of Heavy Metals

In this study, polyaniline modified with cobalt-hexacyanoferrate (PmCH) composite was synthesized and characterized for removal of Rb+, Cd2+, Zn2+, Pb2+, and Ni2+ by FTIR and XRD. The effect of pH, adsorbent dosage, ionic strength, contact time, initial ion concentration, and temperature were studied. The competition adsorption experiments between metal ions were investigated. Batch desorption was also conducted to evaluate the reusability of PmCH. The maximum adsorption capacities were 96.15, 27.17, 17.85, 19.15, and 4.76 mg g-1 of Rb+, Cd2+, Zn2+, Pb2+, and Ni2+, respectively. The optimum pH was determined at natural pH of each solution.

scholarly journals Valorization of Wasted Black Tea as a Low-Cost Adsorbent for Nickel and Zinc Removal from Aqueous Solution

2016 ◽  
Vol 2016 ◽  
pp. 1-8 ◽  
Author(s):  
Amirhossein Malakahmad ◽  
Sandee Tan ◽  
Saba Yavari
Keyword(s):  
Aqueous Solution ◽  
Metal Ions ◽  
Contact Time ◽  
Low Cost ◽  
Black Tea ◽  
High Porosity ◽  
Sorption Data ◽  
Zinc Removal ◽  
High Concentrations ◽  
Effective Sorbent

Characteristics and efficiency of wasted black tea (WBT) were investigated as a low-cost sorbent in removal of Ni2+and Zn2+ions from aqueous solution. Initial findings showed WBT potential to be applied as an effective sorbent due to high concentrations of carbon and calcium and high porosity and availability of functional groups. Sorption dynamics were studied with varying pH, contact time, and adsorbent dose. Maximum percentages of metal ions removal were recorded at pH 5, contact time 250 min, and 20 g/L of adsorbent concentration. Binary metal sorption studies showed that Ni2+and Zn2+do not compete with each other for available sorption sites, so the adsorption trend in binary system appears similar to monocomponent metal adsorption. Evaluation of the isotherms confirmed that WBT has high value of adsorption capacity. Sorption data fitted well with both Freundlich and Langmuir models. In the optimum conditions, maximum capacity of WBT could reach up to 90.91 mg-Ni/g adsorbent and 166.67 mg-Zn/g adsorbent. This experiment demonstrated the ability of tea waste as an effective, sustainable, and low-cost adsorbent for removal of the heavy metal ions.

scholarly journals Rice Husk Coated Chitosan Biocomposite as an Adsorbent for Cadmium Removal from Aqueous

2020 ◽  
Vol 11 (1) ◽  
pp. 7746-7753
Keyword(s):  
Aqueous Solution ◽  
Rice Husk ◽  
Contact Time ◽  
Xrd Analysis ◽  
Cadmium Removal ◽  
Adsorbent Dosage ◽  
Ph Values ◽  
Green Adsorbent ◽  
Optimum Ph ◽  
Stirring Time

The main goal of this research was to evaluate the effectiveness of rice husk coated with chitosan as a green adsorbent for the removal of cadmium (II) in aqueous solution. The properties of prepared rice husk-chitosan (Chi-RH) were characterized using SEM, FTIR, and XRD analysis. The main parameters that influence cadmium sorption on the Chi-RH biocomposites were evaluated at different stirring and contact time, adsorbent dosage, and pH values. The results indicated that the best stirring time and contact time was 360 mins and 60 mins, respectively. The optimum adsorbent dosage was 1.0 g/L, with the highest percentage removal of 99%, and the optimum pH was 9. This study concluded that the Chi-RH biocomposites have the high ability as a green adsorbent for cadmium removal in aqueous solution and simultaneously reducing the environmental impact.

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