Removal of heavy metals (Cr, Cu and Zn) from electroplating wastewater by electrocoagulation and adsorption processes

2020 ◽  
Vol 179 ◽  
pp. 263-271 ◽  
Author(s):  
Sohail Ayub ◽  
Asif Ali Siddique ◽  
Md. S. Khursheed ◽  
Ahmad Zarei ◽  
Izhar Alam ◽  
...  
Keyword(s):  
Heavy Metals ◽  
Electroplating Wastewater ◽  
Removal Of Heavy Metals ◽  
Adsorption Processes ◽  
Cu And Zn

scholarly journals Poly(amidoxime) ligand derived from waste palm fiber for the removal of heavy metals from electroplating wastewater

2020 ◽  
Vol 27 (27) ◽  
pp. 34541-34556 ◽  
Author(s):  
Md Lutfor Rahman ◽  
Choong Jian Fui ◽  
Mohd Sani Sarjadi ◽  
Sazmal E. Arshad ◽  
Baba Musta ◽  
...  
Keyword(s):  
Heavy Metals ◽  
Electroplating Wastewater ◽  
Palm Fiber ◽  
Removal Of Heavy Metals

Poly(hydroxamic acid) ligand from palm‐based waste materials for removal of heavy metals from electroplating wastewater

2020 ◽  
Vol 138 (2) ◽  
pp. 49671 ◽  
Author(s):  
Md Lutfor Rahman ◽  
Zhi Jian Wong ◽  
Mohd Sani Sarjadi ◽  
Mohd Harun Abdullah ◽  
Maria A. Heffernan ◽  
...  
Keyword(s):  
Heavy Metals ◽  
Hydroxamic Acid ◽  
Waste Materials ◽  
Electroplating Wastewater ◽  
Acid Ligand ◽  
Removal Of Heavy Metals

scholarly journals Performance evaluation of ceramic pot filters combined with adsorption processes for the removal of heavy metals and phenolic compounds

2021 ◽  
Author(s):  
Andrea Pérez-Vidal ◽  
Jorge Antonio Silva-Leal ◽  
Jaime Diaz-Gómez ◽  
Camilo J. Meneses-Torres ◽  
Juan E. Arias-Vallejo ◽  
...  
Keyword(s):  
Heavy Metals ◽  
Phenolic Compounds ◽  
Chemical Compounds ◽  
Colloidal Silver ◽  
Household Water Treatment ◽  
Chemical Contaminants ◽  
Household Level ◽  
Household Water ◽  
Removal Of Heavy Metals ◽  
Adsorption Processes

Abstract It has been demonstrated that the ceramic pot filters (CPFs) with impregnated colloidal silver are efficient for the removal of turbidity and pathogens for household water treatment. This investigation evaluated the efficiency of two filter models for the removal of chemical contaminants (Hg, Pb, As and phenolic compounds) during 175 days. The first model is a traditional CPF impregnated with colloidal silver and the second consists of the ceramic silver-impregnated pot plus a post-filtration column with granular activated carbon and zeolite (CPF + GAC-Z). The results of the CPF showed average efficiencies of 91.5% (Hg), 92% (Pb), 50.2% (As) and 78.7% (phenols). The CPF + GAC-Z showed similar efficiencies for the removal of heavy metals (92.5% Hg, 98.1% Pb and 52.3% As) and a considerably higher efficiency for the removal of phenols (96.4%). The As concentration of the filtered water in both systems was higher than the regulatory limit. The ceramic pot was responsible for the highest removal of chemical compounds. It can be concluded that the traditional CPF is a viable option for water supply treatment at the household level for the removal of chemical contaminants. The efficiency of this filter can be improved with the post-filtration column mainly for the removal of organic constituents.

scholarly journals Comparative studies on removal of heavy metals from electroplating wastewater through soil aquifer treatment (SAT) in conjunction with adsorbents

2020 ◽  
Vol 82 (10) ◽  
pp. 2148-2158
Author(s):  
K. H. Rekha ◽  
B. Lokeshappa
Keyword(s):  
Heavy Metals ◽  
Removal Efficiency ◽  
Statistical Approach ◽  
Water Discharge ◽  
Soil Aquifer Treatment ◽  
Electroplating Wastewater ◽  
Copper And Zinc ◽  
Nickel Copper ◽  
Removal Of Heavy Metals ◽  
Balance Analysis

Abstract The study demonstrates the efficiency of the soil aquifer treatment (SAT) towards removal of heavy metals within electroplating wastewater thereby rendering it suitable for ground water discharge. The unique proposition of this research is to use a combination of soil and adsorbent properties to enhance the remediation of heavy metals such as nickel, copper and zinc. A comparative study through statistical analysis is employed to illustrate the effectiveness of the various SAT systems build using various combinations of SM and SC soil types along with bioadsorbents such as eucalyptus leaves, sawdust and Mosambi peel. Further, the mass balance analysis of heavy metals is carried out to comprehend the course of expulsion. The study, through a statistical approach, endorses that the SAT in conjunction with adsorbent gives much better removal efficiency than the SAT without adsorbent. Additional removal efficiency of 14% to 30% can be achieved with introduction of adsorbents within the SAT system. The optimal removal efficiency of nickel, copper and zinc was observed to be at 87, 98 and 93% respectively when passed through the combination of SM soil with sawdust.

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 Removal of Heavy Metals Using Adsorption Processes Subject to an External Magnetic Field

Heavy Metals ◽  
2018 ◽  
Author(s):  
Ma. del Rosario Moreno Virgen ◽  
Omar Francisco González Vázquez ◽  
Virginia Hernández Montoya ◽  
Rigoberto Tovar Gómez
Keyword(s):  
Magnetic Field ◽  
Heavy Metals ◽  
External Magnetic Field ◽  
Removal Of Heavy Metals ◽  
Adsorption Processes

Application of Coconut Copra as Biosorbent for Removal of Heavy Metals

2019 ◽  
Vol 797 ◽  
pp. 3-12 ◽  
Author(s):  
Terri Zhuan Ean Lee ◽  
Siong Fong Sim
Keyword(s):  
Heavy Metals ◽  
Response Surface ◽  
Physical Adsorption ◽  
Equilibrium Phase ◽  
Isotherm Models ◽  
Batch Adsorption ◽  
Surface Models ◽  
Removal Of Heavy Metals ◽  
Adsorption Processes ◽  
Cr Removal

Previous studies have evidenced that coconut copra is a potential biosorbent for removal of dissolved organic carbon from peat swamp runoff attaining an average removal of 96 %. The capability of coconut copra in removing heavy metals including cadmium (Cd), chromium (Cr) and nickel (Ni) is scarcely reported. In this paper, response surface methodology was applied to evaluate the optimum conditions for removal of Cd, Cr and Ni from aqueous solution using raw coconut copra. Batch adsorption experiments were conducted according to inscribed central composite design. Response surface models further identified the optimum dosage, pH and contact time for Cd removal is 1.5 g, pH 11 and 60 min, Cr removal is 0.1 g, pH 8.48 and 60 min while Ni removal is 0.1 g, pH 11 and 15 min. Bimodality is observed in response surface graphs, implying the possible existence of two equilibrium phase during the adsorption process. Langmuir, Freundlich, Temkin and Dubinin-Radushkevich isotherm models were employed to describe the adsorption behaviour. Results revealed that raw coconut copra can remove 4.55 mg/g of Cd, 8.71 mg/g of Cr and 26.46 mg/g of Ni. The adsorption processes are physical adsorption.

Removal Of Heavy Metals From Electroplating Wastewater By Anaerobic Bacteria

2010 ◽  
Author(s):  
Wanggang Ma ◽  
Peide Sun ◽  
Yingqi Song ◽  
Yi Zhang ◽  
Jun Yin ◽  
...  
Keyword(s):  
Heavy Metals ◽  
Anaerobic Bacteria ◽  
Electroplating Wastewater ◽  
Removal Of Heavy Metals
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