Enhanced coagulation coupled with heavy metal capturing for heavy metals removal from coal gasification brine and a novel mathematical model

2021 ◽  
Vol 40 ◽  
pp. 101954
Author(s):  
Mengqi Zheng ◽  
Zhe Sun ◽  
Hongjun Han ◽  
Zhengwen Zhang ◽  
Wencheng Ma ◽  
...  
Keyword(s):  
Heavy Metals ◽  
Mathematical Model ◽  
Heavy Metal ◽  
Coal Gasification ◽  
Enhanced Coagulation ◽  
Heavy Metals Removal ◽  
Metals Removal

scholarly journals Removal of Nutrients and Selected Heavy Metals in Wet Market Wastewater by Using Microalgae Scenedesmus Sp.

2015 ◽  
Vol 773-774 ◽  
pp. 1210-1214 ◽  
Author(s):  
Noor Maisara bte Jais ◽  
Radin Maya Saphira bte Radin Mohamed ◽  
Wan Asma Wan Mohamad Apandi ◽  
Hazel Monica Matias Peralta
Keyword(s):  
Heavy Metals ◽  
Heavy Metal ◽  
Sampling Technique ◽  
Experimental Result ◽  
Grab Sampling ◽  
Heavy Metals Removal ◽  
Public Market ◽  
Metals Removal ◽  
Wet Market ◽  
Raw Wastewater

The wet market wastewater may lead to pollution, odour and aesthetic problems to the environment and society if not treating properly. Thus, this research was conducted to culture microalgae Scenedesmus sp. and to identify the optimal concentration of microalgae Scenedesmus sp.due to the nutrient and heavy metal removals from wet market wastewater based on laboratory scale. The samples were taken from Public Market Parit Raja, Batu Pahat at 9a.m. in the morning using grab sampling technique. The characteristics of raw wastewater and microalgae Scenedesmus sp. were determined. There are five sample wastewater (used 625ml for each five sample wastewater) with five different sample concentrations of microalgae which are 6.50x105, 49.88x104, 34.75x104, 19.63x104 and 49.88x104 cell/ml with 16 days as duration for period study. The microalgae were cultured by BBM for eight days and another eight days for treatment with replicates three times for each sample. The analysis were measured due to the nutrient and heavy metal removals which are TN, TP, TOC, Fe and Zn during eight days treatment process. Based on experimental result, the optimum efficiency removals for each concentration were achieved 45.6-86.4% of nutrients and heavy metals removal. The highest amount of nutrient and heavy metal removals after wastewater treatment by microalgae are TN 74.77%, TP 82.17%, TOC 86.36%, Fe 65.76% and Zn 84.14%. As conclusion for this experiment, Sample 2 (concentration 49.88x104 cell/ml of microalgae Scenedesmus sp.) is the optimum concentration due to the highest percentage of nutrients and heavy metals removal which achieved 65.3-82.1% which TN 65.32%, TP 76.77%, TOC 80.34%, Fe 65.76% and Zn 82.12%.

Heavy metal removal from waste waters by phosphonate metal organic frameworks

2018 ◽  
Vol 90 (1) ◽  
pp. 35-47 ◽  
Author(s):  
Bianca Maranescu ◽  
Lavinia Lupa ◽  
Aurelia Visa
Keyword(s):  
Heavy Metals ◽  
Heavy Metal ◽  
Aqueous Solutions ◽  
Metal Ions ◽  
Phosphonic Acid ◽  
Metal Organic Frameworks ◽  
Waste Waters ◽  
Heavy Metals Removal ◽  
Metals Removal ◽  
Metal Organic

AbstractThe increase attention in the area of phosphonate metal organic framework is exemplified with a variety of applications and a rich chemistry of these compounds. Water pollution caused by heavy metal ions is a major concern due to their toxicity to many life forms. In order to decrease the heavy metals impact upon the environment various technologies of water treatment such as: chemical sedimentation, ion exchange, redox process are studied. The tendency is to find a versatile and economical method of heavy metals removal from waste waters. Phosphonate metal organic frameworks were obtained by the reaction of Ni(CH3COO)2·4H2O, phosphonic acid (phosphonoacetic (CP), vinyl phosphonic acid (VP) and N,N-bis(phosphonomethyl)glycine (Gly)) in hydrothermal conditions. Coordination polymers synthesized were characterized by FTIR, XRD, scanning electron microscopy (SEM) and thermal gravimetric analysis (TGA). The adsorption processes represent a very good alternative for heavy metals removal due to low costs and ease of operation. In the present paper the adsorption performance of the mentioned materials in the removal process of heavy metals from aqueous solutions, was studied using the batch method. The adsorption conditions were investigated by varying the initial pH, contact time and adsorbate initial concentration for chromium metal ions removal from aqueous solutions. It was found that the adsorption efficiency of the studied materials in the removal process of Cr(VI) ions from aqueous solutions is in the following order: Ni-CP<Ni-Gly≤Ni-VP.

scholarly journals Heavy metals removal by EDTA-functionalized chitosan graphene oxide nanocomposites

RSC Advances ◽  
2017 ◽  
Vol 7 (16) ◽  
pp. 9764-9771 ◽  
Author(s):  
Asif Shahzad ◽  
Waheed Miran ◽  
Kashif Rasool ◽  
Mohsin Nawaz ◽  
Jiseon Jang ◽  
...  
Keyword(s):  
Heavy Metals ◽  
Heavy Metal ◽  
Graphene Oxide ◽  
Two Dimensional ◽  
Heavy Metals Removal ◽  
Metals Removal ◽  
Two Dimensional Materials

Graphene-based two-dimensional materials have been explored in a variety of applications, including the treatment of heavy-metal-rich water/wastewater.

Recent Application of the Various Nanomaterials and Nanocatalysts for the Heavy Metals’ Removal from Wastewater

NANO ◽  
2018 ◽  
Vol 13 (09) ◽  
pp. 1830006 ◽  
Author(s):  
Nader Ghaffari Khaligh ◽  
Mohd Rafie Johan
Keyword(s):  
Heavy Metals ◽  
Heavy Metal ◽  
Metal Ions ◽  
Heavy Metal Ions ◽  
Metal Removal ◽  
Heavy Metal Removal ◽  
Heavy Metals Removal ◽  
Metals Removal ◽  
Recent Developments ◽  
Carbon Based Nanomaterials

The pollution of water due to the release of heavy metals are particularly problematic and supplies of clean water have become a major problem worldwide. The heavy metal ions can cause toxicities and serious side effects toward human health; therefore, these metal ions should be removed from water and wastewater. A variety of strategies have been developed for efficient heavy metal removal from waters. Adsorption/ion exchange strategy play a great important role in removing heavy metal ions due to their advantages. Nanomaterials are excellent adsorbents and extensive studies have been performed to remove heavy metals from wastewater by developing and using various nanomaterials. Recent developments for the heavy metals removal by various nanomaterials, mainly including carbon-based nanomaterials, iron-based nanomaterials and photocatalytic nanomaterials in batch and flow systems are described in this review.

Metals Related to Radionuclides and Heavy Metals Removal Using Photosynthetic Bacteria Immobilized Recovery Type Porous Ceramic

2010 ◽  
Vol 46 (3) ◽  
pp. 119-127 ◽  
Author(s):  
KEN SASAKI ◽  
CHIHIRO HARA ◽  
KENJI TAKENO ◽  
HIROSHI OKUHATA ◽  
HITOSHI MIYASAKA
Keyword(s):  
Heavy Metals ◽  
Photosynthetic Bacteria ◽  
Porous Ceramic ◽  
Heavy Metals Removal ◽  
Metals Removal

Metals Removal and Recovery by Arthrobacter sp. Biomass

1992 ◽  
Vol 26 (9-11) ◽  
pp. 2149-2152 ◽  
Author(s):  
A. Grappelli ◽  
L. Campanella ◽  
E. Cardarelli ◽  
F. Mazzei ◽  
M. Cordatore ◽  
...  
Keyword(s):  
Heavy Metals ◽  
Heavy Metal ◽  
Industrial Wastes ◽  
Gram Negative Bacteria ◽  
Gram Negative ◽  
Real Possibility ◽  
Metals Removal ◽  
Metal Capture ◽  
Accumulation Of Metals ◽  
Removal And Recovery

Experiments on the real possibility of employing microorganisms to capture inorganic polluting substances, mainly heavy metals from urban and industrial wastes, are running using bacteria biomass. Many strains of Arthrobacter spp., gram-negative bacteria, diffused in the soil also inacondition of environmental stresses, have been proved to be particulary effective in heavy metal capture (Cd, Cr, Pb, Cu, Zn). The active and passive processes in accumulation of metals by bacteria were studied. Our experiments have been done on fluid biomass and on a membrane both for practical use and for an easy recovery.

Thin-film nanocomposite NF membrane with GO on macroporous hollow fiber ceramic substrate for efficient heavy metals removal

2021 ◽  
pp. 111040
Author(s):  
Ping Li ◽  
Yu-Xuan Li ◽  
Yu-Zhe Wu ◽  
Zhen-Liang Xu ◽  
Hai-Zhen Zhang ◽  
...  
Keyword(s):  
Thin Film ◽  
Heavy Metals ◽  
Hollow Fiber ◽  
Ceramic Substrate ◽  
Heavy Metals Removal ◽  
Metals Removal ◽  
Thin Film Nanocomposite

scholarly journals Technologies Developing in Heavy Metals’ Removal from Water

Water ◽  
2021 ◽  
Vol 13 (6) ◽  
pp. 860
Author(s):  
Konstantinos Simeonidis ◽  
Manassis Mitrakas
Keyword(s):  
Heavy Metals ◽  
Drinking Water ◽  
Water Resources ◽  
Human Health ◽  
Urban Wastewater ◽  
Heavy Metals Removal ◽  
Metals Removal ◽  
Drinking Water Resources

Elevated concentrations of heavy metals in drinking water resources and industrial or urban wastewater pose a serious threat to human health and the equilibrium of ecosystems [...]

scholarly journals Modified textile waste for heavy metals removal

2020 ◽  
Vol 6 ◽  
pp. 927-932 ◽  
Author(s):  
Patcharin Racho ◽  
Weesuda Waiwong
Keyword(s):  
Heavy Metals ◽  
Textile Waste ◽  
Heavy Metals Removal ◽  
Metals Removal

Technological Trends in Heavy Metals Removal from Industrial Wastewater: A Review

2021 ◽  
pp. 105688
Author(s):  
Rakesh Shrestha ◽  
Sagar Ban ◽  
Sijan Devkota ◽  
Sudip Sharma ◽  
Rajendra Joshi ◽  
...  
Keyword(s):  
Heavy Metals ◽  
Industrial Wastewater ◽  
Heavy Metals Removal ◽  
Metals Removal
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