scholarly journals Preparation and Mechanism of a New Enhanced Flocculant Based on Bentonite for Drinking Water

2015 ◽  
Vol 2015 ◽  
pp. 1-8 ◽  
Author(s):  
Feng-shan Zhou ◽  
Jie Li ◽  
Lin Zhou ◽  
Yang Liu
Keyword(s):  
Drinking Water ◽  
Ferrous Sulfate ◽  
Metal Ion ◽  
Aluminum Sulfate ◽  
Removal Rate ◽  
Metal Ion Removal ◽  
Drinking Water Standard ◽  
Aluminum Ions ◽  
Heavy Metal Ion Removal ◽  
Base Composite

Bentonite is characterized by the large specific surface, good adsorption, ion exchange ability, and nontoxicity. An enhanced bentonite base composite flocculant (BTA) can be prepared from treating the calcium base bentonite and compositing various functional additives. Bentonite was firstly treated by citric acid, then the talc and activated carbon turned to be acid part and simultaneously the part that was treated by sodium bicarbonate and calcium hydroxide turned to be alkaline part, and finally the acid bentonite part and alkaline bentonite part were mixed up with preground powder of polymeric chloride aluminium (PAC), cationic polyacrylamide (CPAM), ferrous sulfate, and aluminum sulfate, and after all of the processing flocculant BTA was obtained. The optimum preparation process of flocculant BTA has shown 29.5% acid bentonite part, 29.5% alkaline bentonite part, 15% PAC, 1% CPAM, 5% ferrous sulfate, and 20% aluminum sulfate. BTA was used to treat drinking water with high turbidity and metal ion in Karamay City, Xinjiang. The treated water was surely up to the drinking water standard of China in decolorization rate, deodorization rate, heavy metal ion removal rate, and so forth, and contents of residual aluminum ions and acrylamide monomer in drinking water were considerably decreased.

Experimental Study of Cement on Heavy Metal Ion Removal

2014 ◽  
Vol 1073-1076 ◽  
pp. 889-893
Author(s):  
Zhi Jin Fan ◽  
Jin Chuan Gu ◽  
Yi Chen ◽  
Yong Xin Jin ◽  
Min Yin ◽  
...  
Keyword(s):  
Experimental Data ◽  
Heavy Metal ◽  
Metal Ion ◽  
Removal Rate ◽  
Ion Concentration ◽  
Metal Ion Removal ◽  
Ion Removal ◽  
Heavy Metal Ion Removal ◽  
Stirring Time ◽  
Metal Properties

Utilize cement specific surface area is larger and neutralizes the acidic aqueous ,which can adsorb heavy metal,properties and can precipitate heavy metal.Study on removal rate of Cu2+,Pb2 +, Zn2 +, Cd2 +. By study the properties of the cement and analyzing the experimental data on the cement dosage,the ion concentration,PH and the stirring time, the results show that cement has better adsorption and the effect of precipitation on the above four kinds of ion, removal rate increased with increasing PH,the mount of dosage and stirring time.

scholarly journals Fabrication of mesoporous lignin-based biosorbent from rice straw and its application for heavy-metal-ion removal

2017 ◽  
Vol 53 ◽  
pp. 132-140 ◽  
Author(s):  
Fang Xu ◽  
Ting-Ting Zhu ◽  
Qing-Quan Rao ◽  
Sheng-Wen Shui ◽  
Wen-Wei Li ◽  
...  
Keyword(s):  
Heavy Metal ◽  
Rice Straw ◽  
Metal Ion ◽  
Heavy Metal Ion ◽  
Metal Ion Removal ◽  
Ion Removal ◽  
Heavy Metal Ion Removal

Role of nanomaterials as adsorbents in heavy metal ion removal from waste water: A review

2020 ◽  
Vol 33 ◽  
pp. 101038 ◽  
Author(s):  
Shweta Wadhawan ◽  
Ayushi Jain ◽  
Jasamrit Nayyar ◽  
Surinder Kumar Mehta
Keyword(s):  
Waste Water ◽  
Heavy Metal ◽  
Metal Ion ◽  
Heavy Metal Ion ◽  
Metal Ion Removal ◽  
Ion Removal ◽  
Heavy Metal Ion Removal

scholarly journals Copper Ions Removal from Water using A2B3 Type Hyperbranched Poly(amidoamine) Hydrogel Particles

Molecules ◽  
2019 ◽  
Vol 24 (21) ◽  
pp. 3866
Author(s):  
Hojung Choi ◽  
Youngsik Eom ◽  
Sanghwa Lee ◽  
Sang Youl Kim
Keyword(s):  
Metal Ion ◽  
Copper Ions ◽  
Suspension Polymerization ◽  
Spherical Shape ◽  
Synthetic Process ◽  
Metal Ion Removal ◽  
Hyperbranched Poly ◽  
Sorption Ability ◽  
Heavy Metal Ion Removal ◽  
High Sorption

Micrometer-sized hyperbranched poly(amidoamine) (hPAMAM) particles are prepared with a simple A2B3 type Aza–Michael addition reaction between aminoethylpiperazine (AEP) and methylenebisacrylamide (MBA) in an inverse suspension polymerization condition. The synthesized particles exhibited surprisingly high Cu2+ sorption capacity (0.223g/g) for a solid-type absorbent. In addition to the high sorption ability of the particle, its simple synthetic process and convenience, due to its micrometer-sized spherical shape and recyclability, make it a practical and attractive absorbent for heavy metal ion removal from aqueous solutions.

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