Cation-exchange kinetics and electrical conductivity studies of an ‘organic-inorganic’ composite cation-exchanger: Polypyrrole Th(IV) phosphate

2007 ◽  
Vol 105 (5) ◽  
pp. 2806-2815 ◽  
Author(s):  
Asif Ali Khan ◽  
Inamuddin
Keyword(s):  
Electrical Conductivity ◽  
Cation Exchange ◽  
Cation Exchanger ◽  
Exchange Kinetics ◽  
Inorganic Composite

Co-composting of distillery and winery wastes with sewage sludge

2007 ◽  
Vol 56 (2) ◽  
pp. 187-192 ◽  
Author(s):  
M.A. Bustamante ◽  
C. Paredes ◽  
R. Moral ◽  
J. Moreno-Caselles ◽  
M.D. Pérez-Murcia ◽  
...  
Keyword(s):  
Electrical Conductivity ◽  
Sewage Sludge ◽  
Cation Exchange ◽  
Cation Exchange Capacity ◽  
Exchange Capacity ◽  
Total N ◽  
Organic C ◽  
Mediterranean Countries ◽  
Feasible Option ◽  
Total Organic C

The winery and distillery wastes (grape stalk and marc (GS and GM, respectively), wine lees (WL) and exhausted grape marc (EGM)) are produced in great amounts in the Mediterranean countries, where their treatment and disposal are becoming an important environmental problem, mainly due to their seasonal character and some characteristics that make their management difficult and which are not optimised yet. Composting is a treatment widely used for organic wastes, which could be a feasible option to treat and recycle the winery and distillery wastes. In this experiment, two different piles (pile 1 and 2) were prepared with mixtures of GS, GM, EG and sewage sludge (SS) and composted in a pilot plant by the Rutgers static pile composting system. Initially, GS, GM and EGM were mixed, the pile 1 being watered with fresh collected vinasse (V). After 17 days, SS was added to both piles as a nitrogen and microorganisms source. During composting, the evolution of temperature, pH, electrical conductivity, total organic C, total N, humic acid-like C and fulvic acid-like C contents, C/N ratio, cation exchange capacity and germination index of the mixtures were studied. The addition of V in pile 1 produced higher values of temperature, a greater degradation of the total organic C, higher electrical conductivity values and similar pH values and total N contents than in pile 2. The addition of this effluent also increased the cation exchange capacity and produced a longer persistence of phytotoxicity. However, both piles showed a stabilised organic matter and a reduction of the phytotoxicity at the end of the composting process.

Electrical conductivity and acetaldehyde vapour sensing studies on synthetic polypyrrole–titanium(iv)sulphosalicylophosphate nanocomposite cation exchange material

2016 ◽  
Vol 40 (3) ◽  
pp. 2200-2210 ◽  
Author(s):  
Asif Ali Khan ◽  
Rizwan Hussain ◽  
Shakeeba Shaheen
Keyword(s):  
Electrical Conductivity ◽  
Cation Exchange ◽  
Conducting Material ◽  
Exchange Material

Polypyrrole–titanium(iv)sulphosalicylophosphate composite is a better sensing as well as conducting material than polypyrrole in the semiconducting range.

Investigation of the Exchange Kinetics and Surface Recovery of CdxHg1–xTe Quantum Dots during Cation Exchange Using a Microfluidic Flow Reactor

2017 ◽  
Vol 29 (7) ◽  
pp. 2756-2768 ◽  
Author(s):  
Stephen V. Kershaw ◽  
Nema M. Abdelazim ◽  
Yihua Zhao ◽  
Andrei S. Susha ◽  
Olga Zhovtiuk ◽  
...  
Keyword(s):  
Quantum Dots ◽  
Cation Exchange ◽  
Flow Reactor ◽  
Microfluidic Flow ◽  
Exchange Kinetics
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