New chemicals, based on the synergistic effect between inorganic polyaluminium salts and organic cationic polyelectrolytes, have been tested for the chemical optimization of a dissolved air flotation (DAF) unit, used as internal treatment of process waters in a paper mill based on 100% recovered paper. Laboratory tests have demonstrated that polyamine modifications of the aluminium salts are th...

The efficiency of various polyaluminium chloride coagulants (PACls) was compared to the efficiency of aluminium sulfate (alum) in the coagulation-flocculation process preceding direct filtration in drinking water treatment. The comparative study consisted of two separate yet complementary series of experiments: the first series included short (5-7 h) and long (24 h) filter runs conducted at a p...

Ferrihydrite is effective in arsenic removal because of the considerable amount of active hydroxyl groups. Solid–liquid separation of the arsenic adsorbed ferrihydrite from aqueous solution is important for the arsenic treatment technology. Coagulation is a promising process for ferrihydrite separation. Effects of different coagulants on arsenic adsorbed ferrihydrite settlement were investigate...

Pulp and paper mill effluent is highly polluting and is a subject of great environmental concern. In the present research we studied the removal of chemical oxygen demand (COD) and colour from paper mill effluent, using the coagulation process. A batch coagulation study was conducted using various coagulants such as aluminium chloride (AlCl3), polyaluminium chloride (PAC) and copper sulphate (C...

Abstract Polyaluminium chloride (PAC) with different basicity is used as a coagulant in most drinking water treatment plants (WTP). The aluminium concentration PAC and its hydrolysis mechanism varied the of PAC. Incremental addition changes various physico-chemical properties turbidity removal mechanisms water. Water use beyond optimum dose without considering other aspects, including residual ...

Abstract The paper presents the results of research on restoration shallow Lake Domowe Duże in Szczytno (area 0.6 km2, average depth 3.4m). Restoration treatments were carried out years 2010-2012 and consisted inactivation phosphorus using polyaluminium chloride. Technical was supported by biomanipulation consisting stocking lake with predatory fish. Water quality study before remediation annua...

Polyaluminium chloride (PAC) has been widely used as a chemical coagulant in water treatment. However, little is known about the impact of PAC performance on microbial community sediments. In this study, archaeal, bacterial, and fungal communities urban river sediments with without treatment were investigated. Prokaryotic diversity decreased at addition site (A2) increased along flow (from A3 t...

New chemicals, based on the synergistic effect between inorganic polyaluminium salts and organic cationic polyelectrolytes, have been tested previously at lab scale and the most efficient product has been selected for an industrial trial for a dissolved air flotation unit of a paper mill based on 100% recovered paper (Part 1 of this work). A polyaluminium nitrate sulphate salt combined with a q...

A large amount of collectors, inhibitors and modifiers such as oleic acid, water glass sodium carbonate are added to the flotation processing tungsten ore, resulting in difficulty suspended solids (SS) with residual settling down wastewater. The removal efficiency is low commonly used reagents like polyaluminium chloride (PAC) polyacrylamide (PAM). This paper innovatively applied calcium (CaCl2...

The application of lanthanum modified bentonite (Phoslock®) and polyaluminium chloride (PAC) is popular in the restoration European temperate lakes; however, effects on concentrations phosphorus (P) both water sediments have been poorly evaluated to date. We studied Phoslock® + PAC total (TP), particulate (PP), soluble reactive (SRP), suspended solids (TSS) chlorophyll a (Chla) water, different...