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Due to the severe pollution taken place in Taihu Lake, the investigation of water source quality in Taihu Lake is urgent for the development of drinking water treatment processes. Water samples taken from two water source areas in Taihu Lake were analyzed. The results showed that ammonia, TN, TP and CODMn were the dominant contaminants. The concentrations of those contaminants all exceeded “surface...
The montmorillonite was modified by AlCl3 and was used to remove the fluorine in the drinking water. The factors of influencing the fluorine removal rate, including the concentration of AlCl3 and the mass of the adsorbent, was studied in the research. The fluorine removal percentage was 97% by 10 g/L modified montmorillonite in the 10 mg/L fluorine solution at pH7, 25+2°C. The results suggest that...
The ability to remove arsenic (III) by P.vittata and C.demersum in hydroponic condition was investigated in this study. The results showed that P.vittata is more tolerant under the As press with high concertration.The maximum As concertration that two speices can endure is 10 mg/L. The maximum qe(As bioaccumulation per mass of adsorbent) of P.vittata and C.demersum is separately 9266.67 mg/kg and...
In the pilot scale test, three kinds of typical natural solid phase materials, such as cotton, anthracite and walnut shells, were used as biological denitrification carbon sources in the remediation of nitrite contaminated groundwater. The results indicated that when the influent concentration of nitrate was about 30mg/L, the nitrate removal of the reactors with cotton and walnut shells as carbon...
The natural paly gorskite modified was as reactive media of PRB. Based on the investigation of effect of specific hydro chemical factors, such as Fe2+, Fe3+, Mn2+, NO3-, SO42- etc.,on remediation efficiency of petroleum contaminated groundwater, the dynamics, isothermal adsorption model and characterization of reactive media were studied. The results showed that the effect of purifying TPH with the...
We present a human centric cyber physical framework architecture of our in-pipe water monitoring and feedback system. This system comprises of the physical water distribution infrastructure, together with the hardware and software supported intelligent agents for water allotment, leak detection and contamination spread control. An agent-based approach for connecting the cyber and physical layers is...
The efficiency of electrokinetic remediation of Cu contaminated groundwater was researched by means of experiments for the complicated remediation of groundwater contaminated by typical heavy metal in this paper, and migration and variation characteristics of Cu was analyzed too. The experimental results indicated that the pH value varied obviously during the electrokinetic remediation because of...
Fluoride contamination is present in most groundwater resources and aluminium (Al) based techniques are mostly adopted for defluoridation of water because of the high affinity between aluminium and fluorides. The presence of residual aluminium in treated drinking water has become a cause of worldwide concern and aluminium based coagulants have come under scrutiny with findings of neuro-toxicity when...
Filter media is the most pivotal element of artificial soil filtration system and directly impact the reduction of contaminants in runoff. Four typical filtration materials including sand soil, boiler slag, furnace cinder and ceramsite are selected and studied in laboratory scale in Beijing. The experiment is carried by two stages. One is selection of filtration media. Firstly, different materials'...
The produced water of oilfield is one of the primary contaminative sources of oilfield ecosystem, which includes large quantity of dirty mire mixed with the oil, sulfide, etc. Meanwhile, its direct rowing would result in serious pollution. Purifying this kind of produced water has been emphasized by more and more oil-fields. This paper presented the control algorithm of PH which is based on the PH...
Laboratory experimental studies were carried out on river water, reservoir water and enriched natural organic mater (NOM) to evaluate the effect of Br- brought about by seawater intrusion on the formation of trihalomethane (THM). The experimental results indicated that the quality of river raw water and reservoir water collected was good with a TOC of less than 2.5 mg/L and a maximum THM formation...
Pulsed high-voltage discharge is a new advanced oxidation water treatment technology. Plasma technology has recently become significant because it offers the advantages of lower costs, higher treatment and energy efficiencies, and the smaller space volume it occupies. The present work investigates the use of a multi-needle plate reactor with gas-liquid hybrid discharge system to sterilize ballast...
The presence of enteric viruses in drinking water is a potential health risk. Growing interest has arisen in nanometals for water disinfection, in particular the use of silver based nanotechnology. In this study, Lactobacillus fermentum served as reducing agent and bacterial carrier matrix for zerovalent silver nanoparticles, referred to as biogenic Ag0. The antiviral action of biogenic Ag0 was examined...
Endocrine Disruptors, which is trace but more and more noted in aquatic environment, has a significant effect on people's hormone systems. The estradiol (E2) was a research object, and the effects of solution parameters (concentration, pH, ionic strength and natural organic matter (NOM) ) on the retention of trace E2 by nanofiltration membrane (NF) (BDXN-90 polyamind aromatic compound membrane) filtration...
Since humic acid from water causes considerable serious health-risk factors, powerful methods for the removal of those have received increasing attention over the past decade. In this paper, the available technologies for removal of humic acid from water are briefly reviewed, and the recent advancements are summarized. Fundamentals and main applications of typical methods such as filtration, flocculation...
Ammonia addition and pH depression can inhibit the formation of bromate in ozonated drinking water by reacting with free bromine (HOBr/OBr-), an intermediate in bromate formation, to form bromamines and other bromoorganic disinfection byproducts. This study was performed to assess the effects of ammonia and pH value combinations on the formation of bromate and THMs during ozonation and chlorination...
There is a globally increasing issue that groundwater contamination by nitrogenous fertilizer in the contemporary world, however as an important water, groundwater always serves, especially in rural region. To address this problem, biological nitrification and denitrification course has been pervalently used for removal of nitrogenous pollutants from polluted groundwater. The dissolved oxygen (DO)...
The adsorption, desorption and species distribution characteristics of Cu and Zn in the sediments with or without montmorillonite spiked were investigated by isothermal adsorption and sequential extraction procedure. The results show that the montmorillonite spiked in the sediments enhanced the adsorption capacity of sediments for Cu and Zn and facilitated the transformation of Cu and Zn from less...
Effects of initial nitrate concentrations and heavy metals on autohydrogenotrophic denitrification were investigated in batch tests to eliminate nitrate from the contaminated drinking water. Nitrate was reduced completely without nitrite accumulation at low initial concentration of nitrate (15 mg N/L), with nitrite accumulation at intermediate initial concentrations (70, and 100 mg N/L), and the denitrification...
The method of detecting dehydrogenase activity (DHA) of algae in fresh water was studied. The determining conditions were researched with respect to TTC concentration, incubating temperature and duration, and selection of extractants. Compared with the method of chlorophyll a, it performed a better precision, and was easy and simple to practice.
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