There is a nationwide need among policy and decision makers and drinking water supply engineers in India to obtain an initial assessment of water quality parameters for the selection and subsequent development of new riverbank filtration (RBF) sites. Consequently, a snapshot screening of organic and inorganic water quality parameters, including major ions, inorganic trace elements, dissolved organic carbon (DOC), and 49 mainly polar organic micropollutants (OMPs) was conducted at 21 different locations across India during the monsoon in June–July 2013 and the dry non-monsoon period in May–June 2014. At most existing RBF sites in Uttarakhand, Jammu, Jharkhand, Andhra Pradesh, and Bihar, surface and RBF water quality was generally good with respect to most inorganic parameters and organic parameters when compared to Indian and World Health Organization drinking water standards. Although the surface water quality of the Yamuna River in and downstream of Delhi was poor, removals of DOC and OMPs of 50% and 13%–99%, respectively, were observed by RBF, thereby rendering it a vital pre-treatment step for drinking water production. The data provided a forecast of the water quality for subsequent investigations, expected environmental and human health risks, and the planning of new RBF systems in India.

The system CuO-NiO-P 4 O 10 was investigated using a solid state reaction between CuO, NiO, and (NH 4 ) 2 HPO 4 in quartz crucibles at 900°C. The powder samples were characterized by X-ray diffraction, TG/DTA, electrochemical measurements, IR, and UV/Vis spectroscopy. Single crystals of a new quaternary phase Cu 3 NiO(PO 4 ) 2 were achieved by cooling the melted compound in a sealed, evacuated quartz ampoule. Cu 3 NiO(PO 4 ) 2 crystallizes in the monoclinic space group P2 1 /n (no 14) with a = 8.2288 (2) Å, b = 9.8773(2) Å, c = 8.2777(3) Å, β = 107.82(2)°, Z = 4. The three-dimensional framework * Prof. Dr. J. Feller E-Mail: feller@htw-dresden.de [a] Chemieingenieurwesen

A novel treatment was tested with groundwater to investigate its arsenic removal under natural conditions. The system utilised in-line electrochlorination to oxidise water constituents without the need for external chemical supply. The oxidised arsenic and iron co-precipitated and were filtered via Greensand Plus™. The filter was catalytically active and provided an emergency oxidant. The system had only a few maintenance requirements due to online water quality monitoring. The contaminant removal during the field test in Costa Rica was impaired by strong fluctuations in water quality including low iron concentrations. However, the system removed on average 68% of the arsenic. Mean values of arsenic were 40 ± 23 μg/L in groundwater and 13 ± 6 μg/L in treated water. Iron was removed from an average of 2.8 ± 2.4 mg/L to 0.2 ± 0.2 mg/L (93% removal). Free chlorine produced and available in the treated water tank had a mean concentration of 1.25 mg/L and 0.64 mg/L, respectively.

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Two solid solution series exist in the system MgMoO 4 -NiMoO 4 . The α-Ni 1-y Mg y MoO 4 solution series, isostructural to α-NiMoO 4 , is thermodynamically stable at ambient conditions for compositions between 0 % and about 75 % magnesium content. The solution series β-Mg 1-x Ni x MoO 4 , isostructural to MgMoO 4 and the high temperature β modification of NiMoO 4 , is thermodynamically stable at ambient conditions for compositions with Ͻ 25 % nickel content. A complete solid solution series β-Mg 1-x Ni x MoO 4 exists at higher temperatures (Ͼ 823 K). The transition temperature for the α Ǟ β transition decreases with increasing magnesium content. The coexist-