Removal of heavy metals from wastewater using agricultural and industrial wastes as adsorbents

Ngày tải lên: 23/09/2012, 14:47

... that the behavior of TP differs from that of TOC and TN in the equipment. The CVs in heavy metals were larger than those of TOC, TN and TP. Especially, the CV of Fe changed from 0.73 at IN ... the removal properties based on major factors such as initial concentration of water quality item at IN, chemical property for charcoal and heavy metals in soil an...

Ngày tải lên: 05/09/2013, 09:38

... Health of Vietnam 2 Classification of medical wastes 2 Situation of medical wastes in Vietnam 3 From solid wastes 3 To liquid wastes 4 Financial difficulties 5 Solution of medical wastes ... Liquid medical wastes can be treated much more easily by using one of the latest technologies – Biofast – a kind of machine for filtering liquid wastes. Biofast are out...

Ngày tải lên: 23/09/2012, 15:38

... concentration of Fe 0 nanoparticles had effect on the reduction of Cr(VI). When the mass ratio of Fe 0 to Cr(VI) was 50:1, 100% removal efficency was achieved. pH has important effect on Cr(VI) removal ... concentration of 5mg/l. When treatment time increased then Cr(VI) removal efficiency decreased. The proper mass ratio of Fe nanoparticles to Cr(VI) was about 50:1....

Ngày tải lên: 14/03/2014, 10:20

... depend on land use, and are lower for public and private green areas and residential sites (‘‘A’’ limits) and higher for industrial areas (‘‘B’’ limits). At site A, the levels of Cd, Cu, Pb and Zn ... the site of collection, except B20, which was classified as ‘‘A’’ type, and B21, which was assigned to the correct class but with 74.5% probability. The two pieces of materi...

Ngày tải lên: 15/03/2014, 23:56

... acidification effected release of Ni, Cu, and Cd from F 5 (residual fraction), of Ni and Zn from F 3 fraction, of Zn from F 4 and F 2 fractions from sludge. The released and added metals were incorporated ... case of Zn and Pb, into F 4 (reducible or Fe–Al oxide bound) fraction in case of Ni, Cu, and Cd, into F 4 fraction in case of Pb, Cu, and Cd, into F 2...

Ngày tải lên: 16/03/2014, 00:07

... automatic detection and removal. The detection algorithm has a high precision in terms of number of detected true scratches and reduced number of false alarms. The quality of the restored images is satisfying from ... length of the low pass filter associated to the employed wavelets basis and m is the estimated scratch width. Let {A J , {V j } 1≤j≤J } respectively be the low...

Ngày tải lên: 22/06/2014, 01:20

... Introduction Contamination of water by toxic heavy metals through the dis- charge of industrial wastewater is a worldwide environmental prob- lem. Rapid industrialization has seriously contributed to the release of ... HCrO 4 − through cell membranes and o xidize biological molecules [1].Awide range of physical and chemical processes are available for the removal of ch...

Ngày tải lên: 02/07/2014, 14:14

... the b-propeller and b-sandwich domains involve contacts of IV and V blades and b-strands (1–6) from the internal b-sheet of the b-sand- wich domain. The last four amino acids of the native sequence ... the basis of amino acid sequence similarity, the protein from B. longum KN29.1 has been classified to family 32 of the glycoside hydrolases as b-fructofura- nosidase [47,48...

Ngày tải lên: 06/03/2014, 00:21

... for comparison. The effect of pH on the activity of the different CGTase preparations from A11 and BM was Table 1. Degree of derivatization of the CGTases from A11 and BM obtained with different ... the yield of CD 8 increased four-fold with the CLIP CGTase from A11, and three-fold with the CLIP CGTase from BM, after 24 h of reaction. The amount of CD 8 produced by...

Ngày tải lên: 07/03/2014, 10:20