CV6504
Hazardous Waste Treatment and Recovery
Homework 3
Plating waste stream containing 0.1% (w/w) dissolved nickel. The flow rate of waste stream is
3
80 m /d. Nickel is removed from a plating waste
CV6504
Hazardous Waste Treatment and Recovery
Homework 2
1.
You are working as a consultant to help a Chemical Company to determine the waste
sludge containing heavy metals. Sketch a diagram to illust
CV6504
Hazardous Waste Treatment and Recovery
Homework 4
Plating waste stream containing 0.05% (w/w) dissolved nickel and 2.5 % (wt) of suspended
solid. The flow rate of waste stream is 20 tonnes per
CV6504
Hazardous Waste Treatment and Recovery
Exercise only
1.
Calculate the empirical formulae of the following compounds from their percentage
composition by weight:
1.
2.
3.
4.
K, 56.5%; C, 8.70%;
42
PART 1 Completely Mixed Systems
EXAMPLE 2.5. EVALUATION OF TEMPERATURE DEPENDENCY OF RE-
ACTIONS. A laboratory provides you with the following results for a reaction:
4°C
16°C
k1 = 0.12 ct"1
k2 = 0
LECTURE 4 Particular Solutions 83
BOX 4.2. Donald O'Connor and Closed-Form Solutions
You may be wondering why in this age of computers Ive devoted this lecture (and
several other parts of this book) t
62 PART I Completely Mixed Systems
As in Example 3.4 there is a certain amount of subjectivity involved in deciding
how much of the recovery is judged as being enough. In general Irecommend using
eith
LECTURE 6 reeooacr: bysrerns OI Keacrors 11 I
PROBLEMS
6.1. Three matrices are dened as
2 6
[x]: 3 10] owl? [Z]=[:
7 4
6.2.
6.3.
6.4.
Perform all possible multiplications that can be computed betwe
LECTURE 5 Feedforward Systems of Reactors 99
to omitting B from the analysis. The graph shows that results for C are quite close
for the two cases, indicating that for all intents and purposes we woul
NANYANG TECHNOLOGICAL UNIVERSITY
SCHOOL OF CIVIL AND ENVIRONMENTAL ENGINEERING
CV6602 URBAN HYDROLOGY
TUTORIAL QUESTIONS ON
BASIC METEROLOGY & RAINFALL
1.
Anemometers at 5 and 60 m on a tower record w
NANYANG TECHNOLOGICAL UNIVERSITY
SCHOOL OF CIVIL AND ENVIRONMENTAL ENGINEERING
CV6602 URBAN HYDROLOGY
TUTORIAL QUESTIONS ON
HYDROGRAPH ANALYSIS AND RAINFALL ABSTRACTIONS
1.
Plot the following flow dat
NANYANG TECHNOLOGICAL UNIVERSITY
SCHOOL OF CIVIL AND ENVIRONMENTAL ENGINEERING
CV6602 URBAN HYDROLOGY
TUTORIAL QUESTIONS ON URBAN DRAINAGE
1.
An area of 8 ha has an overland flow length of 50 m and an
NANYANG TECHNOLOGICAL UNIVERSITY
SCHOOL OF CIVIL AND ENVIRONMENTAL ENGINEERING
CV6602 URBAN HYDROLOGY
TUTORIAL QUESTIONS ON CHANNEL ROUTING
1.
Given the hydrographs tabulated below (cubic meters per s
NANYANG TECHNOLOGICAL UNIVERSITY
SCHOOL OF CIVIL AND ENVIRONMENTAL ENGINEERING
CV6602 URBAN HYDROLOGY
TUTORIAL QUESTIONS ON HYDROGRAPH SYNTHESIS
Given below are the observed flows in m3/s from a storm
NANYANG TECHNOLOGICAL UNIVERSITY
SCHOOL OF CIVIL AND ENVIRONMENTAL ENGINEERING
CV6602 URBAN HYDROLOGY
TUTORIAL QUESTIONS ON
FLOOD FREQUENCY ANALYSIS
1.
The maximum discharges as recorded at a river ga
ENCE 215 Practice Water Chemistry Problems:
5. The following ions are present in solution. What is the concentration of Cl-?
Ion
Na+
C lMg+2
SO4-2
Ca+2
K+
g/L
10.8
?
1.3
2.7
0.8
0.4
M
0.47
?
0.0535
0.
ENCE 215 Practice Water Chemistry Problems:
1. What is the pH of a pure 0.05 M HOCl solution? (HOCl is a weak electrolyte with Ka
= 10-7.5.)
Answer: 4.4 V
2. A solution contains 0.1 M total free chlor
ENCE 215 Practice Redox Problems:
1. Assign oxidation numbers to each element in the following compounds:
a. H2CO3
b. N2
c. Zn(OH)4-2
2. Identify the species being oxidized and those being reduced, an
ENCE 215 Practice Redox Problem Solutions:
1. Assign oxidation numbers to each element in the following compounds:
a. H2CO3
H: +1, C: +4, O: -2
b. N2
N: 0
c. Zn(OH)4-2
Zn: +2, O: -2, H: +1
2. Identify
ENCE 215 Practice Cell Potential Problems:
1. In an electrochemical cell with zinc, the net chemical reaction is:
Zn(s) + 2 H+ Zn+2 + H2(g)
At, 25oC, what is the cell potential?
H2(g) has a partial pr
ENCE 215 Practice Cell Potential Problems:
3. What is the minimum voltage needed to split salt water? The reaction of salt water
splitting is:
Cl-(aq) + H2O(l) OH- + 0.5 H2(g) + 0.5 Cl2
Experimental c
ENCE 215 Practice Cell Potential Problems:
1. In an electrochemical cell with zinc, the net chemical reaction is:
Zn(s) + 2 H+ Zn+2 + H2(g)
At, 25oC, what is the cell potential?
H2(g) has a partial pr
ENCE 215 Practice Cell Potential Problems:
3. What is the minimum voltage needed to split salt water? The reaction of salt water
splitting is:
Cl-(aq) + H2O(l) OH- + 0.5 H2(g) + 0.5 Cl2
Experimental c
ENCE 215 Practice Water Purification Problems:
1. 500 L of wastewater at 25oC has the following concentrations:
60 mg/L of NaCl and 2 g-COD/m3
a) What is the minimum energy requirement to remove the s
ENCE 215 Practice Heat Transfer Problems:
1. A rectangular house, LxWxH = 20 m x 10 m x 3 m, has 1 2m x 5m window in each of
the 4 walls. The heat resistances (i.e. insulating ability) of the walls, r
ENCE 215 Practice Fuels & Thermodynamics Problems:
1. a) How many pounds of coal are required to make electricity for an electric car to
travel 100 miles if 1 pound of coal contains 5000 kJ and the ca
ENCE 215 Practice Hydro Power Problem:
1. What is the energy efficiency of a dam (LxWxH = 1000 ft x 900 ft x 200 ft) that
produces 1.5 x 1012 J of energy?
Answer: 50 %
Nuclear Energy Practice Problems
ENCE 215 Practice Population Growth Problems:
1. The initial population of a region with unrestricted growth is 2.5 million. What is the
population in 50 years if the doubling time is 45 years?
Answer