Abstract
Environmental Science and Technology
Vol. 29
,
No. 10
,
October 2006
and Their Pollution Assessment
LI Chun
1, 2
, CEN Kuang
3
, WANG Xue
4
(1.China University of Mining and Technology, Beijing100083; 2.Hebei
Environ- geologic Survey Academy, Shijiazhuang 050021; 3.China
University of Geosciences, Beijing 100083; 4.Chinese Academy of Land
and Resource Economics, Beijing 101149)
Abstract ID: 1003- 6504(2006)10- 0064- 03- EA
Abstract: Lead concentration of surface soil taken from 12 typical
parks in urban area of Beijing was studied, and the pollution index was
calculated based on national soil quality criteria to assess the situation of
soil pollution. Results indicated that most of parks were polluted by pb,
with average concentration of pb in soil 30.95mg/kg, ranging from 16.20
to 121.00mg/kg, and pollution index ranging from 0.65 to 2.35. Analysis
indicated that in some parks with longer history and /or near the urban
centre, the concentration and pollution index of pb in the soil were
obviously higher than the average level.
Key words: Beijing; park; soil; pb; pollution index
Envir onment M anagement of Yaer Lake with Potential
Ecological Risk I ndex
ZHU Yan, LI Tao
(Hubei Environment Monitoring Centre, Wuhan 430072)
Abstract ID: 1003- 6504(2006)10- 0067- 02- EA
Abstract: Potential ecological risk index was applied to assessing the
sediments of Yaer Lake, Hubei Province before and after dredging,
which can provide scientific basis for the decision making and
management of environment agencies.
Key words: potential ecological risk index; Yaer Lake; environment
management
Reducing Tur bidity and Chlor ophyll of Bitter n
in Solar Pond
HUANG Li- ping
1
, SUN Wen- ce
2
, ZHAO Ya- zhi
1
,
CHEN Jing- wen
1
, DU Chao
1
(1.School of Environment and Life Science; 2.Department of Power
Engineering, Dalian University of Technology, Dalian 116024)
Abstract ID:1003- 6504(2006)10- 0069- 03- EA
Abstract: Starch modified and polymerised aluminium sulfate (POA), a
newly synthesized flocculant, can reduce turbidity of bitten wastewater
in the solar pond and optimisation of the operation conditions was
investigated. Compared with traditional flocculants such as polymerised
aluminium chloride or polymerised aluminium sulfate, POA can
efficiently remove bittern turbidity and improve the efficiency by 62.2%
and 48.3% respectively. The bittern treated by POA can stably run in the
solar pond within 60 days and the increase of turbidity and chlorophyll
after 60 days operation indicated the growth of some micro- algae.
Key words: bittern; turbidity; flocculant; salinity; chlorophyll
Tr eatment of Coking Wastewater with Fenton-
coagulation and Sedimentation Pr ocess
PENG Xian- yu
1, 2
, YANG Chun- ping
1
, DONG Jun- ying
1, 3
,
CHEN Hong
1
, QU Wei
1
(1.Department of Environment Science and Engineering, Hunan
University, Changsha 410082; 2.Hunan Technical College of
Communication Engineering, Hengyang421001; 3.Changsha University
of Science and Technology, Changsha 410008)
Abstract ID:1003- 6504(2006)10- 0072- 03- EA
Abstract:
An
integrated
process
including
Fenton - oxidation,
coagulation and sedimentation at bench scale was utilized to treat coking
wastewater in order to investigate the best suitable treatment conditions
of coagulation- sedimentation process and Fenton- oxidation process with
ferric chloride and PAM as coagulants. Results showed that the
maximum removal efficiency of COD, color and NH
3
- N for the
integrated process was 92.9%, 84.3% and 96.2% respectively, which can
meet national discharge standards. The performance of the integrated
process is much better than that of the coagulation - sedimentation
process.
Key words: lpre - oxidation; Fenton process; coagulation; coking
wastewater
Pr epar ation of Highly Efficient PTA Degr adation
Bacter ia and Biological Tr eatment of PTA Wastewater
CHEN Jun
(
(Waterworks of Yangtze Petrochemicals, Nanjing 210047)
Abstract ID: 1003- 6504(2006)10- 0075- 03- EA
Abstract : 4 strains of highly efficient degradation bacteria for
terephthalic acid (TA) were isolated and selected. By using inducing
technique, mutation of bacterium DNAs achieved to improve the
degrading capability. By embedding fixation, the optimized bacteria were
applied to purifying terephthalic acid wastewater with highly effective
treatment, whose load was up to 5kg COD/m
3
.d.
Key words: highly efficient PTA degradation bacteria; biological
mutation; embedding fixation; PTA wastewater treatment
Tr eatment of Regener ated Paper making Wastewater
DONG Hai- shan
(
School of Environment Science and Engineering, Southwest Jiaotong
University, Chengdu 610031)
Abstract ID: 1003- 6504(2006)10- 0077- 02- EA
Abstract : Researches and engineering application were introduced for
treatment of regenerated papermaking wastewater with microstraining
and coagulant settling process. Running results showed that removal
efficiency of SS and COD
cr
were above 90% and 85% after the treatment,
which can meet the national discharge criteria. The process is
characterized by simple facilities, stable operation, easy control and cost
effectiveness.
Key words: regenerated papermaking wastewater; microstraining;
coagulant settling
Recycle of Deposed Diatomite fr om Chemical Fiber
Factor y
ZHANG Zhi- jun, LI Ding- long, YIN Wen- ting
(
Department of Environment and Safety Engineering, Jiangsu
Polytechnic University, Changzhou 213016)
Abstract ID: 1003- 6504(2006)10- 0079- 02- EA
Abstract : Diatomite in the treatment of acrylic fibre wastewater was
selected to study the recycling of deposed diatomite. Dynamic leaching
experiment was conducted to evaluate the desorption rule and effect of
Na
+
, Al
3+
, Fe
2+
, Zn
2+
, Ca
2+
and Mg
2+
absorbed deposed diatomite while
SO
4
2 -
was evaluated by static soaking experiment. Results showed that
efficient recovery of diatomite absorption was obtained by dynamic l
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