cu zn pb and cr of urban soils in nanjing china

... main source of Pb contamination in urban soils The concentrations of Cu, Zn, Pb and Cr in non -urban soils are much lower than those in urban soils, and are not polluted by Cu, Zn, Pb and Cr Anthropogentic ... objective of this study was to determine the total Cu, Zn, Pb and Cr concentrations and chemical speciation of urban soils in Nanjing, China Materials and methods 2.1 Description of study area Nanjing ... increased with the increase of clay content (Xu and Yang, 1995; Liu, 1996) Lu (2000) reported that Cu, Zn, Pb and Cr in Nanjing urban soils were mainly originated from anthropogentic input, and...

Ngày tải lên: 15/03/2014, 23:22

... of living, which includes a minimum of cultural education and economic security Honneth’s theory, based on the intersubjectivity of individuals, sets the backdrop for understanding coping as ... even anything - they accused us of blocking the road but we didn’t (female, 38) Discussion This study was framed by our interest in the resilience of urban refugees - a group increasing in number, ... Conclusions In this paper, we have sought to emphasise the importance of recognition in understanding and promoting coping and resilience amongst urban refugees To so, we focused on urban refugees in...

Ngày tải lên: 13/08/2014, 15:21

... đánh giá mức độ ô nhiễm Cu, Zn, Pb đất nghiên cứu Xác định h m lợng dễ tiêu Cu, Zn, Pb đất nghiên cứu Xác định mối quan hệ h m lợng tổng số v di động kim loại Cu, Zn, Pb với tỉ lệ sét, pHKCl, ... định h m lợng Cu, Zn, Pb dễ tiêu: phơng pháp HCl pha lo ng (HCl 0,1 M) Sử dụng máy quang phổ hấp thụ nguyên tử để định lợng Cu, Zn, Pb dịch chiết - Xác định th nh phần Cu, Zn, Pb đất: phơng pháp ... HF, HClO4 v HNO3 Định lợng Cu, Zn, Pb dịch chiết máy quang phổ hấp thụ nguyên tử 3.2.3 Đánh giá mức độ ô nhiễm Cu, Zn, Pb đất nghiên cứu cách so sánh h m lợng Cu, Zn, Pb tổng số đất với tiêu chuẩn...

Ngày tải lên: 02/08/2013, 16:20

... 4.2 H m lợng Cu, Zn, Pb tổng số thân thực vật 40 lấy vùng đất bị ô nhiễm 40 4.3 Khả hấp thụ Cu, Zn, Pb Đơn Buốt 47 4.4 Khả hấp thụ Cu, Zn, Pb Dừa Nớc 48 4.5 Khả hấp thụ Cu, Zn, Pb Mơng Đứng 49 ... 4.6 Khả hấp thụ Cu, Zn, Pb Rau Muống 50 4.7 Khối lợng Cu, Zn, Pb tích lũy v giảm đất 52 sau 90 ng y thí nghiệm 52 4.8 Khả hấp thụ Cu, Zn, Pb Đơn Buốt 53 4.9 Khả hấp thụ Cu, Zn, Pb Đơn Buốt 55 ... 4.10 Khả hấp thụ Cu, Zn, Pb Dừa Nớc 56 4.11 Khả hấp thụ Cu, Zn Pb Dừa Nớc 58 Tr ng i h c Nụng nghi p H N i - Lu n Th c s khoa h c nụng nghi p - vi 4.12 Khả hút Cu, Zn, Pb Mơng Đứng...

Ngày tải lên: 08/08/2013, 22:33

... Cu, Pb, Zn ñ t 2.3.1 Nghiên c u ñ c tính c a Cu, Pb, Zn ñ t ð c tính c a nguyên t ñ ng (Cu) ð ng kim lo i thu c nhóm 1B b ng tu n hoàn nguyên t hoá h c, có th g p ñ ng dư i m c oxi hoá (Cu, Cu+ , ... KLN Cu, Pb, Zn so v i t ng s c a CT4 4.10 53 Xu hư ng tăng hàm lư ng Cu, Zn, Pb d tiêu ñ t ô nhi m KLN ng p nư c nh hư ng c a ch ph m vi sinh v t 4.9 51 T l ph n trăm hàm lư ng d tiêu c a KLN Cu, ... c >5mM, n m r có kh h p th >1 mg Pb/ g glomalin, >0,5 mg Cu/ g glomalin, >3 mg Zn/ g glomalin Có 14 ch ng vi sinh v t có kh h p thu Cu, Pb, Zn cao v i lư ng h p thu ñ t t 81,46 mg ñ n 657,48 mg chì,...

Ngày tải lên: 20/11/2013, 17:54

... sources of air pollutants are often diffuse In this context, the role of urban green space and in particular that of the urban forest in removing air pollutants in urban areas has become of interest ... existing housing areas has resulted in an increasing demand for land within city limits and demands to build on land allocated to green spaces This means decreasing amount of green spaces within the ... gender and ethnic background (German-Chiari and Seeland 2004) Due to an increase in the multicultural set-up of urban populations in the wake of European political integration and the influx of non-European...

Ngày tải lên: 07/03/2014, 12:20

... by using wastewater and river water for irrigation (kg ha-1) Two horizontal lines show the nutrition demand for N, P, K of rice and maize H and L indicated the demand supplying of water being ... chromium (Cr) , Cu, mercury (Hg), Pb, Zn, etc [12] The present study found that a cubic meter of wastewater contained about 1.09-2.14 mg Cd; 0.16-0.33 g Cu; 2.75-4.02 mg Pb, 0.200.34 g Zn and 0.22-0.44 ... sediments of waterways in association with organic and inorganic matter in the sediments [8] In the present study, we examined the nutritive value and potential risk of using wastewater of Hanoi...

Ngày tải lên: 22/03/2014, 12:20

... details Key Laboratory of Universal Wireless Communications, Ministry of Education, Beijing University of Posts and Telecommunications, P.O Box 92, Beijing 100876, China 2China Mobile Communications ... number of paths of which the jn = θ, and the Pn, θ is the power of the corresponding path 4.2 Data analysis and angular offset modeling Figure depicts a spatial sample of the SAGE results The points ... colors stand for distinct paths extracted in one cycle in polar coordinate system, with total of 50 paths The angles of those points are the jn from SAGE results Besides, the radius of each point...

Ngày tải lên: 20/06/2014, 21:20

... weights of 10, 15 and 20 kg and with three exchangeable base plates of 100, 200 and 300 mm in diameter The next type of PFWD was Loadman, which was developed by Al-Engineering Oy in Finland This ... Measurement of soil stress and strain using in- ground instrumentation In: Proceedings of the ASCE Geoinstitute GeoDenver Conference, Denver: 10 Pidwerbesky B (1997): Evaluation of non-destructive in situ ... compaction of forest soils increases the bulk soil density and if it exceeds the boundary of 1.8 g.cm–3, the penetration of roots ceases to occur (Demko 1994), which is in accordance with the finding...

Ngày tải lên: 07/08/2014, 10:21

... new customer introduced through Word of Mouth; (3) Profit from marketing and advertising cost reducing; (4) Profit from increasing product using/purchasing number and frequency That’s why in recent ... Collecting statistical and analytical data; (2) Analyzing and collecting theories; (3) Classifying and systematizing theories; (4) Modelling; (5) Scientific thinking in interpretation and inductive ... analyzing, comparing and evaluating some studies on the impact of satisfaction on loyalty and repurchase behavior under the impact of moderating variables of involvement and fashion style of customers...

Ngày tải lên: 30/10/2014, 11:17

Ngày tải lên: 13/11/2014, 09:53

... tackled keeping in mind the effect of the other Urban development has led to an increase in impervious land area which in turn has led to an increase in volume of surface runoff and decreased infiltration ... Switzerland, the phenol spills in St Gallen and Zurich drinking water supplies led officials to introduce a GAC filtration system in all of the water works in critical areas and in the United Kingdom ... component of life and in order to sustain life a satisfactory (adequate, safe and accessible) supply of drinking water must be available to all Drinking water is a dwindling source these days, and...

Ngày tải lên: 03/10/2015, 20:31

... accounting for 71% of the area in mainland China) , and includes eleven provinces and one municipality, but the population is relatively sparse (360 million, accounting for only 28% of the total China ... summary, our results indicate that an increase in studying intensities could lead to increases in myopia and astigmatism occurrences, but it is not clear whether the occurrence increases were caused ... National Bureau of Statistics of China China statistical yearbook 2003 [in Chinese] Beijing: China Statistics Press 2003: 100-102 19 Chongqing Municipal Bureau of Statistics Chongqing statistical...

Ngày tải lên: 25/10/2012, 11:40

... ven bi^n t ınh Tra Vinh _ _ (Final report in 1999 and developing plans in 2000 of aquaculture in marsh areas of coastal zone in Tra Vinh province) Department of Fishery, Tra Vinh 20 pp unpublished ... Tra Vinh nm 2001 va phuo’ng hu’ng nhi^m vu nm 2002 _(Final _ _ report in 2001 and developing plans in 2002 of aquaculture in marsh areas of coastal zone in Tra Vinh province) Department of Fishery, ... mangrove distribution in Tra Vinh indicate significant changes in mangrove forest coverage in Tra Vinh (Fig and Tables and 3) In 1965 rice paddy was the most use of land in Tra Vinh The mangrove forests...

Ngày tải lên: 14/08/2013, 14:15

... the beginning of leaching, decreased after a peak, and then increased and decreased again This behavior indicates that the initial leaching is like Na+ leaching, and the surplus Ca2+ is drained ... other hand, in northeastern China, the amount of salt-affected soil is increasing due to increases in the evaporation rate and excessive cultivation In order to solve these air pollution and soil ... runoff rate of salts The four-electrode sensor consisted of four stainless steel rods inserted in parallel into an acrylic column with an inner diameter of 50 mm, outer diameter of 60 mm, and...

Ngày tải lên: 05/09/2013, 09:38

... discrete time interval is described at the midpoint of the interval, called the sample point Since both the information of time (x-axis) and flow rate (y-axis) is needed to describe a certain injection ... Bezier curve An example of cubic Bezier curve, using four control points defined as P1, P2, P3, and P4, is illustrated in Figure Figure Schematic of a cubic (3rd order) Bezier curve The CO2 injection ... in computer graphics and related fields It is defined by a set of control points, and uses them as coefficients of a certain polynomial to describe continuous curves [13] The control points of...

Ngày tải lên: 05/09/2013, 16:10

... contribution of other factors involved in speaking 1.3 Cultural factors in the teaching and learning of speaking skills in classrooms 1.3.1 What cultural factors influence on the teaching and the learning ... of thinking, feeling, and acting, and fixed patterns for doing certain things According to Thompson (1990:132), “the pattern meaning embodied in symbolic forms, including actions, utterance and ... attitudes of the teachers and students at -3- NTT towards the position of culture and speaking skills in ELT and towards cultural factors in developing speaking skills Also, the current teaching and...

Ngày tải lên: 07/09/2013, 13:00

... inspect and maintain an inventory of all bridges on the Federal-aid system Inspection standards were issued in 1971 to satisfy this mandate of Congress Most states completed their inventory of ... located in all states plus Washington, DC, and Puerto Rico The format of this report parallels that of Reference The main purpose for creating and maintaining the NBI is to monitor the condition of ... Material and structure type for main span and approach spans, if any • Condition and appraisal ratings of structure • Traffic data Material Usage and Condition of Existing Bridges in the U.S The coding...

Ngày tải lên: 20/12/2013, 20:15

... working this, who is he involving?) In customer teams, roles of CBD people in consumer and customer and centre of expertise teams and to a lesser extent role of marketing people in consumer and customer ... JEM ??) and include input/feedback of people Step : Create a coaching culture where you grow and learn, work is appreciated, you are credited and valued This needs to start from the top and be ... Have a training programme This is often why people joined P&G in the first place and this is currently perceived as missing Have a plan for each team and each function focused towards building capability...

Ngày tải lên: 25/01/2014, 00:20