A metropolitan city such as Los Angeles (LA) is an ideal study site with a very high population density, and it houses at least 3 treatment plants where sewage is treated preliminarily and then progressing to tertiary...A metropolitan city such as Los Angeles (LA) is an ideal study site with a very high population density, and it houses at least 3 treatment plants where sewage is treated preliminarily and then progressing to tertiary treatment before discharging into the LA River. We will gain a better understanding of the water quality in the LA River and the nitrate load in the watershed system by examining the influence of waste water treatment plants (WWTPs). The goal of this study is to pinpoint the exact source of nitrate in the LA River using the isotope signatures. We have selected sampling locations both upstream and downstream of the WWTP. This serves to monitor nitrate levels, aiding in the assessment of treatment plant effectiveness, pinpointing nitrate pollution sources, and ensuring compliance with environmental regulations. The research explores the isotopic composition of NO3 in relation to atmospheric nitrogen and Vienna Standard Mean Ocean Water, shedding light on the contributions from various sources such as manure, sewage, soil organic nitrogen, and nitrogen fertilizers. Specifically, there is a change in the δ15NAir value between the dry and wet seasons. The isotope values in the Tillman WWTP sample changed between dry and wet seasons. Notably, the presence of nitrate originating from manure and sewage is consistent across seasons, emphasizing the significant impact of anthropogenic and agricultural activities on water quality. This investigation contributes to the broader understanding of nitrogen cycling in urban water bodies, particularly in the context of wastewater effluent discharge. The findings hold implications for water quality management and highlight the need for targeted interventions to mitigate the impact of nitrogen-containing compounds on aquatic ecosystems. Overall, the study provides a valuable framework for future research and environmental stewardship efforts aimed at preserving the health and sustainability of urban water resources. This data informs decisions regarding additional treatment or mitigation actions to safeguard downstream water quality and ecosystem health.展开更多
There thought to be a great weakness in the construction of Angel in Tess for Angel's illogically changeable character.The author holds,however,that Angel's character is reasonable as he is a man in the Victor...There thought to be a great weakness in the construction of Angel in Tess for Angel's illogically changeable character.The author holds,however,that Angel's character is reasonable as he is a man in the Victorian Age.This article tries to interpret the male subject deconstruction with post-modern theory to demonstrate the concern to the female in Hardy's work.展开更多
On May 17, the series events of China Tourism and Culture Week hosted by the China Tourism Office in Los Angeles officially kicked off in Los Angeles. A number of culture and tourism promotion activities, including op...On May 17, the series events of China Tourism and Culture Week hosted by the China Tourism Office in Los Angeles officially kicked off in Los Angeles. A number of culture and tourism promotion activities, including opening ceremony, photo exhibition, handicraft exhibition of intangible cultural heritage, gourmet experience, tourism promotion, advertising and so on, have been held one after another.展开更多
On October 28, CES opened Shanghai-Harbin-Los Angelesairline, and the initial flight ceremony was held at Taiping InternationalAirport in Harbin. It was the first flight from Harbin to USA. Leaders ofHeilongjiang Prov...On October 28, CES opened Shanghai-Harbin-Los Angelesairline, and the initial flight ceremony was held at Taiping InternationalAirport in Harbin. It was the first flight from Harbin to USA. Leaders ofHeilongjiang Province, Harbin City and China Eastern Air HoldingCompany presented themselves on the initial flight ceremony.展开更多
The central bank of China has raised her deposit rate for 6 times,and deposit reserve rate for 16 times,since last year up to now,which resulted to a great suffer to those small and medium sized enterprises in finance...The central bank of China has raised her deposit rate for 6 times,and deposit reserve rate for 16 times,since last year up to now,which resulted to a great suffer to those small and medium sized enterprises in finance collection.30 percent of China s small and medium sized enterprises have to be closed down, and 60 percent of them are because of finance problem.How to gather the fund is the biggest obstacle for China's enterprises to grow.展开更多
The Angel brand vitality swayer is made by the Zhuhai Gongbei Co. Ltd. It can strengthen the spinal nerve through goldfish type swaying movements. Medical science has proven that insufficient oxygen produces bad
文摘A metropolitan city such as Los Angeles (LA) is an ideal study site with a very high population density, and it houses at least 3 treatment plants where sewage is treated preliminarily and then progressing to tertiary treatment before discharging into the LA River. We will gain a better understanding of the water quality in the LA River and the nitrate load in the watershed system by examining the influence of waste water treatment plants (WWTPs). The goal of this study is to pinpoint the exact source of nitrate in the LA River using the isotope signatures. We have selected sampling locations both upstream and downstream of the WWTP. This serves to monitor nitrate levels, aiding in the assessment of treatment plant effectiveness, pinpointing nitrate pollution sources, and ensuring compliance with environmental regulations. The research explores the isotopic composition of NO3 in relation to atmospheric nitrogen and Vienna Standard Mean Ocean Water, shedding light on the contributions from various sources such as manure, sewage, soil organic nitrogen, and nitrogen fertilizers. Specifically, there is a change in the δ15NAir value between the dry and wet seasons. The isotope values in the Tillman WWTP sample changed between dry and wet seasons. Notably, the presence of nitrate originating from manure and sewage is consistent across seasons, emphasizing the significant impact of anthropogenic and agricultural activities on water quality. This investigation contributes to the broader understanding of nitrogen cycling in urban water bodies, particularly in the context of wastewater effluent discharge. The findings hold implications for water quality management and highlight the need for targeted interventions to mitigate the impact of nitrogen-containing compounds on aquatic ecosystems. Overall, the study provides a valuable framework for future research and environmental stewardship efforts aimed at preserving the health and sustainability of urban water resources. This data informs decisions regarding additional treatment or mitigation actions to safeguard downstream water quality and ecosystem health.
文摘There thought to be a great weakness in the construction of Angel in Tess for Angel's illogically changeable character.The author holds,however,that Angel's character is reasonable as he is a man in the Victorian Age.This article tries to interpret the male subject deconstruction with post-modern theory to demonstrate the concern to the female in Hardy's work.
文摘On May 17, the series events of China Tourism and Culture Week hosted by the China Tourism Office in Los Angeles officially kicked off in Los Angeles. A number of culture and tourism promotion activities, including opening ceremony, photo exhibition, handicraft exhibition of intangible cultural heritage, gourmet experience, tourism promotion, advertising and so on, have been held one after another.
文摘On October 28, CES opened Shanghai-Harbin-Los Angelesairline, and the initial flight ceremony was held at Taiping InternationalAirport in Harbin. It was the first flight from Harbin to USA. Leaders ofHeilongjiang Province, Harbin City and China Eastern Air HoldingCompany presented themselves on the initial flight ceremony.
文摘The central bank of China has raised her deposit rate for 6 times,and deposit reserve rate for 16 times,since last year up to now,which resulted to a great suffer to those small and medium sized enterprises in finance collection.30 percent of China s small and medium sized enterprises have to be closed down, and 60 percent of them are because of finance problem.How to gather the fund is the biggest obstacle for China's enterprises to grow.
文摘The Angel brand vitality swayer is made by the Zhuhai Gongbei Co. Ltd. It can strengthen the spinal nerve through goldfish type swaying movements. Medical science has proven that insufficient oxygen produces bad
