Arsenic removal by ferric-chloride coagulation – effect of phosphate, bicarbonate and silicate

2011 ◽  
Vol 64 (5) ◽  
pp. 1046-1055 ◽  
Author(s):  
Dóra Laky ◽  
István Licskó
Keyword(s):  
Adverse Effect ◽  
Arsenic Removal ◽  
Linear Regression Analysis ◽  
Arsenic Concentration ◽  
Ferric Hydroxide ◽  
Multiple Linear Regression Analysis ◽  
Ph Values ◽  
Robust Model ◽  
Coagulant Dosage ◽  
Negative Effect

Jar tests with synthetic water were carried out in order to investigate the effect of phosphate, bicarbonate and silicate on arsenic removal efficiency by in-situ formed ferric hydroxide. Above 12 mg C/L inorganic carbon concentration, the adverse effect of bicarbonate was definite, and resulted in higher remaining arsenic concentration. At all pH values (7.5–7.8) and coagulant dosages (0.84–3.00 mg/L Fe) tested, the negative effect of phosphate on arsenic removal was also evident. In the presence of silicate small ferric-hydroxide colloids were formed, which were able to go through the 0.45 μm pore-size membrane. Compared to silicate-free systems, 2.5–3.5 times higher coagulant dose was needed to achieve the target arsenic concentration in the presence of 14–23 mg/L Si. At higher pH values the adverse effect of silicate was even more significant. All data were merged and multiple linear regression analysis was carried out in order to build up a robust model to predict the residual arsenic concentration if the raw water contains 50–60 μg/L initial arsenic concentration. The estimation was based on the following variables: PO4-P concentration, final pH, Si concentration, Fe(III) dose. The most important influencing factors proved to be the silicate concentration and applied coagulant dosage.

PENGARUH FAKTOR-FAKTOR INTERNAL PERBANKAN TERHADAP NON PERFORMING FINANCING PADA BANK UMUM SYARIAH

2019 ◽  
Vol 6 (2) ◽  
pp. 115-130
Author(s):  
Eka Ambara Harci Putranta ◽  
Lilik Ambarwati
Keyword(s):  
Linear Regression ◽  
Multiple Linear Regression ◽  
Linear Regression Analysis ◽  
Multiple Linear Regression Analysis ◽  
Capital Adequacy ◽  
Annual Reports ◽  
Regression Methods ◽  
Capital Adequacy Ratio ◽  
Negative Effect ◽  
Independent Variable

The study aims to analyze the influence of internal banking factors in the form of: Capital Adequency Ratio (CAR), Financing to Deposit Ratio (FDR) and Total Assets (TA) to Non Performing Financing at Sharia Banks. This research method used multiple linear regression analysis with the help of SPSS 16.00 software which is used to see the influence between the independent variables in the form of Capital Adequacy Ratio (CAR), Financing to Deposit Ratio (FDR) and Total Assets (TA) to Non Performing Financing. The sample of this study was 3 Islamic Commercial Banks, so there were 36 annual reports obtained through purposive sampling, then analyzed using multiple linear regression methods. The results showed that based on the F Test, the independent variable had an effect on the NPF, indicated by the F value of 17,016 and significance of 0,000, overall the independent variable was able to explain the effect of 69.60%. While based on the partial t test, showed that CAR has a significant negative effect, Total assets have a significant positive effect with a significance value below 0.05 (5%). Meanwhile FDR does not affect NPF.

Pengaruh Tipe Industri, ROE, ROA Dan Kinerja Lingkungan Terhadap Pengungkapan Islamic Social Reporting

SKETSA BISNIS ◽  
2019 ◽  
Vol 6 (1) ◽  
pp. 1-12
Author(s):  
Nuraeni ◽  
Anik Mauilah
Keyword(s):  
Statistical Analysis ◽  
Environmental Performance ◽  
Linear Regression Analysis ◽  
Sampling Technique ◽  
Total Sample ◽  
Multiple Linear Regression Analysis ◽  
Social Reporting ◽  
Annual Reports ◽  
Purposive Sampling ◽  
Negative Effect

English This study aims to determine the effect of few variables, that is industiral type, profitability proxied by ROE and ROA, and environmental performance towards Islamic social reporting disclosure in companies listed in JII 2011-2015. The population in this study were all companies registered in JII 2011-2015, the sampling technique using purposive sampling, so that a total sample of 11 companies was obtained for five years, or equal to 55 annual reports. The analysis in this study is a descriptive statistical analysis by conducting a classic assumption test. The multiple linear regression analysis in this study uses SPSS 17 statistical analysis tools. The results of this study indicate that the Industry Type and Environmental Performance variables have no significant effect on Islamic Social Reporting Disclosure, while ROE has a significant negative effect and ROA has a significant positive effect on Islamic Social Reporting Disclosure. Keywords: Industrial Type, ROE, ROA, Environmental Performance, Islamic Social Reporting Disclosure. Indonesia Penelitian ini bertujuan untuk mengetahui pengaruh variabel tipe industri, profitabilitas yang diproksikan dengan ROE dan ROA, serta kinerja lingkungan terhadap pengungkapan islamic social reporting pada perusahaan yang terdaftar di JII Periode 2011-2015. Populasi dalam penelitian ini adalah seluruh perusahaan yang terdaftar di JII periode 2011-2015, teknik pengambilan sampel dengan menggunakan purposive sampling, sehingga diperoleh total sampel sebanyak 11 perusahaan selama lima tahun, atau sama dengan 55 laporan tahunan. Analisis dalam penelitian ini merupakan analisis statistik deskriptif dengan melakukan uji asumsi klasik. Adapun analisis regresi linier berganda dalam penelitian ini menggunakan alat analisis statistik SPSS 17. Hasil penelitian ini menunjukkan bahwa variabel Tipe Industri dan Kinerja Lingkungan berpengaruh tidak signifikan terhadap Pengungkapan Islamic Social Reporting, sedangkan ROE berpengruh negatif signifikan dan ROA berpengaruh positif signifikan terhadap Pengungkapan Islamic Social Reporting.

scholarly journals Pengaruh Sistem Pengendalian Intern Pemerintah dan Moralitas Individu pada Kesalahan Akuntansi

2018 ◽  
pp. 1170
Author(s):  
I Gusti Agung Gde Dennyningrat ◽  
I D.G. Dharma Suputra
Keyword(s):  
Control System ◽  
Internal Control ◽  
Linear Regression Analysis ◽  
Sampling Technique ◽  
Multiple Linear Regression Analysis ◽  
Internal Control System ◽  
Negative Effect ◽  
The Government ◽  
Questionnaire Method ◽  
Accounting Errors

Accounting mistakes are a mistake in financial facts. In order for an agency or company does not occur accounting errors, agencies or companies need to consider the factors that affect accounting errors. The purpose of this study is to provide empirical evidence of the effect of Government Internal Control System and individual morality on accounting errors. This research was conducted at Local Government of Badung Regency. Population in this research is all financial officer at Badung Regency Government. The number of samples taken as many as 35 employees, with purposive sampling technique. The data were collected by questionnaire method. Data analysis technique used is multiple linear regression analysis. Based on the results of the analysis, it is known that the Government Internal Control System and individual morality have a negative effect on accounting errors in Badung District Government.

Pengaruh Rasio Keuangan terhadap Profitabilitas pada Perusahaan

2021 ◽  
Vol 1 (1) ◽  
pp. 21-29
Author(s):  
Amalia Amanda Hidayah ◽  
Eti Kurniati ◽  
Farid H. Badruzzaman
Keyword(s):  
Linear Regression Analysis ◽  
Multiple Linear Regression Analysis ◽  
Capital Adequacy ◽  
Analysis Techniques ◽  
Operational Costs ◽  
Net Interest Margin ◽  
Capital Adequacy Ratio ◽  
Negative Effect ◽  
Positive Effect ◽  
Interest Margin

Abstract. This study used a sample of 6 companies. The research objective was to determine the effect of Non Performing Loans (NPL), Operational Costs on Operational Income (OCOI), Net Interest Margin (NIM), Loan to Deposits Ratio ( LDR) and Capital Adequacy Ratio (CAR) to profitability (ROA). Problem solving using multiple linear regression analysis techniques. Based on the analysis, it is known that NPL and LDR have a significant negative effect on profitability (ROA), while CAR have a significant positive effect on profitability (ROA). Abstrak. Penelitian ini menggunakan sampel sebanyak 6 perusahaan. Tujuan penelitian untuk mengetahui pengaruh Non Performing Loan (NPL), Biaya Operasional terhadap Pendapatan Operasional (BOPO), Net Interest Margin (NIM), Loan to Deposits Ratio (LDR) dan Capital Adequacy Ratio (CAR) terhadap profitabilitas (ROA). Pemecahan masalah menggunakan teknik analisis regresi linier berganda. Berdasarkan hasil analisis maka diketahui bahwa NPL dan LDR berpengaruh negatif signifikan terhadap profitabilitas (ROA), sedangkan CAR berpengaruh positif signifikan terhadap profitabilitas (ROA).

scholarly journals PENGARUH WORKING CAPITAL TURNOVER (WCT), CURRENT RATIO (CR), DAN TOTAL ASSETS TURNOVER (TATO) TERHADAP PROFITABILITAS

2021 ◽  
Vol 8 (1) ◽  
pp. 1-8
Author(s):  
Melia Trie Utami ◽  
Gusganda Suria Manda
Keyword(s):  
Research Method ◽  
Stock Exchange ◽  
Linear Regression Analysis ◽  
Multiple Linear Regression Analysis ◽  
Coefficient Of Determination ◽  
Working Capital ◽  
Return On Assets ◽  
Current Ratio ◽  
Negative Effect ◽  
Positive Effect

The purpose of this study was to examine and analyze the effect of Working Capital Turnover (WCT), Current Ratio (CR), and Total Assets Turnover (TATO) on Profitability with the Return On Assets (ROA) proxy on cigarette sub sector companies listed on the Indonesia Stock Exchange (IDX) quarterly in 2014-2019, both partially and simultaneously. The research method used is descriptive verification with quantitative approaches. The sample in this study used purposive sampling. The statistical method used is the method of multiple linear regression analysis. The results showed that the Working Capital Turnover (WCT), Current Ratio (CR), and Total Assets Turnover (TATO) simultaneously had a significant effect on the Return on Assets (ROA) profitability. Partially Working Capital Turnover (WCT) has a significant negative effect on Return on Assets (ROA) profitability, Current Ratio (CR) has no effect on Return on Assets (ROA) Profitability, and Total Assets Turnover (TATO) has a significant positive effect on Return on Profitability Assets (ROA). The coefficient of determination obtained by 0.429 means that only 42.9% Profitability Return on Assets (ROA) is influenced by Working Capital Turnover (WCT), Current Ratio (CR), and Total Assets Turnover (TATO) and the rest 57.1 % is influenced by other variables.

scholarly journals PENGARUH KESESUAIAN KOMPENSASI DAN KULTUR ORGANISASI TERHADAP PERSEPSI PEGAWAI ATAS FRAUD DI INSTANSI PEMERINTAHAN KOTA MANADO

2019 ◽  
Vol 14 (1) ◽  
Author(s):  
. Jecklein ◽  
Lintje Kalangi ◽  
Stanley Kho Walandouw
Keyword(s):  
Asset Management ◽  
Linear Regression Analysis ◽  
Sampling Technique ◽  
Multiple Linear Regression Analysis ◽  
Employee Perceptions ◽  
City Government ◽  
Public Works ◽  
Government Agencies ◽  
Negative Effect ◽  
The City

This study aimed to explore the employee perceptions of fraud in government agencies and the factors that influence the occurrence of fraud . The variables used in this study are the compliance of compensation and culture of organization as independent variables and fraud in government agencies as the dependent variable. Samples used in this research as many as 60 respondents from government agencies in Manado, especially in the Regional Financial and Asset Management Agency and the Office of Public Works and Spatial Planning of the City of Manado. Sampling technique uses purposive sampling and data collection used questionnaires. The analysis in this study used multiple linear regression analysis with the help of SPSS version 23 application. The results showed that, there is no influence of the appropriateness of compensation by fraud in Manado City government agencies, and there is a significant negative effect on fraud in Manado City government agencies.

scholarly journals PENGARUH PENDIDIKAN, JUMLAH JAM KERJA, UMUR TERHADAP UPAH TENAGA KERJA DISABILITAS DI SUMATERA BARAT

2019 ◽  
Vol 1 (3) ◽  
pp. 863
Author(s):  
Salwa Nabila Putri ◽  
Ariusni Ariusni
Keyword(s):  
Work Experience ◽  
Linear Regression Analysis ◽  
Multiple Linear Regression Analysis ◽  
Least Square ◽  
Research Use ◽  
Ordinary Least Square ◽  
Negative Effect ◽  
Disabled Workers ◽  
Positive Effect ◽  
Research Show

This study aims to find out determine of wages for disabled workers in Sumatera Barat. This research use cross section with 481 samples. The variables used are wage for disabled workers,education, number of hours worked, age, work experience, type of work. This research’s methods used Ordinary Least Square (OLS) Multiple linear regression analysis. This research show education, number of work, work experience  had significanlly positive effect on wage for disabled workers in Sumatera Barat. Type of work has significanlly negative effect on wage for disabled worker, age had nonsignificanly positive effect on wage for disabled.

scholarly journals Net Income and CSR Disclosure as Predictors Shares Price and Return per Share

2019 ◽  
Vol 10 (1) ◽  
pp. 81-91
Author(s):  
Wahyuni Rusliyana Sari ◽  
Anita Roosmalina Matusin
Keyword(s):  
Positive Impact ◽  
Linear Regression Analysis ◽  
Multiple Linear Regression Analysis ◽  
Positive Influence ◽  
Net Income ◽  
Manufacturing Companies ◽  
Measurement Instruments ◽  
Environmental Liabilities ◽  
Negative Effect ◽  
Csr Disclosure

The purpose of this study was to determine the factors that influence shares price and return per share of 63 manufacturing companies period 2012-2016. The research method is multiple linear regression analysis, which done by the classical assumption test. The results of the research in the first model show that there is a positive influence between book value per share, net income, CSR social, and CSR report on shares price. While in the second model using the enter method shows delta net income and delta CSR total had a positive effect on return per shares, and delta CSR environment has a negative effect on return per share, while those using stepwise method delta CSR social and delta CSR net income had a positive impact on return per share. The contribution of this study is to provide information to stakeholders that CSR environment does not have an important role in shares prices, prioritizing the interests of shareholders, which means that the CSR environmental measurement instruments focus on disclosure, and ignore fundamental aspects, namely environmental liabilities. The implication is that the regulator, investor, and profession needs to more pay attention to CSR environmental.

scholarly journals The Effect of Profitability, Leverage, Liquidity, Size, and Company Growth on the Dividend Payout Ratio in the Indonesian Capital Market 2013-2018

2021 ◽  
Vol 4 (1) ◽  
pp. 1351-1360
Author(s):  
Anjumul Azhariyah ◽  
Andre Dwijanto Witjaksono ◽  
Ulil Hartono
Keyword(s):  
Regression Analysis ◽  
Capital Market ◽  
Sampling Method ◽  
Linear Regression Analysis ◽  
Multiple Linear Regression Analysis ◽  
Company Size ◽  
Dividend Payout ◽  
Testing Method ◽  
Negative Effect ◽  
Company Growth

This study aims to determine and analyze the effect of Profitability, Leverage, Liquidity, Size, and Company Growth on Dividend Payout Ratio in the Indonesian capital market 2013-2018. The population of this research is 525 companies from all sectors listed on the IDX except for the finance sector. By using purposive sampling method, the number obtained is 10 companies. The data testing method used is multiple linear regression analysis. The results showed that simultaneously the variables of profitability, leverage, liquidity, size and company growth had no effect on the dividend payout ratio. Partially, profitability, leverage, liquidity, company size have no effect on the dividend payout ratio, while the company growth variable has a significant negative effect on the dividend payout ratio.

scholarly journals Pengaruh Persepsi Kemudahan Penggunaan, Manfaat Dan Risiko Terhadap Minat Menggunakan Uang Elektronik Di Surabaya

2020 ◽  
Vol 17 (2) ◽  
Author(s):  
Hendra Prasetya ◽  
Scenda Erka Putra
Keyword(s):  
Perceived Risk ◽  
Linear Regression Analysis ◽  
Multiple Linear Regression Analysis ◽  
Ease Of Use ◽  
Public Understanding ◽  
Perceived Benefits ◽  
Perceived Ease Of Use ◽  
Electronic Money ◽  
Analysis Technique ◽  
Negative Effect

The problem examined in this study is whether the perceived ease of use, perceived benefits and perceived risk partially have asignificant effect on the interest in using electronic money in Surabaya. This study aims to determine the significance of the effect of perceived ease to use, perceived benefits and perceived risk of interest in using electronic money in Surabaya. There are three independent variable studied, namely perceived ease to use, perceived benefits and perceived risk. The dependent variable is interest in using. The population is people in Surabaya who know electronic money. Determination of the sample using purposive sampling with criteria at minimal 18 year old and using electronic money. The number sample processed was 94 samples. The analysis technique uses multiple linear regression analysis. The hypothesis testing using t test. The result is that perceived ease of use and perceived benefits partially have a significant positive effect and risk perception has a significant negative effect on interest in using electronic money in Surabaya. The implication is that electronic money issuers should continue to innovate electronic money by increasing or adding service features found in application on smartphones and making their operation easier and opening more places to fill electronic money. Public understanding of electronic money needs to be improved again.

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